More than 30 different bacteria, viruses and parasites are known to be transmitted through sexual contact. Eight of these pathogens are linked to the greatest incidence of sexually transmitted disease. Of these 8 infections, 4 are currently curable: syphilis, gonorrhoea, chlamydia and trichomoniasis.
There are dozens of STDs. Some STDs, such as syphilis, gonorrhea, and chlamydia, are spread mainly by sexual contact. Skip directly to site content Skip directly to page options Skip directly to A-Z link.
Currently, HIV infection is the seventh leading cause of death in this age group. Though fatalities are rare among other STIs, they can lead to infertility and ectopic pregnancies—the latter of which is life threatening. In addition, other STIs such as —including chlamydia, gonorrhea, herpes and syphilis—also make those who are infected with these conditions more vulnerable to HIV infection.
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. Sometimes these infections can be transmitted nonsexually, such as from mother to infant during pregnancy or childbirth, or through blood transfusions or shared needles. STDs don't always cause symptoms.
Sexually transmitted infections STIsalso referred to as sexually transmitted diseases STDsare infections that are commonly spread by sexual activityespecially vaginal intercourseanal sex and oral sex. More than 30 different bacteriavirusesand parasites can be transmitted through sexual activity. The most effective way of preventing STIs is by not having sex.
If you have sex — oral, anal or vaginal intercourse and genital touching — you can get an STD, also called a sexually transmitted infection STI. Thinking or hoping your partner doesn't have an STI is no protection — you need to know for sure. And although condoms, when properly used, are highly effective for reducing transmission of some STDs, no method is foolproof.
They may also be called STDs for sexually transmitted disease. Millions of new cases are diagnosed every year in the U. These include:. Use a male latex condom the correct way every time you have sex.
The term sexually transmitted disease STD is used to refer to a condition passed from one person to another through sexual contact. Depending on the specific STD, infections may also be transmitted through sharing needles and breastfeeding. But some STDs cause obvious symptoms.