Funding for this research was provided by:
Biotechnology and Biological Sciences Research Council (BB/GCRF-IAA/03.)
Received: 21 June 2019
Accepted: 21 August 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: This study was approved by the Director UNVTH and Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Nigeria, Nsukka and observed all the guidelines governing the use of animals in research.
: Not applicable.
: The authors declare that they have no competing interests.