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Minimal change in HSV-2 seroreactivity: A cross-sectional Swedish population study

The prevalence of antibodies to herpes simplex virus type 2 (HSV-2) was determined in sera collected from 2 Swedish cross-sectional populations during 1990/91 and 1996/97. A glycoprotein G2 (gG-2) peptide ELISA was used to analyse 2899 sera from adults. We found a prevalence of 13.0% in 18–70-y-olds in 1990/91 and 16.4% in 31–55-y-olds in 1996/97. Seropositivity to HSV-2 was somewhat higher in women than in men; 14.4% compared to 11.6% in 1990/91 and 18.9% compared to 13.6% in 1996/97. Overall there was a significant difference in female prevalence of HSV-2 compared to prevalence in males of the same age groups (p=0.013). Total antibody prevalence to HSV-1 of 88% in HSV-2 negative individuals above 18 y of age was found. HSV-2 positive individuals were found seropositive to HSV-1 in approximately 95% of the cases. 12% were negative for both HSV-1 and HSV-2 antibodies. In addition, there was no serological sign that the reported increase of HSV-1 as an early sexual disease had reduced the frequency of HSV-2 seropositivity in the sexually most active age groups. In conclusion, our investigation has shown no significant increase of HSV-2 seroprevalence in randomly selected Swedish subjects during the defined time period.