猩红热是由乙型A组溶血性链球菌引起的急性呼吸道传染病,表现为发热、咽喉炎、全身充血性皮疹,疹退后出现脱屑等症状[1]。根据测资料显示,全国猩红热的发病数呈逐年上升的趋势[2]。但青海省监测资料显示,青海省猩红热除个别年份略有上升外,总体呈缓慢下降趋势[3]。循化撒拉族自治县位于 Scarlet fever is caused by A group hemolytic streptococcus acute respiratory disease, manifested as fever, pharyngitis, systemic congestive rash, rash back after scaling and other symptoms [1]. According to measured data show that the incidence of scarlet fever nationwide showed a trend of rising year by year [2]. However, the monitoring data in Qinghai Province show that the scarlet fever in Qinghai Province, except for a few years, rose slightly, showing an overall slow decline [3]. Xunhua Salar Autonomous County is located