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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. Sexually transmitted infections (STIs) - World Health Organization

    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 …

  3. Sexually transmitted diseases (STDs) - Symptoms and causes

    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 …

  4. 11 Common Sexually Transmitted Infections (STIs) - Verywell …

    Apr 16, 2025 · The most common sexually transmitted infections (STIs) in the United States are chlamydia, trichomoniasis, human papillomavirus (HPV), genital herpes, mycoplasma …

  5. Sexually Transmitted Infections - Cleveland Clinic

    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 …

  6. Sexually Transmitted Infections - StatPearls - NCBI Bookshelf

    Apr 20, 2024 · Sexually transmitted infections (STIs), previously known as sexually transmitted diseases, involve the transmission of an organism between sexual partners through different …

  7. Sexually Transmitted Infections | STIs | Venereal Disease

    Jun 26, 2024 · Sexually transmitted infections (STIs), or sexually transmitted diseases (STDs), are infections that are passed from one person to another through sexual contact. They are …

  8. Sexually Transmitted Diseases: Types, Symptoms, Treatment - Healthline

    Apr 11, 2023 · Sexually transmitted infections can lead to sexually transmitted diseases. Treatment can depend on your diagnosis.

  9. Overview of Sexually Transmitted Infections - MSD Manuals

    Sexually transmitted infection (STI) refers to infection with a pathogen that is transmitted through blood, semen, vaginal fluids, or other body fluids during oral, anal, or genital sex with an …

  10. Sexually transmitted infections (STIs) - NHS

    Find out more about sexually transmitted infections (STIs), including possible symptoms, common types of STI and when to go to a sexual health clinic.

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