Raw milk accounted for nearly all of the contamination. Nine of the 170 raw milk samples drawn from dairy cooperatives and collection centres tested positive, a prevalence of 5.29 percent, while a single positive emerged from the 60 samples taken from milking apparatus and transit containers. Strikingly, none of the 90 pasteurised milk samples and none of the 50 worker-related swabs harboured the organism. Eight of the ten raw milk collection centres surveyed showed at least some contamination, with the highest rates reaching 10 percent of samples at individual cooperatives. The pattern is unambiguous: the early, unprocessed stages of the milk chain are where L. monocytogenes persists, and the industrial treatments applied downstream are doing their job.

The complete absence of the pathogen from pasteurised milk is a direct endorsement of the high-temperature, short-time protocol used by the commercial dairies in the region, which heat milk to between 72 and 75 degrees Celsius for 15 seconds before packaging. L. monocytogenes is a non-spore-forming bacterium and is highly vulnerable to these time-temperature combinations, provided that strict hygiene is maintained after treatment to prevent recontamination. The finding matters because listeriosis, the disease the organism causes, carries hospitalisation and mortality rates that are exceptionally high among infants, the elderly, pregnant women, and immunocompromised patients. Unlike many foodborne infections that produce unpleasant but self-limiting illness, listeriosis can invade the bloodstream and central nervous system, making every point of control in the dairy chain a matter of clinical consequence.

What elevates the study beyond a routine prevalence survey is the molecular characterisation of the recovered isolates. Using polymerase chain reaction, the team screened the bacteria for five major virulence genes that govern the organism’s ability to invade and survive inside human cells. Every one of the ten isolates carried prfA, the master transcriptional regulator that switches on Listeria Pathogenicity Island 1, along with inlA, an internalin essential for breaching the intestinal barrier, and iap, a marker associated with invasion and virulence. The gene inlB, which works with inlA to drive uptake into host cells, was present in 90 percent of isolates, and hlyA, which encodes listeriolysin O, the pore-forming toxin that lets the bacterium escape the phagosome and spread cell to cell, was found in 90 percent as well. In practical terms, the strains circulating in Yazd’s raw milk carry the full genetic toolkit for invasive human disease.

One isolate lacked hlyA entirely, a detail with real diagnostic implications. Strains missing the gene for listeriolysin O are considered atypical and often non-haemolytic, meaning they fail the blood-agar tests that many laboratories rely on for routine identification. Such organisms can slip through phenotype-based screening undetected, yet they may possess alternative invasion mechanisms or acquire virulence factors through horizontal gene transfer. Their presence in the food supply is a recognised challenge for public health monitoring, because the diagnostic net designed to catch L. monocytogenes has holes exactly where these variants swim.

The antimicrobial resistance picture is more nuanced, and in some respects reassuring. The isolates showed the expected intrinsic resistance to nalidixic acid, penicillin G, ceftazidime, ceftriaxone, and cefepime, a pattern long documented in this species and the reason cephalosporins are never used to treat listeriosis. More encouragingly, all ten strains were fully susceptible to gentamicin, amikacin, levofloxacin, ciprofloxacin, vancomycin, chloramphenicol, trimethoprim-sulfamethoxazole, ampicillin-sulbactam, and erythromycin, the workhorses of clinical therapy. Resistance to tetracycline appeared in 30 percent of isolates, and imipenem showed a split profile, with half the isolates resistant and half intermediate. Twenty percent of isolates exceeded the multiple antibiotic resistance index threshold of 0.2, a value interpreted as a signature of environments with heavy antibiotic exposure, and the highest indices belonged to strains resistant to imipenem, clindamycin, and tetracycline simultaneously.

The genotyping of resistance determinants uncovered a finding that may prove the most strategically important in the entire study: several resistance genes were present in isolates that remained phenotypically susceptible. The lincosamide resistance genes lnuA and lnuB were detected in 90 and 80 percent of isolates respectively, the macrolide-lincosamide-streptogramin genes ermA and ermB in 40 and 30 percent, the aminoglycoside gene aadB in 30 percent, and the tetracycline genes tetA and tetM, which mediate efflux and ribosomal protection, in 30 percent each. Yet clindamycin susceptibility remained at 90 percent and erythromycin at 100 percent. This silent carriage of resistance genes, likely due to non-functional promoters, regulatory mutations, or the absence of environmental triggers needed for expression under laboratory conditions, means these strains hold the genetic blueprint to flip to a resistant phenotype through gene activation or horizontal transfer. Phenotypic testing alone would miss the threat entirely, which is why the authors argue that molecular surveillance must run alongside conventional susceptibility testing.

