Abstract
ABSTRACTThirty-four fowl adenoviruses (FAdVs) isolated from chickens with gizzard erosion (GE) from 1999 to 2010 were characterized phylogenetically together with foreign isolates. The phylogenetic analysis based on part of the hexon gene classified these 34 FAdV isolates into 3 groups: FAdV-1, −8a and 8b, thereby suggesting that FAdVs associated with GEs in chickens are diverse. All 30 FAdV-1 isolates were genetically identical, and they were also identical with FAdV-1 isolates from GEs in chickens in European countries (Germany, Poland, Austria, Hungary and Italy). Thus, the same type of FAdV-1 has been associated with outbreaks of GE in Japanese chickens for the past 10 years, which may have spread from a common ancestor, although the epidemiological relationship is unknown.
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