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  • Long-Term Persistence of Pr...
    Castle, Philip E.; Rodríguez, Ana Cecilia; Burk, Robert D.; Herrero, Rolando; Wacholder, Sholom; Hildesheim, Allan; Morales, Jorge; Rydzak, Greg; Schiffman, Mark

    The Journal of infectious diseases, 03/2011, Volume: 203, Issue: 6
    Journal Article

    Background. Detailed descriptions of long-term persistence of human papillomavirus (HPV) in the absence of cervical precancer are lacking. Methods. In a large, population-based natural study conducted in Guanacaste, Costa Rica, we studied a subset of 810 initially HPV-positive women with ≥3 years of active follow-up with ≥3 screening visits who had no future evidence of cervical precancer. Cervical specimens were tested for >40 HPV genotypes using a MY09/11 LI-targeted polymerase chain reaction method. Results. Seventy-two prevalently-detected HPV infections (5%) in 58 women (7%) persisted until the end of the follow-up period (median duration of follow-up, 7 years) without evidence of cervical precancer. At enrollment, women with long-term persistence were more likely to have multiple prevalently-detected HPV infections (P<.001 ) than were women who cleared their baseline HPV infections during follow-up. In a logistic regression model, women with long-term persistence were more likely than women who cleared infections to have another newlydetected HPV infection detectable at ≥3 visits (odds ratio, 2.6; 95% confidence interval, 1.2-5.6). Conclusions. Women with long-term persistence of HPV infection appear to be generally more susceptible to other HPV infections, especially longer-lasting infections, than are women who cleared their HPV infections.