Duncan John Colquhoun's picture
Duncan John
Colquhoun
Adjunct Professor
Visit Address: 
Thormøhlensgt. 53 A/B
5020 Bergen
Postal Address: 
Postboks 7803
5020 Bergen
E-mail: 
Duncan.Colquhoun@bio.uib.no
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Journal articles
  • Brynildsrud, Ola Brønstad; Feil, Edward J.; Bohlin, Jon; Castillo-Ramirez, Santiago; Colquhoun, Duncan John; McCarthy, Una; Matejusova, Iveta; Rhodes, Linda D.; Wiens, Gregory D.; Verner-Jeffreys, David W. 2014. Microevolution of Renibacterium salmoninarum: evidence for intercontinental dissemination associated with fish movements. The ISME Journal. doi: 10.1038/ismej.2013.186
  • Nilsen, Hanne Katrine; Sundell, Krister; Duchaud, Eric; Nicolas, Pierre; Dalsgaard, Inger; Madsen, Lone; Aspán, Anna; Jansson, Eva; Colquhoun, Duncan John; Wiklund, Tom. 2014. Multilocus sequence typing identifies epidemic clones of Flavobacterium psychrophilum in nordic countries. Applied and Environmental Microbiology. 80: 2728-2736. doi: 10.1128/AEM.04233-13
  • Abayneh Tefera, Takele; Colquhoun, Duncan John; Austin, D.; Sørum, Henning. 2013. Multilocus variable number tandem repeat analysis of Edwardsiella piscicida isolates pathogenic to fish. Journal of Fish Diseases. doi: 10.1111/jfd.12190
  • Abayneh Tefera, Takele; Colquhoun, Duncan John; Sørum, Henning. 2013. Edwardsiella piscicida sp. nov., a novel species pathogenic to fish. Journal of Applied Microbiology. 114: 644-654. doi: 10.1111/jam.12080
  • Brudal, Espen; Winther-Larsen, Hanne Cecilie; Colquhoun, Duncan John; Duodu, Samuel. 2013. Evaluation of reference genes for reverse transcription quantitative PCR analyses of fish-pathogenic Francisella strains exposed to different growth conditions. BMC Research Notes. 6. doi: 10.1186/1756-0500-6-76
  • Duodu, Samuel; Madslien, Knut; Hjelm, Eva; Molin, Ylva; Paziewska-Harris, Anna; Harris, Philip David; Colquhoun, Duncan John; Ytrehus, Bjørnar. 2013. Bartonella Infections in Deer Keds (Lipoptena cervi) and Moose (Alces alces) in Norway. Applied and Environmental Microbiology. 79: 322-327. doi: 10.1128/AEM.02632-12
  • Duodu, Samuel; xihe, wan; Tandstad, Nora Martinussen; larsson, Pär; myrtennäs, Kerstin; Sjödin, Andreas; forsmann, Mats; Colquhoun, Duncan John. 2013. An improved multiple-locus variable-number of tandem repeat analysis (MLVA) for the fish pathogen Francisella noatunensis using capillary electrophoresis. BMC Veterinary Research. 9. doi: 10.1186/1746-6148-9-252
  • Lillehaug, Atle; Colquhoun, Duncan John; Alarcon, Marta; Skjelstad, Hanne Ringkjøb; Fyrand, Kjetil; Hovland, Tore; Vollstad, Dag. 2013. Kaldtvannsvibriose – et gammelt problem kommer tilbake? Norsk Fiskeoppdrett. 38: 60-63.
  • Matejusova, Iveta; Bain, Nicola; Colquhoun, Duncan John; Feil, Edward J.; McCarthy, Una; McLennan, Darryl; Snow, Michael; Verner-Jeffreys, David W.; Wallace, I. Stuart; Weir, Sarah J.; Hall, Malcolm. 2013. Multilocus variable-number tandem-repeat genotyping of Renibacterium salmoninarum, a bacterium causing bacterial kidney disease in salmonid fish. BMC Microbiology. 13:285. doi: 10.1186/1471-2180-13-285
  • Mitchell, Susan O; Steinum, Terje; Toenshoff, Elena R.; Kvellestad, Agnar; Falk, Knut; Horn, Matthias; Colquhoun, Duncan John. 2013. Candidatus Branchiomonas cysticola is a common agent of epitheliocysts in seawater-farmed Atlantic salmon Salmo salar in Norway and Ireland. Diseases of Aquatic Organisms. 103: 35-43. doi: 10.3354/dao02563
  • Poppe, Trygve; Colquhoun, Duncan John; Taksdal, Torunn; Nilsen, Hanne Katrine; Alarcon, Marta. 2013. Rognkjeks i oppdrett – diagnostiske og dyrevelferdsmessige utfordringer - Fagaktuelt. Norsk Veterinærtidsskrift. 09. 556-558.
