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 individuals with weakened immune systems. This bacterium is known for its ability to survive in harsh environments, including high salt concentrations and extreme temperatures. Infections caused by Enterococcus faecalis can lead to serious health issues, such as urinary tract infections and endocarditis, especially in hospitalized patients or those with underlying health conditions.