Enterococci are part of the normal intestinal flora of humans and animals but are also important pathogens responsible
for serious infections. The genus
Enterococcus includes more than 17 species, but only a few cause clinical infections in humans. With increasing antibiotic resistance, enterococci are recognized as feared nosocomial pathogens that can be challenging to treat.
Enterococcus species are hardy, facultative anaerobic organisms that can survive and grow in many environments.