''Streptococcus equisimilis'' is a species of ''

Streptococcus ''Streptococcus'' is a genus of gram-positive ' (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occu ...

'', initially described by Frost in 1936. As a result of several DNA hybridization studies in 1983, the species was merged into ''

Streptococcus dysgalactiae ''Streptococcus dysgalactiae'' is a gram positive, beta-haemolytic, coccal bacterium belonging to the family '' Streptococcaceae''. It is capable of infecting both humans and animals, but is most frequently encountered as a commensal of the al ...

''. Subsequently, ''S.dysgalactiae'' was divided into the subspecies '' Streptococcus dysgalactiae subspecies equisimilis'' and ''

Streptococcus dysgalactiae subspecies dysgalactiae ''Streptococcus'' is a genus of gram-positive ' (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occu ...

''. Although the name ''Streptococcus equisimilis'' is no longer valid, it is still encountered both in clinical practice, and in scientific journals.

References

Streptococcaceae Obsolete bacteria taxa {{lactobacilli-stub