Resenha
Activity of daptomycin and selected antimicrobial agents tested against Staphylococcus aureus from patients with bloodstream infections hospitalized in European medical centers
Fecha
2008-02-01Registro en:
Journal Of Chemotherapy. Florence: Esift Srl, v. 20, n. 1, p. 28-32, 2008.
1120-009X
WOS:000254066100003
Autor
Sader, Helio Silva [UNIFESP]
Watters, A. A.
Fritsche, T. R.
Jones, R. N.
Institución
Resumen
Daptomycin is a cyclic lipopeptide with potent bactericidal activity against Gram-positive organisms and has been approved by the United States Food and Drug Administration for the treatment of Staphylococcus aureus bacteremia and infectious endocarditis (right-side). We evaluated the activity of daptomycin against bloodstream infection S. aureus strains from 4,799 patients hospitalized in 32 medical centers (12 European countries, Turkey and Israel) with bloodstream infections (BSI) during a 5-year period (2002-2006). Intravenous catheters were the source of infection in 15% of cases, and those strains were analyzed separately. All strains were susceptibility tested by reference broth microdilution methods utilizing calcium supplementation (50 mg/L) when testing daptomycin. Bactericidal activity of daptomycin and vancomycin were evaluated against a subset of 50 randomly selected strains. Daptomycin (MIC (50/90), 0.25/0.5 mg/L), vancomycin (MIC50/90, 1/1 mg/L), and linezolid (MIC50/90, 2/2 mg/L), were highly active (>99.9% susceptibility) against the strains evaluated; and daptomycin was the most potent (lowest MIC90) among these compounds. Resistance rates to oxacillin and levofloxacin were generally elevated, especially when an intravenous catheter was the source of infection.