Ten attentions should be paid to the immunization of chickens.

1. Chicken vaccine, also known as antigen, is a kind of biological products. Can be divided into toxic vaccine, toxic vaccine, virulent vaccine. The production method is divided into freeze-dried vaccine and wet vaccine, and the preservation method is also different. freeze-dried vaccine should be kept in a frozen freezer, wet vaccine is also called liquid vaccine, and it should be kept in a freezer of 0 ℃ ~ 8 ℃. Because the freezing equipment in rural areas is incomplete, most households are not rich and do not have a refrigerator, so they must be used now, especially in summer. When you get the vaccine at home, you must add ice to cool down, and it is best to drink the vaccine with ice water and avoid direct sunlight in order to ensure the effect.

two。 When buying a vaccine, you should first pay attention to the name, approval number, production date, packaging dose and production site to comply with the provisions of the measures for the Administration of Veterinary Drug labels and instructions, and use the recently produced fresh vaccine. do not use obsolete or expired vaccines or unused vaccines from chickens, especially if you do not have a refrigerator, put the vaccine medicine in the refrigerator of relatives or neighbors, and put it with frozen fish It would be better to put it in the freezer of a professional supplier. As the electricity in rural areas is often cut off, repeated freezing and thawing will destroy the quality of the vaccine.

3. In order to accurately calculate the amount of water used per mu of epidemic disease, the amount of drinking water should be increased, the amount of eye drops and nose drops should be less than that of drinking water, and the diluent should be used strictly according to the requirements, such as normal saline, cold boiled water, well water or special red (Marek), blue (transfer) diluent, the dilution concentration should be calculated to meet the required dose requirements according to the amount of drinking water and the length of drinking time. Generally, it is necessary to control the water before drinking the vaccine, 2 hours in summer and 3 hours in winter, so that chickens have thirst to drink quickly.

4. Attention should be paid to the method of dilution; the cap of the freeze-dried vaccine is a high-pressure lid, and the method of dilution is to slowly inject five milliliters of diluent into the bottle with a syringe, and then open the cork and pour it into the water after the vaccine in the bottle is dissolved, which avoids the sudden opening of the vacuum freeze-dried vaccine bottle cap and the sudden increase of pressure in the bottle, so that part of the virus is impacted and inactivated.

5. In order to improve the immune effect, it is necessary to prolong the vitality of the vaccine (virus), also known as inactivated half-life. An immune enhancer can be added. 2.4 g skimmed milk powder can be added to every kilogram of drinking water when immunizing. The main components of skimmed milk powder are proteins and sugars, in which the diameter of protein is between 1~2nm, its aqueous solution is colloidal solution, the diameter of virus is generally between 20~30nm, and the protein molecule is smaller than virus, so virions are surrounded by protein molecules, which can prevent the polymerization of virions. It is beneficial to absorption and transformation. When there is no milk powder, it can be replaced by 20, 18, 14 or sugar. Cannot use electrolysis multidimensional, because electrolysis multidimensional can decompose, ionize aqueous solution, coagulate protein, destroy the potency of vaccine. Be careful not to add antibiotics and electrolytic multidimensions to the vaccine. Antibiotics can kill bacteria or inhibit bacteria, but are ineffective against viruses. after adding antibiotics to the diluent, it can prevent bacterial diseases due to lax disinfection in the process of vaccination, but this approach is not entirely appropriate. because some antibiotics can change the osmotic pressure or PH value of the diluent, especially electrolytic multidimensional, it can accelerate the inactivation of vaccines and viruses, thus reducing the titer of the vaccine.

6. Strictly control the dosage. When injecting oil vaccine, the quantity of injection should be strictly controlled, the amount of vaccine would rather be large than small, the amount of vaccine will aggravate the immunity of chickens, and a small amount of vaccine can not cause immunity.

7. Grasp the interval between the use of the vaccine. When drinking the vaccine, the drinking time should not be less than one hour or more than two hours. when drinking water in the summer high temperature season, you can add an appropriate amount of ice to the water, and drink the remaining 1amp 2 vaccine after half an hour of stopping.

8. Reduce stress as much as possible. When inoculating to catch chickens, change the light bulb of the chicken house to blue at night. Because the chicken is blind to the blue light, people can see the chicken, but the chicken can not see the people and will not alarm the group.

9. During the vaccination period, strengthen feeding and management to keep the air in the house fresh and free of thieves and ammonia. Add an appropriate amount of electrolytes and vitamins to the water, especially Va, Vb and Vc. 10. The number of immunization should not be increased blindly. Some farmers have a panic about the epidemic disease of chickens, especially Newcastle disease, which is vaccinated every few days, and both dead and live vaccines are used at the same time, which disturbs the immune mechanism and immune response of chickens. Such vaccination often makes chickens not only unable to get effective protection, but also leads to the occurrence and epidemic of the disease.