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Dr Graham Bradley

Associate Professor (Senior Lecturer) in Microbiology

School of Biomedical and Biological Sciences (Faculty of Science and Technology)


Deputy Head of School.

I have a broad interest in understanding the many aspects of environmental microbiology, which include the interrelated activities of protistans, fungi, the prokaryotes and viruses. In the past I have been involved in research into biodeterioration, biodegradation, microbial biofilms and especially biochemical aspects of microbial metal corrosion. We currently form a small team of academic and technical staff working on several projects but with a special interest in the development of the modern molecular methods that have really revolutionized microbial ecology.


Senior Lecturer in Microbiology, University of Plymouth (1986 to present)

Certificate in Education (FE), University of Plymouth (1990)

Applications Biochemist, Shandon Products, Runcorn, UK (1984-86)

PhD, Microbial Biochemistry, City of London Polytechnic (1981-84)

Senior research technician, Pharmacology, Wellcome Research Laboratories, (1980-81)

Graduate Member of the Institute of Biology, Polytechnic of the South Bank, (1980)

Research technician, Dept.of Biochemistry, Chelsea College, University of London, (1974-80)

Professional membership

• Member of the Society of Biology.

• Member of the British Mycological Society.

• Member of the Society for Applied Microbiology.

Roles on external bodies

Editorial board member (2001-2007) The World Journal of Microbiology and Biotechnology, Kluwer academic publishers.

Teaching interests

Fellow of the Higher Education Academy

I have an active interest in the research and use of novel teaching and assessment methods within my subject area. I am especially interested in problems of the delivery of advanced molecular microbiological techniques to larger student groups.

Staff serving as external examiners

External examiner (1999-2004), Edexcel HNC/D Applied Biology, School of Pharmacy & Biomolecular Sciences, University of Brighton.

Research interests

• The development of novel and rapid indicators of human pathogens in marine bathing waters and "out of season" risks to surfers and bathers. This has led to studies on the faecal bacterium Bacteroides fragilis and its bacteriophages.

• The modification and control of marine and freshwater biofilms: including water delivery systems.

• The microbial skin and gut flora of fishes, especially in response to pre- and probiotic feeds and spoilage situations.

Research groups

  • Food, Nutrition and Health

Recent publications.

Awah-Ndukum J, Kudi A.C, Bradley G, Smith NH, Ane-Anyangwe I, Cho-Ngwa F, & Titanji VPK (2012) Molecular genotyping of Mycobacterium bovis isolated from cattle tissues in the North West Region of Cameroon, Trop Anim Health Prod, Published online 7,11/12, DOI 10.1007/s11250-012-0295-x.

Hussein K, Glegg G & Bradley G (2012) Evaluation of Bacterial source Tracking of Faecal Bathing Water Pollution in the Kingsbridge Estuary , UK. In Significance of Faecal Indicators in Water; A Global Perspective Eds Kay & Fricker. Royal Society of Chemistry, UK. (ISBN 9781849731690)

Ndukum JA, Kudi C, Bah GS, Bradley G, Fon-Tebug FS, Dickmu PL, Njakoi HN & Agharih WN (2012) Bovine tuberculosis in cattle in the highlands of Cameroon: seroprevalence estimates and rates of tuberculin skin test reactors at modified cut-offs. Veterinary Medicine International, in press. 

AWAH-NDUKUM J, KUDI AC, BRADLEY G, ANE-ANYANGWE I, TITANJI VPK, FON-TEBUG S, TCHOUMBOUE J (2012) Prevalence of bovine tuberculosis in cattle in the highlands of Cameroon based on the detection of lesions in slaughtered cattle and tuberculin skin tests of live cattle Veterinarni Medicina, 57, 2012 (2): 59–76

Waines PL, Moate R, Moody AJ, Allen M & Bradley G (2011) The effect of material choice on biofilm formation in a model warm water distribution system. Biofouling10, 1161-74.

