Decreasing antimicrobial resistance trends shown in FDA report

The U.S. Food and Drug Administration (FDA) on August 11 released its National Antimicrobial Resistance Monitoring System (NARMS) 2011 Executive Report, showing mostly decreasing antimicrobial resistance trends. The annual NARMS Executive Report focuses on resistance to antibiotics that are considered important in human medicine as well as multidrug resistance (described as resistance to three or more classes of antibiotics), according to the FDA.
Under the NARMS program, samples are collected from human, food producing animals and retail meat sources, and tested for certain bacteria, specifically non-typhoidal Salmonella, Campylobacter, E. coli and Enterococcus, to determine whether such bacteria are resistant to various antibiotics used in human and veterinary medicine.
Among the key findings are:


• Eighty-fivepercent of non-typhoidal Salmonella collected from humans, whichincludes Heidelberg, Hadar, Typhimurim, and Enteritidis serotypes, had noresistance to any of the antibiotics tested.  (Non-typhoidal Salmonellarefers to one of the 2,300 serotypes of Salmonella except forTyphi, Paratyphi A, Paratyphi B (tartrate negative) and Paratyphi C.)
• Duringits 16-year history, NARMS has found Salmonella resistance tociprofloxacin to be very low (less than0.5 percent in humans, less than 3 percent in retail meat, and less than 1percent in animals at slaughter).  Ciprofloxacin, one of the most common antibiotics to treatSalmonella infections in humans, belongsto a group of drugs called fluoroquinolones whichwere ceased for use in poultry in 2005.
• Multi-drugresistance in Salmonella from humans and slaughtered chickens wasthe lowest since NARMS testing began.
• Resistanceto erythromycin, the antibiotic of choice to treat Campylobacter infections,in Campylobacter jejuni (C. jejuni) has remained at less than 4percent in isolates obtained from humans, retail chicken and slaughtered chicken since testing began.
"NCC (National Chicken Council) is pleased to see many positive trends in the data including a decrease in resistance in several foodborne pathogens and that first-line antibiotics remain effective in treating illnesses," said Ashley Peterson, Ph.D., NCC vice president of scientific and regulatory affairs.  "Though this data is from 2011, this report provides a strong case that the continued judicious use of antibiotics by poultry and livestock producers is aiding in the reduction of resistance in various foodborne pathogens.
"Chicken producers, veterinarians and our animal health partners are committed to continue to preserve the effectiveness of antibiotics for both humans and animals and minimize the potential for bacteria to develop resistance.
"NCC supports FDA's Guidance #213 that is phasing-out the growth-promoting uses of those antibiotics in livestock and poultry that are used in human medicine.  We believe that this transition will continue to preserve the effectiveness of those antibiotics used to treat human illnesses.  We also support FDA's proposed Veterinary Feed Directive (VFD) that will ensure all antibiotics that are administered to food producing animals will be done so under the prescription of a licensed veterinarian.  Both of these actions by FDA and full cooperation by chicken producers and animal health companies will help continue to drive the decrease in resistance in foodborne pathogens.
"One thing consumers should remember is that all pathogens potentially found on raw chicken, regardless of strain or resistance profile, will be fully destroyed by handling the product properly and cooking it to an internal temperature of 165F."