WebMD
Font Size
A
A
A

Sexually Transmitted Infections (STIs)

Sexually transmitted infections (STIs)—also referred to as sexually transmitted diseases (STDs)—are those spread by sexual contact. They may also be spread from a pregnant woman to her fetus before or during delivery.

Exposure to an STI can occur anytime a person has sex or close contact that involves the genitals, the mouth, or the rectum with another person, but exposure is more likely if a person has many sex partners or does not use condoms. STIs can be prevented by not having sexual contact (abstinence).

STIs include:

Most STIs can be treated and cured, but some cannot. Some STIs, such as HIV and syphilis, can cause death.

By Healthwise Staff
Primary Medical Reviewer William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical Reviewer H. Michael O'Connor, MD - Emergency Medicine
Last Revised November 16, 2012

WebMD Medical Reference from Healthwise

Last Updated: November 16, 2012
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.