ristocetin and Endocarditis--Bacterial

MDL 62,873 is an amide derivative of teicoplanin A2-2. Like those of natural glycopeptides, its antibacterial activity is mediated by inhibition of cell wall peptidoglycan synthesis. Against streptococci and enterococci, the in vitro activity of MDL 62,873 was similar to that of teicoplanin and greater than that of vancomycin. Against staphylococci, it has activity similar to that of vancomycin, and it was significantly more active than teicoplanin against coagulase-negative isolates. Like teicoplanin and vancomycin, MDL 62,873 had slow but significant bactericidal activity (99 to 99.9% killing in 24 h) against staphylococci at concentrations near the MIC. In murine septicemia studies with Staphylococcus aureus, Streptococcus pyogenes, and Streptococcus pneumoniae, the 50% effective doses were lower than those of vancomycin. In staphylococcal endocarditis in rats, MDL 62,873 at 20 mg/kg of body weight and vancomycin at 40 mg/kg, both doses given intravenously twice daily, had similar efficacies in reducing the heart bacterial load. These results probably reflect the longer half-life of MDL 62,873, which has a pharmacokinetic profile in rats similar to that of teicoplanin.

Topics: Animals; Anti-Bacterial Agents; Bacteria; Bacterial Infections; Endocarditis, Bacterial; Glycopeptides; Half-Life; Male; Mice; Microbial Sensitivity Tests; Rats; Ristocetin; Sepsis; Staphylococcus; Teicoplanin

Topics: Amphotericin B; Anti-Bacterial Agents; Chloramphenicol; Colistin; Drug Resistance; Drug Resistance, Microbial; Endocarditis; Endocarditis, Bacterial; Enterobacter aerogenes; Enterobacteriaceae; Erythromycin; Escherichia coli Infections; Kanamycin; Penicillin G; Penicillins; Proteus Infections; Pseudomonas Infections; Ristocetin; Staphylococcal Infections; Streptococcal Infections; Streptomycin; Tetracycline; Vancomycin

Topics: Diagnosis; Endocarditis; Endocarditis, Bacterial; Endocarditis, Subacute Bacterial; Heart Failure; Humans; Intracranial Embolism; Intracranial Embolism and Thrombosis; Methicillin; Mortality; Oxacillin; Penicillins; Ristocetin; Streptomycin; Vancomycin

Topics: Anti-Bacterial Agents; Antibiotics, Antitubercular; Drug Therapy; Endocarditis; Endocarditis, Bacterial; Endocarditis, Subacute Bacterial; Humans; Ristocetin

Topics: Anti-Bacterial Agents; Anuria; Brain Abscess; Cholangitis; Dermatitis, Exfoliative; Drug Therapy; Endocarditis; Endocarditis, Bacterial; Humans; Liver Abscess; Meningitis; Meningoencephalitis; Peritonitis; Pneumonia; Pneumonia, Viral; Ristocetin; Sepsis; Staphylococcal Infections; Toxicology; Typhoid Fever

Topics: Anti-Bacterial Agents; Ascorbic Acid; Blood; Blood Protein Electrophoresis; Blood Proteins; Drug Therapy; Endocarditis; Endocarditis, Bacterial; Humans; Meningitis; Meningoencephalitis; Oximetry; Peritonitis; Ristocetin; Sepsis; Urine

Topics: Endocarditis; Endocarditis, Bacterial; Humans; Ristocetin

Topics: Anti-Bacterial Agents; Endocarditis; Endocarditis, Bacterial; Ristocetin

Topics: Anti-Bacterial Agents; Endocarditis; Endocarditis, Bacterial; Ristocetin; Staphylococcal Infections