T among participants living in Peru (46.0 ), Brazil (37.8 ), and Ecuador (37.3 ), with lower prevalence among participants living in Thailand (6.4 ), South Africa (17.6 ), and the United States (27.1 ; P,0.001). Randomization group was not associated with HSV-2 prevalence at baseline (P = 0.44). In multivariable analysis, all factors remained significantly associated with HSV-2 prevalence with the
Lcer was identified, and 5.6 had 1 STI examination during which a groin ulcer was identified after HIV seroconversion, and thus after stopping study drug. The proportions with each type of ulcer did not differ between participants in the FTC/TDF arm and participants in the placebo arm. Finally, the iPrEx protocol did not use the HSV-2 test manufacturer's suggested cutoffs for indeterminate (IR
Aseline by age group at enrollment, while Figure 1b shows HSV-2 incidence during follow-up by age group at enrollment. HSV-2, herpes simplex virus type 2. doi:10.1371/journal.pone.0091513.gDiscussionIn this analysis of participants in the iPrEx trial of daily oral FTC/TDF PrEP, we found no association between FTC/TDF and incidence of HSV-2 infection, even after accounting for actual use of FTC/TDF
D if the HSV-2 diagnosis occurred at or after HIV seroconversion, and ulcers were excluded if they occurred at or after HIV seroconversion. We estimated the proportion of participants with 1 ulcer AE classified as Gradeor above (i.e., moderate, severe, or potentially life-threatening), 1 STI examination during which a perianal ulcer was detected, and 1 STI examination during which a groin ulcer
No differences by randomization group in the proportion of participants with 1 STI examination during which a perianal ulcer (FTC/TDF 3.5 vs. placebo 4.7 , P = 0.37) or groin ulcer (FTC/TDF 2.5 vs. placebo 1.9 , P = 0.51) was identified; results were similar after excluding participants with a positive syphilis rapid plasma reagin test at the same visit. However, symptoms that prompted STI exam
T among participants living in Peru (46.0 ), Brazil (37.8 ), and Ecuador (37.3 ), with lower prevalence among participants living in Thailand (6.4 ), South Africa (17.6 ), and the United States (27.1 ; P,0.001). Randomization group was not associated with HSV-2 prevalence at baseline (P = 0.44). In multivariable analysis, all factors remained significantly associated with HSV-2 prevalence with the
D ,25 years (7.1 per 100 person-years) and the lowest rate among participants aged 40 years (1.6 per 100 person-years; P trend = 0.001). Country of residence was also associated with HSV-2 incidence, with theDaily Oral FTC/TDF PrEP and HSV-2 among MSMthere were 72 ulcer AEs classified as Grade 2 or above, with 43 participants (4.3 ) having 1 ulcer AE. Among the 72 ulcer AEs, 23 (31.9 ) were conf
D ,25 years (7.1 per 100 person-years) and the lowest rate among participants aged 40 years (1.6 per 100 person-years; P trend = 0.001). Country of residence was also associated with HSV-2 incidence, with theDaily Oral FTC/TDF PrEP and HSV-2 among MSMthere were 72 ulcer AEs classified as Grade 2 or above, with 43 participants (4.3 ) having 1 ulcer AE. Among the 72 ulcer AEs, 23 (31.9 ) were conf