The coexistence of a complete virulence gene complement with a broad array of resistance determinants in the same small set of isolates paints a picture of strains that are both capable of causing severe disease and equipped to survive therapeutic pressure. The researchers contextualise their findings against international data: prevalence figures of 18.46 percent in South African milk samples, 28.26 percent in milk from aborted cows in Iraq, and 2.48 percent in bovine milk in Southwest China all confirm that milk is a substantial and recurring reservoir for this pathogen worldwide. Comparable genomic surveys in dairy products across India and China have likewise documented the ubiquitous presence of prfA, inlA, inlB, iap, and hlyA alongside multidrug resistance, suggesting that the Yazd findings reflect a global pattern rather than a local anomaly.

The study is not without limits, and the authors acknowledge them candidly. The low isolation rate yielded only ten confirmed strains, a sample too small to generalise precise resistance percentages across the entire province. Nevertheless, the detailed molecular characterisation provides a baseline for future large-scale monitoring in a region where such data have been scarce. The contamination of 80 percent of raw milk collection points points to hygiene failures at the earliest stage of the chain, where faecal contamination during milking, mastitic glands, and environmental reservoirs such as silage, soil, and water all offer the bacterium entry routes. The single positive from milking equipment reinforces the well-established capacity of L. monocytogenes to form resilient biofilms on food-contact surfaces, which complicates sanitation in processing facilities.

The practical message for consumers and regulators alike is clear. Pasteurisation works, and the zero detection rate in commercial pasteurised milk demonstrates that the technology, properly applied, eliminates the pathogen from the final product. The risk concentrates in raw milk, which is sometimes consumed directly or used in traditional dairy products, exposing vulnerable populations to strains that are simultaneously highly virulent and increasingly drug-resistant. The authors call for continuous monitoring of L. monocytogenes, rigorous hygiene in raw milk production, judicious antibiotic use in veterinary medicine, and routine molecular surveillance to prevent the circulation of pathogenic and resistant strains. As antimicrobial resistance continues its global advance, studies like this one demonstrate that the front line of food safety runs directly through the dairy farm, and that the tools to track the threat, from PCR screens for virulence genes to resistance indices, are already in hand.

Subject of Research: Prevalence, virulence genes, and antimicrobial resistance of Listeria monocytogenes in the dairy supply chain

Article Title: Molecular Characterisation and Antimicrobial Resistance Patterns of Listeria monocytogenes From Dairy Sources

Article References: Heidari, M. R., Shakerian, A., Chaleshtori, R. S., & Rahimi, E. (2026). Molecular Characterisation and Antimicrobial Resistance Patterns of Listeria monocytogenes From Dairy Sources. Veterinary Medicine and Science, 12(6), Article e71265. https://doi.org/10.1002/vms3.71265

Image Credits: AI Generated

DOI: 10.1002/vms3.71265

Keywords: Listeria monocytogenes, raw milk, foodborne disease, antimicrobial resistance, virulence genes, pasteurisation, dairy safety, PCR, MAR index, listeriosis, Iran, public health

The scale of the 2026 cyclosporiasis season has sharpened the urgency of that argument. According to surveillance data from the Centers for Disease Control and Prevention updated on September 1, 2026, 18,445 laboratory-confirmed domestically acquired cases were reported across 49 states and the District of Columbia between May 1 and August 31. Those infections resulted in 990 hospitalizations and two deaths, a dramatic escalation from the 1,180 cases recorded during the comparable period in 2025. Affected individuals reported no international travel during the 14 days preceding illness onset, which supports domestic foodborne exposure as the principal source of infection. As of September 3, 2026, a single outbreak cluster alone had caused 11,458 confirmed illnesses, 495 hospitalizations, and two deaths across 20 states, yet investigators emphasize that this cluster does not account for the entire national increase. The CDC and the U.S. Food and Drug Administration are continuing to investigate additional clusters for which contaminated food sources have not yet been pinpointed.

Understanding why cyclosporiasis is so difficult to control requires an appreciation of the unique biology of its causative agent, the single-celled parasite Cyclospora cayetanensis. Unlike many bacterial foodborne pathogens, Cyclospora is not transmitted directly from person to person because the parasite must spend several days to weeks in the environment before its oocysts sporulate and become infectious. Human infections therefore occur almost exclusively through ingestion of food or water contaminated with fully mature oocysts derived from human fecal waste. Contamination frequently takes place during agricultural production, through inadequately treated irrigation water, contaminated wash water, poor sanitation facilities for farm workers, or improper handling during harvesting, packaging, and processing. This environmental maturation requirement means that the parasite effectively travels through a hidden ecological reservoir before it ever reaches a consumer, which is precisely the gap that conventional human-centered surveillance cannot see into.