  • Ruane, Neil; Bolton-Warberg, M; Rodger, H.D.; Colquhoun, Duncan John; geary, M; McCleary, S.J.; O'Halloran, K.; Maher, K.; O'Keefe, D; Henshilwood, K.; Geoghan, F; Fitzgerald, R.D. 2013. An outbreak of francisellosis in wild-caught Celtic sea Atlantic cod, Gadus morhua L., juveniles reared in captivity. Journal of Fish Diseases. doi: 10.1111/jfd.12210
  • Abayneh Tefera, Takele; Colquhoun, Duncan John; Sørum, Henning. 2012. Multi-locus Sequence Analysis (MLSA) of Edwardsiella tarda isolates from fish. Veterinary Microbiology. 158: 367-375. doi: 10.1016/j.vetmic.2012.03.006
  • Duodu, Samuel; Larsson, Pär; Sjödin, Andreas; Forsman, Mats; Colquhoun, Duncan John. 2012. The Distribution of Francisella-like Bacteria Associated with Coastal Waters in Norway. Microbial Ecology. 64: 370-377. doi: 10.1007/s00248-012-0023-0
  • Duodu, Samuel; Larsson, Pär; Sjödin, Andreas; Soto, Esteban; Forsman, Mats; Colquhoun, Duncan John. 2012. Real-time PCR assays targeting unique DNA sequences of fish-pathogenic Francisella noatunensis subspecies noatunensis and orientalis. Diseases of Aquatic Organisms. 101: 225-234. doi: 10.3354/dao02514
  • Poppe, Trygve; Taksdal, Torunn; Skjelstad, Hanne Ringkjøb; Sviland, Cecilie; Vågnes, Øivind; Colquhoun, Duncan John. 2012. Nye arter - nye diagnostiske utfordringer. Norsk Veterinærtidsskrift. 124: 19-21.
  • Shah, Syed Qaswar Ali; Colquhoun, Duncan John; Nikuli, Hamisi L.; Sørum, Henning. 2012. Prevalence of Antibiotic Resistance Genes in the Bacterial Flora of Integrated Fish Farming Environments of Pakistan and Tanzania. Environmental Science and Technology. 46: 8672-8679. doi: 10.1021/es3018607
  • Shah, Syed Qaswar Ali; Karatas, Süheila; Nilsen, Hanne; Steinum, Terje; Colquhoun, Duncan John; Sørum, Henning. 2012. Characterization and expression of the gyrA gene from quinolone resistant Yersinia ruckeri strains isolated from Atlantic salmon (Salmo salar L.) in Norway. Aquaculture. 350-353|: 37-41. doi: 10.1016/j.aquaculture.2012.04.022
  • Shah, Syed Qaswar Ali; Nilsen, Hanne; Bottolfsen, Kirsten; Colquhoun, Duncan John; Sørum, Henning. 2012. DNA Gyrase and Topoisomerase IV Mutations in Quinolone-Resistant Flavobacterium psychrophilum Isolated from Diseased Salmonids in Norway. Microbial Drug Resistance. 18: 207-214. doi: 10.1089/mdr.2011.0142
  • Sjödin, Andreas; Svensson, Kerstin; Öhrman, Caroline; Ahlinder, Jon; Lindgren, Petter; Duodu, Samuel; Johansson, Anders; Colquhoun, Duncan John; Larsson, Pär; Forsman, Mats. 2012. Genome characterisation of the genus Francisella reveals insight into similar evolutionary paths in pathogens of mammals and fish. BMC Genomics. 13. 13 pages. doi: 10.1186/1471-2164-13-268
  • Toenshoff, Elena R.; Kvellestad, Agnar; Mitchell, Susan O; Steinum, Terje; Falk, Knut; Colquhoun, Duncan John; Horn, Matthias. 2012. A Novel Betaproteobacterial Agent of Gill Epitheliocystis in Seawater Farmed Atlantic Salmon (Salmo salar). PLoS ONE. 7. doi: 10.1371/journal.pone.0032696
  • Zerihun, Adam Mulualem; Colquhoun, Duncan John; Poppe, Trygve. 2012. Experimental mycobacteriosis in Atlantic cod, Gadus morhua L. Journal of Fish Diseases. 35: 365-377. doi: 10.1111/j.1365-2761.2012.01349.x
  • Colquhoun, Duncan John. 2011. Bakteriejakt langs norskekysten. Argus : sunne dyr, frisk fisk, trygg mat : aktuelt fra Veterinærinstituttet. 02. 24-24.
