UreohydrolasesClavulanic AcidClavulanic AcidsAmoxicillin-Potassium Clavulanate CombinationTicarcillinAmoxicillinbeta-LactamasesSulbactamPenicillanic Acidbeta-LactamsCephamycinsAnti-Bacterial AgentsStreptomycesMicrobial Sensitivity TestsPenicillinsLactamsCephalosporinasebeta-Lactam ResistancePenicillinaseIsoelectric FocusingDrug CombinationsCephalosporinsPiperacillinThienamycinsAmpicillin