CefamandoleMandelic AcidsCephalosporinsCephalothinCefazolinCefoxitinCephapirinMicrobial Sensitivity TestsCephalosporinaseEnterobacteriaceaeCefonicidCefuroximePenicillin ResistanceCephaloridineAnti-Bacterial AgentsAmpicillinBacteriaMethicillinDrug Resistance, MicrobialCarbenicillinCephamycinsMoxalactamCephalexinPremedicationCefoperazoneHypoprothrombinemiasStaphylococcusEnterobacterTobramycinSpecies SpecificityProteusHalf-LifeSarcinaPenicillinaseStaphylococcus aureusSequence Analysis, DNACulture MediaCefotaximebeta-LactamasesStaphylococcus epidermidisPenicillinsEscherichia coliTicarcillinRNA, Ribosomal, 16SHaemophilus influenzaeCefaclorMice, Inbred StrainsGram-Negative Aerobic Bacteria