Received: 28 February 2020
Accepted: 31 August 2020
First Online: 7 September 2020
Ethics approval and consent to participate
: All animals were housed and cared according to the German animal welfare act (S. 1206, 13137833–3/18.05.2006). The present study did not involve laboratory animals and only involved blood samples. The blood sampling procedures reported herein were conducted according to Directive 2010/63/EU, and the regulations of the Institutional Animal Care and Use Committee, Free University of Berlin that follow the OIE standards for use of animals in research purposes. A verbal consent for the use of blood samples before participation in the study was obtained from the herd’s owner.
: Not applicable.
: The authors declare that they have no competing interests.