Year 2018, Volume 3, Issue 2

Year : 2018
Volume : 3
Issue : 2
Authors : Dmitrij SKACHKOV, Amina THAKAHOVA
Abstract : Bothriocephalosis of fish is a disease caused by tape worms Bothriocephalus opsariichthydis and Bothriocephalus acheilognathi parasitizing in the anterior part of intestine. Bothriocephalus spp. infection is widely spread among fish at pond farms, cage fish farms in cooling ponds of thermal power and nuclear power stations and in natural reservoirs. One have revealed Bothriocephalus in 26 species of fish attributed to Cyprinidae family, in salmons (Arctic salmon) and in some predatory fish (catfish, pikeperch). Different species of cyclopes serve as the intermediate hosts necessary for development of helminths. Fish fry and fingerlings are the most susceptible ones to infection. Fish of older age groups are less susceptible to this parasite. The data on biology, epizootology, clinical features and pathogenesis, diagnostics, therapeutic and prophylactic measures against this infection are represented. The results of the field trials with microsal against Bothriocephalosis in carps and grass carps carried out in different regions of the Russian Federation as well as monitoring of the safe use of microsal for the study period (2007 to 2016) are described. The daily dose of medicated feed with 2% of microsal corresponds to the daily feeding for fish. The therapeutic feeding is carried out during one day without preliminary starvation period according to the current technology of fish feeding with granulated feed. The dose level according to the active substance depends on water temperature and average fish weight and ranges 12 to 40 mg/kg. Prophylactic treatment is carried out twice a year: in late April – early May and in late August – early September (at pond farms) and in late September – early October (at cage fish farms) when the water temperature is not higher 150 C. In general the data obtained for 10 year period evidence about microsal’s safety for fish and at it's current application (according to the instructions) the reasonable benefit/risk ratio is maintained in all cases.
For citation : Skachkov, D., Thakahova, A. (2018). Bothriocephalus spp. infection of Cyprinidae: epizootology, clinical features and pathogenesis, diagnostics, therapeutic and prophylactic measures. AGROFOR International Journal, Volume 3. Issue No. 2. pp. 91-96. DOI: 10.7251/AGRENG1802091S
Keywords : Bothriocephalus opsariichthydis, Bothriocephalus acheilognathi, fish farms, microsal
download paper