We call it Newcastle disease. Chicken plague? It is an acute, highly contagious and septic infectious disease caused by virus, and it is the biggest disease that harms poultry breeding. Although Newcastle disease can occur all year round, the incidence rate is the highest in cold and changeable seasons.
symptom
Sick chickens have listlessness, loss of appetite, difficulty breathing, and are often accompanied by diarrhea. People with serious illness will make strange behaviors such as shaking their heads, turning their heads, rushing forward or retreating. After the dead chicken is cut open, it will be found that there are jujube pits in the intestine and symptoms such as bleeding, necrosis and ulcer in the stratum corneum.
Prevention and control
When Newcastle disease occurs in chickens, it should be isolated, blocked and disinfected immediately to put out the epidemic as soon as possible. Adult chickens can be injected with 1 ml Newcastle disease I vaccine 500 times. Chickens can be injected with 0.5 ml of Newcastle disease vaccine 10 times. Once a day, continuous use for 2~3 times can control the epidemic well.
(2) Infectious laryngotracheitis in chickens
Infectious laryngotracheitis is an acute respiratory disease caused by virus, with long incubation period and rapid spread, and the mortality rate is generally 20%. It is available all year round, especially in autumn and winter.
symptom
Dyspnea is the most important feature of this disease. Chickens with this disease often open their mouths and exhale, and it is very painful to close their eyes. Accompanied by intermittent cough, severe cases will cough bloody mucus. When the dead chicken is cut open for inspection, it will be found that there is gray-yellow bloody mucus in its throat.
Prevention and control
There is no specific medicine for this disease. Once chickens are found to be sick, we can only consider inoculating attenuated vaccine of infectious laryngotracheitis to reduce the infection rate of chickens. In the usual feeding management, it is necessary to improve the ventilation conditions of chicken houses and improve the health level of chickens.
(3) Chronic respiratory diseases in chickens
Chronic respiratory diseases in chickens are respiratory diseases caused by mycoplasma. The main cause of the disease is the sudden change of climate, the large temperature difference between day and night, which makes chickens get sick from cold. This disease mainly occurs in autumn and winter alternate seasons.
symptom
When chickens are infected with the disease, there will be obvious wheezing. Lack of energy, lowering the head and shrinking the brain, is often accompanied by tears. In severe cases, the eyes will swell, which will eventually oppress the eyes and lead to blindness. The incidence of the disease is low, the spread is slow, and the mortality rate is generally small. However, if we don't pay attention to it, it will induce many diseases and eventually bring huge losses to chicken farmers.
Prevention and control
There are relatively many drugs to treat this disease, such as streptomycin, kanamycin, erythromycin, Belamycin, Tylenol, etc. (please refer to the drug description or consult the local animal husbandry station veterinarian for specific dosage). Of course, the most commonly used method to prevent and treat the disease is vaccination.
(4) Infectious rhinitis in chickens
Infectious rhinitis in chickens is an acute respiratory disease caused by Haemophilus parasuis. The disease mostly occurs in adult chickens, and mainly enters the digestive tract through polluted feed and drinking water, thus causing infection, which generally occurs in the cold season of autumn and winter.
symptom
The obvious symptoms of sick chickens are facial swelling and mushy secretions in the nasal cavity. Although the incidence of the disease is extremely high and the transmission speed is fast, the mortality rate is extremely low. However, the disease can not be ignored, because after the illness gets worse, it will induce chicken pullorum, colibacillosis, pneumonia, ballonitis and other serious diseases.
Prevention and control
The biggest bane of the disease is sulfonamides, such as sulfadiazine, sulfadiazine and sulfathiazole. However, considering the influence of sulfonamides on egg production, compound sulfamethoxazole can also be used instead. At the same time, penicillin and oxytetracycline also have good therapeutic effects.
Summary: In the alternation of autumn and winter, chicken farmers can't ignore the above four diseases. Of course, it is not that these diseases will only occur in autumn and winter, but that these diseases are more frequent in autumn and winter.
As for prevention and control, what should be done? Prevention first, comprehensive prevention and control? . At ordinary times, it is necessary to strengthen the feeding management of chickens, keep the henhouse clean and hygienic, disinfect the henhouse regularly, and strictly inoculate and deworm chickens. Only in this way can we improve the disease resistance and immunity of chickens, reduce the source of infection of diseases, do a good job in the prevention and control of chicken diseases, and maximize the benefits of raising chickens.