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- Title
Prevention of ultraviolet-light-induced herpes labialis by sunscreen.
- Authors
Rooney, J F; Bryson, Y; Mannix, M L; Dillon, M; Wohlenberg, C R; Banks, S; Wallington, C J; Notkins, A L; Straus, S E
- Abstract
Sunlight exposure is reported by some patients to precede onset of recurrent herpes labialis. Ultraviolet (UV) B light is known to be a stimulus for the reactivation of herpes simplex virus (HSV) infections. We assessed the effect of a sunblocking agent on UV-light-induced reactivation of recurrent herpes labialis in a double-blind, placebo-controlled crossover trial. 38 patients were exposed on two separate occasions to four minimum erythema doses of UV light at an area of previous labial herpes recurrence. A solution containing sunscreen was applied to the lips before one exposure and a matched placebo before the other. After placebo and UV exposure, herpes labialis developed in 27 (71%) of the 38 patients, with a mean time to recurrence of 2.9 (SEM 0.2) days. In contrast, when sunscreen was applied before UV exposure, no lesions developed, but 1 of the 35 patients shed virus at the exposure site. We conclude that UV light is a potent stimulus for inducing reactivation of herpes labialis, and that application of sunscreen may be effective in the prevention of sunlight-induced recurrent infection.
- Publication
Lancet (London, England), 1991, Vol 338, Issue 8780, p1419
- ISSN
0140-6736
- Publication type
Journal Article
- DOI
10.1016/0140-6736(91)92723-f