Hydropericardium hepatitis syndrome (HHS) is a fatal disease in chickens, mainly caused by fowl adenovirus serotype 4 (FAdV-4). Since June 2015, HHS has appeared in many provinces in China. The diseas
1Exon 1 was too large to sequence as one product so two products were used to cover the region (Exon1–1 and 1–2). The reverse primer for sequencing Exon 7 differs between WDPs and SDPs due to the dele