  • Colquhoun, Duncan John; Duodu, Samuel. 2011. Francisella infections in farmed and wild aquatic organisms. Veterinary research (Print). 42. 15 pages. doi: 10.1186/1297-9716-42-47
  • Furevik, Anette; Pettersen, Eirin Fausa; Colquhoun, Duncan John; Wergeland, Heidrun Inger. 2011. The intracellular lifestyle of Francisella noatunensis in Atlantic cod (Gadus morhua L.) leucocytes. Fish and Shellfish Immunology. 30: 488-494. doi: 10.1016/j.fsi.2010.11.019
  • Nilsen, Hanne; Colquhoun, Duncan John. 2011. Bakterie- og virussykdommer hos leppefisk. Norsk Fiskeoppdrett. 36: 52-55.
  • Nilsen, Hanne; Johansen, Renate; Colquhoun, Duncan John; Kaada, Inge; Bottolfsen, Kirsten; Vågnes, Øyvind; Olsen, Anne Berit. 2011. Flavobacterium psychrophilum associated with septicaemia and necrotic myositis in Atlantic salmon Salmo salar: a case report. Diseases of Aquatic Organisms. 97: 37-46. doi: 10.3354/dao02390
  • Nilsen, Hanne; Olsen, Anne Berit; Vågnes, Øyvind Brune; Hellberg, Hege; Bottolfsen, Kirsten; Skjelstad, Hanne Ringkjøb; Colquhoun, Duncan John. 2011. Systemic Flavobacterium psychrophilum infection in rainbow trout, Oncorhynchus mykiss (Walbaum), farmed in fresh and brackish water in Norway. Journal of Fish Diseases. 34: 403-408. doi: 10.1111/j.1365-2761.2011.01249.x
  • Olsen, Anne Berit; Nilsen, Hanne; Sandlund, N; Mikkelsen, Helene; Sørum, Henning; Colquhoun, Duncan John. 2011. Tenacibaculum sp. associated with winter ulcers in sea-reared Atlantic salmon Salmo salar. Diseases of Aquatic Organisms. 94: 189-199. doi: 10.3354/dao02324
  • Steinum, Terje; Heum, Marianne; Colquhoun, Duncan John; Falk, Knut; Kvellestad, Agnar. 2011. Fisk: Ny bakterie påvist som årsak til gjellesykdom hos oppdrettslaks i sjøvann. Norsk Veterinærtidsskrift. 123: 568.
  • Zerihun, Adam Mulualem; Berg, Vidar; Lyche, Jan Ludvig; Colquhoun, Duncan John; Poppe, Trygve. 2011. Mycobacterium salmoniphilum infection in burbot Lota lota. Diseases of Aquatic Organisms. 95: 57-64. doi: 10.3354/dao02347
  • Zerihun, Adam Mulualem; Feist, Stephen W.; Bucke, David; Olsen, Anne Berit; Tandstad, Nora Martinussen; Colquhoun, Duncan John. 2011. Francisella noatunensis subsp noatunensis is the aetiological agent of visceral granulomatosis in wild Atlantic cod Gadus morhua. Diseases of Aquatic Organisms. 95: 65-71. doi: 10.3354/dao02341
  • Zerihun, Adam Mulualem; Hjortaas, Monica Jankowska; Falk, Knut; Colquhoun, Duncan John. 2011. Immunohistochemical and Taqman real-time PCR detection of mycobacterial infections in fish. Journal of Fish Diseases. 34: 235-246. doi: 10.1111/j.1365-2761.2010.01231.x
  • Zerihun, Adam Mulualem; Nilsen, Hanne; Hodneland, S.; Colquhoun, Duncan John. 2011. Mycobacterium salmoniphilum infection in farmed Atlantic salmon, Salmo salar L. Journal of Fish Diseases. 34: 769-781. doi: 10.1111/j.1365-2761.2011.01293.x
  • Bornø, Geir; Sviland, Cecilie; Colquhoun, Duncan John. 2010. Dødelighet hos leppefisk. Norsk Veterinærtidsskrift. 9.
