Immunity and disease prevention technology

Immunity and disease prevention technology
Immunity, simply to mobilize the body’s own defense against pathogen invasion, propagation and spread, to maintain the internal environment of the spike set, to achieve the process of living organisms. Immune prevention is the use of artificial immunity method enhanced biological law of immunity in order to achieve the purpose of preventing disease, artificial immune is artificial made vaccine, Miao Pu, tumor vaccine, poison cable or cellular immune preparation and vaccination to fish, the fish itself defense ability of corresponding diseases. Made with pathogen pick preparation raw said Miao Pu, virus, made of rickettsial antigen preparations known as (some of the two referred to as vaccine) vaccine, made by tumor tissue known as tumor vaccine. Bacterial exotoxin after 0.3% – 4% formalin treatment, toxicity and disappear immunogenicity still retain is called toxoid. Cellular immune agents are dry, transfer factor, etc..
Prevention and control of fish diseases by artificial immune method. Than the use of drugs for prevention and treatment, has the following advantages: 1, fish with most drugs have different degrees of injury and poison, easy to cause the water environmental pollution and drug toxicity and immune prevention methods on the gold does not have this situation. 2, the fish farms often long-term use of antibiotics, the aquaculture water resistant strains increased significantly, the efficacy was significantly decreased, the drugs increase, immune prevention method does not produce resistance in the isolates. 3, a large area of water fish, the use of drugs cost is too high, and the immune prevention is simple, economic. 4, some diseases, such as virus diseases, tumor, robe worm disease, prevention and control of drug is difficult to bear fruit, but also need to study the immune prevention methods,