Washington D.C. – In the first national study of the prevalence of antibiotic-resistant Acinetobacter baumannii infections in children across the US, researchers from Center for Disease Dynamics, Economics, & Policy (CDDEP) in Washington, DC and Rush University in Chicago, IL examined national and regional trends of antibiotic resistance in clinical specimens over a 13-year period. While there was an overall increase between 1999 and 2012 in the proportion of isolates of A. baumannii that were resistant to cephalosporin and carbapenem, the authors noted a slight decline after a peak in 2008. The decrease may be attributable to a combination of antibiotic stewardship guidelines released in 2007 and infection control guidance specifically designed to combat multi-drug resistant A. baumannii in healthcare settings.
Infections caused by drug-susceptible A. baumannii are difficult to treat and the emergence of resistance has made treatment even more challenging. Highly resistant A. baumannii infections are increasingly being reported worldwide.
The study found that the crude proportion of cephalosporin-resistant A. baumannii increased from 13.2% in 1999 to 23.4% in 2012, whereas the proportion of carbapenem-resistant A. baumannii increased from 0.6% in 1999 to 6.1% in 2012. From 1999 to 2012, the proportion of cephalosporin-resistant and carbapenem-resistant A. baumannii increased each year by 3% and 8%, respectively; however, after 2008, a downward trend was observed, but resistance remained higher than was observed in 1999.
"Acinetobacter are bacteria known to cause serious infections that are notoriously difficult to treat because of growing antibiotic resistance," according to Dr. Latania K. Logan of Rush University Medical Center. "The bacteria survive for long periods in the environment. Further studies are needed to assess the most effective prevention strategies in children, who are particularly vulnerable to A. baumannii."
"It is encouraging to see a downtrend after 2008, but we need to continue to monitor resistance trends," said study co-author Dr. Sumanth Gandra of CDDEP. "The lack of new drugs to treat Acinetobacter remains a concern," he said.
About the Center for Disease Dynamics, Economics & Policy
The Center for Disease Dynamics, Economics & Policy (CDDEP) produces independent, multidisciplinary research to advance the health and wellbeing of human populations around the world. CDDEP projects are global in scope, spanning Africa, Asia, and North America and include scientific studies and policy engagement. The CDDEP team is experienced in addressing country-specific and regional issues, as well as the local and global aspects of global challenges, such as antibiotic resistance and pandemic influenza. CDDEP research is notable for innovative approaches to design and analysis, which are shared widely through publications, presentations and web-based programs. CDDEP has offices in Washington, D.C. and New Delhi and relies on a distinguished team of scientists, public health experts, and economists.
Article: Acinetobacter baumannii Resistance Trends in Children in the United States, 1999-2012. Journal of the Pediatric Infectious Disease Society Latania K Logan, Sumanth Gandra, Anna Trett, Robert A Weinstein, Ramanan Laxminarayan
Journal of the Pediatric Infectious Diseases Society, piy018, https://doi.org/10.1093/jpids/piy018
Published: 22 March 2018 https://academic.oup.com/jpids/advance-article/doi/10.1093/jpids/piy018/4951523?guestAccessKey=15e69dc8-c1a4-4ee3-ad69-0a31ea5103d8