A sexually transmitted disease (STD) develops because of an STI and the term implies that the infection has led to some symptom of disease. People sometimes use the terms in one another’s place.

Sexually transmitted diseases (STDs) are caused by sexually transmitted infections (STIs). They are spread mainly by sexual contact. STIs are caused by bacteria, viruses or parasites. A sexually …

Apr 30, 2026 · All STDs are caused by an STI. STIs are usually transmitted through genital fluids or skin-to-skin contact during anal, oral, or vaginal sex. Many infections do not become diseases, …

Most STIs are treatable and curable, such as syphilis, gonorrhea, chlamydia, and trichomoniasis are curable. Others, such as HIV/AIDS and genital herpes, are not curable. [1] . Some vaccinations have …

Many STDs can be easily diagnosed and treated. It is common that many people will not have any symptoms when they are infected with an STD. This makes screening for STDs important to prevent …

Mar 27, 2026 · Chlamydia is the most commonly reported STD in the U.S. It's spread mostly by vaginal or anal sex, but you can get it through oral sex, too. Sometimes you'll notice an odd discharge from …

At the Chicago Department of Public Health, your sexual health matters. Our Sexual Health Specialty Clinics offer a safe, welcoming, and confidential environment where patients can receive high-quality …

Feb 3, 2023 · Sexually transmitted infections (STI) are infections or conditions that you can get from any kind of sexual activity involving your mouth, anus, vagina or penis. Another common name for STIs is …

Jul 15, 2025 · Sexually transmitted infections (STIs) are infections that are passed from one person to another through sexual contact. If not treated, a STI can develop into a sexually transmitted disease …

The best way to prevent getting an STD is to not have any type of sexual activity, including oral, vaginal, and anal sex. But you can take several steps to lower your risk for an STD if you decide to become …