感染暴发性流行病病毒的中国对虾形态学研究 3.病虾鳃的显微与超微结构

Studies on Pathogenic Mechanism of the Explosive Epidemic Disease of Penaus chinensis in Morphology 3. The microscopic and ultramicroscopic strutures of gill tissue on suffering WTHXPenaus chinensis

在光镜和透射电镜下 ,观察经实验感染暴发性流行病病毒中国对虾的鳃组织 ,发现鳃丝扁平上皮细胞及少量的网状隔膜细胞被感染而引起血隙狭小 ,以及巨噬细胞样无颗粒细胞的趋化作用导致鳃丝扁平上皮细胞增厚而影响其代谢功能 .另外 ,还观察到巨噬细胞样无颗粒细胞有强烈的吞噬作用 .小颗粒细胞也具吞噬作用 ,在染色质凝聚结构等刺激下胞吐小颗粒 .大颗粒细胞也具有胞吐大颗粒功能 .与上述无颗粒细胞相比 ,胃结缔组织血窦内的浆细胞样无颗粒细胞其释放物与病毒结合参与体液免疫 .

Abstract:Under the light microscope and the transmission electron microscope, the gill tissue on Penaus chinensis infected by the explosive epidemic disease was observed. It was discovered that both simple epithelia and few reticular septum cells infected by the virus narrowed the lacuna, and the taxis of the macrophage-like agranular hemocyte went a step further to have an influence on the gill's metabolism together. Moreover, the macrophage-like agranular hemocyte played an important role of strong phagocytosis, but the small-granule hemocyte had the function of phagocytosis able to release small electron-dense granules by exocytosis while stimulated by a cohesive structure of chromatin with a membrane or phagocyted a huge foreign body; the large-granule hemocyte had not only the function of releasing large granules but also recepter-mediated endocytosis. In comparison with the macrophage-like agranular hemocyte in function and structure, the plasmacyte-like agranular hemocyte in the gastric sinus released its products combined with the viruses to take part in body fluid immunity. 