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Fine structure of Perkinsus atlanticus n. sp. (Apicomplexa, Perkinsea) parasite of the clam Ruditapes decussatus from Portugal.
- C. Azevedo
- BiologyThe Journal of parasitology
- 1 August 1989
A new apicomplexan species, Perkinsus atlanticus, is described from gill filaments of the clam Ruditapes decussatus (Bivalvia) from Portugal, where it causes great mortality. The zoospores differ…
Morphological characterization of the hemocytes of the clam, Ruditapes decussatus (Mollusca: Bivalvia).
The morphology of hemolymph cells was studied for the first time in Ruditapes decussatus and the existence of hyalinocytes and granulocytes was confirmed by electron microscopy.
Marteiliasis affecting cultured mussels Mytilus galloprovincialis of Galicia (NW Spain). I: Etiology, phases of the infection, and temporal and spatial variability in prevalence
The histological location, morphological fedtures and ultrastructural characters of the sporulation of the parasite causing Marteiliasis affecting cultured mussels in Galicia fit the characteristics…
Perkinsus mediterraneus n. sp., a protistan parasite of the European flat oyster Ostrea edulis from the Balearic Islands, Mediterranean Sea.
- S. Casas, A. Grau, K. Reece, K. Apakupakul, C. Azevedo, A. Villalba
- BiologyDiseases of aquatic organisms
- 10 March 2004
Morphological examinations with light and transmission electron microscopy, DNA sequence-analysis and enlargement in Ray's fluid thioglycollate medium (RFTM), andylogenetic analysis revealed that the ITS sequences of the new species formed a monophyletic group comprising a sister clade to the P. atlanticus/olseni group.
Differential phagocytic ability of the circulating haemocyte types of the carpet shell clam Ruditapes decussatus (Mollusca: Bivalvia).
The ability of clam haemocytes to phagocytose zymosan particles, Vibrio P1 cells and trophozoites of the protistan parasite Perkinsus atlant~cus was demonstrated by means of in vitro assays, however, clam hahemocytes did not phagcytose atlanticus zoospores in the assays.
Is there a plastid in Perkinsus atlanticus (Phylum Perkinsozoa)?
A Possible Life Cycle for Bonamia ostreae on the Basis of Electron Microscopy Studies
A life cycle for this parasite is proposed which includes both intraepithelial and hemocytic phases of proliferation by binary fission and eventual destruction of the cells releasing Bonamia to reinitiate infection of new cells or individuals.
Hemolymph cell types of the mussel Mytilus galloprovincialis
Investigation of circulating hemocytes in Mytilus galloprovincialis hemolymph demonstrated that the granulocytes are an antigenically heterogeneous population.
In vitrostudy of phagocytic ability ofMytilus galloprovincialisLmk. haemocytes
Among the haemocyte types, the granulocytes showed an important phagocytic activity whereas the hyalinocytes did not, thus indicating that mussel haemocytes are functionally heterogeneous.
Enzyme characterisation of the circulating haemocytes of the carpet shell clam,Ruditapes decussatus(Mollusca:bivalvia)
The occurrence of a number of lysosomal enzymes in Ruditapes decussatus haemocytes was demonstrated by cytochemical and colorimetric techniques, consistent with the absence of oxidative metabolism coupled with phagocytosis in haems of this clam species.