Muscovy Duck Short-Beak Syndrome [Big-Tongue Disease]
Release date:
2020-09-23
Given the currently high incidence of short-beak syndrome—commonly known as "big-tongue disease"—among meat ducks in nearby farming areas, we have implemented a series of preventive and control measures, particularly targeting ducks showing obvious beak symptoms or those reacting in slaughterhouse settings. "Farmers with a higher 'flight-to-failure' rate, as well as neighboring farms at risk, should promptly implement preventive and treatment measures." By adjusting immunization age, dosage, and coverage rates, disease progression can be stabilized, ultimately helping both the company and farmers minimize losses.
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Adjustments to the Immunization Schedule for Preventing Goiter |
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Before adjustment |
Adjusted |
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Immune Age |
1-3 days old |
1-day-old |
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Immune dose |
0.5 ml per unit |
1 ml per unit |
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Immunity rate |
60%-80% |
More than 99% |
1. Li Yugang On May 16, 10,000 Z-shaped ducks were released for raising. The farmer delayed the harvest by 3 days, bringing it forward to June 28 instead of the usual schedule. The average weight at harvest was 2.44 kg, which is significantly lower compared to ducks of the same breed and age typically harvested between 2.85 and 3.1 kg. Additionally, during the slaughtering process, the incidence of wing breakage was unusually high, with an increased proportion of small ducks—specifically, 2,650 extra birds were affected.
On the day of the vaccine delivery, the large-slip disease antibody was administered as per protocol. We had already informed the local authorities about the existing cases of large-slip disease, but the farmer firmly refused to accept the antibody. This was clearly documented on the visit record form, which the farmer has since signed. However, the outcome remains… Around 13 days, sporadic cases of paralyzed and inverted ducks began to appear. On that day, approximately 150 smaller ducks were selected for on-site necropsy, which revealed symptoms consistent with the early stages of big tongue disease. By about 20 days, the affected flock showed clear, typical signs of the disease—specifically, the characteristic shortening of the beak accompanied by an extended tongue. By 25 days, the flock also exhibited noticeable growth retardation, poor feather development, and a tendency for birds to hold one or both legs backward. Additionally, feed intake remained low, and body weights failed to meet the expected standards. 。
2. Treatment plan: There is no definitive treatment option—patients can only be given antiviral medications to slow down viral replication, antibiotics to prevent secondary bacterial infections, and enhanced nutritional support with vitamin supplementation. D and calcium help repair bone and intestinal mucosal development, as beriberi primarily affects skeletal growth.
3. The summary concludes that while the early stages of big tongue disease do not yet show characteristic lesions, there are still detectable signs: poor uniformity in appearance, significant individual variations in body shape, drooping tail tips, difficulty walking, brittle or soft bones, and either a single-leg or both-legs-backward stance. Additionally, affected animals may exhibit delayed feeding and pass white, watery stools.
Pathological findings: Primarily characterized by shedding of the gastrointestinal mucosa, enlargement of the glandular stomach, and absence of food in the stomach cavity.
There is no significant therapeutic benefit, as the disease primarily affects skeletal development. Treatment can only involve antiviral medications, nutritional support, and antibiotics to prevent secondary bacterial infections.
3. Learning from the lessons of the outbreak of lumpy skin disease, farmers realized that their insufficient attention had led to significant losses—both for the company and themselves. They also understood that, going forward, vaccination is absolutely essential, and they vowed never again to rely on luck—they will strictly follow the technical guidelines for livestock management.
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Unit Name:
Le Shou Agricultural and Pastoral Group Co., Ltd. – Hebei Branch
Service hotline:
0317-4600668
Contact address:
Xian County, Cangzhou City, Hebei Province
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