沙门氏菌属从1892年首先发现至今已近一百年,1975年止全世界已发现1825种,现近二千多种血清型,国内发现近百种,与人类疾病有关只有数十种,由于人们饮食习惯改变,对肉类,乳品,蛋,海产需要量增加,食品加工机械化,商品化,周转环节多,细菌污染机会也多,菌型变迁,耐药菌株增多,沙门氏菌感染日趋增长,伤寒,付伤寒在沙门氏菌属中发病率下降,非伤寒型增加,其中鼠伤寒也越来越多,国外报导鼠伤寒感染占沙 Salmonella was first discovered in 1892, nearly a hundred years ago. In 1975, there were 1825 kinds of serotypes found in the world. There are nearly 2,000 serotypes in the world. Nearly 100 kinds of serotypes are found in China. There are only a few dozen of them related to human diseases. Since people Changes in eating habits, increased demand for meat, dairy products, eggs and seafood, mechanization of food processing, commercialization, more turnovers and more opportunities for bacterial contamination, changes in bacteria types, increased drug-resistant strains, an increasing number of Salmonella infections, typhoid fever, Typhimurium typhimurium to pay the incidence decreased, non-typhoid type increased, including more and more typhoid fever, foreign reports of typhoid infection accounted for sand