Muscovy Duck "Flower Liver Disease" is a Muscovy duck infectious disease that has only emerged in recent years. It is highly contagious and is one of the major infectious diseases that currently harm Muscovy ducks. Initially proved to be caused by the virus, because of its main lesion is the liver, spleen, pancreas or intestine there are necrotic spots of different sizes, especially the liver shows dense necrosis points, was vividly known as Muscovy duck liver disease.
First, popular features.
At present, only Muscovy ducks are found. Muscovy ducks of all breeds are susceptible. 3 to 25 days of age are seen, 8 to 20 days old hair. The disease is seen all year round. It is frequent on hot and humid days and wet seasons. Usually 6 to 10 days of age begins to infect, 3 to 5 days after infection begins to die. When a dead duck begins to appear, 20% to 30% of ducks have liver, spleen, pancreas necrotic spots, and missed the earliest treatment opportunity. The disease develops rapidly, and 3 to 4 days can kill 60% to 70%. The incidence rate of 30% to 90%, mortality rate of 60% to 90%, great harm.
Second, the main symptoms.
Symptoms of diseased ducks were atrophy, loss of appetite, white or green sputum, gasping during the third week of illness, and weakness in concurrent ducks with serositis. The diseased duck has a hepatomegaly, with a large number of grayish white necrotic spots on the surface. The diameter is 0.5 to 1 mm, which is mostly 1 mm. Splenomegaly, become brittle, the surface see 1 ~ 3 mm large necrotic spots, such as whitish. Pancreatic hemorrhage, also see necrosis. Intestinal congestion, bleeding, ulcers, longer cases of intestinal wall visible 1 to 3 mm large necrosis. Kidney spotting, laryngotracheal mucus.
Third, control points.
Hepatic disease is a virus disease, and it is mainly controlled by injection of anti-hepatitis egg yolk antibodies. 10 to 20 days old is the most prone to develop, and it is also a migratory disease of Muscovy ducks, dysentery, and 2 or 3 types of diseases. Comprehensive prevention and control measures are 8 to 10 days of injection of Muscovy duck anti-droits liver disease, three weeks disease double egg yolk antibodies (trade name muscovy duck parvovirus double immune egg yolk antibody), the general injection once can be maintained for 6 to 7 days, in 15 to 16 days of age will be injected once again according to the situation. When the diseased ducks die, many diseased ducks have a very serious lesion. Therefore, the prevention of injections is the key to the disease. The amount of antibody Muscovy ducks 8 to 9 days of age to prevent 1 ml per pigeon, treatment 1.5 ml, intramuscular injection. For older persons, the dosage should be increased.
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