1. Oral sex has also been examined as a risk factor in non-specific urethritis and pelvic inflammatory disease, where no specific causative agent has been identified. In pelvic inflammatory disease patients had sex more often than controls (p<0.001) and more frequently reported oral sex (p<0.05), but did not have significantly more sexual partners or a younger age at first intercourse.105 A strong association (odds ratio 11.4) was also found between insertive oral sex and the development of Chlamydia negative Ureaplasma negative nongonococcal urethritis.106
2. Factors associated with trichomoniasis, candidiasis and bacterial vaginosis;Hart, G.;Int J STD AIDS,1993
3. Recurrent vaginitis and oral sex (letter);White, W.; Spencer-Phillips, P.J.;Lancet,1979
4. Recurrent vaginitis and oral sex (letter);Oates, J.K.;Lancet,1979
5. Oral and esophageal candidiasis;RoseV, S.A.; Sugar, A.M.,1993