the antibacterial effect of penicillin against klebsiella spp . was found to be poor , while those of oral cephem antibiotics , cephalexin ( cex ) , cefaclor ( ccl ) , and cefazolin ( cez ) which is the cephem antibiotics of the so-called first generation and cefotiam ( ctm ) among other cephem antibiotics of the so-called second generation were relatively good .
C0279516
antibacterial
C0007537
cefaclor