大小不等

• This disease is shown more send out come on , but if be in collective unit carelessly the sanitation of disinfection of patient segregation , tableware , dormitory and toilet , and did not catch in fashionable district good food examines and supervise to the sanitation of personnel of food , faker , produce the popularity that size differs likely
  本病多呈散发发病，但如在集体单位不注重病人隔离、餐具消毒、宿舍和厕所的卫生，以及在流行地区未抓好食品检验和对饮食、摊贩人员的卫生监督，则有可能发生大小不等的流行。