Funding for this research was provided by:
National Project for Prevention and Control of Transboundary Animal Diseases (2017YFD0501800)
Received: 17 December 2018
Accepted: 5 June 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: Animal treatment and sample preparation complied with the Animal Ethics Procedures and Guidelines and was approved by the Animal Ethics Committee of Northeast Forestry University.
: Not applicable.
: The authors declare that they have no competing interests.