On a positive note, NARMS found that multidrug resistance--when a person resists three or more classes of antibiotics--in Salmonella has seen little change, still accounting for 10 percent of foodborne infections. However, some types of Salmonella are seeing more resistance than in the past.

New data shows that in 2013, multidrug resistance in a common Salmonella serotype called I4,[5],12:i:- was 46 percent. This is double the rate that was reported in 2011. Also, resistance in this serotype to four drugs (ampicillin, streptomycin, sulfonamides, and tetracycline) rose from 18 percent in 2011 to 46 percent in 2013. Individuals infected with this particular serotype typically get it from animal exposure, or by consuming certain pork or beef products--likely from live animal markets.

Testing for Campylobacter showed the a quarter of samples taken from sick persons were resistant to quinolones like ciprofloxacin--similar to the rate reported in 2011.

The White House is currently in talks with the food and agriculture industries to curb use of antibiotics in livestock, overuse of which is becoming ineffective--the exact purpose of NARMS’s study.