The answer depends largely on timing.
One of the most common questions we are asked is:
“Which HIV test should I have?”
The answer depends largely on timing.
Modern HIV testing is remarkably accurate, but different tests become positive at different stages following infection. The most appropriate test therefore depends not only on the level of risk, but also on how long ago the potential exposure occurred.
At The Wright Practice, we commonly use three different HIV testing strategies through The Doctors Laboratory (TDL):
Each test serves a different purpose.
This remains the cornerstone of modern HIV screening.
The test detects:
Because it combines two different markers of infection, it offers excellent sensitivity whilst maintaining outstanding accuracy.
For most patients, this is the preferred HIV screening test.
Typical uses include:
Current UK practice generally regards a negative laboratory fourth-generation HIV test at six weeks following exposure as conclusive in most circumstances.
Advantages
Limitations
This test is designed for early detection.
Rather than looking for antibodies or antigens, it detects viral genetic material directly.
The panel includes:
Because viral genetic material may become detectable before antibodies develop, this test can provide useful information much earlier than conventional screening.
Typical uses include:
Advantages
Limitations
This is one of the earliest HIV-specific tests currently available.
The test detects HIV-1 RNA directly and is designed to identify infection before antigen or antibody responses have fully developed.
Typical uses include:
Advantages
Limitations
Exposure Within The Last 72 Hours
The priority is not testing.
The priority is urgent assessment for Post-Exposure Prophylaxis (PEP).
PEP must be started within 72 hours and becomes less effective as time passes.
Exposure Approximately 10-14 Days Ago
This is often when HIV RNA testing or PCR/NAAT testing becomes most useful.
Patients frequently want meaningful information as early as possible, and molecular testing may provide reassurance at a stage when conventional screening tests are still within their window period.
Exposure More Than Six Weeks Ago
For most patients, a laboratory HIV 1 & 2 Abs/p24 Ag (4th Generation HIV DUO) test is the preferred investigation.
At this stage, fourth-generation testing provides extremely reliable results and remains the gold-standard screening approach.
In certain circumstances, a staged testing strategy may be appropriate.
For example:
This approach allows patients to benefit from both early information and definitive later testing.
Rather than recommending the same HIV test to every patient, we tailor testing according to:
In many cases, the most important question is not:
“What is the best HIV test?”
but rather:
“What is the best HIV test for me today?”
Our role is to help answer that question and ensure that testing provides meaningful, accurate and clinically useful information.
Wow! Dr. Dan was extremely knowledgeable and attentive to my health and well being. I’m so glad to have found him!
I have been going to Dr Wright for a number of years now. He is highly knowledgeable, compassionate, open minded and efficient, I couldn’t recommend him highly enough
I have been a patient of Doctor Dan for some time and continue to consult with him despite having left the UK. Dan has the enthusiasm and energy of a young man, whilst taking the holistic “physician” approach of an old school family doctor, equipped with the most modern insights and technology.
Dr Jain was great. Expert knowledge with practical advice
Schedule a consultation | Call: +44 (0)207 139 1833 | Email: info@thewrightpractice.com
101 Harley Street, London, W1G 6AH
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