  • Duodu, Samuel; Colquhoun, Duncan John. 2010. Monitoring the survival of fish-pathogenic Francisella in water microcosms. FEMS Microbiology Ecology. 74: 534-541. doi: 10.1111/j.1574-6941.2010.00973.x
  • Grove, Søren; Nielsen, Christer; Lunder, T.; Tunsjø, Hege Smith; Tandstad, Nora Martinussen; Reitan, Liv Jorun; Sørgård, Morten; Marthinussen, A; Olsen, Anne Berit; Colquhoun, Duncan John. 2010. Previously unrecognised division within Moritella viscosa isolated from fish farmed in the North Atlantic. Diseases of Aquatic Organisms. 93: 51-61. doi: 10.3354/dao02271
  • Mitchell, Susie O.; Steinum, Terje; Rodger, Hamish; Holland, Charles; Falk, Knut; Colquhoun, Duncan John. 2010. Epitheliocystis in Atlantic salmon, Salmo salar L., farmed in fresh water in Ireland is associated with 'Candidatus Clavochlamydia salmonicola' infection. Journal of Fish Diseases. 33: 665-673. doi: 10.1111/j.1365-2761.2010.01171.x
  • Steinum, Terje; Kvellestad, Agnar; Colquhoun, Duncan John; Heum, Marianne; Mohammad, Saima; Grøntvedt, Randi; Falk, Knut. 2010. Microbial and pathological findings in farmed Atlantic salmon Salmo salar with proliferative gill inflammation. Diseases of Aquatic Organisms. 91: 201-211. doi: 10.3354/dao02266
  • Løvoll, Marie Therese; Wiik-Nielsen, Christer R.; Tunsjø, Hege Smith; Colquhoun, Duncan John; Lunder, Tor; Sørum, Henning; Grove, Søren. 2009. Atlantic salmon bath challenged with Moritella viscosa - Pathogen invasion and host response. Fish and Shellfish Immunology. 26: 877-884. doi: 10.1016/j.fsi.2009.03.019
  • Mikalsen, Jarle; Olsen, Anne Berit; Rudra, Hari; Moldal, Torfinn; Lund, H.; Djønne, Berit K; Bergh, Øivind; Colquhoun, Duncan John. 2009. Virulence and pathogenicity of Francisella philomiragia subsp noatunensis for Atlantic cod, Gadus morhua L., and laboratory mice. Journal of Fish Diseases. 32: 377-381. doi: 10.1111/j.1365-2761.2008.00987.x
  • Steinum, Terje; Sjåstad, Knut; Falk, Knut; Kvellestad, Agnar; Colquhoun, Duncan John. 2009. An RT PCR-DGGE survey of gill-associated bacteria in Norwegian seawater-reared Atlantic salmon suffering proliferative gill inflammation. Aquaculture. 293: 172-179.
  • Mikalsen, Jarle; Olsen, Anne Berit; Tengs, Torstein; Colquhoun, Duncan John. 2007. Francisella philomiragia subsp. noatunensis subsp. nov., isolated from farmed Atlantic cod (Gadus morhua L.). International Journal of Systematic and Evolutionary Microbiology. 57: 1960-1965.
  • Mikalsen, Jarle; Skjærvik, Olaf; Wiik-Nielsen, Jannicke; Wasmuth, Marit; Colquhoun, Duncan John. 2007. Agar culture of Piscirickettsia salmonis, a serious pathogen of farmed salmonid and marine fish. FEMS Microbiology Letters. 1-5. doi: 10.1111/j.1574-6968.2007.00977.x
  • Wang, Zhan; Liu, Xin; Dacanay, Andrew; Harrison, Blair A.; Fast, Mark; Colquhoun, Duncan John; Lund, Vera; Brown, Laura L.; Li, Jianjun; Altman, Eleonora. 2007. Carbohydrate analysis and serological classification of typical and atypical isolates of Aeromonas salmonicida: A rationale for the lipopolysaccharide-based classification of A. salmonicida. Fish and Shellfish Immunology. 23: 1095-1106. doi: 10.1016/j.fsi.2007.05.004
  • Olsen, Anne Berit; Birkbeck, Harry T; Nilsen, Hanne; MacPherson, H L; Wangel, Carl; Myklebust, Cecilie; Laidler, L A; Aarflot, Leiv; Thoen, Even; Nygård, Solveig; Thayumanavan, T; Colquhoun, Duncan John. 2006. Vaccine-associated systemic Rhodococcus erythropolis infection in farmed Atlantic salmon Salmo salar. Diseases of Aquatic Organisms. 72: 9-17.
