ANALYSIS OF THE DISTRIBUTION OF POSTODYPLOSTOMOSIS FISH IN WATER RESERVOIRS OF THE REPUBLIC OF CHUVASHIA AND MARIY EL
The purpose of this work is to monitor the spread of postodiplostomosis in the water reservoirs of the Chuvash Republic and the Republic of Mari El, to analyze the species composition of affected fish and the proportion of their damage. Postodiplostomosis is an invasive disease of fish caused by metacercariae of the digenetic fluke Posthodiplostomuni cuticola from the Diplostomatidae family. Post-diplostomosis occurs in many aquatic environments where proper fish health work has not been done. It is dangerous to eat a sick individual, therefore it is necessary to have an idea about the appearance of the infected fish, about in which bodies of water it can be found. The research work was carried out in the period from May 2020 to September 2021. The objects of research were the reservoirs of the republics of Chuvashia and Mari El and the fish caught in them. The analysis of the species composition of the caught fish and the percentage of their infestation with postodiplostomosis was carried out. Subsequently, a veterinary and sanitary examination of all caught fish was carried out. According to clause 3.9 of the "Rules for veterinary and sanitary examination of freshwater fish and crayfish", approved by the Main Directorate of Veterinary Medicine of the USSR “Gosagroprom” on June 16, 1988, all caught fish after cleaning the affected areas is allowed to be processed into culinary products with heat treatment, salting, smoking is not recommended, pickling and drying fish affected by postodiplostomosis. Good quality fish can be used without restrictions. As a result of the studies, it was found that among the considered water reservoirs, almost all of them are unfavorable for post-diplostomosis. If you eat such fish, you can get infected with helminthic infestation.