Onchocerca lupi is a filarial nematode, a threadlike roundworm related to the parasites that cause river blindness in humans. Unlike many of its relatives, however, O. lupi targets the eyes of its hosts. In dogs and cats, infection produces a spectrum of signs ranging from ocular discharge and conjunctivitis to chronic nodular lesions involving the conjunctiva, the sclera, and the retrobulbar space behind the eyeball. The parasite has been documented in southwestern North America as well as in the Old World, and because it can also infect people, it carries genuine public health significance. Perhaps most troubling from a diagnostic standpoint is that many infections remain entirely subclinical, silently persisting in animals that never show obvious signs of disease and therefore never get tested.

The diagnostic toolbox for O. lupi has historically been limited. Confirmation of infection has relied primarily on microscopy and conventional PCR, or cPCR, applied either to adult worms recovered from nodules or to microfilariae, the larval stage, detected in skin snips. Real-time PCR, known as qPCR, has been applied mainly in large epidemiological surveys rather than routine clinical work. Each of these approaches has a critical weakness: amplification of O. lupi DNA can be inhibited by components of the sample matrix, producing false-negative results in animals that are actually infected. In a disease where a missed diagnosis can mean prolonged discomfort for a pet and continued zoonotic risk for its owners, that limitation matters.

Droplet digital PCR, or ddPCR, takes a fundamentally different approach to nucleic acid detection. Instead of relying on amplification curves and threshold comparisons, the technique partitions a sample into thousands of tiny water-in-oil droplets, each of which serves as an individual microreaction vessel. After amplification, each droplet is counted as either positive or negative, and the fraction of positive droplets is converted directly into an absolute number of target DNA copies in the original sample, without the need for a standard curve. This partitioning also dilutes out inhibitors that can derail conventional and real-time PCR reactions, making ddPCR particularly attractive for challenging sample types such as tissue biopsies and archived pathology specimens.

The research team set out with two goals: to validate a novel ddPCR assay capable of detecting O. lupi, and to assess how that assay performed compared with cPCR and qPCR in real clinical cases. The study population consisted of 202 suspected clinical cases submitted from 11 US states, the largest series of suspected O. lupi cases in companion animals assembled in the country to date. Dogs overwhelmingly dominated the caseload, accounting for 97 percent of the samples, or 196 of the 202 animals, while cats made up the remaining 3 percent, or six animals. The samples themselves were diverse: 34 were fragments of adult O. lupi specimens, 103 were subconjunctival nodule biopsies, 23 were interscapular skin snips, three were skin snips from the lower ear, and 39 were formalin-fixed paraffin-embedded tissue samples, the archival material that pathologists routinely generate. Critically, every one of these samples had already been assessed using both cPCR and qPCR, providing a direct head-to-head comparison.

The results were striking. Overall, ddPCR detected O. lupi DNA in 71.3 percent of the clinical cases, identifying 144 of 202 animals as positive. Among the dogs, ddPCR achieved a detection rate of 71.9 percent, or 141 of 196 animals, comfortably outperforming qPCR, which detected 64.8 percent, and conventional PCR, which managed only 54.1 percent. In other words, the digital method found positive results in dozens of animals that the older techniques had called negative. Among the six cats, all three diagnostic tests agreed, confirming infection in half of them. The pattern held across sample types, suggesting that the ddPCR assay’s advantage was not confined to a single kind of specimen but reflected a genuine improvement in analytical sensitivity.

Statistical analysis added nuance to the picture. The researchers used Cohen’s kappa, a measure of agreement between diagnostic methods that corrects for chance agreement, and found moderate agreement between cPCR and qPCR, with a kappa value of 0.74. Agreement between cPCR and ddPCR was fair, at 0.60, while qPCR and ddPCR showed almost perfect agreement, with a kappa of 0.81. A Cochran’s Q test was used to compare the pattern of positive and negative results across the three techniques. These statistics tell a coherent story: ddPCR agrees closely with qPCR but flags additional positives that both older methods miss, consistent with its ability to amplify DNA in samples where inhibitors or very low parasite burdens defeat conventional approaches.

The geographic scope of the study also yielded epidemiological insight. Positive detections were reported in 10 of the 11 states from which samples were submitted, although the authors note that travel history was not always available for the animals, making it difficult to draw firm conclusions about where infections were acquired. The finding nonetheless underscores that suspected O. lupi cases are being seen by veterinary practitioners across a wide swath of the United States, not merely in the southwestern states where the parasite was first documented in North America. For a zoonotic parasite, that broad footprint is a signal that clinicians well beyond the historical endemic zone should keep ocular onchocercosis on their differential lists when dogs and cats present with nodular or inflammatory eye lesions.

One of the assay’s most practical attributes is that it is host-agnostic, meaning it does not depend on the species of the infected animal and can therefore be applied across dogs, cats, and potentially other hosts. Combined with its demonstrated performance across multiple sample types, including the notoriously difficult FFPE archival tissues, this flexibility positions ddPCR as a tool not only for individual clinical diagnosis but also for the kind of large-scale surveillance studies needed to map the parasite’s true distribution. The authors argue that the validated assay supports improved epidemiological understanding and, ultimately, One Health-based prevention strategies that recognize the interconnected health of animals and people.

The study, which was partially funded by the Thomas B. and Jeannette E. Laws McCabe Fund at the University of Pennsylvania and sponsored in part by Elanco Animal Health through the CVBD World Forum Symposium, arrives at a moment when digital PCR is moving from specialized research laboratories into mainstream diagnostic use. For veterinarians confronting a dog with a mysterious conjunctival nodule, the message of this research is concrete: a negative conventional PCR result no longer means the parasite is absent. With a validated ddPCR assay now available, the invisible fraction of O. lupi infections, the subclinical and previously undiagnosed animals that quietly sustain transmission, may finally come into focus, and with it, a clearer picture of how this eye-dwelling worm spreads among the pets and people who share their homes.

