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Memorias del Instituto de Investigaciones en Ciencias de la Salud

versão On-line ISSN 1812-9528

Resumo

FARINA, N et al. Staphylococcus saprophyticus as urinary pathogen. Mem. Inst. Investig. Cienc. Salud [online]. 2005, vol.3, n.1, pp.31-33. ISSN 1812-9528.

Staphylococcus saprophyticus(Ssa), a coagulase negative staphylococcus, causes urinary tract infection and is predominant in sexually active young women. Ssa is the second most frequent pathogen in this population after Escherichia coli. The objective of this study was to determine the frequency of Ssa isolates in sexually active women and to evaluate the sensibility to antimicrobial agents. From June 2001 to June 2003, coagulase negative Staphylococcus strains were isolated from urine culture in women with ages ranging from 15 to 50 years. The presumptive identification was determined by a disc susceptibility to novobiocin (5 mcg). The confirmation was performed by xylose, mannose, arabinose and saccharose fermentation. The sensibility to antimicrobial agents was determined by standardised guidelines of NCCLS. From 610 urine cultures, 50 Ssa strains were isolated and the prevalence was 8.2%. All strains were susceptible to gentamicin, norfloxacin, oxacillin, cephalothin, nitrofurantoin and vancomycin. Ninety eight percent was susceptible to penicillin and trimethoprim-sulphamethoxazole. The results of frequency and sensibility were similar to those reported previously. Novobiocin disc test is very useful to identify Ssa because novobiocin resistant staphylococci different from Ssa are rarely found in human clinic samples.

Palavras-chave : Staphylococcus saprophyticus; Urinary tract infections; Women.

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