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Predicted Redistribution of Ceratomyxa shasta Genotypes with Salmonid Passage in the Deschutes River, Oregon

Creator:: Stinson, Matthew E. T. and Bartholomew, Jerri L.
Abstract:: Aseries of dams on the Deschutes River, Oregon, act as migration barriers that segregate the river system into upper and lower basins. Proposed fish passage between basins would reunite populations of native potamodromous fish and allow anadromous fish of Deschutes River origin access to the upper basin. We assessed the...
Resource Type:: Article
Full Text:: Deschutes River, Oregon Matthew E. T. Stinson and Jerri L. Bartholomew* Department of Microbiology, Oregon

Widespread distribution of Ceratonova shasta (Cnidaria: Myxosporea) genotypes indicates evolutionary adaptation to its salmonid fish hosts

Creator:: Stinson, Matthew E. T., Atkinson, Stephen D., and Bartholomew, Jerri L.
Abstract:: The distribution of the freshwater myxozoan parasite Ceratonova shasta in the Pacific Northwest of North America is limited to overlap in the ranges of its 2 hosts: the polychaete Manyunkia sp., and Pacific salmonids. Studies in the Klamath River (Oregon/California) and Deschutes River (Oregon), showed that the parasite population is...
Resource Type:: Article
Full Text:: Jerri L. Bartholomew at: jerri.bartholomew@oregonstate.edu ABSTRACT: The distribution of the freshwater

Relationship Between Temperature and Ceratomyxa shasta–Induced Mortality In Klamath River Salmonids

Creator:: Ray, R. Adam, Holt, Richard A., and Bartholomew, Jerri L.
Abstract:: Water temperature influences almost every biological and physiological process of salmon, including disease resistance. In the Klamath River (California), current thermal conditions are considered sub-optimal for juvenile salmon. In addition to borderline temperatures, these fish must contend with the myxozoan parasite Ceratomyxa shasta, a significant cause of juvenile salmonid mortality...
Resource Type:: Article
Full Text:: MORTALITY IN KLAMATH RIVER SALMONIDS R. Adam Ray, Richard A. Holt*, and Jerri L. Bartholomew*� Department

Dam Removal and Implications for Fish Health: Ceratomyxa shasta in the Williamson River, Oregon, USA

Creator:: Hurst, Charlene N., Holt, Richard A., and Bartholomew, Jerri L.
Abstract:: The removal of dams on a river is one potential tool for the ecological restoration of native salmonid fishes. However, the removal of barriers also introduces risks, such as the introduction of fish pathogens into previously isolated populations. The proposed removal of four dams on the Klamath River, Oregon–California, provides...
Resource Type:: Article
Full Text:: , Oregon, USA Charlene N. Hurst, Richard A. Holt, and Jerri L. Bartholomew* Department of Microbiology

Effect of Nanophyetus salmincola and Bacterial Co-Infection on Mortality of Juvenile Chinook Salmon

Creator:: Roon, Sean R., Alexander, Julie D., Jacobson, Kym C., and Bartholomew, Jerri L.
Abstract:: The freshwater trematode Nanophyetus salmincola has been demonstrated to impair salmonid immune function and resistance to the marine pathogen Vibrio anguillarum, potentially resulting in ocean mortality. We examined whether infection by the parasite N. salmincola similarly increases mortality of juvenile Chinook Salmon Oncorhynchus tshawytscha when they are exposed to the...
Resource Type:: Article
Full Text:: , Newport, Oregon 97365, USA Jerri L. Bartholomew* Department of Microbiology, Oregon State University, 226

Using Cure Models for Analyzing the Influence of Pathogens on Salmon Survival

Creator:: Ray, R. Adam, Perry, Russell W., Som, Nicholas A., and Bartholomew, Jerri L.
Abstract:: Parasites and pathogens influence the size and stability of wildlife populations, yet many population models ignore the population-level effects of pathogens. Standard survival analysis methods (e.g., accelerated failure time models) are used to assess how survival rates are influenced by disease. However, they assume that each individual is equally susceptible...
Resource Type:: Article
Full Text:: Survival Ray, R. A., Perry, R. W., Som, N. A., & Bartholomew, J. L. (2014). Using Cure Models for

