MezlocillinAzlocillinPenicillinsTicarcillinCarbenicillinMicrobial Sensitivity TestsPiperacillinPseudomonas aeruginosaEnterobacteriaceaeTobramycinPenicillinaseMeningitis, ListeriaAmpicillinAminoglycosidesCephalosporinsAnti-Bacterial AgentsBacteriaCefsulodinHalf-LifePenicillin ResistancePseudomonas InfectionsAztreonambeta-Lactams