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Kudoa azevedoi n. sp. (Myxozoa, Multivalvulida) from the oocytes of the Atlantic horse mackerel Trachurus trachurus (Perciformes, Carangidae) in Tunisian coasts

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Abstract

A new species Kudoa azevedoi sp. n. (Myxozoa, Multivalvulida) is described in Trachurus trachurus Linnaeus, 1758 (Carangidae) from fishing harbors in Tunisian coasts using spore morphology and SSU rDNA sequence data. The parasite occurs only in ovaries within oocytes of mature and immature specimens. Spores are quadrate in shape in apical view with rounded edges, having four shell valves and four symmetrical polar capsules. They are of small sizes and measure 3.5 ± 0.41 (3–4.2) × 4.5 ± 0.44 (4–5.2) length by width. The polar capsules are pyriform in shape measuring 1.5 ± 0.22 (1.5–2) × 0.75 ± 0.14 (0.5–1) μm. Infected oocytes are hypertrophied, whitish colored, and filled with mature spores. Plasmodia are tubular and ramified from the inner membrane toward the center of the oocyte. Phylogenetic analysis based on small subunit ribosomal DNA sequences shows the highest similarity (96 %) with the ovary parasite Kudoa ovivora. Some morphological details and spore dimensions support the creation of a new species in the genus Kudoa. Mean prevalence among examined females is of about 55.5 %. It varies between localities and length of fish. The present myxosporea is the second Kudoa species reported in fish ovaries.

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Acknowledgments

The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding the work through the research group project NoRGP-VPP-164

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All the experiments comply with the current laws of the country in which they were performed.

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The authors declare that they have no conflict of interest.

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  1. Zoology Department, College of Science, King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia

    Lamjed Mansour, Abdul Halim Harrath & Suliman Y. Al Omar

  2. Unité de Recherche de Biologie Ecologie et Parasitologie des Organismes aquatiques, Département de Biologie, Faculté des Sciences de Tunis, Université de Tunis El-Manar Tunis, Tunis, Tunisia

    Aouatef Thabet, Kalthoum Chourabi & Oum Kalthoum Ben Hassine

  3. Maher Gtari, Laboratoire Microorganismes & Biomolécules Actives Université Tunis Elmanar (FST) & Université de Carthage (ISSTE), Tunis, Tunisia

    Mahr Gtari

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Mansour, L., Thabet, A., Chourabi, K. et al. Kudoa azevedoi n. sp. (Myxozoa, Multivalvulida) from the oocytes of the Atlantic horse mackerel Trachurus trachurus (Perciformes, Carangidae) in Tunisian coasts. Parasitol Res 112, 1737–1747 (2013). https://doi.org/10.1007/s00436-013-3332-4

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