More Cases of Foodborne Bacteria Resistant to Drugs

From 2011 to 2013, multidrug resistance of a certain Salmonella strain more than doubled.

HealthDay News — Antibiotic-resistant infections from foodborne germs still cause about 440,000 illnesses in the United States each year, the U.S. Centers for Disease Control and Prevention reported Tuesday.

For the current report, the CDC investigators tested more than 5,000 foodborne bacteria from affected people and compared them with findings from previous years.

The investigators found that multidrug resistance in a common strain of Salmonella called I4,[5],12:i:- rose from 18% in 2011 to 46% in 2013. Illness with this strain of Salmonella has been linked to animal exposure and consumption of contaminated pork or beef.

 Another foodborne bacteria monitored for drug resistance is Campylobacter. In 2013, one-quarter of Campylobacter samples from infected people were resistant to quinolone antibiotics such as ciprofloxacin, the agency said.

To curb drug-resistant infections, efforts are being made to reduce inappropriate use of antibiotics in food-producing animals. Measuring the success of those efforts, the CDC’s National Antimicrobial Resistance Monitoring System each year tracks changes in the antibiotic resistance of six common types of foodborne bacteria found in food animals, retail meats, and affected humans.


  1. Centers for Disease Control and Prevention. The 2013 NARMS Annual Human Isolates Report. Accessed 10 June 2015. Available at