VETERINARY AND SANITARY EXAMINATION OF FISH WITH OPISTHORCHIASIS AND DIPHYLOBOTRIOSIS
The purpose of the study was veterinary and sanitary examination of fish with opisthorchiasis and diphylobotriosis. The research objectives were the analysis of epizootic situation for parasitic diseases of fish in the Yeniseisk district of Krasnoyarsk Region, the study of the epidemiology of opisthorchiasis and diphyllobotriosis and the examination of fish for having helminth larvae. The analysis of epizootic situation was carried out according to veterinary and sanitary reports for 2012-2014. The epidemiology of opisthorchiasis and diphylobotriosis was studied according to medical statistics. The examination of fish for helminth larvae occurance was carried out by visual inspection and by the method of compressor study of sections of dorsal fish muscles with their examination under a microscope. In the Laboratory of Veterinary and Sanitary Inspection of the Yeniseisk district of Krasnoyarsk Region for the period from 2012 to 2014, 850 batches of fish of different species were studied. 13 batches were culled and sent to decontamination due to helminthic diseases of fish, the percentage of culling was 1.5 %. The proportion of opisthorchiasis was 30.8 %; of diphylobotriosis - 46.1; other parasitic diseases - 23.1 %. In the Yeniseisk district 266 people were registered with opisthorchiasis and 83 people - with diphylobotriosis. The analysis of the morbidity of the population was carried out by age, gender, occupation, their residence in settlements, months of the year, types and the place of fishing and acquisition of affected fish. In 2014-2016 125 specimens of river fish were examined. 22 specimens were affected by helminth larvae - 17.6 % of examined specimens. At the same time 3 fish specimens were with opisthorchis larvae - 2.4 % on average for three years, with diphyllobotriid larvae were 12 (9.6 %), and other helminths - 7 (5.6 %). The fish having helminth larvae, depending on the extent of the lesion, was disposed or used for food purposes after disinfection by freezing under appropriate conditions according to the current instructions.