Received: 10 February 2020
Accepted: 27 July 2020
First Online: 5 August 2020
Ethics approval and consent to participate
: This study was approved by the Animal Ethics Committee of Henan Academy of Agricultural Sciences (Approval number SYXK 2014–0007). Experimental protocols for obtaining bovine clinical samples used in this study were carried out in strict accordance with the Animal Ethics Procedures and Guidelines of China. The sample collection work was approved with signed informed consent from the cattle farm owner.
: Not applicable.
: The authors declare that they have no conflicts of interest.