Subject of Research: Validation of droplet digital PCR for enhanced molecular diagnosis of zoonotic Onchocerca lupi infection in companion animals

Article Title: Enhanced molecular diagnosis of Onchocerca lupi using droplet digital PCR in clinically suspected companion animals

Article References: Kelly, M. A., McLean, N. J., Peterson, S., Ferguson, S., Young, T., Foote, B., West, J., Campbell, J., Brown, K., Hakimi, H., Sobotyk, C., Weerarathane, P., & Verocai, G. G. (2026). Enhanced molecular diagnosis of Onchocerca lupi using droplet digital PCR in clinically suspected companion animals. Parasites & Vectors. https://doi.org/10.1186/s13071-026-07605-9

Image Credits: AI Generated

DOI: 10.1186/s13071-026-07605-9

Keywords: Onchocerca lupi, droplet digital PCR, molecular diagnostics, ocular onchocercosis, zoonotic parasites, companion animals, veterinary parasitology, filarial nematode, conventional PCR, real-time PCR, One Health, Parasites & Vectors

Styela clava, often called the clubbed tunicate or Asian sea squirt, and Styela plicata, the pleated sea squirt, are sessile marine invertebrates that attach themselves to rocks, docks, aquaculture gear, and hulls. Both have spread far beyond their native ranges and are now established in harbors and marinas across Europe, North America, and Asia, where they are notorious as fouling organisms that smother shellfish beds and compete with farmed mussels and oysters for space and food. Yet the same traits that make them ecological nuisances, including tolerance of wide salinity and temperature ranges and a knack for colonizing new substrates, have also made them candidates for cultivation. In South Korea, sea squirts are a recognized fishery product, and production has grown substantially over recent decades, with both species appearing in domestic markets and in processed seafood products.

The commercial rise of these tunicates has created an authentication challenge. Because the two species differ in texture, flavor profile, and market value, knowing exactly which species is in a package matters to buyers, traders, and food safety authorities. Morphological identification depends on features such as the texture of the outer tunic and the arrangement of internal organs, characteristics that are destroyed or obscured by processing steps like peeling, brining, and freezing. The research team, led by Yun Seo Jung and corresponding author Ho Soo Lim, set out to build a molecular identification method robust enough to work on simply processed seafood products, where visual inspection fails and DNA may be the only reliable evidence of species identity.

The core of the new method lies in the mitochondrial genome. The researchers designed species-specific primers targeting two mitochondrial genes: NADH dehydrogenase subunit 5, known as ND5, and cytochrome c oxidase subunit I, or COI. Both genes are widely used in animal DNA barcoding because they accumulate sequence differences between closely related species at a useful rate while remaining conserved within a species. By aligning sequences from S. clava and S. plicata and identifying positions where the two species consistently differ, the team designed primer pairs that anneal only to the DNA of one species and not the other. This primer design strategy exploits interspecies sequence variation so that amplification itself becomes the identification step: a positive signal for the S. clava primer set means S. clava DNA is present, and a positive signal for the S. plicata set means S. plicata DNA is present.

Specificity is the make-or-break property of any species identification assay, and the team tested all three platforms against a panel of non-target species to check for cross-reactivity. In every case, the assays amplified only their intended target. No signal appeared when the primers were challenged with DNA from other organisms that might plausibly co-occur in seafood samples. This clean specificity profile matters because seafood products are complex matrices that can contain DNA from multiple organisms, including associated microorganisms, and a test that fires spuriously would generate false positives in routine inspection settings. The absence of cross-reactivity across conventional, real-time, and ultrafast formats suggests the primer design, rather than the amplification chemistry, is doing the discriminating work, which bodes well for transferring the assays to other instruments.

Sensitivity testing revealed how little DNA the assays need to succeed. Both the real-time PCR and the ultrafast real-time PCR formats reliably detected genomic DNA at concentrations as low as 1 x 10 to the minus 3 nanograms per microliter for both species. That level of detection corresponds to vanishingly small amounts of starting material, which is critical for processed foods where DNA is often fragmented and degraded by heat, salt, and storage. Conventional PCR, which relies on post-amplification gel electrophoresis to visualize products, was also functional but slower and less convenient for high-throughput screening. Real-time PCR adds the advantage of fluorescence-based detection during amplification, eliminating the need to open tubes after the reaction and thereby reducing contamination risk, a well-known hazard in diagnostic laboratories.

The standout result, however, came from the ultrafast real-time PCR platform. By combining rapid thermal cycling hardware with the optimized primer sets, the researchers achieved complete species identification within fifty minutes. Conventional workflows, including DNA extraction, amplification, and gel-based analysis, typically stretch over several hours and require well-equipped laboratory facilities. An assay that delivers a definitive answer in under an hour changes the practical calculus for food inspectors, port authorities, and customs officers who need results while a shipment is still in hand. The ultrafast format also aligns with a broader trend in food authentication research, where portable and microfluidic PCR devices are being paired with streamlined DNA extraction to enable on-site testing at markets, processing plants, and border checkpoints.

