While hpv can also be transmitted via non-penetrative sexual activity, it is less transmissible than via penetrative sex. There is conflicting evidence about the effect of condomson transmission of low-risk hpv. Some studies have suggested that they are effective at reducing transmission. Other studies suggest that condoms are not effective at preventing transmission of the low-risk hpv variants that cause genital warts. Anal dysplasia can be found in anal warts or sometimes these changes are found incidentally at the time of unrelated anal surgery (i. Screening procedures available to detect anal dysplasia include anal cytology and high-resolution anoscopy (hra). You have diabetes or a weakened immune system (for example, from hiv) and have developed warts. Genital warts is a common sexually transmitted infection (sti) passed on through vaginal, anal and, rarely, oral sex.