Sexually Transmitted Disease - Cause - Transmission Probabilities

Transmission Probabilities

The risks and transmission probabilities of sexually transmitted diseases are summarized by act in the table below.

Odds of transmission per unprotected sexual act with an infected person
	Known risks	Possible or unknown risks
Performing oral sex on a man	Throat chlamydia Throat gonorrhea (25–30%) Herpes (rare) HPV Syphilis (1%) With anal to oral practices: Hepatitis A Shigella	Hepatitis B (low risk) HIV (very low risk; 0.01%) Hepatitis C (unknown)
Performing oral sex on a woman	Herpes	Throat gonorrhea Throat chlamydia HPV
Receiving oral sex—man	Chlamydia Gonorrhea Non-gonococcal urethritis Herpes Syphilis (1%)	HPV
Receiving oral sex—woman	Herpes	HPV Vaginal thrush Bacterial Vaginosis Gonorrhea
Vaginal sex—man	Chlamydia (30–50%) Crabs Scabies Gonorrhea (22%) Hepatitis B Herpes (0.07% for HSV-2) HIV (0.05%) HPV (high: around 40-50%) Non-gonococcal urethritis Syphilis Trichomoniasis	Hepatitis C
Vaginal sex—woman	Chlamydia (30–50%) Crabs Scabies Gonorrhea (47%) Hepatitis B (50–70%) Herpes HIV (0.1%) HPV (high; around 40-50%) Syphilis Trichomoniasis	Hepatitis C
Anal sex—insertive	Chlamydia Crabs Scabies (40%) Gonorrhea Hepatitis B Herpes HIV (0.62%) HPV Non-gonococcal urethritis Syphilis (14%)	Hepatitis C
Anal sex—receptive	Chlamydia Crabs Scabies Gonorrhea Hepatitis B Herpes HIV (1.7%) HPV Syphilis (1.4%)	Hepatitis C
Anilingus	Amebiasis Cryptosporidiosis (1%) Giardiasis Hepatitis A (1%) Shigellosis (1%)	HPV (1%)