TY - SER AU - Azevedo,Carlos AU - Padovan,I. AU - Corral,Laura AU - Padovan,P. TI - Ultrastructural description of an unidentified apicomplexan oocyst containing bacteria-like hyperparasites in the gill of Crassostrea rizophorae KW - Bacterias KW - Ultrastructure N1 - Azevedo, C-Departament of cell biology, Institute of Biomedical Sciences, University of Porto, Largo Abel Salazar nº2, 4099-003 Porto, Portugal ER -