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Cambridge Infectious Diseases

An Interdisciplinary Research Centre at the University of Cambridge

Studying at Cambridge


Dr Martin Welch

Dr Martin Welch

Regulation of microbial virulence and biofilms in Pseudomonas aeruginosa. Quorum sensing, anti-bacterials, stringent response.

Martin Welch is accepting applications for PhD students.

Martin Welch is available for consultancy.

Departments and Institutes



  • Genomics
  • Drug Resistance
  • Signal Transduction
  • Quorum Sensing
  • Bacteriology
  • Drug Discovery
  • Gene Expression
  • ppGpp
  • Gene Regulation


  • Chronic Infection
  • Pseudomonas aeruginosa
  • Cystic Fibrosis

Key Publications

Hannah G. Stickland, Peter W. Davenport, Kathryn S. Lilley, Julian L. Griffin and Martin Welch. Mutation of nfxB causes global changes in the physiology and metabolism of Pseudomonas aeruginosa. (2010). J. Proteome. Res. 9 :2957-2967.

James Hodgkinson, Steven D. Bowden, Warren R. J. D. Galloway, David R. Spring and Martin Welch. Structure-activity analysis of the Pseudomonas quinolone signal molecule. (2010). J. Bacteriol. 192 :3833-3837.

Mikkelsen H, Bond N, Skindersoe ME, Givskov M, Lilley KS and Welch M. “Biofilms and Type III secretion are not mutually exclusive in Pseudomonas aeruginosa”. 155: 687-698. Microbiology (2008).

Wang J-H, Gardiol. N., Burr, T., Salmond GPC, and Welch M “RelA-dependent (p)ppGpp production controls exoenzyme synthesis in Erwinia carotovora subsp. atroseptica.” J. Bacteriol. (2007) 189: 7643-7652.

Mikkelsen H, Duck Z,  Lilley, KS. and Welch, M. “The Inter-relationship between colonies, biofilms and planktonic cells of Pseudomonas aeruginosa”. J. Bacteriol. 189:2411-2416 (2007).