The implications extend beyond routine food labeling. Both Styela species are documented invasive species with significant ecological and economic footprints. S. clava, native to the Northwest Pacific, invaded European waters in the twentieth century and devastated shellfish farming in areas such as the Bassin de Thau in France, where it fouls cultivated oysters and competes for resources. S. plicata has similarly established populations in warm-temperate harbors worldwide, including along the Mediterranean coast of Israel, where researchers have studied its heat tolerance as an indicator of its invasive potential. Molecular tools that can rapidly and unambiguously identify these species have dual value: they protect seafood authenticity and they support marine biosecurity surveillance, where early detection of invasive tunicates in ballast water, hull fouling, or environmental samples can inform management responses before populations become established.

The Korean research context gives the work particular urgency. Statistics Korea data show that sea squirt production has grown into a meaningful component of the national fishery, and investigative reporting has previously highlighted deliberate seafood mislabeling in South Korean markets. Regulatory agencies, including the Ministry of Food and Drug Safety, which funded this study through grant 24191MFDS053, have an interest in validated, standardized methods for verifying species claims on processed products. The new assays were developed with such applications in mind, and the authors position the ultrafast real-time PCR format as a practical tool for on-site detection in simply processed seafood, meaning products that have undergone minimal transformation and still yield amplifiable DNA.

The comparative design of the study also offers a template for future authentication work. By evaluating the same primer sets across three amplification platforms, the researchers could weigh trade-offs that laboratories face when choosing among methods: conventional PCR is inexpensive and equipment-light but slow and contamination-prone; real-time PCR is sensitive, quantitative, and closed-tube but requires more sophisticated instrumentation; ultrafast real-time PCR compresses the timeline dramatically but depends on specialized rapid-cycling hardware. For a food inspection laboratory deciding where to invest, the demonstration that a fifty-minute, species-specific, highly sensitive assay is achievable for Styela species makes a compelling case for the ultrafast format, particularly as portable devices bring the technology closer to docks and processing floors. As seafood supply chains grow longer and more global, and as consumers increasingly demand verified provenance, rapid molecular authentication tools of this kind are likely to move from research papers into the standard toolkit of food safety authorities, ensuring that what the label says about a humble sea squirt is exactly what is in the package.

Subject of Research: Development and comparative evaluation of PCR-based assays for species identification of the sea squirts Styela clava and Styela plicata in seafood authentication

Article Title: Comparative evaluation of conventional, real-time, and ultrafast real-time PCR assays for accurate identification of Styela clava and Styela plicata

Article References: Jung, Y. S., Yi, J. S., Cho, A., Lim, H. S., & Chang, M. I. (2026). Comparative evaluation of conventional, real-time, and ultrafast real-time PCR assays for accurate identification of Styela clava and Styela plicata. Food Science and Biotechnology. https://doi.org/10.1007/s10068-026-02323-5

Image Credits: AI Generated

DOI: 10.1007/s10068-026-02323-5

Keywords: Styela clava, Styela plicata, PCR, real-time PCR, ultrafast PCR, seafood authentication, food inspection, mitochondrial DNA, ND5 gene, COI gene, tunicates, species identification

Diabetic kidney disease is the leading cause of chronic kidney failure worldwide, and its burden is expanding in lockstep with the global epidemic of type 2 diabetes. In Egypt, where diabetes prevalence ranks among the highest in the Middle East and North Africa, the clinical stakes are particularly high. Yet the diagnostic toolkit for diabetic nephropathy, the kidney-specific complication of diabetes, has remained stubbornly crude. Physicians typically rely on the urinary albumin-to-creatinine ratio, or UACR, a measure of how much of the protein albumin leaks into the urine, along with estimated glomerular filtration rate, or eGFR, which gauges how well the kidneys filter blood. Both markers have well-known blind spots. Albuminuria can fluctuate with infection, exercise, and glycemic control, and some patients lose filtration capacity without ever spilling significant albumin. The search for a more reliable, earlier, and more specific indicator has therefore become something of a holy grail in nephrology.

Long noncoding RNAs have emerged as unexpected candidates. These molecules, typically longer than two hundred nucleotides, do not code for proteins but instead participate in regulating gene expression, chromatin structure, and cellular signaling. In the kidney, several lncRNAs have been implicated in the fibrotic and inflammatory cascades that progressively scar the delicate filtering units known as glomeruli. PVT1, located on chromosome 8, first attracted attention in cancer biology, where its overexpression drives proliferation in lymphomas and other malignancies. More recently, genetic studies have linked a region near PVT1 to susceptibility to diabetic nephropathy, and experimental work has suggested that the RNA contributes to renal cell injury under high-glucose conditions. What remained uncertain was whether PVT1 levels measurable in the blood track the clinical severity of kidney damage in a real-world patient population.

To answer that question, the Cairo-based team enrolled eighty adults and divided them into four groups of twenty each. Three groups consisted of patients with type 2 diabetes, stratified by their urinary albumin-to-creatinine ratio into those with normal albumin excretion, moderately increased albuminuria, and severely increased albuminuria, the standard staging categories used to grade diabetic kidney disease. The fourth group comprised healthy controls. The researchers also performed fundus examinations to classify the diabetic participants according to whether they had diabetic retinopathy, an eye complication that often parallels kidney involvement. Every participant underwent a full clinical and laboratory workup, and serum levels of PVT1 were quantified using real-time polymerase chain reaction, a technique that amplifies and measures specific RNA sequences with high sensitivity.

The results were striking. Serum PVT1 expression was markedly elevated across the diabetic groups compared with the healthy controls, and within the diabetic cohort, levels climbed with disease stage: patients with severely increased albuminuria showed significantly higher PVT1 than those with normal urinary albumin. In other words, the RNA signal in the blood rose in step with the conventional staging of kidney damage, suggesting that PVT1 is not merely a binary flag for the presence of disease but a graded readout of its progression.

