Parasitic infections in asymptomatic homosexual men - Cost-effective screening

Wendy Levinson, Patrick M. Dunn, Thomas G. Cooney, James H. Sampson

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The purpose of this study was to develop a cost-effective strategy for screening for enteric protozoan infections in homosexual men without gastrointestinal symptoms suggesting infection. One hundred and one homosexual men in Portland, Oregon, each submitted at least one unpurged stool sample: 91% submitted three samples each. Of these, 27% had Entamoeba histolytica, 61% had nonpathogenic protozoa with or without E. histolytica, 36% had a nonpathogen alone, and 3% had Giardia lamblia. Protozoan infection was highly associated with the practice of anilingus (p<0.05). Infection with E. histolytica correlated significantly with the presence of nonpathogenic protozoa (p<0.005). The following screening strategy was judged to be the most cost-effective: examine one sample first; if E. histolytica is found or if the sample is negative, no further investigation is required; if a nonpathogen is found, one additional sample should be obtained. This strategy had a sensitivity for E. histolytica of 85% and a cost of $136 per case detected.

Original languageEnglish (US)
Pages (from-to)150-154
Number of pages5
JournalJournal of general internal medicine
Issue number3
StatePublished - May 1986
Externally publishedYes


  • homosexual men
  • parasitic infections
  • screening

ASJC Scopus subject areas

  • Internal Medicine


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