''Streptococcus dysgalactiae'' subsp. ''equisimilis'' is a species of ''

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

'', initially described by Frost in 1936. As a result of several

DNA hybridization In molecular biology, hybridization (or hybridisation) is a phenomenon in which single-stranded deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) molecules anneal to complementary DNA or RNA. Though a double-stranded DNA sequence is generally ...

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 alim ...

''. Subsequently, ''S. dysgalactiae'' was divided into the subspecies ''Streptococcus dysgalactiae'' subsp. ''equisimilis'' and ''Streptococcus dysgalactiae'' subsp. ''dysgalactiae''. Although the name ''Streptococcus equisimilis'' is no longer valid, it is still encountered both in clinical practice, and in scientific journals.

References

Streptococcaceae {{lactobacilli-stub