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Distribution (%) of group A Streptococcus pyogenes virulence gene among Streptococcus dysgalactiae subsp. dysgalactiae collections isolate in 2002–2003 and 2011–2013. speC, speK, speL, speM: encode streptococcal pyrogenic exotoxins; spd1: DNase; sdn: streptodornase (DNase). The statistical significance of the data was determined by a chi-square test (χ2), where a probability value (p) ≤ 0.05 was considered as statistically significant.
