Giardiasis: Association with Homosexuality

Abstract
Giardiasis is a common gastrointestinal illness among travelers. Recently, an increased prevalence of giardiasis in men who had not traveled outside New York City [USA] was seen at The New York Hospital and was due to transmission of this disease among homosexuals. Cases of giardiasis for a 5 yr period were then reviewed, and it was discovered that 19 male patients who had not traveled or had an immunodeficiency disease were homosexuals. This accounted for 22% of the adult men with giardiasis during that period. Adult women with giardiasis usually were either travelers or had an immunodeficiency disease (96%). It is important to obtain a sexual history in these patients and treat sexual contacts to prevent recurrent infection. These findings are consistent with venereal transmission of giardiasis.

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