50 to 90 % of infections caused by organisms resistant to presently available cephalosporins , such as enterobacter species , proteus vulgaris , providencia species , morganella morganii , serratia species , pseudomonas aeruginosa , and bacteroides fragilis responded satisfactorily to cefoperazone .
C3536856
cephalosporins
C0007552
cefoperazone