Moxifloxacin

A fourth-generation synthetic fluoroquinolone, broad-spectrum antibacterial agent that is active against both Gram-positive and Gram-negative bacteria; inhibits DNA gyrase and topoisomerase IV.Bacterial Infection Approved (In Vitro) :The in vitro activities of Moxifloxacin and Amoxicillin are compared by time-kill curve and inhibition of intracellular growth experiments by using a model of bone marrow-derived mouse macrophages infected by L. monocytogenes EGDe. Moxifloxacin acts much more rapidly, beginning to exert its effects in the first 3 h and achieving complete broth sterilization within 24 h of incubation. Moxifloxacin appears to have a protective effect against macrophage lysis, as many cells are still viable after 24 h of incubation. (In Vivo) :Moxifloxacin (12 mg/kg; intravenous injection; once-three times per day; for 7 days; white male Wistar rats) treatment every 8 hours is accompanied by longer survival. Tissue cultures 30 hours after bacterial challenge shows considerably less bacterial overgrowth in the spleens and lungs of moxifloxacin-treated than in salinetreated animals and without being toxic.