Enterococcus faecalis is a type of bacteria commonly found in the intestines of humans and animals. It is part of the normal gut flora, helping with digestion and maintaining a healthy balance of microorganisms. However, it can also cause infections, particularly in people with weakened immune systems. This bacterium is known for its ability to survive in harsh environments, including high salt concentrations and extreme temperatures. Enterococcus faecalis is often associated with hospital-acquired infections, such as urinary tract infections and endocarditis, making it a significant concern in healthcare settings.