Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Sexually transmitted infection
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Sexually transmitted infection: An infection that can be transferred from one person to another through sexual contact. In this context, sexual contact is more than just sexual intercourse (vaginal and anal) and also includes kissing, and the use of sexual "toys," such as vibrators.
Examples of some of the sexually transmitted infections (STIs) are:
- AIDS/HIV,
- Chlamydia,
- genital herpes,
- genital warts,
- gonorrhea,
- hepatitis B, and
- syphilis.
The term "sexually transmitted infection (STI)" corresponds to and is meant to replace the older term "sexually transmitted disease (STD).
See also: Sexually Transmitted Infections (STIs) in Women; Sexually Transmitted Infections (STIs) in Men.
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