the most common transmissible r factor determined resistance to ampicillin , amoxicillin , and sulfanilamide ( 30 % ) , followed by resistance to ampicillin and amoxicillin ( 13 % ) and resistance to ampicillin , amoxicillin , phosphomycin , and sulfanilamide ( 9 % ) .
C0002680
ampicillin
C0002645
amoxicillin