Over the past decade, the CDC, in collaboration with state health departments and the FDA, has significantly strengthened national cyclosporiasis surveillance through mandatory disease reporting, improved laboratory diagnostics, enhanced molecular epidemiology, and coordinated multistate outbreak investigations. These improvements have measurably increased the capacity to detect outbreaks and to monitor seasonal trends. Nevertheless, the current framework remains predominantly reactive in structure. Public health action generally begins only after infected individuals develop symptoms, seek healthcare, receive laboratory confirmation, and are linked to one another through time-consuming epidemiological investigations. While these approaches are essential for outbreak response, they provide limited opportunity to prevent transmission before contaminated food reaches consumers. Consequently, interventions such as recalls and public advisories often arrive only after substantial community exposure has already occurred, a pattern repeatedly observed during fresh-produce-associated outbreaks of the past several years.

The core of the proposed solution is food supply chain surveillance, an integrated strategy that exploits the digitalization of modern food distribution. Contemporary supply networks transport fresh produce across multiple states within a matter of days, which makes rapid traceback investigations essential during an outbreak. Emerging technologies such as blockchain-enabled traceability, digital supply chain management platforms, radio-frequency identification systems, and electronic shipment records now provide unprecedented opportunities to monitor the movement of produce from farms through processing facilities, distribution centers, retailers, restaurants, and ultimately to consumers. The researchers argue that integrating these traceability systems directly with epidemiological surveillance databases would allow investigators to reconstruct distribution pathways within hours rather than weeks, substantially reducing the time required to identify contaminated food sources, issue targeted recalls, and remove hazardous product from commerce before further exposures accumulate.

Clinical surveillance itself also requires modernization to improve the speed and sensitivity of outbreak detection. The authors call for electronic laboratory reporting to be seamlessly integrated with hospital electronic health records and state surveillance systems, enabling immediate notification of confirmed cyclosporiasis cases rather than delayed batch reporting. Syndromic surveillance systems capable of monitoring upticks in acute diarrheal illness could provide additional early warning signals before laboratory confirmation becomes available, since Cyclospora diagnosis often lags symptom onset by days or weeks. Coupling these systems with automated statistical anomaly-detection algorithms would allow public health authorities to recognize unusual disease clusters earlier and to initiate investigations before outbreaks expand across multiple jurisdictions, converting surveillance from a historical record into a genuine forecasting tool.

Molecular epidemiology is positioned as a central pillar of future cyclosporiasis surveillance. Genetic characterization of Cyclospora cayetanensis has historically been constrained by technical limitations and by the parasite’s relatively low genetic diversity, which has made it difficult to confidently link cases from different geographic areas or to distinguish outbreak-associated strains from background sporadic infections. Recent advances in molecular biology are changing that calculus. Whole-genome sequencing, multilocus sequence typing, targeted amplicon sequencing, and metagenomic approaches now have the potential to discriminate outbreak-associated strains from unrelated infections with increasing precision. When genomic data are combined with epidemiological and supply chain information, investigators gain a triangulated picture of an outbreak that can withstand the scrutiny required for regulatory action, and genomic signatures recovered from environmental and food samples can potentially be matched to clinical isolates to confirm contamination routes.

Effective implementation of a One Health surveillance framework will, however, demand unprecedented collaboration among professions and agencies that historically operate in separate silos: clinicians, epidemiologists, microbiologists, environmental scientists, agricultural specialists, food safety regulators, veterinarians, and policymakers. One of the greatest barriers to effective outbreak response remains the fragmentation of surveillance data across multiple agencies with limited interoperability. Clinical reports, laboratory findings, environmental monitoring results, genomic sequencing data, and food traceability information currently reside in disconnected systems governed by different jurisdictions and data standards. Establishing standardized national data-sharing platforms capable of integrating all of these data streams would significantly improve coordination among federal, state, and local agencies while accelerating outbreak investigations and public health decision-making. The One Health framing also extends the surveillance gaze upstream to the agricultural and environmental conditions—irrigation water quality, worker sanitation, and wildlife or wastewater contributions—that seed contamination in the first place, offering points of intervention that purely clinical systems cannot reach.

