Document is current

Article History

Received: 2 August 2017

Accepted: 9 March 2018

First Online: 14 March 2018

Ethics approval and consent to participate

: Ethics approval is not applicable. Animal handling and sample collection was performed or supervised by approved veterinarians. Consent was obtained from the farmer for the samples collected at their farm.

: Not applicable.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.