Distribution of the phenotypic resistance patterns of the 453 feces, 174 digesta, and 158 mucosa multi-resistant E. coli isolates.

Multi- resistance was defined as resistance against at last three classes of antimicrobials. The distribution was analyzed for the different habitats (feces, digesta, mucosa) and sampling time points (24, 38, 52 days of age) for both feeding groups of the zinc pig feeding trial.