1. Department of Environmental Health Engineering Shoushtar Faculty of Medical Sciences Shoushtar Iran
2. Infectious Diseases Research Center, Birjand University of Medical Sciences, Deparment of Microbiogy Birjand University of Medical Sciences Birjand Iran
3. Department of Environmental Health Engineering Behbahan Faculty of Medical Sciences Behbahan Iran
4. Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences; Environmental Technology Research Center Ahvaz jundishapur University of Medical Sciences Ahvaz Iran