Prevalence and antimicrobial resistance profile of Campylobacter isolated from conventional and antibiotic free swine farms in three geographic locations

The prevalence and antimicrobial resistance of Campylobacter were examined from swine reared in conventional and antimicrobial-free (ABF) production systems in three geographical locations: North Carolina (NC), Ohio (OH) and Wisconsin (WI). Methods: A total of 1500 pigs and 1930 carcass swab samples were evaluated for the prevalence of Campylobacter. Fecal samples from 662 pigs from NC (370 conventional farms and 292 ABF farms), 379 from OH (268 conventional and 111 ABF) and 459 from WI (160 conventional and 299 ABF) were included. Antimicrobial susceptibility testing was performed using agar dilution method against a panel of six antimicrobials