Epidemiological Investigation of Outbreaks of Fowl Adenovirus Infection in Commercial Chickens in Korea12 November 2012
Preventive measures against fowl adenovirus infection and immunosuppressive diseases should be implemented on poultry farms, according to new research from Korea.
In total, 39 clinical cases of fowl adenoviruses (FAdV) infection in chickens (28 broiler, seven native and four layer chickens) between 2007 and 2010 in Korea were investigated and reported by K.S. Choi of the Animal, Plant and Fisheries Quarantine and Inspection Agency in Anyang in the Republic of Korea and co-authors there and at Bayer Korea and Kangwon National University.
In their paper in Poultry Science, they explain that FAdV types 4, 8b, and 11 comprised 18, 9, and 12 clinical cases, respectively.
All FAdV type 4 cases showed clinical hydropericardium (HPS) lesions as well as inclusion body hepatitis (IBH), whereas all FAdV types 8b and 11 cases exhibited IBH lesions without HPS.
All three types were detected in broiler (nine to 30 days old) and layer chickens (23 to 112 days of age), whereas most native chickens (14 to 65 days old) were affected only by FAdV type 4.
Infectious bursal disease virus and chicken infectious anaemia virus were complications in 51.3 per cent of FAdV cases, with mortalities varying from less than 0.1 per cent to 55 per cent. Chicken infectious anaemia virus was detected in all native chicken cases.
These results indicate that preventive measures against FAdV infection and immunosuppressive diseases on poultry farms should be implemented, concluded Choi and co-authors.
Choi K.S., S.J. Kye, J.Y. Kim, W.J. Jeon, E.K. Lee, K.Y. Park and H.W. Sung. 2012. Epidemiological investigation of outbreaks of fowl adenovirus infection in commercial chickens in Korea. Poult. Sci. 91(10):2502-2506. doi: 10.3382/ps.2012-02296
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