General Information: Staphylococcus haemolyticus JCSC1435 was isolated from a Japanese inpatient at Juntendo Hospital, Tokyo, in 2000. This strain is a highly resistant strain which has been shown to generate spontaneous antibiotic sensitive mutants. Causes opportunistic infections in humans. 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. Staphylococcus haemolyticus was originally isolated from human skin and traditionally considered to be a nonpathogenic commensal. Recently this organism has been recognized as a pathogen in animals and humans. It is known to be involved in opportunistic infections associated with the implantation of foreign bodies, paticularly in those with compromised immune systems. Resistance to multiple antibiotics has been observed in clinical isolates and it is possible S. haemolyticus could serve a donor or resistance genes to other more virulent staphlococci.