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Sexual Health > HIV Antibody & P24 Antigen
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In the initial weeks following HIV infection, the levels of P24 antigen in the bloodstream are notably elevated.
This characteristic allows the antibody p24 blood test to effectively detect HIV infection during its earliest stages, providing an opportunity for early diagnosis and prompt initiation of necessary medical interventions.
An HIV antibody test functions by detecting antibodies that the immune system produces in response to HIV infection. A small sample of blood is collected and sent to the laboratory for testing.
HIV generates its own proteins called antigens, which antibodies are designed to precisely target. These antibodies bind to the antigens to neutralise them. Thus, when the body faces an infection, corresponding antibodies actively engage in the fight against it.
If no HIV antibodies are detected, it typically indicates that you do not have HIV. If HIV antibodies are found, it indicates that you have been infected with HIV at some point. Further testing is usually conducted to confirm the result and determine the stage of infection.
The HIV Antibody & P24 Antigen test is crucial for detecting HIV (Human Immunodeficiency Virus), a virus that attacks the immune system and can lead to AIDS (Acquired Immunodeficiency Syndrome) if not treated.
The HIV Antibody & P24 Antigen test detects early markers of HIV: p24 antigen, present shortly after infection, and antibodies that the body develops in response.
This dual approach enables early detection, vital for prompt treatment and reducing virus transmission. Early treatment can significantly improve quality of life and longevity for those with HIV.
Individuals recommended to undergo HIV antibody and P24 antigen testing include those who engage in behaviours that increase the risk of HIV transmission, such as unprotected sex (especially with multiple partners or partners whose HIV status is unknown), and sharing needles or drug equipment.
HIV antibody and P24 antigen testing is also recommended for all adults and adolescents living in high-prevalence areas or populations. Individuals in a relationship with someone who is HIV-positive should consider regular testing, as should victims of sexual assault.
Additionally, HIV antibody and P24 antigen testing is recommended as a routine part of prenatal care to prevent mother-to-child transmission and for healthcare workers due to potential occupational exposure.
HIV infection progresses through several stages. These stages are generally categorised as follows:
Acute HIV Infection (Primary HIV Infection): This stage occurs within the first few weeks after initial infection. Symptoms can resemble flu-like illness. Viral replication is very active during this stage, leading to high levels of HIV in the blood.
Clinical Latency Stage (Chronic HIV Infection): This stage is also known as chronic or asymptomatic HIV infection. During this phase, HIV is still active but reproduces at very low levels. People may not have specific symptoms or only mild ones.
Symptomatic HIV Infection (Advanced HIV or AIDS): As HIV progressively damages the immune system and the number of CD4 cells (a type of immune cell) declines, symptoms may become more severe. AIDS (Acquired Immunodeficiency Syndrome) is diagnosed when the immune system is severely compromised, typically when the CD4 count drops below a certain level (200 cells/mm³).
HIV cannot be transmitted through casual contact such as hugging, shaking hands, sharing utensils, or mosquito bites. It is important to note that while other body fluids (like saliva, sweat, tears, urine, and faeces) can contain HIV, the concentration of the virus in these fluids is usually very low or negligible, making transmission through these fluids extremely rare or non-existent under normal circumstances.
HIV can be transmitted through blood, semen (including pre-ejaculate), vaginal fluids, rectal fluids, and breast milk.
We provide comprehensive sexual health testing services that include a consultation with a doctor. This consultation helps determine the most appropriate testing options based on your individual circumstances.
Other than the HIV I & II Antibody and P24 Antigen Blood Test, we also offer:
If you have had unprotected sex, we strongly recommend a general sexual health screening to ensure comprehensive care and early detection of any potential infections.
According to the latest estimates, in 2019, about 106,890 people in the UK were living with HIV. In 2021, in England alone, about 95,900 people were estimated to have HIV. Globally, at the end of 2022, 39 million people were living with HIV. The countries with the highest HIV figures include:
Use our online booking engine or book your test by giving us a call.
On the online booking engine select the “appointment type” you need.
You will be seen by one of our friendly doctors or trained clinicians.
Please arrive well-hydrated. For accuracy, the best window period for this test is 6 weeks after exposure, with early detection possible as early as 10 days post-exposure. Discuss your options with your nurse to ensure you receive the most appropriate care and information tailored to your needs.
The P24 test is conducted using a simple blood draw procedure. A needle is typically inserted into a vein, often located on the inner arm near the elbow, to collect a small amount of blood. During this process, you may experience a slight pinching sensation.
Confidentiality and privacy are fundamental aspects of our services. You have the option to choose whether you would prefer to receive your results via phone call or email, or if you would rather contact the clinic directly to obtain them.
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Please note that Walk-in Clinic is a private medical centre & not an NHS service. Harley Walk-in Clinic Ltd company registration no. 07472804