The 2026 outbreak season serves as a stark demonstration of what is at stake. A more than fifteen-fold increase in reported cases compared with the same months of the previous year, nearly a thousand hospitalizations, and two deaths occurred despite an established notifiable-disease infrastructure and experienced investigative teams at federal and state agencies. The authors contend that these outcomes are not evidence that surveillance personnel failed, but evidence that a fundamentally reactive architecture cannot keep pace with a pathogen embedded in a vast, fast-moving, and complex food production and distribution network. Their proposal reframes cyclosporiasis control as a systems problem spanning human clinical medicine, environmental science, agricultural practice, genomics, and information technology. If adopted, an integrated One Health surveillance system would aim to detect contamination signals in the environment or the supply chain before consumers are exposed, shrinking outbreak response from a matter of weeks to a matter of hours and converting a recurring public health burden into a largely preventable event.

Subject of Research: Integrated One Health surveillance for foodborne cyclosporiasis outbreaks in the United States

Article Title: An integrated One Health surveillance on cyclosporiasis outbreaks in the United States

Article References: Aborode, A. T., Allison, M. O., Akinyosoye, F. O., & Aliyu, A. A. (2026). An integrated One Health surveillance on cyclosporiasis outbreaks in the United States. New Microbes and New Infections, 73, Article 101851. https://doi.org/10.1016/j.nmni.2026.101851

Image Credits: AI Generated

DOI: 10.1016/j.nmni.2026.101851

Keywords: cyclosporiasis, Cyclospora cayetanensis, One Health, foodborne disease, surveillance, CDC, outbreak investigation, molecular epidemiology, food supply chain, whole-genome sequencing, public health, fresh produce safety

The stakes are considerable. According to the World Health Organization, 31 major foodborne hazards caused approximately 600 million cases of foodborne disease globally in 2010, resulting in 33 million disability-adjusted life years and 420,000 deaths. Diarrheal diseases account for more than half of these infections, and children are among the most vulnerable groups, with diarrhea remaining the second leading cause of child mortality worldwide. Indonesia reports the highest prevalence of diarrhea among five Southeast Asian countries at 18.21 percent, exceeding Cambodia, Myanmar, the Philippines, and Timor-Leste. Within school environments, the risks are amplified by dietary habits: evidence indicates that 98.9 percent of Indonesian school-aged children consume ready-to-eat foods, increasing their exposure to unsafe food handling practices.

The consequences of these exposures are not hypothetical. The study documents a series of recent food poisoning incidents in Indonesian schools, including cases among elementary students in East Java in 2022 after consumption of candy-shaped snacks, 2,897 poisoning cases reported in Bandar Lampung with eight-year-olds among the most affected, multiple outbreaks classified as extraordinary incidents, and an event involving roughly 30 elementary students in Sukabumi in early 2024. These episodes have been attributed largely to improper food handling and limited consumer awareness of food safety and quality, underscoring the urgency of effective school-based education.

Recognizing these gaps, a research team led by Cica Yulia of Universitas Pendidikan Indonesia, working with colleagues from institutions including Bogor Agricultural University and the National Research and Innovation Agency, conducted a comprehensive qualitative needs assessment between April and November 2025. The study was theoretically grounded in three complementary frameworks: the Health Promoting Schools framework, which integrates health education across school policy, environment, learning, and community engagement; the Theory of Planned Behavior, which links attitudes, social norms, and perceived control to behavior; and Experiential Learning Theory, which emphasizes learning through direct experience and reflection. The work was supported by a Riset Kolaborasi Indonesia 2025 grant and received ethical approval from Universitas Muhammadiyah Surakarta.

The researchers employed a qualitative exploratory design using focus group discussions and semi-structured in-depth interviews in two purposively selected regions: Bandung City in West Java Province, representing an urban setting, and Gunungkidul Regency in the Special Region of Yogyakarta, representing a rural context. Participants were recruited through purposive sampling with maximum variation, spanning regional development planning agencies, district education and health offices, food security and agriculture offices, school principals, teacher working group coordinators, nutrition experts, and curriculum specialists. Discussions lasted 90 to 120 minutes and individual interviews 45 to 60 minutes, with all sessions audio-recorded, transcribed verbatim, and analyzed using Braun and Clarke’s six-phase thematic analysis supported by NVivo 12 software.

