Journal of Antimicrobial Chemotherapy (2000) 45, 1-8
© 2000 The British Society for Antimicrobial Chemotherapy
Herpes simplex virus: the importance of asymptomatic shedding
a Departments of Medicine, b Laboratory Medicine and c Epidemiology, University of Washington, Seattle, WA 98195; d Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
Herpes simplex virus (HSV) is frequently shed after infection of the genital or perianal area. HSV shedding, as determined by culture, occurs on about 3% of days for immunocompetent women and men, and more for persons with HIV infection or if measured by polymerase chain reaction (PCR). Most horizontal and vertical transmission of HSV occurs during unrecognized or asymptomatic shedding, and the majority of HSV-2-infected persons are unaware of their infection. Many persons with asymptomatic HSV-2 infection can learn to recognize genital signs and symptoms as recurrences of HSV-2 infection. However, some shedding episodes remain truly asymptomatic even after patient education. Antiviral therapy dramatically reduces asymptomatic shedding, and trials to evaluate its effect on HSV transmission are underway.
* Correspondence address. Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA. Tel: + 1-206-341-5207; Fax: + 1-341-5203-4411; E-mail: viralimm{at}uwashington.edu
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