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Richard Holt in a lab

Richard A. Holt

Courtesy Research Associate
Department of Microbiology

Richard A. Holt

Courtesy Research Associate
Department of Microbiology

Forty-two years of experience in the study of fish disease as Senior Fish Pathologist at the Oregon Department of Fish and Wildlife (Retired). Previous activities include conducting research in the diagnosis and treatment of fish parasites, pathogens in hatchery fish, detection of pathogens in wild stocks of fish and determining causes of fish losses in Oregon.

Research

Principal area of research and publications has been in studies of the yellow pigmented bacterial fish pathogens such as Flavobacterium psychrophilum agent of cold-water disease and F. columnare, agent of columnaris disease. Currently participating on a project to study the occurrence of the myxosporean parasite, Ceratomyxa shasta, and its impact on wild salmonid stocks in the Klamath River watershed.

Background

Education

Ph.D. Microbiology, OSU

Publications

  • Ray, R. Adam, Holt, R.A. and Bartholomew, J. 2012. Relationship between temperature and C. shasta-induced mortality in Klamath River salmonids. J. of Parasitology. 93(3):520-526.
  • Stocking, R.W., Lorz, H.L., Holt, R.A. and Bartholomew, J.L. 2007. Surveillance for Ceratomyxa shasta in the Puget Sound Watershed, WA, USA. J. of Aquatic Animal Hlth. 19:116-120.
  • Bartholomew, J.L., Lorz, H.V., Atkinson, S.D., Hallett, S.L. Stevens, D.G., Holt, R.A., Lujan, K. and Amandi, A. 2007. Evaluation of a management strategy to control the spread of Myxobolus cerebralis in a lower Columbia River tributary. North American J. of Fisheries Mgmt. 27:542-550.
  • Stocking, R.W., Holt, R.A., Foott, J.S. and Bartholomew, J.L. 2006. Spatial and temporal occurrence of the salmonid parasite Ceratomyxa shasta (Myxozoa) in the Oregon-California Klamath River Basin. J. of Aquatic Animal Health. 18:194-202.
  • Hallett, S.L, Adkinson, S.D., Holt, R.A., Banner, C.A. and Bartholomew, J. 2006. A new Myxozoan from feral goldfish (Carassius auratus). J. of Parasitology, 92(2):357-363.