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Purification of Rickettsiales-like organisms associated with Pecten maximus (Mollusca Bivalvia): serological and biochemical characterization

1992; Inter-Research; Volume: 12; Linguagem: Inglês

10.3354/dao012215

1616-1580

G Le Gall, Eric Mialhe,

Calcium Carbonate Crystallization and Inhibition

Significant mortalibes have been observed in populations of Saint-Jacques scallops Pecten maximus, in association with numerous intracellular colonies of kckettsiales-like organisms (RLO) in the gills.Isolation of the procaryotes from infected tissues and their subsequent purification were achieved by a specific protocol based on differential and isopycnic centrifugations on sucrose and renografin density gradients.The purity and integrity of purified procaryotes were verified by electron microscopy.Specific polyclonal antibodies were prepared for serological characterization.Fifteen major constituent proteins were electrophoretically identified, their molecular weights ranging between 148 and 16 kD.Ten enzyme activities were biochemically identified, including acid phosphatase and catalase, which could be related to procaryote pathogenicity.