Dr. Mona Khanna: A Sexually Transmitted Infection or STI refers to the conditions a person can get through sexual contact with an infected person. Sexual contact includes vaginal intercourse, anal intercourse or oral sex. STIs are also sometimes referred to as Sexually Transmitted Diseases, STDs or Venereal diseases. Now some common STIs include chlamydia, gonorrhea and herpes, but genital crabs and warts can be passed on as well. Learn more about sexually transmitted infections here or share your story or experience with icyou.