Merrifield, D.L., Bradley, G., Harper, G.M., Baker, R.T.M., Munn, C.B. & Davies, S.J. (2011) Assessment of the effects of vegetative and lyophilized Pediococcus acidilactici on growth, feed utilization, intestinal colonization and health parameters of rainbow trout (Oncorhynchus mykiss

Walbaum) Aquacult. Nut. 17, 73-79..

Ndukum, J.A., Kudi, C., Bradley, G., Ane-Anyangwe I. N., Fon-Tebug, S., and Tchoumboue, J. (2010) Prevalence of Bovine Tuberculosis in Abattoirs of the Littoral and Western Highland Regions of Cameroon: A Cause for Public Health Concern, Veterinary Medicine International, vol. 2010, Article ID 495015, 8 pages.

Merrifield, D.L., Bradley, G., Baker, R.T.M., Dimitroglou, A. & Davies, S.J. (2010) Probiotic applications for rainbow trout ( Oncorhynchus mykiss Walbaum) I. Effects on growth performance, feed utilization, intestinal microbiota and related health criteria. Aquacult. Nut. 16, 504-510..

Merrifield, D.L., Bradley, G., Baker, R.T.M. & Davies, S.J. (2010) Probiotic applications for rainbow trout (Oncorhynchus mykiss Walbaum) II. Effects on growth performance, feed utilization, intestinal microbiota and related health criteria postantibiotic treatment. Aquacult. Nut. 16, 496-503.

Merrifield, D.L., Dimitroglou, A., Bradley, G., Baker, R.T.M., & Davies, S.J. (2009) Soybean meal alters autochthonous microbial populations, microvilli morphology and compromises intestinal enterocyte integrity of rainbow trout (Oncorynchus mykiss Walbaum). J. Fish Dis. 32, 755-766.

Merrifield, D.L., Burnard, D., Bradley, G., Davies, S.J. & Baker,R.T.M. (2009) Microbial community diversity associated with the intestinal mucosa of farmed rainbow trout (Oncoryhnchus mykiss Walbaum). Aquacult. Res. 40, 1064-1072. 

Vattakaven, T., Bond , P., Bradley, G. & Munn, CB (2006) Differential effects of starvation and temperature on induction of the VBNC state in the coral pathogens Vibrio shiloi and Vibrio tasmaniensis. Applied and Environmental Microbiology, 72: (10) 6508-6513.

Bradley, G. & Hancock, C. (2003) Increased risk of non-seasonal and body immersion recreational marine bathers contacting indicator bacteria of sewage pollution. Marine Pollution Bulletin. 46: (6) 792-794. 
Other communications:
Sattar A, Bradley G and Jackson S (2011) Lipopolysaccharide as a real-time biomarker of human sewage pathogens in marine bathing waters. SfAM Summer Conference, Dublin 47 July.
Hussein KR, Bradley G and Glegg G (2011) A bacteriological study and source tracking of bathing water pollution in the Kingsbridge Estuary, UK. Faecal Indicators: problem or solution? Edinburgh 6-8 June

Waines P & Bradley G (2009) Differential effects of thermal flushing on bacterial culturability and viability in model warm water system biofilms. 1st European Congress on Microbial Biofilms, Rome 2-5 September 2009.

Waines P & Bradley G (2008) Aspects of biofilm formation using a novel water distribution system. SfAM summer conference, Belfast 7-10 July.

Banja B Kuri V & Bradley G (2007) Instrumental measurement of Mackerel (Scomber scombrus) fish stored at chilled and at ambient temperature as an indicator of freshness. FOOD- NEW OPTIONS FOR THE INDUSTRY,  EFFoST/EHEDG in Lisbon, Portugal 14-16 November 2007.

Owen M Waines P Bradley G & Davies S (2006) The effect of dietary supplementation of sodium butyrate on the growth and microflora of Clarias gariepinus. XII International Symposium on Fish Nutrition and Feeding May 28th-June 1st 2006 Biarritz, France.

Merrifield D Dimitroglou A Bradley G & Davies S (2006) The effect of partial fishmeal replacement with soyabean on rainbow trout gut microflora. XII International Symposium on Fish Nutrition and Feeding May 28th-June 1st 2006 Biarritz, France.