CefoxitinCephamycinsBacteroides fragilisCephalosporinsCefotetanCephalothinMicrobial Sensitivity TestsCefmetazoleMoxalactamAnti-Bacterial AgentsCephalosporinasebeta-LactamasesCefamandoleBacteria, Anaerobicbeta-LactamsBacteroidesOxacillinCefotaximeCefoperazoneBacteroides InfectionsEnterobacteriaceaeDrug Resistance, MicrobialCeftizoximeClindamycinProbenecidImipenemLactamsEnterobacterBacterial InfectionsPremedicationProteusKlebsiellaKlebsiella pneumoniaeBacteriaFusobacteriumTicarcillinMetronidazoleMethicillin ResistanceCephalosporin ResistanceCefazolinPenicillinsFormularies, HospitalPenicillanic AcidPenicillin-Binding ProteinsDisk Diffusion Antimicrobial TestsClavulanic AcidsPenicillinasebeta-Lactam ResistancePiperacillinHospital Bed Capacity, 500 and overProteus vulgaris