1. Department of Biological Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
2. Department of Microbiology, College of Natural and Applied Sciences, Western Delta University, Oghara, Nigeria
3. Applied Microbial Processes & Environmental Health Research Group, Faculty of Life Sciences, University of Benin, Benin City, Nigeria
4. Department of Environmental Hygiene, German Environment Agency (UBA), Berlin, Germany