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A sexually transmitted disease (STD) is a disease transmitted through sexual contact between two people. They may be transmitted through the exchange of semen, blood, and other body fluids or by direct body contact. The term sexually transmitted disease applies to more than twenty different infections. At one time, these diseases were more commonly referred to as venereal diseases.

Sexually transmitted diseases are often mild infections that can be cleared up with simple medical treatment. If left untreated, however, serious complications can result. These complications include:

  • Birth defects
  • Blindness
  • Bone deformities
  • Cancer
  • Heart disease
  • Infertility
  • Mental retardation
  • Death

The majority of these complications develop only when an STD is not treated properly.


Click here to download the May 2013 update on the Houston syphilis outbreak response

Syphilis - learn more

Gonorrhea - learn more

Chlamydia - learn more

Scabies and Crabs - learn more

Herpes - learn more

HPV (Warts) - learn more

HIV/AIDS - learn more

Shigella - learn more


Epidemiology of Sexually Transmitted Diseases



STD Testing Locations

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