  • Olsen, Anne Berit; Mikalsen, Jarle; Rode, Marit; Alfjorden, Anders; Hoel, Erik; Straume-Lie, Kristian; Haldorsen, Randi; Colquhoun, Duncan John. 2006. A novel systemic granulomatous inflammatory disease in farmed Atlantic cod, Gadus morhua L, associated with a bacterium belonging to the genus Francisella. Journal of Fish Diseases. 29: 307-311.
Reports and theses
  • Hjeltnes, Brit; Kristoffersen, Anja Bråthen; Olsen, Anne Berit; Nilsen, Arve; Moen, Asle; Lillehaug, Atle; Fritsvold, Camilla; Mejdell, Cecilie Marie; Jimenez, Daniel Delgado; Colquhoun, Duncan John; Brun, Edgar; Biering, Eirik; Bornø, Geir; Hansen, Haakon; Nilsen, Hanne Katrine; Skjelstad, Hanne Ringkjøb; Hellberg, Hege; Høgåsen, Helga Rachel; Sindre, Hilde; Ørpetveit, Irene; Gu, Jinni; Stensli, John Haakon; Falk, Knut; vale nielsen, Kristoffer; vikan røsæg, Magnus; Linaker, Maria Lie; Alarcon, Marta; Gjessing, Mona Cecilie; Yousaf, Muhammad; Dale, Ole Bendik; Jansen, Peder A; Grøntvedt, Randi; Johansen, Renate; Hytterød, Sigurd; Steinum, Terje; Mo, Tor Atle; Tengs, Torstein; Taksdal, Torunn; Poppe, Trygve; Vrålstad, Trude. 2014. Helsesituasjonen i laksefisk 2013 Fiskehelserapporten 2013. Fiskehelserapporten. 2013. Veterinærinstituttet, Oslo.
  • Gjevre, Anne Gerd; Olsen, Anne Berit; Hellberg, Hege; Nilsen, Hanne Katrine; Skjelstad, Hanne Ringkjøb; Alarcon, Marta; Vågnes, Øyvind Brune; Colquhoun, Duncan John; Thoen, Even; Åtland, Åse; Skryseth, Linda Marie; Lillehaug, Atle. 2013. Oppklaring av yngeldødelighet. Veterinærinstituttets rapportserie. 2013: 3. Veterinærinstituttet. 19 pages.
  • Olsen, Anne Berit; Alarcon, Marta; Biering, Eirik; Colquhoun, Duncan John; Dale, Ole Bendik; Falk, Knut; Fritsvold, Camilla; Grøntvedt, Randi; Hansen, Haakon; Heuch, Peter Andreas; Hjeltnes, Brit; Jensen, Britt Bang; Johansen, Renate; Lie, Kai-Inge; Mejdell, Cecilie Marie; Nilsen, Hanne Katrine; Poppe, Trygve; Skjelstad, Hanne Ringkjøb; Sviland, Cecilie; Taksdal, Torunn; Thoen, Even; Vågnes, Øyvind Brune; Ørpetveit, Irene. 2011. Helsesituasjonen hos laksefisk 2011 Fiskehelserapporten 2011. Veterinærinstituttet, Oslo. 40 pages.
Book sections
  • Alarcon, Marta; Biering, Eirik; Colquhoun, Duncan John; Dale, Ole Bendik; Falk, Knut; Fritsvold, Camilla; Grøntvedt, Randi; Hansen, Haakon; Hellberg, Hege; Heuch, Peter Andreas; Hjeltnes, Brit; Jensen, Britt Bang; Johansen, Renate; Lie, Kai-Inge; Mejdell, Cecilie Marie; Skjelstad, Hanne R.; Sviland, Cecilie; Taksdal, Torunn; Thoen, Even; Vågnes, Øyvind; Ørpetveit, Irene. 2012. Helsesituasjonen hos laksefisk 2011. I, pages 5-31. In:
    • Olsen, Anne Berit; Hellberg, Hege. 2012. Fiskehelserapporten 2011. Fiskehelserapporten. 2011. Veterinærinstituttet. 40 pages.
  • Colquhoun, Duncan John; Duodu, Samuel; Nilsen, Hanne; Sviland, Cecilie; Vågnes, Øyvind. 2012. Helsesituasjonen hos marin fisk 2011. II, pages 33-39. In:
    • Olsen, Anne Berit; Hellberg, Hege. 2012. Fiskehelserapporten 2011. Fiskehelserapporten. 2011. Veterinærinstituttet. 40 pages.

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