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  • Title: Microbiologic characterization of isolates from a dalbavancin clinical trial for catheter-related bloodstream infections.
    Author: Goldstein BP, Jones RN, Fritsche TR, Biedenbach DJ.
    Journal: Diagn Microbiol Infect Dis; 2006 Feb; 54(2):83-7. PubMed ID: 16458124.
    Abstract:
    Dalbavancin, a new-generation semisynthetic lipoglycopeptide in phase 3 clinical development, has been documented to be more active than vancomycin or teicoplanin against Gram-positive bacteria, including multidrug-resistant strains, by in vitro testing and in animal models. The human pharmacokinetics of dalbavancin predicts efficacy at weekly dosing intervals. In a phase 2 open-label clinical trial, dalbavancin exhibited superiority when compared with vancomycin against catheter-related bloodstream infection (CR-BSI). The majority of pathogens identified in this study as in clinical practice were coagulase-negative staphylococci (CoNS), necessitating rigorous characterization of duplicate isolates to rule out contaminants and to validate cases for study evaluations. At follow-up for the intent-to-treat population, overall pathogen eradication was 92.3% for dalbavancin and 75.9% for vancomycin. We describe the details of organisms isolated, their epidemiologic/genetic characterization, susceptibility patterns against glycopeptides, and the eradication rates by organism group. In conclusion, dalbavancin was active against all isolated pathogens associated with CR-BSI (CoNS, Staphylococcus aureus and Enterococcus faecalis; all MIC results, < or = 0.25 microg/mL) and achieved significant (P < 0.05) clinical success when compared with vancomycin.
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