Corynebacterium striatum, a normal constituent of the skin flora, is r
arely pathogenic, Previous reports of infection are few, and are mainl
y confined to immunosuppressed patients or those with indwelling prost
hetic devices. We report a case in which the organism caused a recurre
nt breast abscess in a woman with normal immune function, The only pre
vious reports of Corynebacterium striatum mastitis have been in cows.