近年来沙门氏菌肠炎日益增多,其中鼠伤寒沙门氏菌流行最广,占沙门氏菌感染的25～30%。本病在家庭感染及院内交叉感染极为严重,尤其新生儿室流行时有发生,有的医院病房4年未能控制。这是由于:(1)细菌在大便内存在时间长,大便已成形仍可培养出细菌;(2)有些成人大便带菌而无症状,成为健康带菌者和传染源;(3)患儿咽 In recent years, an increasing number of Salmonella enteritis, including the most popular Salmonella typhimurium, accounting for 25 to 30% of Salmonella infections. Infection of the disease and in-hospital cross-infection is extremely serious, especially in neonatal room epidemics have occurred, and some hospital wards failed to control for 4 years. This is due to: (1) bacteria in the stool for a long time, the stool has been formed can still form bacteria; (2) some adult stool with no symptoms, a healthy carrier and source of infection; (3)