*Correspondence | Mohammad Enamul Hoque Kayesh, Department of Microbiology and Public Health, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barishal-8210, Bangladesh; Email: mehkayesh@pstu.ac.bd DOI | http://dx.doi.org/10.17582/journal.hv/2020/7.4.97.108