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Related Experiment Videos

Ocular toxocariasis in schoolchildren.

B Good1, C V Holland, M R H Taylor

  • 1Department of Zoology, Trinity College, Dublin 2, Ireland.

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
|August 13, 2004
PubMed
Summary

Ocular toxocariasis, an eye disease caused by Toxocara larvae, affects 6.6 to 9.7 per 100,000 schoolchildren. Geophagia and convulsions were linked to this condition.

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Area of Science:

  • Ophthalmology
  • Infectious Diseases
  • Parasitology

Background:

  • Ocular toxocariasis is a unilateral eye disease caused by Toxocara larvae.
  • Previous prevalence estimates for ocular toxocariasis are limited.
  • Serological data offers little insight into clinical disease presentation.

Purpose of the Study:

  • To determine the prevalence of consultant-diagnosed ocular toxocariasis in schoolchildren.
  • To identify risk factors associated with ocular toxocariasis.

Main Methods:

  • A survey of over 120,000 schoolchildren using questionnaires and follow-up.
  • Case-control studies comparing individuals with ocular toxocariasis to control groups.
  • Inclusion of definite and strongly suspected cases by consultant ophthalmologists.

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Main Results:

  • The prevalence of definite ocular toxocariasis was 6.6 cases per 100,000.
  • Including definite and suspected cases, the prevalence rose to 9.7 per 100,000.
  • Geophagia and a history of convulsions were associated with ocular toxocariasis.

Conclusions:

  • Ocular toxocariasis affects a small but significant number of schoolchildren.
  • Geophagia and convulsions are potential indicators for ocular toxocariasis.
  • Further research is needed to understand the full impact and transmission of ocular toxocariasis.