河蟹(Eriocheir Sinensis)“水瘪子”病的病理学研究

Pathological Study on “Shuibiezi” Disease of Crab Eriocheir Sinensis

通过组织切片技术研究了河蟹(Eriocheir Sinensis)"水瘪子"病的病理变化,其主要表现:头胸甲腔积水,全身组织水肿,肝胰腺萎缩,颜色变浅;肝胰腺萎缩的实质是腺管萎缩;在所检测的23只河蟹中,分别有21只和9只在其肝胰腺腺管上皮内观察到核内嗜酸性包涵体和微孢子虫.本研究表明,河蟹"水瘪子"病很可能是由病毒、微孢子虫等多种病因,特别是由病毒引发的以肝胰腺萎缩、水代谢异常为特征的疾病.

Pathological changes on ＂shuibiezi＂ disease of crab species Eriocheir Sinensis are studied using histologi- cal sectioning technique. The main changes are hydrops in the body cavity, severe edema in many organs, atroph- ying and light-coloured hepatopancreas. The dystrophy of hepatopancreas is due to shrinking of their gland ducts. In 23 crab bodies studied, Intranuclear acidophilia inclusions and microsporidians in the glandular epithelial cells of the hepatopancreas are observed in 2I and 9 of the 23 crab bodies studied, respectively. This study shows that the ＂shuibiezi＂ disease of the crabs is probably caused by microsporidians and other factors, especially by viruses, and characterized by dystrophy of the hepatopancreas and abnormality of water metabolism.