Parasitology Research

, Volume 94, Issue 3, pp 163–175 | Cite as

Neuromusculature of Macrogyrodactylus clarii, a monogenean gill parasite of the Nile catfish Clarias gariepinus in Egypt

  • M. M. El-Naggar
  • S. Z. Arafa
  • S. A. El-Abbassy
  • M. T. Stewart
  • D. W. Halton
Original Paper


Phalloidin fluorescence technique, enzyme cytochemistry and immunocytochemistry in conjunction with confocal scanning laser microscopy have been used for the first time to describe the nervous and muscle systems of the viviparous monogenean gill parasite, Macrogyrodactylus clarii. The gross spatial arrangement of muscle and associated cholinergic, peptidergic and aminergic innervations has been examined. The central nervous system (CNS) consists of paired cerebral ganglia from which emanate three pairs of longitudinal ventral, lateral and dorsal nerve cords, connected at intervals by transverse connectives. The CNS is better developed ventrally than dorsally or laterally, and has the strongest reactivity for all neuroactive substances examined. Structural and functional correlates of the neuromusculature of the pharynx, haptor and reproductive tracts have been examined. Results implicate acetylcholine, FMRFamide-related peptides (FaRPs) and serotonin in sensory and motor function in this monogenean, although confirmatory physiological data are obviously required.


Nerve Cord Ventral Nerve Cord Cerebral Ganglion Male Copulatory Organ Extrinsic Muscle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • M. M. El-Naggar
    • 1
  • S. Z. Arafa
    • 1
  • S. A. El-Abbassy
    • 1
  • M. T. Stewart
    • 2
  • D. W. Halton
    • 2
  1. 1.Zoology Department, Faculty of ScienceMansoura UniversityMansouraEgypt
  2. 2.Parasitology Research Group, Biology and Biochemistry, Medical Biology CentreQueen’s University BelfastBelfastUK

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