Sexually transmitted diseases (STDs)
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Diagnosis If your sexual history and current signs and symptoms suggest that you have an STI, laboratory tests can identify the cause and detect coinfections you might have contracted. Blood tests. Blood tests can confirm the diagnosis of HIV or later stages of syphilis. Urine samples. Some STIs can be confirmed with a urine sample. Fluid samples. If you have active genital sores, testing fluid and samples from the sores may be done to diagnose the type of infection. Laboratory tests of material from a genital sore or discharge are used to diagnose some STIs. Screening Testing for a disease in someone who doesn't have symptoms is called screening. Most of the time, STI screening is not a routine part of health care, but there are exceptions: Everyone. The one STI screening test suggested for everyone ages 13 to 64 is a blood or saliva test for human immunodeficiency virus (HIV), the virus that causes AIDS. Everyone born between 1945 and 1965. There's a high incidence of he