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Accession no1 Host species (Latin)

Common nameOyster, European Flat Disease/conditionMarteiliasis (Aber disease)
Location (host)Digestive gland epithelium AetiologyMarteilia refringens

Additional informationSpores characterised by the presence of conspicuous refringent granules which can be demonstrated by various histological techniques.
SignificanceSerious pathogen of the flat oyster O.edulis. Can lead to significant mortalities.
LesionNecrosis of tissues caused by the infection in the digestive epithelium. Refractile bodies stain red in this section.
StainsGridley Technique


SubmitterD.J. Alderman Accession date01/04/1977



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