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Infectious Bursal Disease (IBD), also known as Gumboro disease, is a highly contagious viral infection that affects young chickens, typically under 17 weeks of age. The disease is also observed in ducks and turkeys, posing a significant risk to poultry health and farm productivity worldwide.
What Causes Infectious Bursal Disease?
IBD is caused by the infectious bursal disease virus (IBDV), an avibirnavirus known for its resilience in various environmental conditions. Because the virus can survive for extended periods in poultry houses, equipment, and litter, it is particularly difficult to eliminate once introduced.
First identified in 1957 in Gumboro, Delaware, the disease has since spread globally and remains a major concern in commercial and backyard poultry farming.
Symptoms of Infectious Bursal Disease in Chickens
The severity of IBD can vary, but mortality rates commonly reach up to 20% and may rise as high as 60% in severe outbreaks. The most vulnerable birds are young chickens between 3 and 6 weeks of age.
- Watery diarrhea
- Depression and lethargy
- Ruffled or fluffed feathers
- Loss of appetite
- Weakness and reduced activity
Clinical signs are usually most noticeable in chickens aged 4 to 6 weeks. Breeds such as White Leghorns are generally more susceptible compared to brown-egg layers and broilers.
How Infectious Bursal Disease Spreads
Transmission mainly occurs through the fecal-oral route. Healthy birds become infected by ingesting feed, water, or materials contaminated with feces from infected chickens.
The virus can also spread indirectly through contaminated equipment, clothing, and farm workers, making biosecurity measures essential.
Prevention and Control of Gumboro Disease
Currently, there is no specific cure for Infectious Bursal Disease. Management focuses on prevention, supportive care, and strict biosecurity practices.
- Maintain strict hygiene and regular disinfection of poultry housing
- Implement effective pest control programs
- Provide clean, fresh drinking water at all times
- Allow sufficient downtime between flocks after contamination
- Limit access to poultry areas to reduce disease introduction
Supportive care such as multivitamin supplementation may help birds cope with the infection. If secondary bacterial infections occur, antibiotics may be administered under veterinary guidance.
Conclusion
Infectious Bursal Disease (Gumboro) remains a serious threat to young chickens due to its contagious nature and environmental persistence. Early recognition of symptoms and strict preventive measures are essential to protect your flock and reduce losses. Strong biosecurity and proper flock management are the most effective tools against this disease.
