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First detection of the protozoan parasite Bonamia exitiosa (Haplosporidia) infecting flat oyster Ostrea edulis grown in European waters
Abollo, E.; Ramilo, A.; Casas, S.M.; Comesaña, P.; Cao, A.; Carballal, M.J.; Villalba, A. (2008). First detection of the protozoan parasite Bonamia exitiosa (Haplosporidia) infecting flat oyster Ostrea edulis grown in European waters. Aquaculture 274(2-4): 201-207. hdl.handle.net/10.1016/j.aquaculture.2007.11.037
In: Aquaculture. Elsevier: Amsterdam; London; New York; Oxford; Tokyo. ISSN 0044-8486, more
Peer reviewed article  

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Keywords
    Bivalvia [WoRMS]; Bonamia Pichot, Comps, Tigé, Grizel & Rabouin, 1980 [WoRMS]; Ostrea edulis Linnaeus, 1758 [WoRMS]; Marine
Author keywords
    Bonamia; Ostrea edulis; Haplosporidian; Phylogenetics; Small subunit ribosomal DNA; Bivalve mollusc

Authors  Top 
  • Abollo, E.
  • Ramilo, A.
  • Casas, S.M.
  • Comesaña, P.
  • Cao, A.
  • Carballal, M.J.
  • Villalba, A.

Abstract
    The haplosporidian Bonamia exitiosa was found infecting the European flat oyster Ostrea edulis in the Galician coast (NW Spain), which represents the first report of this parasite along European waters. Histopathology and molecular characterization of the small subunit ribosomal DNA gene were performed to identify this species. Examination of histological sections showed two microcell types, the smaller one corresponding to Bonamia ostreae and the larger one to B. exitiosa. Phylogenetic analysis places the sequence herein reported in a clade with Bonamia species of the Southern hemisphere, namely B. exitiosa, B. roughleyi and Bonamia sp. from North Carolina and Chile. Subsequent PCR-RFLPs analysis showed a highly-endemiotopic infection by B. exitiosa, demonstrating the success of this haplosporidian to infect the European flat oyster in the Galician marine ecosystem even in concurrent infections with B. ostreae.

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