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Original Article
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Volume 342:844-850 March 23, 2000 Number 12
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Reactivation of Genital Herpes Simplex Virus Type 2 Infection in Asymptomatic Seropositive Persons
Anna Wald, M.D., M.P.H., Judith Zeh, Ph.D., Stacy Selke, M.S., Terri Warren, M.S., Alexander J. Ryncarz, Ph.D., Rhoda Ashley, Ph.D., John N. Krieger, M.D., and Lawrence Corey, M.D.

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ABSTRACT

Background Most persons who have serologic evidence of infection with herpes simplex virus (HSV) type 2 (HSV-2) are asymptomatic. Historically, it has been assumed that these persons have less frequent viral reactivation than those with symptomatic infection.

Methods We conducted a prospective study to investigate genital shedding of HSV among 53 subjects who had antibodies to HSV-2 but who reported having no history of genital herpes, and we compared their patterns of viral shedding with those in a similar cohort of 90 subjects with symptomatic HSV-2 infection. Genital secretions of the subjects in both groups were sampled daily and cultured for HSV for a median of 94 days.

Results HSV was isolated from the genital mucosa in 38 of the 53 HSV-2–seropositive subjects (72 percent) who reported no history of genital herpes, and HSV DNA was detected by the polymerase-chain-reaction assay in cultures prepared from genital mucosal swabs in 6 additional subjects. The rate of subclinical shedding of HSV in the subjects with no reported history of genital herpes was similar to that in the subjects with such a history (3.0 percent vs. 2.7 percent). Of the 53 subjects who had no reported history of genital herpes, 33 (62 percent) subsequently reported having typical herpetic lesions; the duration of their recurrences in these subjects was shorter (median, three days vs. five days; P<0.001) and the frequency lower (median, 3.0 per year vs. 8.2 per year; P<0.001) than in the 90 subjects with previously diagnosed symptomatic infection. Only 1 of these 53 subjects had no clinical or virologic evidence of HSV infection.

Conclusions Seropositivity for HSV-2 is associated with viral shedding in the genital tract, even in subjects with no reported history of genital herpes.


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From the Departments of Medicine (A.W., L.C.), Epidemiology (A.W.), Statistics (J.Z.), Laboratory Medicine (S.S., A.J.R., R.A., L.C.), and Urology (J.N.K.), University of Washington, Seattle; Westover Heights Clinic, Portland, Oreg. (T.W.); and the Program in Infectious Diseases, Fred Hutchinson Cancer Research Center, Seattle (L.C.). Presented in part at the 36th Interscience Conference on Antimicrobial Agents and Chemotherapy, New Orleans, September 15–18, 1996.

Address reprint requests to Dr. Wald at the University of Washington Virology Research Clinic, 1001 Broadway, Suite 320, Seattle, WA 98122, or at annawald{at}u.washington.edu.

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