31:865-869 , 1987 ) , we reported that many of the 7-aminothiazolyl cephalosporins , such as cefmenoxime , showed paradoxically reduced activity against proteus vulgaris at higher concentrations , whereas these paradoxical effects were not observed for other types of cephalosporins , such as cefbuperazone and cefoperazone .
C3536856
cephalosporins
C0007552
cefoperazone