General Information: The original ATCC isolate was from a human urine specimen. Commensal Staphylococcal species that can cause acute urinary tract infections. Staphylcocci are generally found inhabiting the skin and mucous membranes of mammals and birds. Some members of this genus can be found as human commensals and these are generally believed to have the greatest pathogenic potential in opportunistic infections. This organism, normally a commensal on human skin and mucous membranes, is now the second most common cause of acute urinary tract infections after Escherichia coli. It often causes uncomplicated urinary tract infections (UTI) in female outpatients.