The correlation analysis deepened the picture. PVT1 levels showed a significant positive association with UACR, serum creatinine, age, body mass index, fasting blood glucose, two-hour postprandial glucose, and glycated hemoglobin, or HbA1c. The links to glucose measures are particularly intriguing, because they hint that PVT1 expression responds to the glycemic environment itself, the very insult that drives diabetic tissue damage. The positive association with creatinine, a waste product that accumulates when filtration falters, reinforces the connection to declining renal function. Conversely, PVT1 correlated negatively with eGFR, the best available summary of kidney filtering capacity, as well as with alanine aminotransferase, a liver enzyme, and platelet count. The negative correlations with eGFR and platelets fit a pattern in which advancing kidney disease and its systemic complications are mirrored by falling values of protective or homeostatic markers.

Perhaps the most consequential finding came from the regression analysis. When the researchers tested which variables independently predicted proteinuria, the abnormal leakage of protein into urine that defines progressive diabetic nephropathy, PVT1 stood alone as the sole independent predictor among the diabetic patients. That means that even after accounting for age, glycemic control, and other clinical factors, the serum RNA level carried predictive information about kidney involvement that the other measures did not. If confirmed in larger and more diverse cohorts, this property could make PVT1 a genuinely additive biomarker, one that complements rather than duplicates the existing panel.

The study’s design and context deserve careful attention. It was conducted at Kasr Al-Ainy Hospital, the historic teaching hospital of Cairo University’s Faculty of Medicine, and approved by the institution’s ethical committee with oral and written informed consent obtained from participants or their eligible relatives, in accordance with the Declaration of Helsinki. The cohort size of eighty, while adequate for detecting the reported differences, is modest, and the cross-sectional design captures a single moment in time rather than following patients forward. A cross-sectional correlation between PVT1 and kidney stage cannot by itself prove that the RNA drives disease progression or that it predicts future decline; it establishes association. Prospective studies that track PVT1 levels over years, alongside serial measurements of eGFR and albuminuria, will be needed to establish whether the molecule can forecast deterioration before conventional markers move.

There are also mechanistic questions that the clinical data raise but do not resolve. Is serum PVT1 merely a passive shed product of injured kidney cells, a molecular echo of tissue damage, or does it actively participate in the fibrotic and inflammatory processes that destroy glomeruli? Experimental evidence from cell and animal models suggests the latter is plausible, with PVT1 implicated in pathways of renal cell apoptosis and extracellular matrix accumulation under diabetic conditions. If the RNA is causally involved, it becomes not just a biomarker but a therapeutic target, and the authors of the new study explicitly frame it as such. Silencing or sequestering specific lncRNAs is technically feasible with antisense oligonucleotides and related technologies, several of which have already reached clinical use in other organ systems, though delivering such drugs safely to kidney tissue in diabetes remains a distant goal.

For now, the practical significance lies in diagnostics. A blood-based RNA marker could be measured alongside routine chemistry, potentially catching kidney involvement earlier or stratifying risk more finely than urine albumin alone. It could also help resolve the vexing subgroup of diabetic patients whose kidney function declines without marked albuminuria, a pattern increasingly recognized as its own clinical entity. The Egyptian setting matters as well: populations differ in genetic background, environmental exposures, and healthcare access, and biomarkers validated in one population do not automatically transfer to another. By demonstrating the PVT1 signal in an Egyptian cohort, the study extends the geographic and ethnic reach of the evidence, though replication in independent cohorts within Egypt and beyond remains essential before any clinical deployment.

The broader lesson is about where medicine is looking for its next generation of tests. For decades, clinical chemistry has been dominated by proteins and metabolites, molecules whose abundance reflects the downstream consequences of disease. Noncoding RNAs occupy a different layer of the biological hierarchy, closer to the regulatory programs that orchestrate tissue response to injury. Their dysregulation can be specific to particular pathological pathways in ways that generic markers like creatinine are not. The Cairo study, with its demonstration that a single serum lncRNA rises with diabetic kidney disease severity and independently predicts proteinuria, offers a concrete example of that promise. It also illustrates the standard trajectory of biomarker science: an intriguing association in a well-characterized cohort, followed by the harder work of validation, mechanistic dissection, and prospective testing. If PVT1 survives that gauntlet, the dark matter of the genome may earn a permanent place in the nephrologist’s toolkit, and patients with diabetes may gain an earlier, clearer warning that their kidneys are under siege.

Subject of Research: Serum long noncoding RNA PVT1 as a biomarker of diabetic nephropathy severity in Egyptian patients with type 2 diabetes

Article Title: Serum long noncoding RNA human plasmacytoma variant translocation 1 (PVT1) expression levels in Egyptians type 2 diabetic patients and its correlation with severity of diabetic nephropathy

Article References: Tarabay, A., Shaker, O. G., ElSayed, N. M., Allam, D., Abdellatef, A., & Attia, M. (2026). Serum long noncoding RNA human plasmacytoma variant translocation 1 (PVT1) expression levels in Egyptians type 2 diabetic patients and its correlation with severity of diabetic nephropathy. BMC Endocrine Disorders, 26(1), Article 275. https://doi.org/10.1186/s12902-026-02449-x

Image Credits: AI Generated

DOI: 10.1186/s12902-026-02449-x

Keywords: type 2 diabetes, diabetic kidney disease, diabetic nephropathy, long noncoding RNA, PVT1, biomarker, albuminuria, proteinuria, eGFR, real-time PCR, Egypt, Cairo University

The research, published in the Journal of Agriculture and Food Research, was led by Keisuke Soga and colleagues at Japan’s National Institute of Health Sciences and collaborating institutions. The team took soybean samples that had previously been analyzed for herbicide residues and subjected the very same material to a battery of event-specific real-time PCR tests. Their goal was exploratory but ambitious: to see whether the residue profile of glyphosate, glufosinate, and their metabolites could be matched to particular herbicide-tolerance traits in commercially distributed soybeans imported from the United States and Brazil.

