Bonamia exitiosus n. sp (Haplosporidia) infecting flat oysters Ostrea chilensis in New Zealand

Type Article
Date 2001-10
Language English
Author(s) Hine P, Cochennec NathalieORCID, Berthe Franck
Affiliation(s) Natl Inst Water & Atmospher Res, Wellington, New Zealand.
IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France.
Source Diseases of aquatic organisms (0177-5103) (Inter-Research), 2001-10 , Vol. 47 , N. 1 , P. 63-72
WOS© Times Cited 78
Keyword(s) New Zealand, 18S rDNA, Ultrastructure, Ostrea chilensis, Bonamia exitiosus
Abstract 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 lipoid bodies and haplosporosomes. We have nearly completely sequenced the small ribosomal gene of the organism from O, chilensis. Initial comparisons of these sequences with those of other protozoans showed similarities to B. ostreae, Polymorphism within Bonamia sp. was confirmed by restriction fragment length polymorphism analysis. On the basis of ultrastructural and molecular considerations it is proposed that this organism be named Bonamia exitiosus sp. nov.
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Hine P, Cochennec Nathalie, Berthe Franck (2001). Bonamia exitiosus n. sp (Haplosporidia) infecting flat oysters Ostrea chilensis in New Zealand. Diseases of aquatic organisms, 47(1), 63-72. Open Access version : https://archimer.ifremer.fr/doc/00000/818/