Getting tested for HIV can be scary, but the condition can be managed with treatment. So be sure to get tested if you think you have been exposed. If you test positive, early detection and monitoring of HIV will help your doctor find out whether the disease is getting worse and when to start treatment.
Your doctor may recommend counseling before and after HIV testing, and it is usually available at the hospital or clinic where you will be tested. This will give you an opportunity to:
HIV is diagnosed only after two or more positive ELISA tests are confirmed by one positive Western blot assay. These tests usually can be done on the same blood sample.
It can take as little as 2 weeks or as long as 6 months from the time you become infected with HIV for the antibodies to be detected in your blood. This is commonly called the "window period," or seroconversion period. During the window period, you are contagious and can spread the virus to others. If you think you have been exposed to HIV but you test negative for it, you should be tested again. Tests at 6, 12, and 24 weeks can be done to be sure you are not infected.
Testing positive for HIV will probably make you anxious and afraid about your future. The good news is that people being treated for HIV are living longer than ever before with the help of medicines that can often prevent AIDS from developing. Your doctor can help you understand your condition and how best to treat it.
If you test positive for HIV, your doctor will complete a medical history and physical exam. He or she may order several lab tests to evaluate your overall health condition and identify current or previous infections that may become more complicated because of HIV. These tests include:
Some strains of HIV may be resistant to certain medicines. If you tested positive for HIV, your doctor may test you at this stage to see if you have been infected with a drug-resistant strain of HIV. This will help him or her figure out which medicines to use when the infection is treated.
Your doctor will use the results of the physical exam and lab tests at later exams to find out the progression of HIV.
The Centers for Disease Control and Prevention (CDC) recommends HIV screening as part of routine blood testing. You and your doctor can decide if testing is right for you.
Most test facilities will have the ELISA test results in 2 to 4 days. Results of the Western blot take longer, 1 to 2 weeks. Rapid antibody tests are available that give results right away. But positive results of the rapid test need to be confirmed by a ELISA or Western blot test.
Call and ask for your HIV test results if you have not been contacted within 1 to 2 weeks of being tested.
Denial, fear, and depression are common reactions to a diagnosis of HIV. Don't be afraid to ask for the emotional support you need. If your family and friends are unable to provide you with support, a professional counselor can help.
Two tests will be done regularly to monitor how much HIV is in your blood (viral load) and how the virus is affecting your immune system. The results of these tests will help you make decisions about starting highly active antiretroviral therapy (HAART) or switching to new medicines if the ones you are currently taking are not effective.
HIV often changes or mutates in the body. Sometimes these changes make the virus resistant to a particular medicine or class of medicines. This means the medicine can no longer slow down or prevent the virus from multiplying or protect the immune system.
Two blood tests are available to detect drug resistance in the virus:
The U.S. Department of Health and Human Services (DHHS) recommends that HIV genotype testing should be done for everyone when first diagnosed with HIV infection.5 The results can tell if a person is infected with a resistant strain of HIV. This information helps develop a treatment approach to use when treatment is started.
You also may be tested for drug resistance when you are ready to begin treatment, viral load numbers stop declining during treatment, or viral load numbers become detectable after not being detectable while on treatment.
Drug resistance can occur when:
Other medicines are available that may treat some resistant strains of HIV.
AIDS is the last and most severe stage of HIV infection. It is diagnosed if the results of your test show that you have:
The U.S. Centers for Disease Control and Prevention (CDC) recommends that everyone should get tested for HIV as part of their regular medical care. Also, the United States Preventive Services Task Force (USPSTF) recommends screening tests for HIV if:
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