Use effective attenuated vaccines to observe the validity of the vaccine and whether the traits have changed before drinking. Do not use substandard, expired and improperly stored vaccines. Prepare for immunization Before drinking immunization, rinse the water system and drinking equipment thoroughly, but use disinfectants and detergents. Drinking equipment can not use metal products, it is best to use porcelain and plastic appliances. The choice of immunization water drinking water immunization water should be diluted with distilled water, cold water or clean deep well water, tap water should be boiled overnight after use. Diluted vaccines for vaccines should be poured into water and mixed with a clean wooden stick. If the outdoor wind is large, it should be done indoors. 0.2-0.5% skimmed milk powder or sorbitol can be added to the dilution to protect the vaccine titer. Before immunization, drinking water should be stopped for 3-6 hours before the immunization. The length of the water-retaining period should be controlled flexibly according to the room temperature and the dry and wet degree of the feed. Before drinking, you must increase the number of drinking fountains according to the number of chickens and the age of the chickens, so that more than 90% of chickens can drink enough vaccine at the same time. When there are many chickens and drinking fountains are insufficient, they can be performed in batches to prevent the vaccine from being used for a long time to cause vaccine failure. It is appropriate to dilute the concentration of diluted vaccine water. It should not be too much or too little. It should be determined by referring to the vaccine instructions and the size, quantity, and room temperature of the immunized chickens. Darkness should be consumed within 1-2 hours, but in order to allow each bird to drink a sufficient amount of vaccine, the drinking time should not be less than 1 hour. Usually 1-2 weeks old chicken 8-10 ml / only; 3-4 weeks old chicken 15-20 ml / only; 5-6 weeks old chicken 20-30 ml / only; 7-8 weeks old chicken 30-40 ml/body; 9-10 weeks old chicken 40-50 ml/body only. Select the immune time hot season, drinking immune time is generally selected in the early morning, avoid high temperature time. The vaccine diluent should not be exposed to sunlight. Precaution Medication Drinking water 2 days before and after immunization, a total of 5 days (preferably 7-10 days) of drinking water, feed can not add drugs that can kill the vaccine virus (or bacteria), disinfection should also be carefully selected disinfectants.
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