NCIt definition : A species of facultatively anaerobic, Gram positive, cocci shaped bacteria in the
phylum Firmicutes. This species is positive for Lancefield group D and esculin hydrolysis
and negative for catalase, arginine deaminase, growth in 6.5% NaCl and pyrrolidonylarylamidase.
It can ferment trehalose but not mannitol, melibiose or sorbitol. S. equinus is commensal
in many animals and can be a human pathogen that causes a variety of opportunistic
infections.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Streptococcus equinus.;