How to prevent and control diseases in large chicken farms

Scientific management and strict epidemic prevention system are the basis for controlling the occurrence of various infectious diseases. In terms of management, it is necessary to adopt the full-in-all-out system, raise chicks, mature chickens, and laying hens in separate areas, concentrate feces in the dung farms far away from the henhouse, fix special personnel, special cars, and special roads, and strictly prohibit the mutual infection between breeders, dung farms and manure cleaning personnel. chicken manure was removed on the same day, and the pollution caused by chicken manure was strictly controlled. At the same time, adhere to the daily chicken farm environmental cleaning, disinfection and chicken house with chicken disinfection. The breeding and management personnel adopt closed management, and the breeders are off duty once a quarter, and it is forbidden to enter or leave the production area casually. After entering the production area, the administrator must take a shower and change into special overalls, shoes and hats before entering. Items entering the henhouse, such as egg boxes, feed bags, vehicles, equipment, etc., must be strictly sterilized.

Reasonable immunization procedure is the key to prevent the occurrence of infectious diseases. The formulation of immunization procedure is mainly based on three factors: the growth and decline of various antibodies in chicken flocks, the immune performance of various vaccines, and the prevalence of off-site infectious diseases. For example, in the Newcastle disease immunization program, according to the growth and decline of maternal antibodies, 7-10-day-old IV vaccine was used by nasal drip and eye drops, and Newcastle disease oil emulsion inactivated vaccine was used at the same time. In this way, in the whole breeding stage, especially in the 45-90 days old, during the frequent occurrence period of chronic atypical Newcastle disease, the HI antibody titer of Newcastle disease in chicken flocks could be balanced above 1512, which effectively controlled the occurrence of chronic atypical Newcastle disease in the breeding stage. Before the start of production, the high-quality triple oil emulsion of Newcastle disease, transmission and egg drop syndrome was injected intramuscularly, at the same time, combined with attenuated or poisoned freeze-dried vaccine to be immunized with drinking water, so that during the whole laying period until elimination, the titer of serum HI antibody against Newcastle disease was kept above 1 1024, which had a good protective effect during the whole laying period.

Strict quality control of vaccines and veterinary drugs and correct use of vaccines are the guarantee to prevent the occurrence of infectious diseases. Vaccine products produced by regular manufacturers must be selected and purchased, and each batch of vaccines purchased must pass the quality inspection before use. For example, Newcastle disease vaccine must pass the vacuum detector test before titer test. The hemagglutination titer HA of Newcastle disease IV vaccine must be more than 1160 times, and the HA titer of Newcastle disease strain I must be more than 180 times. After the vaccine is purchased into the chicken farm, it should be kept by a special person. the vaccine should be prepared in a sterile room, using a special diluent or sterilized saline. Chicken inoculation should be carried out strictly and carefully in accordance with the prescribed methods and methods, and it is strictly forbidden to operate at will without authorization.

To carry out the laboratory detection and prediction system and guide the timely immunization of chickens is the guarantee to prevent the outbreak of infectious diseases. It is equipped with full-time testing and laboratory personnel, focusing on the regular detection and forecast of infectious diseases that have not yet occurred, and if there are signs of infection, they shall be vaccinated immediately.

Through the above measures, we can avoid the occurrence of various infectious diseases in a large area and play an escort role in the safe production of broiler farms.