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Parasitology Research

, Volume 114, Issue 8, pp 2941–2949 | Cite as

Some pathophysiological insights into ovarian infestation by Myxobolus sp. (Myxozoa: Myxosporea) in Clarias gariepinus (Clariids: Silurids) from Bénin (West Africa)

  • Adam GbankotoEmail author
  • Nounagnon Darius Tossavi
  • Mariette Sindété
  • Gilbert Nestor Sakiti
  • Kabirou Moutaïrou
  • Anne-Cécile Ribou
Original Paper

Abstract

Mature female specimens of the catfish Clarias gariepinus originating from Ouémé River (Benin) were investigated into ovarian myxozoan parasites. Spores of Myxobolus sp. (Myxozoa: Myxosporea) were found encrusted in the whitish color oocytes which present fat dot aspect in the gonads. The pathological investigation by electron microscopy revealed that maturation and multiplication of spores induced lytic action, deformation and dysfunction of the oocyte internal structures. No host inflammatory reaction was observed, while yolk, lipid, mitochondria, and other oocyte components were degenerated inducing empty area in the oocyte and could lead to castration in case of wide infestation. The mean prevalence was 19.79 %. No significant difference was observed within seasonal prevalence (χ2 = 1.771; df = 3; p > 0.05). Though the host length classes ranging from 35 to 39 cm and 40 to 45 cm were more infected, difference was not significant (χ2 = 2.273; df = 4; p > 0.05) within them. The spores are ovoid in shape with two polar capsules which are equal in size, pyriform, and converging in anterior part of spore with four to five polar filament turns. Spore body are (11.47 ± 0.67) × (8.19 ± 0.52) μm length by width while polar capsule size are (4.24 ± 0.25) × (3.07 ± 0.28) μm and located in the first third portion of the spore. The molecular approaches are still running for accurate identification of this parasite.

Keywords

Pathology Oocytes Myxobolus sp. Clarias gariepinus Prevalence 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Adam Gbankoto
    • 1
    • 4
    Email author
  • Nounagnon Darius Tossavi
    • 2
  • Mariette Sindété
    • 1
  • Gilbert Nestor Sakiti
    • 2
  • Kabirou Moutaïrou
    • 3
  • Anne-Cécile Ribou
    • 4
  1. 1.Département de Physiologie Animale, Faculté des Sciences et TechniquesUniversité d’Abomey-CalaviCotonouBénin
  2. 2.Département de Zoologie, Faculté des Sciences et TechniquesUniversité d’Abomey-CalaviCotonouBénin
  3. 3.Département de Biochimie et Biologie Cellulaire, Faculté des Sciences et TechniquesUniversité d’Abomey-CalaviCotonouBénin
  4. 4.Institut de Modélisation et d’Analyses en Géo-Environnement et Santé, EA 4218Université de Perpignan Via DomitiaPerpignanFrance

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