Surveillance and analysis of avian influenza viruses in the external environment of poultry in Anqing City， Anhui Province

• Published in: Shanghai Yufang Yixue Vol. 35; no. 11; pp. 1058 - 1062
• Main Authors: WU Zhaochun, HUANG Xu, WANG Jinsheng, QIAN Yezhong, WANG Jin, CHEN Jiwen, LI Yuxin
• Format: Journal Article
• Language: Chinese
• Published: Shanghai Preventive Medicine Association 01.11.2023
• Subjects: avian influenza virus; external environment; surveillance
• ISSN: 1004-9231
• DOI: 10.19428/j.cnki.sjpm.2023.23310

ObjectiveTo determine the prevalence of avian influenza viruses in the external environment of poultry in Anqing City， Anhui Province， and provide scientific evidence for prevention and control of animal-derived influenza in humans.MethodsA total of 28 farmers’ markets/farms in 10 counties （cities， districts） of Anqing City， Anhui Province， were selected as surveillance sites by simple random sampling strategy. Poultry faeces and other related samples were collected for 6 consecutive weeks. Real-time fluorescence quantitative PCR was used to examine the nucleic acids of influenza A virus. Subtypes H5， H7， and H9 of avian influenza virus were further tested in the positive samples.ResultsA total of 426 specimens were collected， among which 113 tested positive with a positive rate of 26.53%. Among the positive specimens， 104 were determined to be subtype H9， accounting for 92.04%. It did not significantly differ in the positive rate between the main and non-main urban areas （χ2<0.01， P>0.05） or among the specim