The genus Enterococus is mainly related to the “streptococci of fecal origin” or “enterococci”.

Taxonomy
Family: Enterococcaceae / Group D Streptococcus Lancefield

Natural habitats.
They are widespread in nature and can be found in soil, plants, water, food and animals.

In humans, they are predominantly inhabitants of the gastrointestinal tract and are less commonly found in other sites, such as in the genitourinary tract, the oral cavity, and skin.

Enterococci are considered the most abundant gram positive cocci colonizing the intestine, with E. faecalis being one of the most common bacteria isolated from this site.

Other species, such as E. faecium, E. casseliflavus, E. durans, E. gallinarum and E. avium, are also found in variable proportions in the gastrointestinal tract of humans.

Clinical significance
Enterococcus avium is a rare infections in humans, only a few reported cases are known.
in such cases, E. avium may be vanco-resistant.