Analysis of the causes of chicken immune failure
Posted by Animall Feed Blok Making Machine | updatetime 2021-09-27 16:52
Analysis of the causes of chicken immune failure:
1. Before the vaccine, the chicken with a strong feed mixer found that if the virulent pathogen has sneaked in, but there are no obvious clinical symptoms or use of highly toxic feed and infection.
2. Excessive dosage or wrong usage method. For example, high-dose use of Newtown Kitchen Series I in chicks will cause nerve-sensing metal drinkers such as turning heads or turning circles, or the wrong time of stopping water, or drinking water for too long (more than two hours), etc., which will reduce the invalid price and affect The immune effect.
3. Improper vaccination time. If the vaccination time is too early, it will have a neutralization reaction with the maternal antibodies in the chicks, and the neutralized vaccine will not have an immune effect; if the vaccination time is too late, the maternal antibodies in the chicks may be low. He had been infected by a virus before vaccination and became ill.
4. Causes adverse reactions after vaccination. For example, the inoculation of Newcastle disease I vaccine and infectious bronchitis vaccine may cause an unobvious outbreak of mycoplasma septicemia. Therefore, when the flock has latent Mycoplasma septicemia and the above-mentioned vaccination is required, it is necessary to consider taking drugs to the vaccinated chickens in advance to reduce or prevent the outbreak of the latent disease.
5. Interference between different types of vaccines. Some chicken farmers are simultaneously vaccinated with Newcastle Disease I vaccine and fowlpox vaccine. Due to the strong interference effect of the Newcastle Disease I vaccine, it can lead to the failure of fowlpox vaccine immunity, which may cause fowlpox. Therefore, it is recommended that in order to ensure the immune effect, the general steel mixer should be vaccinated separately as much as possible in order to produce strong immunity.
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