Ranking of the most common antimicrobial resistant phenotypes (ARP) among 540 <i>E. coli</i> from fecal samples collected from week 1 to week 6.

AMP, Ampicillin; FOX, cefoxitin; TIO, ceftiofur; CHL, chloramphenicol; GEN, gentamicin; NEO, neomycin; STR, streptomycin; COT, trimethoprim sulfamethoxazole; TET, tetracycline. 1. Ranking or percent of ARP for isolates from calves fed raw milk with the addition of sub-MICs of ceftiofur, penicillin, ampicillin, and oxytetracycline from birth to 6 weeks of age. 2. Ranking or percent of DRP for isolates from calves fed raw milk without addition of sub-MICs of antimicrobial drugs. Ranking of the most common antimicrobial resistant phenotypes (ARP) among 540 E. coli from fecal samples collected from week 1 to week 6.