草鱼细菌性烂鳃病的组织病理研究

草鱼细菌性烂鳃病是一种危害严重的常见鱼病。其组织病理变化可以分为慢性和急性两种类型。鳃组织病理变化，经过炎性水肿、细胞增生和坏死三个进程。慢性型以增生为主；急性型的鳃组织病理变化，由于病程短，炎性水肿迅速转入坏死，增生不严重或几乎不出现，以炎性水肿和坏死为主。患细菌性烂鳃病的草鱼的肝脏、肾脏也发生病理变化。肝细胞发生颗粒变性、水样变性、醣元颗粒消失，以至坏死；其肾组织主要发生近曲小管上皮细胞颗粒变性、水样变性、坏死，在坏死的肾小管周围的造血组织中的一些细胞核固缩，个别肾小球萎缩。人工感染患细菌性烂鳃病的当年草鱼的白细胞数显著地低于对照组，而红细胞数和血红蛋白量虽低于对照组，但没有显著性差异．

A HISTOLOGICAL STUDY ON THE BACTERIAL GILL ROT DISEASE OF GRASS CARP

The bacterial gill-rot disease is a common disease of grass carp, it makes serious harmfulness to the fish. There are two types of histapathological charges: chronic and acuteness. The gill tissue of the chronic generally undergoes three worsening steps, i.e. inflammatory edexua, hyperplasia and necrosis; but the acute vng only passes through two steps: edema and necrosis, because diseased is so short that the edema passes directly to necrosis and there is no hyperplasia step. The liver and kidney of the diseased fish also show hist.opathvlogical changes,the granular denaturation and vacualation were vecured, glycogen was disappeared,up until the necrosis in liver cells. The epithelial cells in the proximal convoluted.tubules of the kidney also make same change. A number of nuclei around necrotic tubules of kidney appeared rondensated.A few of glomeruli of kidney atrophied. The quantity of leukocytes of artificially infected fish is zuurh less than the controlled one, but the erythrocytes and hymoglobin of experimental group were slightly less than the control.