The logic behind the approach rests on the biochemistry of herbicide tolerance. Glyphosate kills plants by inhibiting 5-enolpyruvylshikimate-3-phosphate synthase, or EPSPS, an enzyme essential for synthesizing aromatic amino acids through the shikimate pathway. Glyphosate-tolerant soybeans evade this attack by carrying a modified epsps gene, such as the cp4 epsps gene borrowed from the soil bacterium Agrobacterium tumefaciens strain CP4, which produces an enzyme the herbicide cannot bind. Glufosinate works differently: it blocks glutamine synthetase, causing toxic ammonia to accumulate and shutting down photosynthesis. Soybeans tolerate glufosinate by carrying the pat or bar gene, which encodes phosphinothricin N-acetyltransferase, an enzyme that acetylates the herbicide into N-acetyl-glufosinate, an inactive compound that no longer threatens the plant.

These mechanisms create a chemical fingerprint. A soybean carrying a modified epsps gene can survive glyphosate spraying and may retain detectable glyphosate residues, but it cannot convert glufosinate into its acetylated form. Conversely, a soybean carrying pat can metabolize glufosinate into N-acetyl-glufosinate, so the presence of that metabolite hints at a pat-containing event. The Japanese team reasoned that detecting glyphosate or the acetylated glufosinate metabolite in a shipment should statistically correlate with the presence of the corresponding transgenes, and that the strength of the correlation might even reveal which specific events dominate cultivation in the exporting country.

The sample set consisted of fifteen soybean lots: one edible soybean sample grown in Japan, eight feed samples from the United States, three non-GM samples from the United States imported under identity-preserved handling, and three feed samples from Brazil. Identity-preserved systems segregate non-GM soybeans from GM ones through documentation and traceability, though they cannot guarantee the complete absence of unintended commingling. The researchers ground 100 grams of each sample in a cryogenic mill, extracted genomic DNA, and screened for eleven GM events using primers and probes drawn from the European Union’s GMOMETHODS database and Japanese official detection methods, with the soybean lectin gene serving as an endogenous reference.

The qualitative results were striking. In the non-GM samples, GM events were essentially undetectable, with only a faint signal for event DAS-44406 in one sample. In the American feed samples, the team detected RRS, MON89788, FG72, A2704-12, A5547-127, and DAS-44406, while Brazilian feed samples were dominated by RRS, MON89788, and DAS-81419. The edible Japanese sample contained none of the tested events. Crucially, the events found in the herbicide-positive samples matched the residue chemistry: glyphosate-containing lots carried high levels of epsps-harboring events, and lots containing N-acetyl-glufosinate carried high levels of pat-harboring events.

Quantification sharpened the picture considerably. In American feed samples where glyphosate was detected, MON89788 ranged from 8.7 to 50.7 percent commingling, and DAS-44406, a stacked event carrying 2mepsps, pat, and aad-12 transgenes, reached an extraordinary 41.3 to 71.6 percent. In Brazilian feed samples, MON89788 dominated at 62.6 to 102.6 percent, with the value above 100 percent attributed to inherent measurement uncertainty in event-specific quantitative PCR rather than an impossible true percentage. Meanwhile, the American feed sample in which neither glufosinate nor its metabolite was detected showed low commingling for the pat-containing events, at 0.4 percent for DAS-44406 and 1.1 percent for A5547-127, reinforcing the link between the metabolite and the trait.

The authors interpret these patterns through the lens of regional agricultural practice. In the United States, herbicide use on soybeans has diversified markedly as growers battle glyphosate-resistant weeds. Department of Agriculture surveys show that in 2006 more than 50 million soybean acres were treated exclusively with glyphosate, but by 2012 that area had shrunk by roughly 20 million acres as farmers adopted tank mixes. By 2023, glyphosate isopropylamine remained the most widely used herbicide at 46 percent of planted acres, but 2,4-D choline salt followed at 37 percent, with glufosinate-ammonium at 23 percent. This diversification aligns neatly with the prominence of DAS-44406, whose stacked transgenes confer tolerance to glyphosate, glufosinate, and 2,4-D simultaneously.

Brazil tells a different story. No-tillage systems dominate Brazilian soybean production, and without plowing to control weeds, farmers lean heavily on herbicides; glyphosate was applied to roughly 95 percent of the soybean area by 2021. The insect-protected and glyphosate-tolerant stacked variety MON 87701 x MON 89788, introduced in the 2013/14 season, expanded from 1.2 million hectares to more than 30 million hectares, about 80 percent of national acreage by 2020/21. That near-total adoption explains why MON89788 commingling in Brazilian feed samples reached such extreme levels, while glufosinate-tolerant events remained scarce at 0.2 to 3.2 percent. The researchers note that as glyphosate-resistant weeds spread in Brazil, additional herbicide-tolerance traits may follow the American trajectory, making continued monitoring essential.

