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Acta Protozoologica

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Perkinsus sp. (Alveolata, Perkinsidae) a Parasite of the Clam Meretrix meretrix (Veneridae) from Arabian Gulf: Ultrastructural Observations of the Trophozoites and the Cellular Response of the Host

Publication date: 26.05.2014

Acta Protozoologica, 2014, Volume 53, Issue 2, pp. 215 - 221

https://doi.org/10.4467/16890027AP.14.018.1599

Authors

,
Abdel-Azeem S. Abdel-Baki
Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia; Zoology Department, Faculty of Science, Beni-Suef University, Egypt
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,
Saleh Al-Quraishy
Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
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,
Mohamed A. Dkhil
Department of Zoology and Entomology, Faculty of Science, Helwan University, Egypt
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,
Elsa Oliveira
Laboratory of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), University of Porto, Portugal
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,
Graça Casal
Laboratory of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), University of Porto, Portugal
Department of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), and Laboratory of Pathology, Centre for Marine and Environmental Research (CIIMAR/UP), University of Porto, Portugal; Departmento de Ciências, Instituto Superior de Ciências da Saúde, Gandra, Portugal;
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Carlos Azevedo
King Saud University, Riyadh, Saudi Arabia
Department of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), and Laboratory of Pathology, Centre for Marine and Environmental Research (CIIMAR/UP), University of Porto, Portugal; Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia;
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Abstract

Genus Perkinsus Levine, 1978 (Alveolata, Perkinsidae) an intracellular pathogenic parasite is described from the mantle and gill filaments of a commercially important clam, Meretrix meretrix, collected from the Arabian Gulf, Saudi Arabia. This genus contains currently seven named species: P. marinus, P. olseni (P. atlanticus), P. chesapeaki (P. andrewsi), P. mediterraneus, P. honshuensis, P. beihaiensis and P. qugwadi. Meanwhile, some unnamed Perkinsus sp. have been described in wide variety of mollusc species. Ultrastructural features of Perkinsus sp. trophozites and the host reaction are described. The different developmental stages of trophozoites appeared as single or grouped cells surrounded by amorphous material that constituted cysts or nodules randomly distributed throughout the connective tissue of the mantle. The early trophozoites were generally spherical to ellipsoidal with a circular nucleus containing a prominent central nucleolus. The cytoplasm had several small vacuoles which coalesce to form a great vacuole in the later trophozoites and the nucleus becomes eccentric. Some lomosomes were observed between the wall and the plasmalemma of trophozoites. A large number of degraded and pyknotic cell and several cellular structure with lysed aspects were encountered in the surrounding area near the cysts. Ultrastructural data showed that the lysed granular cells and the coalescence of the granules result in the cyst that encapsulates various trophozoites. In the current study, we describe for the first time the presence of Perkinsus sp. as well as the host reaction in clams from the Saudi Arabian coasts.

Information

Information: Acta Protozoologica, 2014, pp. 215 - 221

Article type: Original research article

Authors

Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia; Zoology Department, Faculty of Science, Beni-Suef University, Egypt

Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia

Department of Zoology and Entomology, Faculty of Science, Helwan University, Egypt

Laboratory of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), University of Porto, Portugal

Laboratory of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), University of Porto, Portugal

Department of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), and Laboratory of Pathology, Centre for Marine and Environmental Research (CIIMAR/UP), University of Porto, Portugal; Departmento de Ciências, Instituto Superior de Ciências da Saúde, Gandra, Portugal;

King Saud University, Riyadh, Saudi Arabia

Department of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), and Laboratory of Pathology, Centre for Marine and Environmental Research (CIIMAR/UP), University of Porto, Portugal; Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia;

Published at: 26.05.2014

Article status: Open

Licence: None

Percentage share of authors:

Abdel-Azeem S. Abdel-Baki (Author) - 16%
Saleh Al-Quraishy (Author) - 16%
Mohamed A. Dkhil (Author) - 16%
Elsa Oliveira (Author) - 16%
Graça Casal (Author) - 16%
Carlos Azevedo (Author) - 20%

Article corrections:

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Publication languages:

English

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Number of downloads: 2688