TB Quantiferon®‑TB Gold
The Quantiferon®‑TB Gold test is an advanced blood test used to detect infection with Mycobacterium tuberculosis,
the bacteria responsible for tuberculosis (TB). It belongs to a group of tests known as interferon‑gamma release assays (IGRAs).
These tests measure how the immune system reacts when exposed to specific TB proteins in a laboratory setting.
Unlike the traditional Mantoux skin test, the Quantiferon test requires only a single blood sample and is not affected by
prior BCG vaccination. This makes it a highly accurate and convenient method for screening individuals for tuberculosis
infection.
- Price: £129
- Code: TBQ
- TAT: 4 Working Days
- Sample Type: Blood
Clinical Significance
Tuberculosis remains one of the most significant infectious diseases worldwide. Many individuals infected with TB bacteria
do not develop symptoms immediately. Instead, the bacteria remain dormant in the body, a condition known as latent tuberculosis
infection.
Although latent TB does not cause illness or spread infection, it may reactivate later if the immune system weakens.
Identifying latent TB allows doctors to provide preventive treatment and reduce the risk of progression to active disease.
The Quantiferon‑TB Gold test measures the amount of interferon‑gamma released by immune cells when exposed to TB antigens.
A strong immune response indicates that the body has previously encountered TB bacteria.
Who Might Benefit From This Test?
The test is widely used for occupational health screening, immigration medical requirements, and pre‑employment health
assessments. Healthcare workers, laboratory staff, and individuals working in high‑risk environments may require routine TB testing.
It is also recommended for individuals who have been in close contact with someone diagnosed with tuberculosis or
for people with weakened immune systems who may be at higher risk of developing active infection.
Sample Collection
The test requires blood collection into specialised Quantiferon tubes. Typically four tubes are used to ensure accurate
measurement of immune response. The samples must be processed promptly to maintain reliability and accuracy.
Understanding Your Results
A positive result suggests that the immune system has been exposed to TB bacteria. Further evaluation, including
chest imaging or microbiological testing, may be required to determine whether the infection is latent or active.
A negative result usually indicates that TB infection is unlikely, although early infection or severe immune suppression
can occasionally affect the result.
FAQs
When will I receive my results?
Results are usually available within the stated turnaround time.
Should I discuss my results with a doctor?
Yes, results should always be reviewed with a qualified healthcare professional.
Why Choose Marylebone Diagnostic Centre?
Marylebone Diagnostic Centre provides reliable tuberculosis screening using internationally recognised Quantiferon
technology. With a turnaround time of approximately 4 days, results are delivered quickly to support occupational,
clinical, or immigration requirements.
Book Now
Book the TB Quantiferon®‑TB Gold (TBQ) test today for accurate and convenient tuberculosis screening.
