skip to content

HIV/AIDS Glossary

Sexually Transmitted Infection (STI)

Synonym(s): Sexually Transmitted Disease

An infectious disease that spreads from person to person during sexual contact. Sexually transmitted infections, such as syphilis, HIV infection, and gonorrhea, are caused by bacteria, parasites, and viruses.

Search the Glossary

What's this?


AIDSinfo Glossary App

Download Glossary