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| Hine, P; Bower, S; Meyer, G; Cochennec, Nathalie; Berthe, Franck. |
| An ultrastructural study was carried out on Mikrocytos mackini, the cause of Denman Island disease in Pacific oysters Crassostrea gigas in western Canada. Three forms were identified, quiescent cells (QC), vesicular cells (VC) and endosomal cells (EC), QC occurred in the vesicular connective tissue (VCT), haemocytes (hyalinocytes), adductor and heart myocytes, and extracellularly, They had a central round to ovoid nucleus, <7 cisternae of inactive nuclear membrane-bound Golgi, few vesicles and lysosome-like bodies. VC were rarely extracellular and usually occurred in adductor and heart myocytes, in close association with host cell mitochondria. The contents of the host cell mitochondria appeared to pass through a tubular extension into the cytoplasm of... |
| Tipo: Text |
Palavras-chave: Denman Island disease; Amitochondriate protozoan; Ultrastructure; Crassostrea gigas; Mikrocytos mackini. |
| Ano: 2001 |
URL: https://archimer.ifremer.fr/doc/2001/publication-815.pdf |
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| Hine, P; Cochennec, Nathalie; Berthe, Franck. |
| Bonamia sp. is a pathogenic parasite that occurs in the haemocytes of dredge oysters Ostrea chilensis Philippi in New Zealand, Ultrastructurally it resembles other haplosporidians in the possession of haplosporosomes, haplosporogenesis, persistence of mitotic microtubules during interphase and of the nuclear envelope during mitosis, and occurrence of a diplokaryotic or multi-nucleate plasmodial stage. Another stage containing a large vacuole derived from enlargement of 1 or more mitochondria has not previously been described from other haplosporidians. It most closely resembles B, ostreae Pichot et al., 1979, which parasitises and is pathogenic in haemocytes of European flat oysters, O. edulis. However, B. ostreae is smaller and denser, and has fewer... |
| Tipo: Text |
Palavras-chave: New Zealand; 18S rDNA; Ultrastructure; Ostrea chilensis; Bonamia exitiosus. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-818.pdf |
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