both cephalosporins were similar with respect to their antimicrobial activity against the k. pneumoniae in vitro , but they differed in their degree of protein binding , being 34 % for cefoxitin and 89 to 93 % for cefazolin in uninfected rats and 24 and 71 to 83 % , respectively , in infected rats .
C3536856
cephalosporins
C0007557
cefoxitin