毛细线虫病系青、草鱼鱼种阶段的一种比较常见的疾病。在此种寄生虫少量寄生时(每尾感染1-3条)不致引起死亡,但在大量寄生时(每尾感染30-50条)则可引起鱼种的大量死亡。1963年在我县仙女垸养殖场的鱼种池内曾因此病的危害而死亡青鱼鱼种(1.2-1.4寸)达50余万尾,1974年我们又发现鱼种池内毛细线虫对火片草鱼种有不同程度的感染,据统计患此病的鱼池占全部鱼池的21.7%。针对当时情况,我们采用90% Department of Goncosetosis, grass carp species stage is a more common disease. In the small amount of parasite parasites (1-3 per tail infection) will not cause death, but in a large number of parasites (30-50 per tail infection) can cause a large number of fish deaths. In 1963 in our county fairy embankment farms pond species had died of the disease due to the disease of herring species (1.2-1.4 inches) reached more than 500 million in 1974, we also found that the fish pond capillary nematode fire grass grass species There are different levels of infection, according to statistics, the fish ponds account for 21.7% of all fish ponds. For the time, we use 90%