How to prevent goose influenza

Epidemiology

Goose influenza, referred to as goose influenza, is a systemic or respiratory acute infectious disease caused by some pathogenic serum subtypes of influenza A virus, which mainly occurs in goslings within 30 days of age. In recent years, the incidence of goose influenza has gradually increased, mostly due to sudden climate changes, poor feeding and management, and goslings infected by cold. The mortality rate is generally 50% to 90%.

Clinical symptoms

The most common type is acute, with sudden onset, depression, loose feathers, prolapse of wings, elevated body temperature, diet or waste food; tears in eyes, unilateral or bilateral corneal opacity in some geese, blindness in severe cases; runny nose or bright red blood in some geese Soft feet, unstable standing, unwilling to move, some goose head and neck swollen, tilting head and torticollis, turning in circles in the water and other neurological symptoms, some sick geese prolapse anus, egg production decreased by 20% and 50%. Pull yellow white or yellowish green water sample sparse dung. The course of the disease is usually 2 ~ 4 days.

Anatomical change

Congestion of nasal mucosa, conjunctiva and nictitating membrane, hemorrhage, grayish turbid cornea, nasal cavity filled with blood-like mucous secretions; congestion of throat and trachea, bleeding; gray necrotic plaque of myocardium; hepatomegaly and crispness; splenomegaly and protruding splenomegaly with erosive gray-white spots on the surface; pancreatic spot hemorrhage, transparent or white focal necrosis; mesenteric focal hemorrhage or hemorrhagic ulcer; ovarian follicular congestion, macular necrosis. In the case of head enlargement, jelly-like edema was seen under the skin of the head and mandible.

Prevention and cure measures

Precaution

The main results are as follows: (1) Scientific feeding and management, improve the conditions of feeding and management, keep the goose house dry and ventilated, and keep the goslings under 1 month old warm.

(2) do a good job in environmental hygiene, do a good job in disinfecting goose houses, @ # @ 232 floor equipment and floors, etc., and then select effective disinfectants such as 2%~5%NaOH, 0.1% peracetic acid and so on for thorough disinfection.

(3) Avian influenza oil emulsion inactivated vaccine was used to prevent the disease in the areas with high incidence of the disease. At the age of 7 ~ 10 days, the goslings were first exempted from subcutaneous injection of polyvalent avian influenza inactivated vaccine at the lower part of the neck at the age of 7 ~ 10 days, and then injected again every 15 days. The breeder geese were given second immunity at the age of 60 days, three immunity from 15 to 20 days before laying, and then immunized again every six months when the geese stopped laying.

Treatment.

The main results are as follows: (1) Avian influenza antiserum or polyvalent ultra-high immune egg yolk antibody combined with interferon and interleukin can enhance the resistance and non-specific immune function of geese, repair the injured immune cells and tissues, which is beneficial to rehabilitation. the effect is ideal in the early stage of the disease, which can often control the development of the epidemic and reduce death.

(2) choose excellent drugs to reduce stress, control secondary bacterial infection and prevent complications: Diamond needle combined with Banlangen and millet intramuscular injection; quick-acting cystic disease Ning, Kangang Huoba, Victoria mixed with water for free drinking of infected geese.

(3) in the course of treatment, it is necessary to isolate sick geese for treatment, strengthen disinfection of belt geese, reduce the concentration of influenza virus in geese, clean up dead geese in time and reduce feeding density.