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In 1984, many bacteria formerly grouped in the genus Streptococcus were separated out into the genera Enterococcus and Lactococcus. [6] Currently, over 50 species are recognised in this genus. This genus has been found to be part of the salivary microbiome .
The system, created by Rebecca Lancefield, was historically used to organize the various members of the family Streptococcaceae, which includes the genera Lactococcus and Streptococcus, but now is largely superfluous due to explosive growth in the number of streptococcal species identified since the 1970s. [2]
Streptococcosis is an infectious disease caused by bacteria of the genus Steptococcus.This disease is most common among horses, guinea pigs, dogs, cats, and fish with symptoms varying based on the streptococcal species involved. [1]
However, both Streptococcus dysgalactiae and the Streptococcus anginosus group can possess group A antigen as well. Group A streptococci, when grown on blood agar, typically produce small (2–3 mm) zones of beta-hemolysis, a complete destruction of red blood cells. The name group A (beta-hemolytic) Streptococcus is thus also used. [1]
Streptococcaceae are a family of Gram-positive bacteria, placed within the order Lactobacillales. [1] Representative genera include Lactococcus , Lactovum , and Streptococcus . References
Streptococcus sanguinis White and Niven 1946 S. sanguinis is a normal inhabitant of the healthy human mouth where it is particularly found in dental plaque , where it modifies the environment to make it less hospitable for other strains of Streptococcus that cause cavities , such as Streptococcus mutans .
Origin of nomenclature is derived from the Greek "peptos", meaning digested, and Streptococcus, a bacterial genus name combine to form Peptostreptococcus—the "digesting streptococcus". [2] The type genus is Peptostreptococcus, originally described by Kluyver and van Niel in 1936. [3] Recent taxonomic revisions have added several other genera ...
Peptostreptococcus anaerobius is a species of bacteria belonging to the Peptostreptococcus genus of anaerobic, Gram-positive, non-spore forming bacteria. The cells are small, spherical, and can occur in short chains, in pairs or individually. [2] Peptostreptococcus are slow-growing bacteria sometimes resistance to antimicrobial drugs. [3]