Provisional Instruction regarding prophylaxis and liquidation of non-contagious branchionecrosis of fishes (No.13-4-2/1737 of 1999). Country/Territory Russian Federation Document type Regulation Date 1999 Source FAO, FAOLEX Subject Fisheries Keyword Fish disease Freshwater fishes Aquaculture Geographical area CIS (Commonwealth of Independent States), Eastern Europe, Europe Entry into force notes Entry into force from the date of issue. Abstract Non-contagious branchionecrosis of fishes (ecological or autogenic toxicosis, ammoniac toxicosis, and branchionecrosis) is fish disease caused mostly by pollution of water reservoirs related to highly intensive fish-farming and discharge of agricultural (animal) and other sewage into fishing water basins. There are two distinguished types of non-contagious branchionecrosis of fishes – exogenic and endogenic. Non-contagious branchionecrosis of fishes is found in carp species, big-mouthed buffalo, Full text Russian