DAO 23:153-159 (1995)  -  doi:10.3354/dao023153

Chlamydia-like organisms in ctenidia and mantle cells of the Japanese oyster Crassostrea gigas from the French Atlantic coast

Renault T, Cochennec N

Grossly visible lesions of the ctenidia and occasional mortalities in Japanese oyster Crassostrea gigas from the Atlantic French coast were reported in 1992-1993. From August 1992 to March 1993, 235 living oysters were collected to determine the cause of tissue lesions and mortalities. Microscopical examination of fixed, stained sections revealed that 53.2% of these oysters had ctenidia and mantle lesions associated with irregular basophilic and Feulgen positive cytoplasmic inclusion bodies. Ultrastructurally, the infectious agent was a chlamydia-like organism. Indirect fluorescent and peroxidase conjugated antibody tests suggested that this agent might share common antigens with the procaryotic agent Chlamydia psittaci, strain ovis.


Crassostrea gigas . Pacific oyster . Chlamydia-like organisms . Ctenidia . Mantle


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