The study’s implications extend beyond curiosity. If herbicides or their metabolites appear in a product labeled non-GM, that could signal the presence of GM material and justify verification against labeling regulations, as illustrated by the glufosinate found in the identity-preserved American samples, which the authors attribute to cultivation practices, environmental sources, post-harvest handling, or commingling below the detection range of the genetic assays. Conversely, residue data can cross-check genetic findings, boosting overall reliability. The authors also point toward future work on 2,4-D and dicamba, whose tolerance events, DAS-44406 and MON87708 respectively, metabolize these auxin-mimicking herbicides into detectable signature compounds. Because the sample set was small, the team frames the work as exploratory rather than a quantitative correlation analysis, but the concept is clear: two regulatory silos, pesticide monitoring and GM surveillance, each hold half of a story that only makes full sense when the datasets are combined. Extending this integrated approach to maize and other crops could give food safety authorities a powerful, mutually validating tool for traceability and enforcement in global commodity chains.

Subject of Research: Association between herbicide residues and herbicide-tolerance GM soybean events in imported soybean samples

Article Title: Association between herbicide residues and herbicide tolerance-related genetically modified events in imported soybean samples

Article References: Soga, K., Yoshiba, S., Takabatake, R., Taguchi, T., Tsutsumi, T., Ito, R., Iwasaki, Y., Akiyama, H., & Shibata, N. (2026). Association between herbicide residues and herbicide tolerance-related genetically modified events in imported soybean samples. Journal of Agriculture and Food Research, 31, Article 103321. https://doi.org/10.1016/j.jafr.2026.103321

Image Credits: AI Generated

DOI: 10.1016/j.jafr.2026.103321

Keywords: glyphosate, glufosinate, genetically modified soybeans, herbicide tolerance, real-time PCR, food safety monitoring, maximum residue limits, MON89788, DAS-44406, identity preservation, Brazil soybean exports, United States soybean exports

The research, published in Food Science and Biotechnology, was conducted by Ji-Yeon Lee, Ju-Hui Lee, Eun-Young Chung, and Sang-Soon Kim across Konkuk University, Dankook University, and the Korea Agro-Fisheries and Food Trade Corporation. Rather than testing disinfection in laboratory beakers, the team evaluated three systems in commercial-scale cold rooms held at 1 plus or minus 0.5 degrees Celsius: hypochlorous acid water applied at concentrations of 50 to 80 parts per million, a dielectric barrier discharge cold plasma system generating roughly 30 parts per billion of ozone, and gaseous chlorine dioxide released in total amounts ranging from 12.96 to 22.68 grams. The choice of technologies is significant because all three are non-thermal, meaning they kill or suppress microorganisms without heat, avoiding the tissue damage that thermal treatments would inflict on delicate leafy vegetables.

Sclerotinia sclerotiorum is a formidable adversary in postharvest systems. The fungus causes Sclerotinia rot, a destructive disease of solanaceous and brassicaceous crops worldwide, and it survives in soil as hardened sclerotia that can germinate and infect stored produce when conditions turn humid and cool. In stored cabbage, infection spreads head to head, and a single decayed leaf can contaminate an entire pallet unit. Traditional control relies heavily on synthetic fungicides or chlorine washes, both of which face increasing regulatory and consumer resistance. This is precisely the gap the Korean team set out to fill, testing whether non-thermal disinfection could suppress the pathogen while preserving the quality attributes that make cabbage suitable for kimchi production.

The first headline finding is encouraging: all three systems suppressed mold growth during the storage trial. To confirm the identity of the spoilage organism, the researchers turned to molecular diagnostics rather than relying solely on visual symptoms. Using real-time polymerase chain reaction, they verified that the mold colonizing the stored cabbage was indeed Sclerotinia sclerotiorum. This matters because accurate pathogen identification underpins every subsequent decision about treatment efficacy. Visual decay can be caused by multiple fungi and bacteria, and misidentification could lead growers and storage operators to deploy the wrong intervention. The molecular confirmation anchors the study’s conclusions in a verifiable biological target.

Among the three technologies, chlorine dioxide emerged as the strongest antifungal agent. This gaseous oxidant has a growing track record in postharvest science; previous studies have shown it controlling green mold in citrus, suppressing postharvest fungi in longan fruit, and extending the freshness of strawberries during export. Its advantage lies in its ability to penetrate air spaces within palletized produce and reach surfaces that liquid sanitizers cannot easily contact. For a leafy, layered vegetable like Napa cabbage, where outer leaves shield inner ones, that gaseous reach is a genuine technical asset. The study’s results add Sclerotinia rot of cabbage to the list of postharvest diseases that chlorine dioxide can meaningfully suppress under realistic storage conditions.

But the story is not one of unqualified triumph, and this is where the research becomes genuinely instructive. Chlorine dioxide treatment came with a measurable cost: heads treated with the gas showed a significantly higher mean weight loss of 9.48 percent during days 79 to 93 of storage, a statistically significant difference at the p less than 0.05 level. The authors attribute this late-storage weight penalty to oxidative degradation of the epicuticular wax, the thin, waxy cuticular layer that coats cabbage leaves and acts as the plant’s primary barrier against water loss. In effect, the same oxidative chemistry that destroys fungal cells also erodes the vegetable’s own waterproofing. Once the wax layer is compromised, water vapor escapes faster, heads lose turgor, and marketable weight drains away. It is a textbook example of a postharvest trade-off between microbial control and physiological preservation.

The cold plasma system revealed a subtler complication. Dielectric barrier discharge plasma generates a cocktail of reactive oxygen and nitrogen species, including ozone at the roughly 30 parts per billion levels measured in this trial. While the plasma suppressed mold, the researchers observed localized reductions in soluble solids, the sugars and dissolved compounds that contribute to flavor and fermentation quality, in cabbage positioned near the device. The team interprets this as a dose-dependent physiological stress response: produce closest to the plasma source experiences the highest reactive species flux, and that oxidative stress appears to draw down the vegetable’s soluble carbohydrate reserves. For kimchi production, soluble solids are not a trivial metric, because the sugars available at fermentation time influence lactic acid bacterial activity and final product character. The finding suggests that plasma systems for whole-pallet cabbage will need careful engineering of dose uniformity, not just raw antimicrobial power.

