hazir rahman department of microbiology, kohat university of science and technology, kohat, pakistan; department of microbiology, kohat university of science and technology, kohat, pakistan. tel: +92-3479854732 usman ali khan department of microbiology, kohat university of science and technology, kohat, pakistan muhammad qasim department of microbiology, kohat university of science and technology, kohat, pakistan noor muhammad department of biotechnology and genetic engineering, kohat university of science and technology, kohat, pakistan muhammad daud khan department of biotechnology and genetic engineering, kohat university of science and technology, kohat, pakistan muhammad asif department of microbiology, kohat university of science and technology, kohat, pakistan