Abstract: |
The genus Enterococcus comprises over 50 species that can be found in diverse environments, from the soil to the gastrointestinal (GI) tract of animals and humans to the hospital environment (1, 2). The first member of this Gram-positive genus was isolated in 1899 from a lethal case of endocarditis (3, 4). It was not until 1984 that enterococcal species were seen as genetically distinct from Streptococcus and assigned their own genus (3 - 5). Enterococci are Gram-positive facultative anaerobes that exist in chains or °C, hydrolyze esculin in the presence of 40% bile salts, and are catalase negative (6, 7). Enterococcal species can be distinguished by phenotypic tests that rely on strains’ ability to form acid in mannitol and sorbose broth and to hydrolyze arginine (8, 9). © 2018 American Society for Microbiology, Washington, DC. |