Hypochlorous acid, the third technology, occupies a middle ground. Electrolyzed water and HOCl treatments have gained popularity as chlorine alternatives because the agent is effective at low concentrations and degrades into benign residues. Applied at 50 to 80 parts per million, it contributed to mold suppression without the dramatic weight loss penalty seen with chlorine dioxide. However, as a liquid or aerosol contact sanitizer, it faces the inherent limitation of any surface-applied treatment on a multilayered head of cabbage: penetration is imperfect, and protected microsites between leaves can harbor surviving inoculum that resurfaces later in storage.

Perhaps the most consequential finding for storage operators is temporal: the efficacy of all three systems declined after day 51 of the 93-day trial. Non-thermal disinfection, in other words, is not a set-and-forget solution for multi-month storage. Residual antimicrobial activity fades, whether because the oxidants dissipate, the released gas is exhausted, or surviving microbes adapt to the residual stress environment, a phenomenon consistent with broader research on microbial adaptations to bactericidal stresses. The authors conclude that integration with controlled atmosphere or modified atmosphere packaging is necessary for extended storage stability. This positions non-thermal disinfection not as a standalone fix but as the first line of a layered defense: an initial microbial knockdown followed by atmospheric modification that slows respiration and suppresses pathogen regrowth for the remainder of the storage period.

The broader context gives this work urgency. South Korea’s government purchases Napa cabbage for market stabilization, and the study was supported by the Korea Agro-Fisheries and Food Trade Corporation as part of a long-term storage demonstration project for government-purchased cabbage, with additional funding from the Korea AeroSpace Administration. As climate assessments continue to document shrinking highland growing capacity, the ability to store spring-harvested cabbage for three months or more becomes a matter of national food security, not merely agricultural convenience. What this study delivers is a realistic, commercial-scale evidence base: chlorine dioxide offers the strongest antifungal punch but demands wax-preserving dose optimization; cold plasma requires spatially uniform dosing to protect soluble solids; hypochlorous acid is a gentler but less penetrating option; and none of them alone can carry cabbage through a full storage season. The future of kimchi’s core ingredient, it turns out, will be engineered through combinations of technologies, calibrated leaf by leaf and day by day.

Subject of Research: Non-thermal disinfection of Sclerotinia sclerotiorum decay in stored Napa cabbage

Article Title: Effects of non-thermal disinfection systems on Sclerotinia sclerotiorum decay and quality attributes of spring-harvested Napa cabbage during long-term storage in South Korea

Article References: Lee, J.-Y., Lee, J.-H., Chung, E.-Y., & Kim, S.-S. (2026). Effects of non-thermal disinfection systems on Sclerotinia sclerotiorum decay and quality attributes of spring-harvested Napa cabbage during long-term storage in South Korea. Food Science and Biotechnology. https://doi.org/10.1007/s10068-026-02288-5

Image Credits: AI Generated

DOI: 10.1007/s10068-026-02288-5

Keywords: Napa cabbage, Sclerotinia sclerotiorum, chlorine dioxide, cold plasma, hypochlorous acid, postharvest quality, non-thermal disinfection, kimchi, food storage, climate change, real-time PCR, South Korea

In a study published in BMC Complementary Medicine and Therapies, a team led by Fahime Edalat, Fatemeh Jahedi, Neda Pirbonyeh and Afagh Moattari of Shiraz University of Medical Sciences, working with colleagues at Tehran University of Medical Sciences, Ardakan University and Tarbiat Modares University, systematically evaluated the antiviral activity of an aqueous-alcoholic extract of Adiantum capillus-veneris against influenza A(H1N1) in cell culture. The research was conceived against a backdrop of increasing concern about antiviral resistance and a growing interest in herbal medicines that combine anti-inflammatory and antioxidant properties with potential direct antiviral effects. Although A. capillus-veneris has a long history of folk use for respiratory complaints, its potential to inhibit influenza viruses had never been rigorously tested, making the new work the first detailed in vitro characterization of its anti-influenza activity.

The team adopted a carefully staged experimental design to disentangle the different ways in which a botanical extract might interfere with viral infection. The first step was to establish the safety profile of the extract for the host cells. Using Madin-Darby Canine Kidney cells, the standard laboratory substrate for influenza research, the investigators applied the MTT assay, a colorimetric test that measures metabolic activity and therefore cell viability, to determine the 50 percent cytotoxic concentration, or CC50, of the extract. This value defines the dose at which the extract harms half of the host cells and thus sets the ceiling for any antiviral testing. The extract exhibited a CC50 of approximately 1 milligram per milliliter, a result the researchers describe as indicating moderate cytotoxicity. Armed with this safety threshold, they could then probe concentrations well below the toxic limit for genuine antiviral effects.

To explore how the extract might interact with the viral life cycle, the researchers introduced it at three distinct stages relative to infection. In the pre-treatment scenario, cells were exposed to the extract before the virus arrived, testing whether the plant preparation could prime the cellular environment or block viral attachment in some way. In the co-treatment scenario, extract and virus were applied simultaneously, probing interactions during the earliest steps of infection such as binding and entry. In the post-treatment scenario, the extract was added after viral inoculation, asking whether it could suppress replication once the virus had already gained entry to the cells. For comparison, oseltamivir was tested separately, added one hour after viral inoculation, replicating its clinical role as a post-exposure inhibitor of viral spread.

