beta-LactamasesEnterobacteriaceae InfectionsKlebsiella pneumoniaebeta-Lactam ResistanceEnterobacteriaceaeKlebsiella InfectionsMicrobial Sensitivity TestsAnti-Bacterial AgentsCephalosporin Resistancebeta-LactamsMacauDrug Resistance, Multiple, BacterialCephalosporinsSerratia InfectionsGram-Negative BacteriaCeftazidimeEscherichia coli InfectionsGram-Negative Bacterial InfectionsCefotaximeCross InfectionEnterobacter cloacaeEscherichia coliDrug Resistance, BacterialIndiaBacteremiaHospitalsInterleukin-1betaElectrophoresis, Gel, Pulsed-Fieldbeta 2-Microglobulin