<Tr> <Th_colspan="2"> Binomial name </Th> </Tr> <Tr> <Td_colspan="2"> Enterococcus faecalis (Andrewes and Horder, 1906) Schleifer and Kilpper - Bälz, 1984 </Td> </Tr> <P> Enterococcus faecalis--formerly classified as part of the group D Streptococcus system--is a Gram - positive, commensal bacterium inhabiting the gastrointestinal tracts of humans and other mammals . Like other species in the genus Enterococcus, E. faecalis can cause life - threatening infections in humans, especially in the nosocomial (hospital) environment, where the naturally high levels of antibiotic resistance found in E. faecalis contribute to its pathogenicity . E. faecalis has been frequently found in root canal - treated teeth in prevalence values ranging from 30% to 90% of the cases . Root canal - treated teeth are about nine times more likely to harbor E. faecalis than cases of primary infections . </P> <P> E. faecalis is a nonmotile microbe; it ferments glucose without gas production, and does not produce a catalase reaction with hydrogen peroxide . It can produce a pseudocatalase reaction if grown on blood agar . The reaction is usually weak . It produces a reduction of litmus milk, but does not liquefy gelatin . It shows consistent growth throughout nutrient broth which is consistent with being an Facultative anaerobe . They catabolize a variety of energy sources including glycerol, lactate, malate, citrate, arginine, agmatine, and many keto acids . Enterococci survive very harsh environments including extremely alkaline pH (9.6) and salt concentrations . They resist bile salts, detergents, heavy metals, ethanol, azide, and desiccation . They can grow in the range of 10 to 45 ° C and survive at temperatures of 60 ° C for 30 min . </P>

Where is enterococcus faecalis found in the body
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