Detection of virulence genes among Staphylococcus saprophyticus isolated from women with urinary tract infections: first report from Iran

Abstract

AbstractObjectiveThe purpose of the present study was to investigate the biofilm production, and the presence of virulence genes and biochemical characteristics among theS. saprophyticusclinical isolates. A total of 35 clinical isolates ofS. saprophyticuswere collected from patients referred to several hospitals. By the crystal violet staining method, the capability of biofilm formation was performed. The genes associated with surface ofS. saprophyticuswere investigated by the PCR-sequencing techniques. Hemagglutination and lipase activity assays were also performed.ResultsThe results of crystal violet staining assay showed that 32 isolates (91%) form biofilm. Moreover, seven (20%), 13 (37%), and 12(34%) isolates were categorized as weak, moderate, and strong biofilm producers, respectively. virulence genes including UafA, Aas and Ssp had an overall prevalence of 88%, 91% and 80%, respectively. None of the isolates exhibited lipolytic activities. Regarding hemagglutination properties, only 11 (31%) isolates demonstrated hemagglutination of sheep erythrocytes. The results of this study indicate a high prevalence of UafA and Aas genes that can enhance the pathogenicity ofS. saprophyticus, and Identification and better understanding of the functions of these genes can be used for therapeutic purposes. Maybe in the future we will be switch to anti-adhesion therapy because of drug resistance.