title: Influence of ceftriaxone on natural defense systems.
abstract: The in vitro and in vivo effects of ceftriaxone, a newly developed cephalosporin, on phagocytes and T-cell subsets were studied. Ceftriaxone in vitro did not interfere with phagocytosis, phagocytosis-dependent metabolic activation, and microbicidal activity (against Staphylococcus aureus and Candida albicans) of human neutrophils at doses ranging from 10 to 320 micrograms/ml. In vitro chemotaxis was markedly inhibited both in the presence of and after 30 minutes of exposure to 40 micrograms/ml of ceftriaxone. Six normal adult volunteers were given 2 g of antibiotic intravenously every 24 hours for six days. The in vivo effects of ceftriaxone on neutrophil functions and T-cell subsets were investigated before and 30 minutes after injection on the first and third days. No change in any phagocyte function (chemotaxis, phagocytosis, phagocytosis-dependent metabolic activation, and microbicidal activity) or in the distribution of T-cell subpopulations was observed.
mesh_terms: D002439:Cefotaxime / Q000031:analogs & derivatives* / Q000494:pharmacology; D002443:Ceftriaxone; D002634:Chemotaxis, Leukocyte / Q000187:drug effects; D006801:Humans; D007113:Immunity, Innate / Q000187:drug effects; D066298:In Vitro Techniques; D009504:Neutrophils / Q000187:drug effects; D010586:Phagocytes / Q000187:drug effects*; D010587:Phagocytosis / Q000187:drug effects; D013601:T-Lymphocytes / Q000145:classification / Q000187:drug effects*
chemical_list: D002443:Ceftriaxone; D002439:Cefotaxime