Received: 17 April 2021
Accepted: 13 December 2021
First Online: 3 January 2022
: The study protocol was in accordance with the ethics guidelines of Jilin Agricultural University (JLAU) and the study was approved by the review board at JLAU, Changchun, China. The purpose of the study was explained to all study participants, and a written, informed consent was obtained prior to enrollment in the study. The sera were collected from the pets with a written agreement from the pet owners. Animals were handled in accordance with the requirements of the Animal Ethics Procedures and Guidelines of the People’s Republic of China.
: Not applicable.
: The authors declare that they have no competing interests.