Certain testing centers provide either anonymous (the name is never given) or confidential (the name is given but kept private) HIV testing and counseling. There are a few different ways a person can get access to HIV screening: A blood or oral sample can be collected in a health practitioner's office or a local clinic and sent to a laboratory for testing. p24 antigen testingûthis is used alone without the antibody test only in rare cases when there is a question about interference with an HIV antibody test. HIV antibody tests can detect infections in most people 3-12 weeks after exposure. These tests are available as blood tests or tests of oral fluid. detect HIV-1 and some tests have been developed that can also detect HIV-2. HIV antibody testingûall HIV antibody tests used in the U.S. These tests can detect HIV infections in most people by 2-6 weeks after exposure. By detecting both antibody and antigen, the combination test increases the likelihood that an infection is detected soon after exposure.
A few weeks after exposure, antibodies to HIV are produced in response to the infection and remain detectable in the blood thereafter, making the antibody test useful for detecting infections weeks after exposure. Testing for p24 allows for detection of early infections, before HIV antibody is produced. (HIV-1 is the most common type found in the United States, while HIV-2 has a higher prevalence in parts of Africa.) The level of p24 antigen and the amount of virus (viral load) increase significantly soon after initial infection.
#WESTERN BLOT HIV PLUS#
It detects the HIV antigen called p24 plus antibodies to HIV-1 and HIV-2. Screening Different types of tests may be used for HIV screening: Combination HIV antibody and HIV antigen testûthis is the recommended screening test for HIV. Also, if a person knows his or her HIV status, it may help change behaviors that can put him or her and others at risk. Early detection and treatment of HIV infection and immune system monitoring can greatly improve long-term health and survival. HIV antibody and HIV antigen (p24) testing is used to screen for and diagnose HIV infections.
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