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Summary
Fowl adenovirus serotype 1 caused quail bronchitis in commercial egg-laying Japanese quail (Coturnix coturnix japonica) in Singapore. The infection led to respiratory distress and a 10-15% drop in egg production.
Area of Science:
- Avian medicine
- Virology
- Poultry science
Background:
- Quail bronchitis is an economically significant respiratory disease in commercial quail.
- Fowl adenovirus (FAdV) infections are prevalent in poultry, causing various clinical signs.
- Adenovirus serotype 1 has been implicated in respiratory diseases in other avian species.
Purpose of the Study:
- To confirm the causative agent of respiratory illness and egg production decline in commercial quail flocks in Singapore.
- To identify the specific serotype of fowl adenovirus involved.
Main Methods:
- Clinical examination of affected quail flocks.
- Isolation and identification of the causative virus from affected birds.
- Serotyping of the isolated fowl adenovirus.
Main Results:
- Fowl adenovirus serotype 1 was successfully isolated from two commercial quail flocks.
- Affected birds exhibited respiratory distress, reduced egg numbers (10-15%), and abnormal eggshell quality (soft-shelled, white eggs).
Conclusions:
- Fowl adenovirus serotype 1 is confirmed as the cause of quail bronchitis in the affected Singaporean flocks.
- This viral infection significantly impacts egg production and quality in commercial quail.
- Early diagnosis and management strategies are crucial for mitigating economic losses in quail farming.