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Development and morphological variability of Echinococcus granulosus

P Dubinský1, A Stefancíková, L Turceková

  • 1Parasitological Institute, Slovak Academy of Sciences, Kosice, Slovak Republic. pausav@saske.sk

Parasitology Research
|April 1, 1998
PubMed
Summary

This study details Echinococcus granulosus strobila characteristics from pigs, noting significant variability in hook number, testes, and uterus shape. These findings highlight potential overlaps with other Echinococcus species strains.

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Area of Science:

  • Veterinary Parasitology
  • Helminthology
  • Molecular Biology

Background:

  • Echinococcus granulosus is a significant zoonotic parasite causing cystic echinococcosis.
  • Understanding parasite strain variability is crucial for disease control and diagnosis.
  • Previous research has characterized different strains of E. granulosus from various hosts.

Purpose of the Study:

  • To characterize the strobila of Echinococcus granulosus derived from a single cyst in a domestic pig.
  • To analyze the morphological variability within this E. granulosus clone.
  • To compare these characteristics with known strains of E. granulosus and Echinococcus multilocularis.

Main Methods:

  • Experimental infection of dogs with protoscolices from a pig liver cyst.

Related Experiment Videos

  • Morphological analysis of adult Echinococcus granulosus strobila.
  • Detailed examination of scolex hooks, testes distribution, ovary, and uterus morphology.
  • Assessment of parasite development rate.

    • Main Results:

    • Adult cestodes exhibited 28-32 hooks with high variability in shape and size.
    • Testes (26-51) were predominantly located throughout the proglottis.
    • Uterus morphology showed significant variation: 10% spherical, 62% saccular with lateral sacculations, 27% saccular without, and 1% tubular/ramified.
    • Development rate was intermediate, with adult worms observed between 40-44 days post-infection.

    Conclusions:

    • The studied Echinococcus granulosus clone displayed considerable morphological variability.
    • Observed taxonomic characters showed overlap with pig, sheep, and cattle strains of E. granulosus and E. multilocularis.
    • Further research is needed to clarify the taxonomic status and implications of this variability.