Susceptibility of Eikenella corrodens to ten cephalosporins

The susceptibility of 24 strains of Eikenella corrodens was determined, by the agar dilution technique, to 10 cephalosporins, as well as to clindamycin, penicillin and dicloxacillin. All strains were uniformly very susceptible to penicillin G and cefoxitin and resistant to clindamycin and dicloxacillin. Cefazolin showed good activity. Cephalexin, cephradine, and cefadroxil showed poor activity, and cefamandole's activity was relatively poor. Cephalothin, cephapirin, cefaclor, and cephaloridine showed moderate activity, with some strains relatively resistant.