Received: 16 April 2021
Accepted: 21 July 2021
First Online: 14 August 2021
: Fecal samples used in this study had obtained based on informed consent from farm owners. Collection of fecal samples from swines was approved by the Institutional Animal Care and Use Committee (IACUC) of Yichun University (permit number JXSTUDKY2019009), and all methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.