ampicillin and cephalosporin ( 86 % cefuroxime ) consumptions were inversely related , which probably explained the paradox that cephalosporin use ( and therefore less ampicillin use ) was negatively correlated with the carriage of klebsiella spp strains resistant to ampicillin , cefuroxime , and cephalexin .
C3536856
cephalosporin
C0007562
cefuroxime