The Muscovy Duck, also known as the red-headed duck, is a healthier and fater than the domestic duck. Its body length and width are slightly flat. There is a red or reddish black skin around the base of the head, and it is a kind of tender meat with a high feeding value. Water birds. According to our survey on the epidemiology of muscovy ducks, there are three kinds of epidemic diseases that affect muscovy duck breeding.
1 Duckling Viral Hepatitis
Muscovy Duck Virus Hepatitis is a rapidly spreading and highly lethal viral infectious disease caused by the duck hepatitis virus. The mortality rate of young muscovy ducks within one week of age can reach 95%. This disease can occur throughout the year, improper feeding and management, excessive temperature in the duck house, high density, poor sanitation, lack of vitamins and minerals can promote the occurrence of the disease.
The incubation period of young Muscovy ducks is generally 1 to 4 days. Suddenly the disease begins. The affected ducks begin to sleep while snoring. They are mentally depressed, necked down, arched back, finned, outstretched or gathered into a pile, and some diarrhea is unwilling. Walking, followed by neurological symptoms, movement disorders, the body fell to one side, convulsions, paroxysmal spasms on both feet, like a swimmer, head backwards, before the death was paralyzed.
The necropsy shows hepatomegaly, soft texture, pale red, bleeding spots or strips on the surface, mottled hemorrhagic zone; gallbladder enlargement, thin bile; spleen, kidney enlargement, hyperemia, mottled hemorrhage; some sick chicks The ducks were accompanied by white stools and there was no apparent change in the appearance of the intestines.
According to the acute onset of the disease, rapid transmission, short duration; high mortality within 3 weeks of age, adult duck disease; diseased ducks have obvious neurological symptoms; the main lesion is liver degeneration and bleeding, can make a preliminary diagnosis.
Duck ducks were immunized with duck hepatitis virus vaccine and boosted once every two weeks; ducklings of one day old were immunized with attenuated vaccine. The above measures can effectively prevent the occurrence of this disease.
The onset young muscovy ducks were treated with emergency injection of hyperimmune yolk antibody (serum), and each duck was switched to a needle. At the same time, strengthening the disinfection of duck houses and the environment can effectively prevent the spread of this disease.
2 duckling parvovirus disease
The disease is an acute, septic, infectious disease caused by Muscovy duck parvovirus. Young muscovy ducks are susceptible to the age of 3 weeks after hatching, so they are also known as young muscovy ducks.
The diseased ducks were immersed in the spirits, their feet were soft, their food was reduced, their drinking water increased, their diarrhea was severe, their yellowish green stools were mixed, and they were mixed with large amounts of air bubbles, and some were also accompanied by wheezing.
The necropsy of the necropsy revealed pathological changes characterized by the formation of fibrinous inflammation in the intestine, necrosis and loss of intestinal mucosa.
According to duck disease mainly affected by ducklings 1 to 3 weeks old, more common in 10 to 18-day-old, clinical diarrhea, dyspnea and supine foot as the main symptoms, can make a preliminary diagnosis.
Prevention and control measures: 1 young muscovy ducklings injected with duckling parvovirus vaccine or young Muscovy duck parvovirus yolk (hyperimmune serum) antibody before the age of 3 days; 2 pairs of diseased muscovy ducklings with anti-guy duckling parvovirus disease hyperimmune serum Or subcutaneous injection of yolk antibody, has a good effect in the early stages of disease.
3 Duckling goslings
The disease is an acute septic communicable disease caused by gosling plague virus, showing high incidence and high mortality. The disease mainly infects goslings, but in recent years, 2 to 5 weeks old Muscovy ducks in our area have also occurred.
Sick ducks are depressed, do not eat, have diarrhea, and have grayish white or yellowish-green dung. They also have foam, tears, runny nose, difficulty breathing, and soon become wasted and eventually convulsions die.
Vaginal turbidity and thickening of the air sac were observed in the necropsy; hepatomegaly, gallbladder swell, mesenteric hemorrhage, adhesion, and small intestine hemorrhage.
The effective measures to prevent the disease is to adopt vaccine immunity, intramuscular injection or hypodermic injection of gosling hyperimmune serum or high-immunity yolk antibody, the therapeutic dose is 1.0 ml/only, the preventive amount is 0.5-0.8 ml/only, there is good prevention and treatment effect. The affected duck groups should be strictly blocked and isolated; thoroughly clean and disinfect duck houses and the environment.
4 Comprehensive prevention
To control duck virus epidemics, comprehensive prevention and control measures must be taken. First of all, it is necessary to strengthen feeding and management to enhance the disease resistance of ducks in order to resist the invasion of pathogens in the external environment and avoid the influence of various stress factors on Muscovy ducks; secondly, the scaled duck farm should insist on self-cultivation and self-cultivation; The introduction of pest-free areas, the introduction of foreign ducklings isolated for more than 2 weeks, no disease can be found in the field before entering; third, the occurrence of epidemic disease in the duck house, must strictly implement isolation, disinfection and emergency vaccination And other measures. Duck farms, playgrounds, and utensils that are contaminated by diseased ducks should be thoroughly disinfected and reused after being idle for 1 to 2 months. Fourth, the epidemiological investigation of duck diseases should be strengthened to treat local duck diseases. Apply effective vaccines and serums for timely prevention.
Veterinary Medicine,Diarrhea Intestinal Disease,Livestock Anticoccidial Medicine,Kill Coccidia Injection Medicine
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