In one of our researchs, one patient with positive throat culture for Group B Streptococcus, presented reagent ASO, in a titer of 800 U/Tood. Could other groups produce ASO? Is it an occasional finding? Or did the patient present a previous infection by Group A Streptococcus in the last six months?
SLO is present in Streptococcus dysgalactiae subsp. equisimilis, which is a frequent but underdiagnosed cause of infections in humans. It belongs to Lancefield group C and G.
1. Davies MR, McMillan DJ, Beiko RG, Barroso V, Geffers R, Sriprakash KS, et al. Virulence profiling of Streptococcus dysgalactiae subspecies equisimilis isolated from infected humans reveals 2 distinct genetic lineages that do not segregate with their phenotypes or propensity to cause diseases. Clin Infect Dis. 2007;44(11):1442-54.
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