Diseases due to or propagated by sexual contact.

(sexually transmitted disorder) A disorder acquired through sexual contact.

Sexually transmitted diseases (STDs), or sexually transmitted infections (STIs), are infections that are passed from one person to another through sexual contact. The contact is usually vaginal, oral, and anal sex. But sometimes they can spread through other intimate physical contact. This is because some STDs, like herpes and HPV, are spread by skin-to-skin contact. There are more than 20 types of STDs, including Chlamydia; Genital herpes; Gonorrhea; HIV/AIDS; HPV; Pubic lice; Syphilis; Trichomoniasis. STDs can be caused by bacteria, viruses, and parasites. Most STDs affect both men and women, but in many cases the health problems they cause can be more severe for women. If a pregnant woman has an STD, it can cause serious health problems for the baby. STDs don't always cause symptoms or may only cause mild symptoms. So it is possible to have an infection and not know it. But you can still pass it on to others.

(sexually transmitted infection) A disease acquired predominantly through sexual contact.

(sexually transmitted infection) An infection that is acquired through sexual contact.

Sexually transmitted diseases (STDs), also termed sexually transmitted infections (STIs), can be caused by a number of microorganisms that vary widely in size, life cycle, the diseases and symptoms caused, and susceptibility to available treatments.

Sexually transmitted diseases (STDs) - or sexually transmitted infections (STIs) - are generally acquired by sexual contact. The organisms (bacteria, viruses or parasites) that cause sexually transmitted diseases may pass from person to person in blood, semen, or vaginal and other bodily fluids.

Sexually transmitted disease (STD), any disease (such as syphilis, gonorrhea, AIDS, or a genital form of herpes simplex) that is usually or often transmitted from person to person by direct sexual contact. It may also be transmitted from a mother to her child before or at birth or, less frequently...