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16.草鱼三代虫病【病原体】三代虫(Gyrodactylus spp.),也是鱼类鳃和体表上常见的单殖吸虫。【流行与危害】根据调查资料,鲩三代虫在湖北、湖南、山东、福建、广东、广西、云南和辽宁等地均有分布。但报道由此病而引起大批死鱼的病例并不多见,典型的病例发生于1959年湖北省仙桃市彭场养鱼场,其所养殖的春花草鱼,由此虫大量寄生而招致严重死亡。发病季节主要是春季。三代虫通常在宿主种群中呈高度聚集分布,因此,若非特别的环
16. Grass carp three generations of worm disease [pathogens] three generations of insects (Gyrodactylus spp.), But also fish gills and body surface common Monkfish. 【Epidemic and Harm】 According to the survey data, the three generations of insects are distributed in Hubei, Hunan, Shandong, Fujian, Guangdong, Guangxi, Yunnan and Liaoning. However, a large number of dead fish were reported as rare diseases. The typical case occurred in Pengchang Fish Farm in Xiantao City, Hubei Province in 1959. The spring flowers and grass carp farmed by this disease caused a large number of parasites and caused serious death . The onset season is mainly spring. The three generations of insects are usually highly clustered in the host population, therefore, if not special ring