Streptococcus alactolyticus
Streptococcus alactolyticus is a species of Gram-positive, facultatively anaerobic cocci that forms chains and belongs to the Streptococcus bovis/equinus complex (SBSEC). It was proposed as a novel species in 1984 when lactose-negative porcine intestinal isolates previously assigned to biotype II of Streptococcus bovis were shown by DNA–DNA hybridization and phenotypic traits to constitute a distinct taxon.
Etymology
The specific epithet *alactolyticus* (Latin: *a-* "without", *lactum* "milk", and *lyticus* "able to break down") refers to the species' inability to hydrolyze or ferment lactose.
Ecology
S. alactolyticus has been isolated from dogs, pigs, and poultry, where it is considered part of the normal microbiota.
Clinical relevance
Although uncommon, S. alactolyticus has been implicated in opportunistic human infections. Reported clinical cases include infective endocarditis, bacteremia, and neonatal sepsis. A 2020 case report described a rare instance of neonatal meningitis caused by this species, confirmed through culture and treated successfully with ampicillin and cefotaxime.
References
External links
alactolyticus Category:Gram-positive bacteria Category:Anaerobes Category:Bacteria described in 1984