Isolation and Identificationand Homology Analysis on Group I Fowl Adenovirus
In order to recognize the prevalence ofgroup I fowl adenovirus(FAdV-I)in poultry,samples were collected from several large-scalechicken farms in Shandong,Heilongjiang and Jilin provinces for FAdV isolation,PCR assay and homology analysis. Resultsshowed that 10 FAdV-I strains were isolated from 76 samples with the positiverate reaching 13%. Among the 10 FAdV-I strains,1 of them belonged to serotype 4,6 of them belonged to serotype 8b,1 of them belonged to serotype 9,and 2 of them belonged to serotype 11. Theresults indicated that certain FAdV-I infection existed in Shandong,Heilongjiang and Jilin provinces,and the main serotypes had been transferredfrom serotype 4 to serotype 8b,thus the current serotype 4 inactivated vaccines need to be evaluatedto determine if they could control the spread of FAdV-I effectively.