Academic Rank:
Clinical Assistant Professor, Department of Pathology & Laboratory Medicine, UBC
Clinical Molecular Scientist, St. Paul’s Hospital
St. Paul’s Hospital
Short Bio:

Prior to joining St. Paul’s Hospital, I completed my Ph.D. in Experimental Medicine at UBC. My family and I then moved to the United Arab Emirates for 6 years. There, I established the first molecular reference laboratory at the Cleveland Clinic operated Sheikh Khalifa Medical City. We enjoyed the sun, sea, and sand (and cycling) in the Emirates. Since returning to Vancouver, I have served as the Clinical Molecular Scientist for St. Paul’s Hospital. The molecular diagnostics team and I have expanded our test menu by developing and validating numerous new molecular tests. We have developed PCR assays for a number of viruses, and established various assays for detection of bacteria and fungi, and antibiotic resistance. Molecular tests have also been established for the chemistry lab. In addition, our virology lab is the BC reference centre for viral load testing for HIV, hepatitis, and transplant associated viruses. Recently, we have been busy with next-generation sequencing tests for viral genotyping and drug resistance, and bacterial identification.

Academic background

  • PhD, Experimental Medicine, University of British Columbia. 2001
  • BASc, Chemical Engineering, University of British Columbia. 1988
  • BSc, Chemistry and Biochemistry, University of British Columbia. 1980


  • Mattison K, Grudeski E, Auk B, Brassard J, Charest H, Dust K, Gubbay J, Hatchette TF, Houde A, Jean J, Jones T, Lee BE, Mamiya H, McDonald R, Mykytczuk O, Pang X, Petrich A, Plante D, Ritchie G, Wong J, Booth TF. Analytical performance of norovirus real-time RT-PCR detection protocols in Canadian laboratories. J Clin Virol. 2011 Feb;50(2):109-13. doi: 10.1016/j.jcv.2010.10.008.
  • Ritchie G, Sherlock C, Mazzulli T, Fung S, Murphy D, Yoshida E, Villeneuve J; HBV resistance report: an analysis of current trends in Canada, AVR Bulletin Issue 1 Aug 2009.
  • Dai LJ, Li HY, Guan LX, Ritchie G, Zhou JX. The therapeutic potential of bone marrow-derived mesenchymal stem cells on hepatic cirrhosis.  Stem Cell Res. 2009 Jan;2(1):16-25. doi: 10.1016/j.scr.2008.07.005. Epub 2008 Aug 6. Review.
  • G Ritchie, A Wong, M Romney, and S Champagne Division of Medical Microbiology, St. Paul’s Hospital, Providence Health Care, Vancouver, BC A Real-Time PCR Assay to Identify MRSA and CMRSA10 from Surveillance Samples Can J Infect Dis Med Microbiol. 2008 January; 19(1): 77–142.
  • Kang HS, Kerstan D, Dai LJ, Ritchie G, Quamme GA. Adenosine modulates Mg(2+) uptake in distal convoluted tubule cells via A(1) and A(2) purinoceptors. Am J Physiol Renal Physiol. 2001 Dec;281(6):F1141-7.
  • Dai LJ, Kang HS, Kerstan D, Ritchie G, Quamme GA. ATP inhibits Mg(2+) uptake in MDCT cells via P2X purinoceptors. Am J Physiol Renal Physiol. 2001 Nov;281(5):F833-40.
  • Ritchie G, Kerstan D, Dai LJ, Kang HS, Canaff L, Hendy GN, Quamme GA. 1,25(OH)(2)D(3) stimulates Mg2+ uptake into MDCT cells: modulation by extracellular Ca2+ and Mg2+. Am J Physiol Renal Physiol. 2001 May;280(5):F868-78.
  • Dai LJ, Ritchie G, Kerstan D, Kang HS, Cole DE, Quamme GA. Magnesium transport in the renal distal convoluted tubule. Physiol Rev. 2001 Jan;81(1):51-84. Review.
  • Kang HS, Kerstan D, Dai L, Ritchie G, Quamme GA. Aminoglycosides inhibit hormone-stimulated Mg2+ uptake in mouse distal convoluted tubule cells. Can J Physiol Pharmacol. 2000 Aug;78(8):595-602.
  • Kang, H.S., G. Ritchie, D. Kerstan, L.J. Dai, and G.A. Quamme. beta-Adrenergic agonists stimulate Mg2+ uptake in mouse distal convoluted tubule cells. Am J Physiol Renal Physiol 279: F1116-F1123, 2000.

Research Interest

  • Molecular Diagnostics
  • Polymerase Chain Reaction
  • Next-Generation Sequencing

Teaching Interest

  • Molecular Diagnostic Methods
  • Quality Assurance and Quality Control
  • Regulation of Gene Expression