Disinfection - suppression and destruction of pathogens of infectious and invasive diseases of fish using special means and techniques - fish and water reclamation and sanitary and veterinary measures (use of quicklime, quicklime and chlorine, calcium hypochloride, formalin and other chemical agents, heat treatment, irradiation, etc.).

Fish breeding and preventive measures are of great importance, since the treatment of fish is ineffective. In order to prevent the occurrence of various diseases, water bodies must be kept clean. Fish diseases are divided into 2 groups: contagious and noncontagious. Contagious include diseases caused by bacteria, viruses, fungi, algae, animal parasites. Non-contagious diseases arise as a result of abrupt changes in environmental conditions, metabolic disorders, traumatization of fish.