Sexually transmitted diseases (STDs), or sexually transmitted infections (STIs), are generally acquired by Sexual Contact. The organisms that cause sexually transmitted diseases may pass from person to person in blood, semen or vaginal and other bodily fluids.
It’s possible to contract sexually transmitted diseases from people who seem perfectly healthy — people who, in fact, aren’t even aware of being infected. Many STDs cause no symptoms in some people, and therefore if someone falls in the high risk category, should be tested for the presence of such infections
If your sexual history and current signs and symptoms suggest that you have an STI, laboratory tests can identify the cause and also detect other co-existing infections you might also have contracted.