prevalence and antimicrobial resistance profile of campylobacter spp. isolated from conventional and antimicrobial-free swine production systems from different u.s. regions. | we conducted a study to compare the prevalence and antimicrobial resistance profile of campylobacter isolated from 34 farm-slaughter pair cohorts of pigs raised in conventional and antimicrobial-free (abf) production systems. isolates originated from four different states of two geographic regions (region 1--ohio and michigan; region 2--wisconsin and iowa). a total of 838 fecal and 1173 carcass samples were examined. campylobacter isolates were speciated using multiplex polymerase chain reaction ... | 2010 | 21133777 |