The readouts were equally comprehensive. Cytopathic effects, the visible damage that influenza inflicts on infected cell monolayers, were monitored 48 to 72 hours after inoculation. Viral titers were then quantified using three independent methods: the hemagglutination assay, which measures the ability of viral particles to agglutinate red blood cells; quantitative real-time PCR, which tracks viral RNA load; and the TCID50 assay, which calculates the tissue culture infectious dose, a functional measure of how much infectious virus remains. Together these assays provided a multi-angle view of viral burden, reducing the risk that a single methodological artifact could be mistaken for a true antiviral effect.

The results were striking. In the TCID50 assays, the extract demonstrated strong antiviral activity across concentrations ranging from 0.02 to 0.5 milligrams per milliliter, all comfortably below the cytotoxic threshold. The most impressive finding came from the pre-treatment arm: at a concentration of just 0.1 milligrams per milliliter, extract administered before infection reduced viral load by 99.9 percent, a reduction of three orders of magnitude in infectious virus. Meanwhile, at 0.5 milligrams per milliliter, the extract suppressed viral replication when applied during the infection window itself. The fact that pre-treatment produced the most dramatic suppression suggests that the extract may interfere with early events in the viral life cycle, perhaps by altering host cell surface receptors, blocking viral binding or entry, or inducing intracellular states less hospitable to the virus. The researchers caution, however, that the precise molecular stage at which the inhibition occurs remains to be determined.

Perhaps the most clinically relevant discovery, though, emerged when the extract was tested in combination with oseltamivir. When oseltamivir at concentrations of 0.5 and 0.05 milligrams per milliliter was paired with the extract at 0.5, 0.1 and 0.05 milligrams per milliliter, the combination produced a synergistic effect against influenza A(H1N1), delivering suppression that clearly surpassed what oseltamivir alone could achieve. Synergy of this kind is a significant observation for several reasons. First, it suggests that the extract and the neuraminidase inhibitor act on different aspects of the viral life cycle or on complementary molecular targets, since compounds competing for the same target typically show additive rather than synergistic effects. Second, combination approaches can lower the effective dose of each agent, potentially reducing side effects and, critically, slowing the emergence of drug-resistant viral variants, which thrive under monotherapy pressure. If the in vitro findings can be extended in animal models and eventually in clinical settings, an extract-based adjunct to standard antiviral therapy could offer a valuable hedge against oseltamivir resistance.

The biological plausibility of such effects is grounded in what is already known about Adiantum capillus-veneris. The fern, found across temperate and tropical regions, has featured in traditional medical systems as a remedy for coughs, bronchitis and other respiratory conditions. Previous phytochemical and pharmacological studies have attributed anti-inflammatory and antioxidant properties to its preparations, characteristics that could modulate the host environment in ways unfavorable to viral replication. The new study adds a direct antiviral dimension to this picture, although the authors emphasize that the specific chemical constituents responsible for the observed activity have not yet been identified. Flavonoids, phenolic acids and triterpenoids are common candidates in fern extracts, but confirming the active molecules will require bioassay-guided fractionation, a process of progressively separating and testing extract components to pinpoint the compounds carrying the antiviral punch.

The researchers are candid about the limits of their work. The experiments were conducted entirely in vitro, in a cell culture system that cannot capture the complexity of a living host, including immune responses, pharmacokinetics, metabolism and tissue distribution. The moderate cytotoxicity profile, with a CC50 close to the antiviral concentrations used, means that any future therapeutic application will require careful optimization of dose, formulation and potentially the isolation of active compounds to improve the therapeutic window. The study was performed in accordance with the Declaration of Helsinki and approved by the Ethics Committee of Shiraz University of Medical Sciences, and it was funded by Shiraz University of Medical Sciences. The authors also disclosed that they used ChatGPT for assistance with English language editing while retaining full responsibility for the scientific content, data analysis, interpretation and conclusions.

Looking forward, the research team recommends two priorities: identifying the specific active components of the extract and determining the exact stage of viral replication at which inhibition occurs. Both are essential steps on the long road from cell culture to clinic. If a discrete molecule can be isolated, characterized and shown to inhibit influenza A(H1N1) at achievable, non-toxic concentrations, it could become a lead compound for drug development or a standardized herbal medicine candidate. Even short of that, the demonstration that a traditional fern remedy can achieve a 99.9 percent reduction in viral load in pre-treated cells, and can synergize with a widely used antiviral drug, adds weight to the growing argument that ethnobotanical knowledge remains a rich and underexplored reservoir of antiviral potential. As influenza continues to mutate and evade single-target drugs, the maidenhair fern, a humble plant steeping in a laboratory beaker in Shiraz, may yet contribute something unexpected to the arsenal against one of humanity’s oldest viral adversaries.

Subject of Research: Antiviral activity of Adiantum capillus-veneris L. plant extract against influenza A(H1N1) in vitro

Article Title: Unveiling the antiviral activity of Adiantum capillus-veneris L. against influenza A(H1N1)

Article References: Edalat, F., Jahedi, F., Taghiabadi, Z., Letafati, A., Pirbonyeh, N., Pourghanbari, G., Shatizadeh Malekshahi, S., & Moattari, A. (2026). Unveiling the antiviral activity of Adiantum capillus-veneris L. against influenza A(H1N1). BMC Complementary Medicine and Therapies. https://doi.org/10.1186/s12906-026-05584-z

Image Credits: AI Generated

DOI: 10.1186/s12906-026-05584-z

Keywords: influenza A(H1N1), Adiantum capillus-veneris, antiviral activity, herbal extract, oseltamivir, TCID50, MDCK cells, real-time PCR, hemagglutination assay, cytotoxicity, synergy, natural remedies