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Jones, S.R.M., G. Prosperi-Porta & & E. Kim. (2012). The Diversity of Microsporidia in Parasitic Copepods (Caligidae: Siphonostomatoida) in the Northeast Pacific Ocean with Description of Facilispora margolisi n. g., n. sp. and a new Family Facilisporidae n. fam. Journal of Eukaryotic Microbiology. 59(3): 206-217.
193331
10.1111/j.1550-7408.2011.00614.x [view]
Jones, S.R.M., G. Prosperi-Porta & & E. Kim
2012
The Diversity of Microsporidia in Parasitic Copepods (Caligidae: Siphonostomatoida) in the Northeast Pacific Ocean with Description of Facilispora margolisi n. g., n. sp. and a new Family Facilisporidae n. fam.
Journal of Eukaryotic Microbiology
59(3): 206-217
Publication
Available for editors  PDF available [request]
Three distinct microsporidia were identified from parasitic copepods in the northeast Pacific Ocean. Sequencing and phylogenetic analysis of a partial small subunit ribosomal RNA gene (SSU rDNA) sequence identified a genetically distinct variety of Desmozoon lepeophtherii from Lepeophtheirus salmonis on cultured Atlantic salmon Salmo salar, and this was confirmed by transmission electron microscopy. Phylogenetic analysis resolved the SSU rDNA sequence of the second organism in a unique lineage that was most similar to microsporidia from marine and brackish water crustaceans. The second occurred in L. salmonis on Atlantic, sockeye Oncorhynchus nerka, chum O. keta and coho O. kisutch salmon, in Lepeophtheirus cuneifer on Atlantic salmon, and in Lepeophtheirus parviventris on Irish Lord Hemilepidotus hemilepidotus. Replication occurred by binary fission during merogony and sporogony, diplokarya were not present, and all stages were in contact with host cell cytoplasm. This parasite was identified as Facilispora margolisi n. g., n. sp. and accommodated within a new family, the Facilisporidae n. fam. The third, from Lepeophtheirus hospitalis on starry flounder Platichthys stellatus, was recognized only from its unique, but clearly microsporidian SSU rDNA sequence. Phylogenetic analysis placed this organism within the clade of microsporidia from crustaceans.
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