Supplemental Description of Myxobolus squamalis (Myxozoa)

Creator:: Polley, Tamsen M., Atkinson, Stephen D., Jones, Gerald R., and Bartholomew, Jerri L.
Abstract:: Abstract: Myxobolus squamalis is a myxozoan skin parasite first reported from rainbow trout (Oncorhynchus mykiss). Identification of the parasite based on myxospore morphology is unreliable because M. squamalis is similar to several other myxobolids that share host species and geographic ranges. The only ssrRNA gene sequence available for M. squamalis...
Resource Type:: Article
Full Text:: . Atkinson, Gerald R. Jones*, and Jerri L. Bartholomew, Department of Microbiology, Oregon State University

Transmission and Persistence of Ceratomyxa shasta, Transmission and Persistence of Ceratomyxa shasta in Chinook Salmon

Creator:: Wong, Peter, Hurst, Charlene N., Ray, R. Adam, and Bartholomew, Jerri L.
Abstract:: Native to the Pacific Northwest, Ceratomyxashastais a myxosporeanparasite that infects wild and cultivated salmon and has a significance impact on its population in the Klamath River basin. The study suggests that the transmission of mixed genotypes of the parasite are common in Chinook salmon but the age of the fish...
Resource Type:: Poster and Presentation

Density of the Waterborne Parasite Ceratomyxa shasta and Its Biological Effects on Salmon

Creator:: Hallett, Sascha L., Ray, R. Adam, Hurst, Charlene N., Holt, Richard A., Buckles, Gerri R., Atkinson, Stephen D., and Bartholomew, Jerri L.
Abstract:: The myxozoan parasite Ceratomyxa shasta is a significant pathogen of juvenile salmonids in the Pacific Northwest of North America and is limiting recovery of Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon populations in the Klamath River. We conducted a 5-year monitoring program that comprised concurrent sentinel fish exposures and...
Resource Type:: Article
Full Text:: @science.oregonstate.edu, or Jerri L. Bartholomew, bartholj@science.oregonstate.edu. Supplemental material for this

Defenses of Susceptible and Resistant Chinook Salmon (Onchorhynchus tshawytscha) Against the Myxozoan Parasite Ceratomyxa shasta

Creator:: Bjork, Sarah J., Zhang, Yong-An, Hurst, Charlene N., Alonso-Naveiro, Maria E., Alexander, Julie D., Sunyer, J. Oriol, and Bartholomew, Jerri L.
Abstract:: We investigated intra-specific variation in the response of salmon to infection with the myxozoan Ceratomyxa shasta by comparing the progress of parasite infection and measures of host immune response in susceptible and resistant Chinook salmon Oncorhynchus tshawytscha at days 12, 25 and 90 post exposure. There were no differences in...
Resource Type:: Article
Full Text:: , Y. A., Hurst, C. N., Alonso-Naveiro, M. E., Alexander, J. D., Sunyer, J. O., & Bartholomew, J. L

ScholarsArchive@OSU

Predicted Redistribution of Ceratomyxa shasta Genotypes with Salmonid Passage in the Deschutes River, Oregon

Widespread distribution of Ceratonova shasta (Cnidaria: Myxosporea) genotypes indicates evolutionary adaptation to its salmonid fish hosts

Relationship Between Temperature and Ceratomyxa shasta–Induced Mortality In Klamath River Salmonids

Dam Removal and Implications for Fish Health: Ceratomyxa shasta in the Williamson River, Oregon, USA

Effect of Nanophyetus salmincola and Bacterial Co-Infection on Mortality of Juvenile Chinook Salmon

Using Cure Models for Analyzing the Influence of Pathogens on Salmon Survival

Supplemental Description of Myxobolus squamalis (Myxozoa)

Transmission and Persistence of Ceratomyxa shasta, Transmission and Persistence of Ceratomyxa shasta in Chinook Salmon

Density of the Waterborne Parasite Ceratomyxa shasta and Its Biological Effects on Salmon

Defenses of Susceptible and Resistant Chinook Salmon (Onchorhynchus tshawytscha) Against the Myxozoan Parasite Ceratomyxa shasta

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