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一、前言鲩、青鱼肠管病有二类病原:一类是寄生虫,一类是细菌。寄生虫病原中除青鱼肠道内寄生的原生动物——青鱼艾美虫(Eimeria mylopharyngodoni Chen.)、肠艾美虫(E.intestinalis Chen)为害较大外,一般对寄主无致命的损害,祇有在大量寄生时,而且肠管又因细菌或其他因素引起发炎时,才有加剧病情的作用。细菌(传染)性肠炎对饲养的鲩、青鱼危害很大,尤其对当年鲩鱼、二龄青鱼更严重,有的鱼池死亡率高达90％以上。细菌(传染)性肠炎的发病征状是:病鱼肛门肿胀,呈紫红色;沿腹部中线剖开鱼腹,往
First, the foreword 鲩, there are two types of pathogens in herring bowel disease: one is parasites, one is bacteria. Parasitic pathogens other than the parasitic protozoa in the intestine of the herring, Eimeria mylopharyngodoni Chen. And E. intestinalis, are generally more virulent to the host than only the In a large number of parasites, but also due to intestinal bacteria and other factors caused by inflammation, only to aggravate the condition. Bacterial (contagious) enteritis is very harmful to the reared fish and herring, especially to the second age heron. In some fish ponds, the death rate is over 90%. Symptoms of bacterial (contagious) enteritis are: swollen anus of sick fish, purplish red; cut open the belly along the midline of the abdomen, towards