Zhang, H. J.
Song, J. K.
Wu, X. M.
Li, Y. H.
Wang, Y.
Lin, Q.
Zhao, G. H.
Article History
Received: 14 November 2018
Accepted: 29 April 2019
First Online: 11 May 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study including the collection of faecal samples were permitted by the farm owners. The protocols in this study were approved by the Guidance of Laboratory Animal Care and Use of Chinese Ministry of Health, China, and the Research Ethics Committee of Northwest A&F University.