Geographical and host distribution patterns of Parvicapsula minibicornis (Myxozoa) small subunit ribosomal RNA genetic types

Atkinson, Stephen D., Jones, Simon R. M., Adlard, Robert D. and Bartholomew, Jerri L. (2011) Geographical and host distribution patterns of Parvicapsula minibicornis (Myxozoa) small subunit ribosomal RNA genetic types. Parasitology, 138 8: 969-977. doi:10.1017/S0031182011000734


Author Atkinson, Stephen D.
Jones, Simon R. M.
Adlard, Robert D.
Bartholomew, Jerri L.
Title Geographical and host distribution patterns of Parvicapsula minibicornis (Myxozoa) small subunit ribosomal RNA genetic types
Formatted title
Geographical and host distribution patterns of Parvicapsula minibicornis (Myxozoa) small subunit ribosomal RNA genetic types
Journal name Parasitology   Check publisher's open access policy
ISSN 0031-1820
1469-8161
Publication date 2011-07
Sub-type Article (original research)
DOI 10.1017/S0031182011000734
Volume 138
Issue 8
Start page 969
End page 977
Total pages 9
Place of publication Cambridge, U.K.
Publisher Cambridge University Press
Collection year 2012
Language eng
Formatted abstract
Parvicapsula minibicornis is a myxozoan parasite implicated in mortalities of both juvenile and pre-spawning adult salmon in the Pacific Northwest of North America. Disease severity and presentation varies between salmon species and geographical localities. To better characterize population structure of the parasite, we sought genetic markers in the P. minibicornis ribosomal RNA gene. We compared samples from California with the type specimen from British Columbia, identified sequence variations, and then sequenced 197 samples from fish, river water and the parasite's polychaete worm host. Although DNA sequences of the parasite were >98·9% similar, there was enough variation to define 15 genotypes. All genotypes were detected in fish samples, although not in all species. A single genotype only was found in sockeye and pink salmon in the Fraser River Basin, but was not detected in sockeye from the adjacent Columbia River Basin. All coho salmon, irrespective of river basin, were infected with a unique mix of 2 genotypes. These data indicated that the P. minibicornis population exhibited strong signals of structuring by both geography and salmonid host species. Particular genotypes may correlate with disease differences seen in salmon populations in the Pacific Northwest.
Keyword Parvicapsula minibicornis
Myxozoa
Genetic types
Salmon parasite
Small subunit ribosomal RNA gene
ssrRNA
Parasite ceratomyxa-shasta
Salmon oncorhynchus-nerka
Juvenile chinook salmon
Klamath river-basin
Sockeye-salmon
British-columbia
Life-cycle
Manayunkia-speciosa
Oregon-california
Pacific salmon
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Chemistry and Molecular Biosciences
 
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