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Cancer Causes Control. 2015 Oct;26(10):1461-6. doi: 10.1007/s10552-015-0642-0. Epub 2015 Jul 30.

Persistence of Trichomonas vaginalis serostatus in men over time.

Author information

1
Division of Public Health Sciences and the Alvin J. Siteman Cancer Center, Department of Surgery, Washington University School of Medicine, 660 S. Euclid Ave., Box 8100, Rm. 208S, St. Louis, MO, 63110, USA. sutcliffes@wudosis.wustl.edu.
2
School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, USA.
3
Division of Infectious Diseases, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, USA.
4
Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA.

Abstract

PURPOSE:

Previous epidemiologic studies have observed positive associations between Trichomonas vaginalis (Tv) serostatus and both prostate cancer (PCa) risk and mortality. However, only a few small older studies have examined Tv antibody persistence over time, all of which were composed mainly of female patients. Therefore, we examined Tv antibody persistence over time, as well as intra-individual variability, among middle- to older-aged men in the Southern Community Cohort Study (SCCS).

METHODS:

We tested baseline and repeat plasma specimens (collected 1-3 years later) from 248 male participants for Tv antibodies. We used the same enzyme-linked immunosorbent assay as in previous studies of Tv serostatus and PCa.

RESULTS:

At baseline, 46 (18.5 %) participants were seropositive for Tv infection. Seventy-six percent of these men were still seropositive 1-3 years later. A similar proportion of men "seroconverted" (4.0 %) as "seroreverted" (4.4 %), all of whom had absorbance values near the cutoff point for seropositivity. Overall, substantial agreement was observed between baseline and repeat serostatus (κ = 0.72, 95 % confidence interval 0.60-0.83).

CONCLUSION:

Tv seropositivity was largely persistent between plasma specimens collected 1-3 years apart from middle- to older-aged men. These high levels of persistence are similar to those observed for other sexually transmitted infections frequently investigated in relation to PCa.

KEYWORDS:

Antibody; Males; Persistence; Reproducibility; Trichomonas vaginalis

PMID:
26223890
PMCID:
PMC4567958
DOI:
10.1007/s10552-015-0642-0
[Indexed for MEDLINE]
Free PMC Article

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