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Nematode transmission patterns.

R C Anderson1

  • 1Department of Zoology, College of Biological Science, University of Guelph, Ontario, Canada.

The Journal of Parasitology
|February 1, 1988
PubMed
Summary
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This review explores nematode parasite transmission strategies in vertebrates, including monoxeny, heteroxeny, paratenesis, and precocity. Understanding these complex life cycles is crucial for controlling parasitic infections.

Area of Science:

  • Veterinary Parasitology
  • Helminthology
  • Evolutionary Biology

Background:

  • Nematode parasites of vertebrates exhibit diverse transmission strategies.
  • Understanding these strategies is key to controlling parasitic diseases and their impact on animal health.

Purpose of the Study:

  • To review and categorize the transmission phenomena of vertebrate nematode parasites.
  • To elucidate the roles of monoxeny, heteroxeny, paratenesis, and precocity in nematode life cycles.

Main Methods:

  • Literature review and synthesis of existing research on nematode transmission.
  • Classification of monoxeny into primary and secondary types.
  • Analysis of host-parasite interactions in various nematode groups.

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Main Results:

  • Monoxeny (single-host transmission) is categorized into primary (no intermediate host) and secondary (lost intermediate host).
  • Heteroxeny (multiple hosts) involves specific intermediate hosts utilized by groups like Spirurida (arthropods), Metastrongyloidea (molluscs), and Ascaridida.
  • Paratenesis (transport hosts) is common in carnivore parasites, potentially evolving into intermediate hosts. Precocity (accelerated development) aids reproduction and host transfer.

Conclusions:

  • Nematode transmission strategies are diverse and have evolved complex mechanisms for propagation.
  • Paratenesis and precocity represent significant adaptations influencing parasite life cycles and host-parasite dynamics.
  • Further research into these phenomena can inform novel control strategies for nematode infections in vertebrates.