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KAIS 2007 1 - Kenya National AIDS & STI Control Programme ...

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DATA IN CONTEXTHSV-2 AND HIV IN THE LITERATUREMultiple studies from sub-Saharan Africa indicate that HSV-2 infection can increase aperson’s risk of acquiring and transmitting HIV:• HSV-2 is the most common cause of genital ulcer disease.• In 40-60% of new HIV cases in sub-Saharan Africa, HSV-2 is a contributingfactor. 1• Among HIV-uninfected heterosexual women and men, HSV-2 is associated withan estimated three-fold increased risk of acquiring HIV. 2• Among HIV-infected women and men, HSV-2 is associated with an estimatedfive-fold increased risk of transmitting HIV per sexual contact and has also beenlinked to more rapid HIV/<strong>AIDS</strong> disease progression. 3,4• Suppressing HSV-2 with antiviral drugs among HIV-infected persons reducesHIV viral load in the blood and genital secretions. 5,6• HSV-2 suppression is thought to reduce sexual transmission of HSV-2 by up to50%. 7 To date, however, there is no evidence for reduced HIV acquisition at thepopulation level by suppressing HSV-2. 8,918 19 20 21 22 23 24 25 26Figure 12.3b HSV-2 prevalence among women and men aged 15-64 yearsby marital status, <strong>Kenya</strong> <strong>2007</strong>.18Freeman EE, Weiss HA, Glynn JR, et al. Herpes simplex virus 2 infection increases HIV acquisition in men andwomen: Systematic review and meta‐analysis of longitudinal studies. <strong>AIDS</strong> 2006; 20:73‐83.19Freeman EE, Orroth KK, White RG, et al. Proportion of new HIV infections attributable to herpes simplex 2 increasesover time: simulations of the changing role of sexually transmitted infections in sub‐Saharan African HIV epidemics.Sex Transm Infect <strong>2007</strong>; 83 (suppl 1):i17‐24.20Gray RH, Wawer MJ, Brookmeyer R, et al. Probability of HIV‐1 transmission per coital act in monogamous,heterosexual, HIV‐1‐discordant couples in Rakai, Uganda. Lancet 2001; 357:1149‐1153.21Corey L. Synergistic copathogens: HIV‐1 and HSV‐2. N Engl J Med <strong>2007</strong>; 356:854‐856.22Baeten JM, Strick LB, Lucchetti A, et al. Herpes simplex virus suppressive treatment decreases plasma HIV‐1 viralload in HSV‐2/HIV‐1 co‐infected women: a randomized, placebo‐controlled, crossover trial. J Infect Dis 2008; 198:1804‐1808.23Nagot N, Ouedraogo A, Foulongne V, et al. Reduction of HIV‐1 RNA levels with therapy to suppress herpes simplexvirus. N Engl J Med <strong>2007</strong>; 356:790–799.24Corey L, Ashley R, Valaciclovir HSV Transmission Study Group. Prevention of herpes simplex virus type 2transmission with antiviral therapy. Herpes 2004; 11(suppl 3):170a‐174a.25Celum C, Wald A, Hughes J, et al. 2008.26Watson‐Jones D, Weiss HA, Ruizoka M, et al. Effect of herpes simplex suppression on incidence of HIV amongwomen in Tanzania. N Engl J Med 2008; 358:1560‐1571.<strong>KAIS</strong> <strong>2007</strong> 216

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