gram +ve
spherical cocci
arranged in cluster (grape-like)
catalase +ve
opaque,pigmented colonies
staphylocoagulase
extracellular pt (fibronogen>fibrin)fibrin-for protection from immunology -localization of disease
clumping factor
fibrogen-binding proteinimportant adhesinleads to traumatized tissue and blood clot
invasins
leucocidin-acts on PMN & macrocytestaphylokinase & hyaluronidase-dessiminase
protein A
combines with non-specifically with Fc-portion of IgGinhibit opsonization
haemolysin
exotoxins
facultative anaerobeusually grows in simple nutrient media
blood agar : golden yellow
beta haemolysi (complete)
selective indicator mannitol
can tolerate high conc. of NaClferments mannitol