The Gill Pathogen Dermocystidium salmonis in Oregon Salmonids Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/cc08hg185

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  • Intense infections of the gill pathogen Dermocystidium salmonis were associated with mortality of prespawning chinook salmon Oncorhynchus tshawytscha in several Oregon rivers in 1988. The occurrence of the pathogen in returning adult chinook salmon was monitored in several coastal Oregon stocks from 1989 to 1993. Although the prevalence of the pathogen was high in these fish (up to 66.6%), infection intensities were generally low, and no mortality attributable to D. salmonis was observed. In 1988, the pathogen was associated with a lethal epizootic among juvenile chinook salmon smolts at the Trask State Fish Hatchery near Tillamook, Oregon. Histological examination of gills from heavily infected fish revealed hyperplasia of gill epithelium and fusion of gill lamellae. When naturally infected smolts were transferred from fresh to salt water, the most heavily infected fish died within 10 d, and the number of D. salmonis cysts declined and disappeared from previously infected salmon after 21-42 d.
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  • Olson, R. E., & Holt, R. A. (1995, June). The Gill Pathogen Dermocystidium salmonis in Oregon Salmonids. Journal of Aquatic Animal Health, 7(2), 111-117.
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  • description.provenance : Submitted by Judy Mullen (judy.mullen@oregonstate.edu) on 2011-10-17T23:45:23Z No. of bitstreams: 1 TheGillPathogenDermocystidium.pdf: 1551892 bytes, checksum: 81984d3e5f749fb06295406e77f550c7 (MD5)
  • description.provenance : Made available in DSpace on 2011-11-03T15:55:05Z (GMT). No. of bitstreams: 1 TheGillPathogenDermocystidium.pdf: 1551892 bytes, checksum: 81984d3e5f749fb06295406e77f550c7 (MD5) Previous issue date: 1995-06
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2011-11-03T15:55:05Z (GMT) No. of bitstreams: 1 TheGillPathogenDermocystidium.pdf: 1551892 bytes, checksum: 81984d3e5f749fb06295406e77f550c7 (MD5)

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