The levels of multidrug resistant strains of salmonella in raw chicken and turkey products that consumers purchase at the grocery store have declined since 2011, the FDA said Thursday in a report based on samples taken from January 2014 to June 2015. Twenty percent of the chicken the agency tested contained salmonella resistant to more than one antibiotic, compared to 45 percent in 2011, while the rate of antibiotic resistant bacteria in turkey has fallen from 50 percent to 36 percent during the same time frame. Overall, prevalence of salmonella in retail poultry is at its lowest level since testing began in 2002.