The Epidemiology Investigation And Pathology Research Of MAREK'S Disease In Liangzhou Area

Marek`s disease (MD) is one of the most serious infections disease in chicken. MD could cause to high death rate and disease incidence rate and influented the health development raising chickens industry seriously. It is value to take and study because the new popular of MD in Liangzhou area as a more centralized local in our province had been presented in the last few years and had the tendency proliferates to the peripheral locality.The article closely investgated and study to epidemiology clinical symptom, pathological change, diagnosis method, aspects of preventing and controlling measure and so on through widespread consulting material visiting raises chickens household.The result is following:1.The popular characteristic and rule of MD was that the MD had mainly the skin type, nerve type and internal organs type. The disease incidence rate from 2001 to 2005 was 0.12%, 0.14%, 0.10%, 0.09%, 0.07%, in turn, the death rate was 88.1%, 89.2%, 93.1%, 90.4%, 90.5%, in turn. The MD occurred in meat chicken and in density big chicken house. The occurring of the MD had no obvious seasonal and the MD occurred at winter and spring season .It could cause the MD disease because of the bad environment sanitation and raising management.2.It was only that vaccine immunity was used to prevent the disease and it could reduce the harm of the disease.3. The result of pathology indicated that the pathological change of skin type was made from tumor follicle formation, that the nerve type presented proliferative and leachability change and that the internal organs type presented proliferative change. The last type`s blood vessel periphery had obvious proliferation of kinds of cells and it is partial organization could be denatured and necrosed and be substituded by lump cell. 4.At present, a lot of problom in preventing works is that the insufficient valuing of the government, non-strict introducting quarantine, non-arrived disinfection and isolation measure,bad cultivation environment, non-specialized jobholders,lucky psychology, concealing the epidemic situation and so on .Union actual situation and pathology characteristic,some measure should be used such as safe introduction, prevention by the masses, all entering leaving, immunization and prevent, isolation and disinfection, strengthening immunity.