Acta Parasitologica

, Volume 54, Issue 2, pp 103–112 | Cite as

Mode of attachment and histopathological effects of Macrogyrodactylus clarii, a monogenean gill parasite of the catfish Clarias gariepinus, with a report on host response

  • Safaa Z. Arafa
  • Mohammed M. El-Naggar
  • Samir A. El-Abbassy
Article

Abstract

A detailed account is given about the mode of attachment and histopathological effects of Macrogyrodactylus clarii Gussev, 1961, a viviparous monogenean from the gills of the catfish Clarias gariepinus. Most parasites attach their haptors to the proximal region of the gill filament (primary gill lamellae), while few specimens were seen attached to the distal region. Attachment of the haptor was achieved mainly by the blade of the hamuli, but no evidence was found indicating the participation of marginal hooklets in the attachment. The hamuli of M. clarii penetrate into the interlamellar epithelium of the gill tissue. Some evidences were found to indicate that M. clarii may also utilize suction force during haptoral attachment. The pathological effects of M. clarii are manifested by breakdown of the coating epithelium, necrosis of the epithelial cells, vacuolations inside and outside the host cells, fusion of the gill lamellae, rupture of blood capillaries, infiltration of erythrocytes and degeneration and fibrosis of the interlamellar epithelium. The host response includes the appearance of lymphocytes, mucoid secretions and hyperplasia of the tissue at the site of attachment.

Keywords

Monogenea Macrogyrodactylus clarii Clarias gariepinus histopathological effects host response 

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Copyright information

© © Versita Warsaw and Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Safaa Z. Arafa
    • 1
  • Mohammed M. El-Naggar
    • 1
  • Samir A. El-Abbassy
    • 1
  1. 1.Zoology Department, Faculty of ScienceMansoura UniversityMansouraEgypt

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