鲤鱼棘头虫病的研究

本文报道了1985-1987年在崇明县新民第三水产养殖场对鲤鱼棘头虫病的病原、症状及治疗方法的研究结果。该病可引起鲤鱼自夏花至成鱼大批死亡，全场感染率在70％以上；发病严重的鱼池则感染率高达100％，死亡率高达60％．病鱼肠壁上形成肉芽肿结节，严重时能使内脏粘连，甚至体壁溃烂和穿孔。病原是崇明长棘吻虫(新种）Rhadinorhynchus chongmingnensis sp.nov.。扫描电镜观察，吻上布满细毛。有吻钩14纵行，每行29～32个吻钩，粘液腺8个。治疗方法为每天每公斤鱼拌饵投喂0．6毫升四氯化碳，连服6天，效果良好．

STUDIES ON THE ACANTHOCEPHALIASIS OF CARP

This paper deals with the acanthocephaliasis of carp. The work wascarried out in 1985-87 at the Third Xinmin Fishfarm of Chongming County. 233diseased fish were vivisected and 964 parasites were observed. The detail of taxologicalcrucial characteristics were checked with scanning electron-microscope. The parasiteis a new species of genus Rhadinorhynchus in family Rhadinorhynchidae. This newspecies was designated Rhadinorhynchus chongmingnensis sp. nov. The pathogen, symptom and therapy of this disease are presented as follows: 1) Pathogen: Rhadinorhynchus chongmingnensis sp. nov. The male of adultparasite is 18.25mm in average length and 1.75mm in average width, the femaleaverage length is 23.59mm and 2.58 mm in average width. All over the proboscisare covered with fine fur. The crucial characteristics of this new species are 14longitudinal rows of 29-32 hooks on the proboscis. (see table 4 in the paper). The type specimen were preserved in The Fish Disease Laboratory, ShanghaiFisheries University. 2) Symptom: The disease is not very serious at all. When once a fish carries alot of parasites, it will cause death. The parasite mainly lives in the digestive tractof fish. After the probosics bores into the intestines wall, the granuloma will formaround the worm. This disease can infect to carp of size from 9-2,050 grammes. Itwould damage 60%, if 100% of fish are infected. 3) Therpy: The daily dosage is 0.6ml carbonei tetrachloridum per kilogram offish weight, mixed in fish food. Generally, if continually treating for six days, asatisfactory curative effect would be obtained.