Methods for identifying novel dosing regimens

Abstract

Methods of treating a Gram negative bacterial infection comprising a co-administration regimen of an effective amount of fosfomycin together with at least one antimicrobial agent selected from the group consisting of piperacillin-tazobactam, ceftazidime and meropenem to an infected subject. A further method of treating a subject with a bacterial infection that includes infection with a 'resistant' mutant subpopulation selected from the group consisting ofand, the method comprising (a) obtaining a sample from a subject suffering from a bacterial infection; (b) identifying the presence of the 'resistant' mutant subpopulation in said sample; and (c) co-administering fosfomycin and at least one antimicrobial agent to the subject, wherein after the co-administration, the bacterial density is effectively reduced and the “resistant” mutant subpopulation is inhibited.