Cefotetanbeta-LactamasesPenicillinaseSonicationAnti-Bacterial AgentsMicrobial Sensitivity TestsCephamycinsCefmetazoleNeisseria gonorrhoeaeDrug Resistance, BacterialCefoxitinAntibiotic ProphylaxisCefoperazoneBacteriaBacteroides fragilisColorectal Surgerybeta-LactamsDrug Resistance, MicrobialCephalosporinsbeta-Lactam ResistanceEnterobacteriaceaeBacteria, AnaerobicPenicillin ResistanceCarbapenemsCefazolinEscherichia coliStreptomycesKlebsiella pneumoniae