What are the prevention and control methods of Marek s disease in chickens?

Marek's disease in chickens can only be prevented by vaccination. The Marek vaccine is given to the chicks as soon as they emerge from the shell.

Summary. Chicken Marek's disease (MD) is a common lymphoproliferative disease in chickens, which is a highly contagious tumor disease caused by Marek's herpes virus, mainly affecting chickens aged 3 to 5 months, and the mortality rate can be as high as 80%, especially the flock of chickens that have not been immunized against Marek's disease is more susceptible to this disease.

Prevention and control methods. There is currently no effective drug for Marek's disease in chickens**. The control measures should be based on epidemic prevention, quarantine and disinfection.

1.Epidemic prevention: Within 1 day after the chick hatches, it is necessary to use the freeze-dried seedlings of Marek's disease attenuated virus for epidemic prevention. This vaccine is designed to prevent this disease and has no ** effect. Immunity is developed 14 days after injection, and the immunization period is one year.

2.Vaccine usage and preservation: The feathers indicated on the bottle label are diluted with phosphate buffer, and each chick is injected intramuscularly or subcutaneously in milliliters, and the diluted vaccine should be used up within 2 hours. The vaccine has a shelf life of 1 year at -10 and 6 months at 4.

3.Quarantine: Sick chickens are found to be burned or buried in a timely manner. Chicken farms with medical conditions can be used for serological examination by Qiong expansion method, and all positive hidden chickens detected by serology are eliminated.

4.Disinfection: Strengthen feeding management and do a good job in the sanitation and disinfection of the chicken coop environment. with formaldehyde.

1: How is Marek's disease in chickens**?

Chicken Marek's disease spike chain (MD) is a common empty lymphoproliferative disorder in chickens, which is a highly transmissible tumor disease caused by Marek's herpes virus, mainly harming chickens aged 3 to 5 months, and the mortality rate can be as high as 80%, especially the flock of chickens that have not been immunized against Marek's disease is more prone to this disease. Prevention and treatment methodsThere is currently no effective drug for Marek's disease**. The control measures should be based on epidemic prevention, quarantine and disinfection.

1.Epidemic prevention: Within 1 day after the chick hatches, it is necessary to use the freeze-dried seedlings of Marek's disease attenuated virus for epidemic prevention.

This vaccine is designed to prevent this disease and has no ** effect. Immunity is developed 14 days after injection, and the immunization period is one year. 2.

Vaccine usage and preservation: The feathers indicated on the bottle label are diluted with phosphate buffer, and each chick is injected intramuscularly or subcutaneously in milliliters, and the diluted vaccine should be used up within 2 hours. The vaccine has a shelf life of 1 year at -10 and 6 months at 4.

3.Quarantine: Sick chickens are found to be burned or buried in a timely manner.

Chicken farms with medical conditions can be used for serological examination by Qiong expansion method, and all positive hidden chickens detected by serology are eliminated. 4.Sanitization:

Strengthen feeding management and do a good job in the sanitation and disinfection of the chicken coop environment. with formaldehyde.

Add the same amount of potassium permanganate to mix smoke with a pin of formaldehyde solution, close the doors and windows for disinfection, the effect is better, and formaldehyde milliliters per square meter. The sports field can be disinfected with 3% caustic soda or 10% lime emulsion, and 30% plant ash solution can be used to disinfect the chicken coop and washing utensils. It is best to disinfect once a week to control the occurrence of this disease.

Is it better to inject the neck or leg of the vaccine to the chicks that have just hatched and have not eaten the eggs.

Vaccination: Generally, under the chicken wings, the tip of the chicken wing can be dotted with a needle.

Thank you so much! You're welcome <>

Comrade Chen Duotang: Hello! The answer to your question is as follows:

Prevention and treatment: This disease is a tumor disease caused by a virus, once it occurs, there is no measure to stop its epidemic and spread, and there is no specific drug. Therefore, the key to preventing the disease is to do a good job of effective immunization.

At present, the most commonly used vaccine for Marek's disease in chickens is turkey herpesvirus (HVT) vaccines, which are immunized at 1 day of age.

In addition to HVT vaccines, there are bivalent and multivalent vaccines, which are more protective than HVT vaccines and can protect flocks from the super strain of Marek's disease. The control effect is very good, but this kind of vaccine belongs to the cell-bound vaccine, and the vaccine must be placed in the liquid nitrogen tank during storage and transportation, which brings great difficulties to the field application, and is also the main reason why the current application is not widespread, in addition, the storage of this vaccine must be serious and responsible. If the liquid nitrogen tank is insufficient or even dried up due to improper management, the vaccine will be invalid, and the consequences for production will be very serious.

Finally, in order to improve the immune effect of Marek's disease, it is necessary to strengthen the prevention and control of other epidemic diseases, such as infectious bursal disease in chickens, infectious anemia in chickens, and salmonellosis in chickens.

Strengthening feeding management, reducing the impact of stress factors on chickens, and continuously improving the level of comprehensive veterinary health prevention and control are also important measures to prevent and control Marek's disease, which cannot be ignored. The above content is for reference only. (Responsible editor: Bubbles.)

6 July 2007).

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