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Streptococcus dysgalactiae subspecies equisimilis is a commensal in human alimentary tract and genital tract. Occasionally it is isolated from skin, but usually in relation to a chronic skin condition or some breach of the epithelial barrier.
Subsequently, S. dysgalactiae was divided into the subspecies Streptococcus dysgalactiae subsp. equisimilis and Streptococcus dysgalactiae subsp. dysgalactiae. [3] Although the name Streptococcus equisimilis is no longer valid, it is still encountered both in clinical practice, and in scientific journals. [4]
Streptococcus dysgalactiae subsp. canis [20] is the predominant subspecies encountered. It is a particularly common GGS in humans, although it is typically found on animals. S. phocae is a GGS subspecies that has been found in marine mammals and marine fish species.
The strains of Streptococcus, including S. canis, S. dysgalactiae subsp. dysgalactiae, S. equi subsp. zooepidemicus, S. suis, and mammalian S. agalactiae, maintained in domestic animals are widely distributed and their presence follows the hosts that they reside in. [20] Regional variations in the predominant serotypes of S. suis may impact ...
Though there are many groups of streptococci, the principal organisms that are known to cause human disease belong to group A (Streptococcus pyogenes), group B (Streptococcus agalactiae), group C/G (Streptococcus dysgalactiae) both members of group D (Streptococcus gallolyticus and Streptococcus infantarius, both members of the Streptococcus ...
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Streptococcus bovis is a group of strains of Gram-positive bacteria, originally described as a species, [5] [6] that in humans is associated with urinary tract infections, endocarditis, sepsis, [7] and colorectal cancer. [8] S. bovis is commonly found in the alimentary tract of cattle, sheep, and other ruminants, [9] and may cause ruminal acidosis.
Group A streptococcal infections are a number of infections with Streptococcus pyogenes, a group A streptococcus (GAS). [1] S. pyogenes is a species of beta-hemolytic Gram-positive bacteria that is responsible for a wide range of infections that are mostly common and fairly mild. If the bacteria enters the bloodstream, the infection can become ...