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一、小肠结肠炎耶氏菌经口进入肠道后,主要在盲肠至直肠段定居和繁殖,其他部位比较少见。二、O∶3型小肠结肠炎耶氏菌在小白鼠的带菌时间为53天,很少超过2个月,家兔的带菌时间更短。三、直肠和结肠粘膜和内容物的耶氏菌都很多,在急性感染猪和鼠,常为优势菌,和纯培养一样。四、耶氏菌活菌经口感染,有免疫力,死菌短期感染无免疫力。五、鼠疫耶氏菌EV株活菌免疫,对O∶3型耶氏菌无免疫力。
First, enterocolitis Enterobacteriaceae after oral administration, mainly in the cecum to rectum colonization and reproduction, other parts are relatively rare. Second, O: 3 Enterocolitis Yersinia fungi in mice for 53 days, rarely more than 2 months, rabbits with shorter carriage time. Third, the rectum and colon mucosa and the contents of the Yersinia are a lot of acute infection in pigs and mice, often dominant bacteria, and pure culture. Fourth, live Yersinia via oral infection, immunity, dead bacteria short-term infection without immunity. Five, Yersinia pestis EV strain live bacteria immunity, no immunity to O: 3 type of Yersinia.