Oral to oral transmission

Although the greater efficiency of male-to-female versus female-to-male transmission has also been observed in developing countries, a systematic review of the literature found a greatly enhanced efficiency of female-to-male transmission in the high-prevalence epidemics of Asia and sub-Saharan Africa. The ratio of male-to-female summary mean transmission rates in the developing world compared to the rate in Western countries was , whereas for female-to-male transmission this ratio was 341. Women in some developing countries may be more infectious due to higher prevalence of sexually transmitted infections (STIs) and untreated HIV disease, although the authors state that evidence for the relative importance of these factors is unclear. The greater susceptibility of men in developing countries is also difficult explain, and may include a low prevalence of male circumcision, poor genital hygiene, a high prevalence of genital ulcer disease, and a high prevalence of unprotected sex with women having a high probability of being HIV infected.( 65 )

Oral to oral transmission

oral to oral transmission

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