STI or STD? What’s the Difference?

Diseases that are spread through sexual contact are usually referred to as sexually transmitted diseases or STDs for short. In recent years, however, many experts in this area of public health have suggested replacing STD with a new term—sexually transmitted infection, or STI.

Why the change? The concept of “disease,” as in STD, suggests a clear medical problem, usually some obvious signs or symptoms. But several of the most common STDs have no signs or symptoms in the majority of persons infected. Or they have mild signs and symptoms that can be easily overlooked. So the sexually transmitted virus or bacteria can be described as creating “infection,” which may or may not result in “disease.” This is true of chlamydia, gonorrhea, herpes, and human papillomavirus (HPV), to name a few.

According to the American Sexual Health Association, we should begin to see an increased use of the term STI.