Enterococci is a genus of lactic acid bacteria .Enterococci are Gram -positive cocci, facultative anaerobic organisms. Common commensal organisms in the intestines of humans are E. faecalis and E. faecium. Enterococci can be used as indicators of faecal contamination. They have been implicated in outbreaks of foodborne illness, and they have been ascribed a beneficial or detrimental role in foods.