STD Screening and Treatment


If your sexual history and current signs and symptoms suggest that you have an STD, laboratory tests can identify the cause and detect coinfections you might have contracted. Blood tests are used to typically confirm the diagnosis of HIV or later stages of syphilis. Other STD’s can be confirmed with a urine sample. 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 can further be used to diagnose other STD’s.


Testing for a disease in someone who doesn’t have obvious symptoms is called screening. Most of the time, STD screening is not a routine part of health care, but there are exceptions for screening and populations that should be included in the practice:

  • Everyone – The one STD 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 hepatitis C in people born between 1945 and 1965. Since the disease often causes no symptoms until it’s advanced, experts recommend that everyone in that age group be screened for hepatitis C.
  • Pregnant Women – Screening for HIV, hepatitis B, chlamydia, and syphilis generally takes place at the first prenatal visit for all pregnant women. Gonorrhea and hepatitis C screening tests are recommended at least once during pregnancy for women at high risk of these infections.
  • Women Age 21 and Older – The pap test screens for cervical abnormalities, including inflammation, precancerous changes and cancer, which is often caused by certain strains of human papillomavirus (HPV). Experts recommend that starting at age 21, women should have a pap test at least every three years. After age 30, women are advised to have an HPV DNA test and a pap test every five years or a pap test every three years.
  • Women under Age 25 who are Sexually Active – All sexually active women under age 25 should be tested for chlamydia infection. The chlamydia test uses a sample of urine or vaginal fluid you can collect yourself. Most experts recommend repeating the chlamydia test three months after you’ve had a positive test and have been treated. The second test is needed to confirm that the infection is cured as reinfection by an untreated or undertreated partner is common. Having had and been cured of chlamydia doesn’t protect you from future exposures. You can catch the infection again and again, so get retested if you have a new partner.
  • Screening for gonorrhea also is recommended in sexually active women under age 25.
  • Men who have Sex with Men – Compared with other groups, men who have sex with men run a higher risk of acquiring STD’s. Many public health groups recommend annual or more frequent STD screening for these men. Regular tests for HIV, syphilis, chlamydia, and gonorrhea are particularly important. Evaluation for hepatitis B also may be recommended.
  • People with HIV – If you have HIV, it dramatically raises your risk of catching other STD’s. Experts recommend immediate testing for syphilis, gonorrhea, chlamydia, and herpes after being diagnosed with HIV. People with HIV should also be screened for hepatitis C.
    Women with HIV may develop aggressive cervical cancer, so they should have a pap test within a year of being diagnosed with HIV, and then again six months later.
  • People who have a New Partner – Before having vaginal or anal intercourse with new partners, be sure you’ve both been tested for STD’s. Keep in mind that human papillomavirus (HPV) screening isn’t available for men. No good screening test exists for genital herpes for either sex, so you may not be aware you’re infected until you have symptoms.

It’s also possible to be infected with an STD yet still test negative, particularly if you’ve recently been infected.


STD’s caused by bacteria are generally easier to treat. Viral infections can be managed but not always cured. If you’re pregnant and have an STD, prompt treatment can prevent or reduce the risk of infection of your baby. Treatment usually consists of one of the following, depending on the infection:


  • Antibiotics, often in a single dose, can cure many sexually transmitted bacterial and parasitic infections, including gonorrhea, syphilis, chlamydia and trichomoniasis. Typically, you’ll be treated for gonorrhea and chlamydia at the same time because the two infections often appear together. Once you start antibiotic treatment, it’s crucial to follow through. If you don’t think you’ll be able to take medication as prescribed, tell your doctor. A shorter, simpler treatment regimen may be available. In addition, it’s important to abstain from sex until you’ve completed treatment and any sores have healed.

Antiviral Drugs

  • Herpes: You’ll have fewer herpes recurrences if you take daily suppressive therapy with a prescription antiviral drug. Antiviral drugs lessen the risk of infection, but it’s still possible to give your partner herpes.
  • HIV: Antiviral drugs can keep HIV infection in check for many years. But the virus persists and can still be transmitted, though the risk is lower. The sooner you start treatment, the more effective it is. Once you start treatment — if you take your medications exactly as directed — it’s possible to lower your virus count to nearly undetectable levels.

If you’ve had an STD, ask your doctor how long after treatment you need to be retested. Doing so ensures that the treatment worked and that you haven’t been reinfected.

(Made possible by the Mayo Clinic)

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