Diversity and distribution of sulphate-reducing bacteria in human faeces from healthy subjects 1 and patients with inflammatory bowel disease 2

School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK; Gastroenterology 6 Research Unit, Box 262, Addenbrookes Hospital, Cambridge CB2 0QQ, UK; School of Electronic, 7 Electrical and Computer Engineering, University of Birmingham, Birmingham B15 2TT, UK; 8 Cranfield Health, Vincent Building, Cranfield University, Bedfordshire MK43 0AL: The Department 9 of Life, Health and Chemical Sciences, Open University, Milton Keynes, MK7 6BJ, UK; 10