How does the prevalence of trichomoniasis vary among age groups?

Updated: Jan 02, 2020
  • Author: Darvin Scott Smith, MD, MSc, DTM&H; Chief Editor: Michael Stuart Bronze, MD  more...
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The National Longitudinal Study of Adolescent Health Study found a prevalence of 2.3% among adolescents aged 18-24 years and 4% among adults 25 years and older. [37] A prevalence of 3.1% in females aged 14-49 years was observed based on a nationally representative sample of women in the National Health and Nutrition Examination Survey (NHANES) 2001-2004 study. [38] Despite this trend, trichomoniasis is still a concern in younger women. In female adolescents, trichomoniasis is more common than gonorrhea; particularly disconcerting given that it increases susceptibility to other infections. [39]

In a study of men attending an STI clinic in Denver, the prevalence of Trichomonas infection was 0.8% in men younger than 30 years and 5.1% in men 30 years and older. [40] This increase in prevalence is believed to result from age-related enlargement of the prostate gland.

Vertical transmission of T vaginalis during birth is possible and may persist up to 1 year, causing UTI, and, less commonly, respiratory infection. [10] Between 2% and 17% of female offspring of infected women acquire infection. [41]

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