The results paint a picture of promising but disjointed activity. Primary schools had established foundational programs, including routine canteen monitoring by health authorities, though participants noted that monitoring quality was not uniform across schools. Many schools had also embraced green economy initiatives such as school gardens, waste banks, and anti-food waste campaigns, which functioned as experiential learning platforms fostering environmental awareness. However, these activities operated largely without a standardized framework, meaning outcomes depended heavily on local leadership and resources. Food safety and nutrition content was embedded across multiple subjects, including Science, Physical Education, Environmental Education, and the Pancasila Student Profile Strengthening Projects, and teachers frequently wove hygiene and nutrition themes into thematic and project-based learning. Yet schools lacked structured modules, clear competency indicators, and assessment rubrics, producing what the authors describe as a curriculum lottery in which instructional depth varied with individual teacher initiative.

Stakeholders were candid about these deficiencies. One school principal emphasized the need for uniform guidance in the form of a dedicated food safety and nutrition module for elementary students, while another noted that annual curriculum reviews allowed adaptation to local contexts but could not compensate for the absence of standardized materials. The analysis identified three priority needs: grade-specific learning modules with explicit outcomes and assessment criteria, formal recognition of food safety and nutrition as core competencies, and behavior-oriented learning strategies grounded in experiential principles. The study also revealed strong multi-sectoral engagement, with health departments supplying pamphlets, videos, and training, and agriculture offices working with extension workers to reduce pesticide use among local food producers. Family involvement emerged as influential but inconsistent, with one teacher coordinator observing that the family role is strong but not uniform across students, highlighting the need for stronger home-school collaboration.

From this five-dimensional needs assessment, the team developed the GREENEDU NEXUS model, an operational adaptation of the whole-school food systems approach tailored to Indonesian primary schools and aligned with the Sustainable Development Goals, particularly SDGs 2, 3, and 12. The model comprises five interconnected pillars. The first, a standardized curriculum, addresses the lack of learning materials through grade-specific modules and behavioral assessment rubrics. The second, experiential learning, translates knowledge into practice through student-led canteen audits, hygiene simulations, and school food gardens. The third, safe and sustainable canteens, targets sanitation and healthy food supply via canteen certification, nutrition labeling, and local food sourcing. The fourth, green behavior and food waste reduction, promotes environmentally friendly consumption through waste banks, zero-leftover initiatives, and composting. The fifth, partnership and advocacy, formalizes cross-sectoral collaboration through parent education, local food procurement, and multi-stakeholder coordination.

The authors argue that the central challenge in Indonesia is not the absence of policy commitment but the limited institutionalization of governance mechanisms that convert national policy into coordinated implementation, monitoring, and accountability at the school level. They contrast the current situation with structured, competency-based food safety education models in Taiwan and China, which have demonstrated sustained improvements in student knowledge and behavior, and note that competency-based school health programs are most effective when curriculum standardization is paired with teacher capacity building, monitoring systems, and supportive school policies. The findings also align with World Health Organization-endorsed Health Promoting Schools frameworks, which recognize that sustainable implementation requires clearly defined governance arrangements and shared accountability across education, health, agriculture, and local government sectors.

The study’s implications extend beyond Indonesia. For policy makers, the research suggests institutionalizing food safety and nutrition education within formal curricula, teacher education, and school food governance through competency-based modules, minimum infrastructure standards, and structured coordination mechanisms. For practitioners, the message is a shift from prohibition-based approaches toward behavioral empowerment supported by enabling food environments, experiential learning, family engagement, and partnerships with local food systems. The authors acknowledge limitations: the findings are context-specific, reflect stakeholder perspectives rather than direct behavioral outcomes, and do not comprehensively explore informal food environments surrounding schools. The GREENEDU NEXUS model has not yet been piloted, and the researchers call for implementation studies using mixed-methods and longitudinal designs to evaluate its effectiveness, scalability, and long-term contribution to school-based food safety, nutrition, and public health. If subsequent trials validate the framework, it could offer a replicable template for low- and middle-income countries grappling with the same gap between food safety policy on paper and protection on the plate.

Subject of Research: Implementation gaps in school-based food safety and nutrition education in Indonesian primary schools

Article Title: Translating food safety and nutrition policy into school-based practice: Evidence from Indonesian primary schools

Article References: Yulia, C., Khomsan, A., Mariana, R. R., Iwansyah, A. C., Rosdiana, D. S., Purwaningtyas, D. R., & Sari, D. R. (2026). Translating food safety and nutrition policy into school-based practice: Evidence from Indonesian primary schools. Public Health in Practice, 12, Article 100844. https://doi.org/10.1016/j.puhip.2026.100844

Image Credits: AI Generated

DOI: 10.1016/j.puhip.2026.100844

Keywords: food safety, nutrition education, primary schools, Indonesia, foodborne disease, GREENEDU NEXUS, Health Promoting Schools, experiential learning, school canteen, green economy, public health policy, qualitative research