伤寒是个很古老的疾病,伤寒的发病率随着城市卫生措施的改进,特别是饮水的改进而大大降低。解放以来,伤寒发病在全国均大幅度下降,尤以大城市下降更为明显。但近几年,有些传染病包括伤寒又有所抬头,甚至引起局部暴发流行。因此,目前对伤寒的防治工 Typhoid fever is a very old disease, the incidence of typhoid fever with the improvement of urban hygiene measures, especially the improvement of drinking water and greatly reduced. Since liberation, the incidence of typhoid fever has dropped significantly in the whole country, especially in the big cities. However, some infectious diseases, including typhoid fever, have also risen in recent years and have even caused a local outbreak. Therefore, the current prevention and treatment of typhoid fever