Chickenpox is an acute contagious disease in chickens. The incidence peaks in the northern region from August to October. This is due to the large population of mosquitoes in this season. The mosquito bites make the disease serious. The fowlpox virus is found in large numbers in the skin and mucosal lesions of dead chickens. The poxvirus is very resistant to the outside world. The virus in the molting skin can survive for months in a dry environment, but it is sensitive to acid-base disinfectants. . General disinfectants can quickly inactivate them.
The disease chickens and medium chickens are susceptible and have huge losses. Skin and mucous membrane damage is an important way for the disease to be introduced. Mosquito bites, chickens and chickens fighting each other, armpit hair, overcrowding of birds, dark and moist, parasites, vitamin deficiency, sudden replacement of feed and other factors can induce The disease.
According to the clinical site of the occurrence of pox are divided into three types, namely, skin type, mucous membrane type and mixed type. Typical skin type symptoms can be seen in the crown, meat, skin, eyelids, corners and other hairless gray or yellow-white nodules, dry nodules after the formation of dark brown skin. Scabs usually remain for 3 to 4 weeks, leaving gray scars after leaving. Mucosal pox occurs in the oral cavity, throat, esophagus or tracheal mucosa, first in the mucous membrane to generate small yellow-white nodules, after the merger of small nodules into a yellow-white cheese-like pseudomembrane covering the mucosal surface. Mixed type is a mixture of two types of performance.
The skin type generally has no systemic symptoms, but after the skin is peeled off, the skin that is broken up provides opportunities for staphylococcus, Escherichia coli, and the like. In particular, after eyelid pox outbreak, Staphylococcus or E. coli-induced total ophthalmia causes blindness in the eyes, which results in huge losses in production. The mucous membrane type is more harmful. The enlargement and thickening of the pseudomembrane often causes difficulty in swallowing and breathing. The larger shedding pseudomembrane can block the trachea and cause the chicken to suffocate.
The disease spreads rapidly, and drug treatment has little effect. Only some antiviral drugs can be given by symptomatic treatment, and anti-inflammatory drugs can also be used to prevent secondary infections. The mucous-type found that dyspnea can open the mouth to see if there is a pseudomembrane blockage in the throat. If there is, use a dig ear or hooked wire to pull out the pseudomembrane and then pour a little anti-inflammatory drug.
Vaccination is of great significance. There are cross-serum protections between various poxviruses, and the domestically produced fowlpox vaccine has a definite effect. Generally, once inoculated, it will receive good results. From July to October, the chickens will advance to the first 10 to 15 days of age, and the second will be about 100 days old. In other months, the head of the chicken is free from 30 to 35 days old, and the second is 100 to 120 days old.
The fowlpox vaccine must be vaccinated and the method of puncture is particularly important. The correct method is to take a vaccine needle tip to take a vaccine, pierce the chicken wings in a hairless and avascular area at a 30 degree angle, pierce the skin, rotate the pen 90 degrees, and inoculate two times in succession. Many chicken farmers penetrating vertically or double Acupuncture, even with other vaccines, is not properly used and often leads to immune failure. After 3 to 5 days of stabbing, examine the scab in some chickens. If there is no response, they should be re-inoculated.
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