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| Carnegie, Ryan; Cochennec, Nathalie. |
| Our understanding of the microcell oyster parasites of the genera Bonamia and Mikrocytos has expanded in recent years with the application of ultrastructural and especially molecular biological research approaches. Molecular phylogenetic analyses of SSU rRNA genes have united three species, Bonamia ostreae, Bonamia exitiosa, and Mikrocytos (now Bonamia) roughleyi, in a microcell clade within the Haplosporidia, supporting both early and recent ultrastructural observations. Ultrastructural and molecular phylogenetic evidence has emerged that Mikrocytos mackini, on the other hand, is a unique protist with unusual adaptations for a parasitic existence. DNA probes and polymerase chain reaction (PCR) assays promise new insights into the life cycles,... |
| Tipo: Text |
Palavras-chave: Mikrocytos; Bonamia; Microcell. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/2004/publication-408.pdf |
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| Cochennec, Nathalie; Reece, K.; Berthe, Franck; Hine, Mike. |
| Microcell-type parasites of oysters are associated with a complex of diseases in different oyster species around the world. The etiological agents are protists of very small size that are very difficult to characterize taxonomically. Associated lesions may vary according to the host species, and their occurrence may be related to variations in tissue structure. Lesion morphology cannot be used to distinguish the different agents involved. Ultrastructural observations on Mikrocytos roughleyi revealed similarities with Bonamia spp., particularly in regard to the presence of electron-dense haplosporosomes and mitochondria, whose absence from M mackini also indicate that M roughleyi and M mackini are not congeneric. A partial small subunit (ssu) rRNA gene... |
| Tipo: Text |
Palavras-chave: Small subunit rDNA; Taxonomy; Microcell; Bonamosis; Saccostrea glomerata; Mikrocytos roughleyi. |
| Ano: 2003 |
URL: https://archimer.ifremer.fr/doc/2003/publication-2816.pdf |
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