Inclusion body hepatitis (IBH) is an acute disease in chickens caused by fowl adenoviruses (FAdVs). Among twelve known FAdV types (FAdV-1 to 8a, and FAdV-8b to 11), classified into five different species (A-E), all of them were already involved in naturally occurring cases. The disease is mainly distributed in areas with intensive poultry industry. In Slovenia the etiological agent of IBH has not been confirmed to date. An outbreak of acute mortality affected a broiler flock of 12,000 animals. In two waves of elevated mortality rate, a total of 264 (2.2%) chickens were found dead in one week time. Affected birds showed ruffled feathers, depression, watery droppings and some of them limping. The most common pathological lesions seen on necropsy were pale, swollen and friable livers with subcapsular hemorrhages. On histological examination, acute hepatitis characterized by necrosis and hepatocytes, with large basophilic intranuclear inclusion bodies, were observed. The histological results were characteristic for IBH caused by adenovirus infection. The causative agent was identified as fowl adenovirus (FAdV) type 8b, a member of the Fowl adenovirus E species, based on PCR results of partial sequence of adenoviral polymerase and hexon gene. The confirmed type in our case is one of the most common causative agents involved in IBH. In addition, infectious bursal disease virus and infectious bronchitis virus were detected in the same flock.
|Number of pages||7|
|Journal||Slovenian Veterinary Research|
|Publication status||Published - Dec 1 2011|
- Fowl adenovirus 8b
- Inclusion body hepatitis outbreak
ASJC Scopus subject areas