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Appendicitis and Enterobius vermicularis.

B M Wiebe1

  • 1Dept. of Pathology, Sundby Hospital, Copenhagen, Denmark.

Scandinavian Journal of Gastroenterology
|March 1, 1991
PubMed
Summary
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Pinworm (Enterobius vermicularis) infections were found in 4.1% of appendices, particularly in children aged 6-15. Pinworm presence significantly differed between normal and inflamed appendices, suggesting a link to acute appendicitis.

Area of Science:

  • Histopathology
  • Parasitology
  • Gastroenterology

Background:

  • Appendicitis is a common surgical emergency.
  • Enterobius vermicularis (pinworm) is a frequent intestinal parasite.
  • The relationship between pinworm infestation and acute appendicitis requires further investigation.

Purpose of the Study:

  • To determine the incidence of Enterobius vermicularis in surgically removed appendices.
  • To explore the association between pinworm presence and acute appendicitis.

Main Methods:

  • Histologic examination of 2267 appendices from Sundby Hospital, Copenhagen (1980-1987).
  • Identification of E. vermicularis within appendiceal tissues.
  • Statistical analysis comparing pinworm incidence in normal versus inflamed appendices.

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Main Results:

  • Enterobius vermicularis was identified in 4.1% of all examined appendices.
  • The highest incidence of pinworm infestation was observed in the 6- to 15-year age group.
  • A highly significant difference in E. vermicularis incidence was found between normal (6.2%) and inflamed (1.7%) appendices.

Conclusions:

  • The presence of Enterobius vermicularis in the appendix may contribute to acute appendicitis symptoms.
  • Alternatively, pinworms may be expelled from or avoid entering inflamed appendices.
  • Pinworm infestation is a potential, though not sole, factor in appendicitis etiology.