Can the protozoan parasite Bonamia ostreae infect larvae of flat oysters Ostrea edulis?

Type Article
Date 2011-06
Language English
Author(s) Arzul IsabelleORCID, Langlade Aime2, Chollet Bruno1, Robert Maeva1, Ferrand Sylvie1, Omnes Emmanuelle1, Lerond Sophie1, Couraleau Yann1, Joly Jean-Pierre1, Francois Cyrille1, Garcia Celine1
Affiliation(s) 1 : Inst Francais Rech Exploitat Mer IFREMER, Lab Genet & Pathol LGP, F-17390 La Tremblade, France
2 : Inst Francais Rech Exploitat Mer IFREMER, Lab Environm Ressource Morbihan Pays Loire, F-56470 La Trinite Sur Mer, France
Source Veterinary Parasitology (0304-4017) (Elsevier Science Bv), 2011-06 , Vol. 179 , N. 1-3 , P. 69-76
DOI 10.1016/j.vetpar.2011.01.060
WOS© Times Cited 35
Keyword(s) Bonamia ostreae, Flat oyster, Ostrea edulis, Transmission, Larvae, Parasite life cycle
Abstract Bonamia ostreae is an intracellular protistan parasite affecting flat oysters Ostrea edulis. It can be detected in juveniles but mortalities mainly affect oysters which are more than 2 years old. The parasite is usually observed inside haemocytes and sometimes free, notably in gill epithelia suggesting a parasite release through this organ. However, the infective form and ways of entry and release remain undetermined. Flat oysters incubate their larvae in their pallial cavity for 8–10 days before releasing them into the water column. Flat oysters in Bay of Quiberon in South Brittany (France) are known to be infected with B. ostreae since 1979 and is the most important area in France for O. edulis spat collection. Flat oysters incubating larvae were sampled in this area during summertime between 2007 and 2009. Both adults and larvae were preserved and assayed by PCR and in situ hybridisation (ISH). PCR tests revealed the presence of parasite DNA in some adults and larvae. Specific labelling could be detected by ISH in gills, digestive system, gonad and mantle in adults and in the epithelium surrounding the visceral cavity of some larvae. Our results demonstrate that larvae can be infected with B. ostreae. Larvae might thus contribute to the spread of the parasite during their planktonic life. In addition, their transfer for aquaculture purpose should be controlled especially when they are exported from infected zones.
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Arzul Isabelle, Langlade Aime, Chollet Bruno, Robert Maeva, Ferrand Sylvie, Omnes Emmanuelle, Lerond Sophie, Couraleau Yann, Joly Jean-Pierre, Francois Cyrille, Garcia Celine (2011). Can the protozoan parasite Bonamia ostreae infect larvae of flat oysters Ostrea edulis? Veterinary Parasitology, 179(1-3), 69-76. Publisher's official version : , Open Access version :