Funding for this research was provided by:
Key Technologies Research and Development Program (2016YFD0500800)
Received: 19 June 2020
Accepted: 12 January 2021
First Online: 25 January 2021
Ethics approval and consent to participate:
: This study was approved by the Animal Ethics Committee of Yangzhou University. All samples were collected only as routine diagnostic sample submissions at the Key Laboratory of Avian Preventive Medicine, Ministry of Education, Yangzhou University, China. The owners gave their written consent for sample collection, and the locations where we sampled are not privately owned or protected in any way.
: Not applicable.
: The authors declare that they have no competing interests.