摘要
Objective To explore the relationship between superantigen and M protein gene(emm)-types genes of Group A Streptococcus pyogenes(GAS)isolated from patients with scarlet fever in Beijing from May 2012 to July 2013.Methods GAS was isolated from specimens of patients with scarlet fever.Superantigen genes(spe A,spe B,spe C,speF,speG,speH,speI,speJ,speL,speK,speM,ssa。