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  1. About Sexually Transmitted Infections (STIs) | STI | CDC

    Mar 25, 2024 · A sexually transmitted infection (STI) is a virus, bacteria, fungus, or parasite people can get through sexual contact. A sexually transmitted disease (STD) develops …

  2. 11 Common Sexually Transmitted Infections (STIs)

    Apr 16, 2025 · Worldwide, there are over 20 sexually transmitted infections (STIs) caused by bacteria, viruses, and parasites. Several like gonorrhea, chlamydia, genital herpes, HPV, and …

  3. Sexually transmitted disease (STD) symptoms - Mayo Clinic

    Mar 12, 2024 · Learn about common and possible STD symptoms and how serious they might be. Sexually transmitted diseases are infections spread mainly by contact with genitals or bodily …

  4. Sexually transmitted infection - Wikipedia

    A sexually transmitted infection (STI), also referred to as a sexually transmitted disease (STD) and the older term venereal disease (VD), is an infection that is spread by sexual activity, …

  5. Sexually transmitted infections (STIs)

    May 29, 2025 · WHO fact sheet on sexually transmitted diseases (STIs), providing key facts, as a public health issue, infections and transmissions, STIs and women's health, adverse outcomes …

  6. Sexually Transmitted Infections (Sexually Transmitted Diseases)

    A sexually transmitted infection (sexually transmitted disease) is a serious condition that can develop after you have sex. Common STI symptoms include itching and burning around your …

  7. Sexually Transmitted Infections | STIs - MedlinePlus

    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 …

  8. About STIs: Prevention, Testing, and Treatment | GovFacts

    The terms STI and STD often get used interchangeably, but health experts increasingly prefer “sexually transmitted infection” over “sexually transmitted disease.” An STI is an infection …

  9. Sexually Transmitted Diseases (STDs): Causes, Tests, & Treatment - WebMD

    Oct 14, 2024 · STDs are sexually transmitted diseases. This means they are most often, but not exclusively, spread by sexual contact. STDs used to be called venereal diseases (VD). …

  10. Sexually Transmitted Infection Symptoms You Should Know

    Feb 3, 2022 · STI symptoms can range from mild to severe — and they can affect different parts of the body. After an initial infection, it can take days, weeks, months, or even years for …