Mycobacterium tuberculosis (TB) Testing
Allstate Lab in Los Angeles offers advanced TB testing using the QuantiFERON-TB Gold Plus (QFT-Plus), a highly accurate and reliable diagnostic method for detecting latent tuberculosis infection. Conducted in our state-of-the-art laboratory, this test ensures fast and secure results within 24-48 hours. For added convenience, our professional nursing staff provides at-home specimen collection services to meet your testing needs.

TB Lab Testing Services in Los Angeles
What is Tuberculosis (TB)?
Tuberculosis (TB) is a bacterial infection caused by Mycobacterium tuberculosis, which spreads through airborne droplets when an infected person coughs, sneezes, or talks. While TB primarily affects the lungs, it can also cause significant damage to other critical organs, including the brain, spine, and kidneys.
Who is at Higher Risk for Tuberculosis (TB)?
Certain individuals are more vulnerable to TB infection, especially after exposure. High-risk groups include:
- People who work or live in high-exposure environments such as healthcare settings, homeless shelters, or correctional facilities.
- Individuals with weakened immune systems.
- Those with medical conditions such as HIV/AIDS, autoimmune disorders, or diabetes that impair the body’s ability to fight infections.
- Individuals with a history of alcohol abuse or illegal drug use.
- People who were previously treated inadequately for TB.
- Children under the age of 5.
- Adults aged 55 and older.
It’s important to note that not everyone infected with TB bacteria will develop symptoms. TB manifests in two primary forms:
- Latent TB Infection: The bacteria remain dormant in the body without causing symptoms.
- Active TB Disease: The bacteria cause illness and can be spread to others. TB disease is treatable with antibiotics but can be fatal if not addressed properly.
How is Tuberculosis (TB) Tested?
Tuberculosis is diagnosed using the QuantiFERON-TB Gold Plus (QFT-Plus) test, a blood-based interferon-gamma release assay. This FDA-approved diagnostic method measures the body’s immune response to TB-specific antigens, aiding in the detection of Mycobacterium tuberculosis infection.
When Should You Order a QuantiFERON-TB Gold Plus Test?
Consider a QuantiFERON-TB test if you experience any of the following symptoms:
- Persistent chills and fever.
- Night sweats.
- Unexplained weight loss.
- Loss of appetite.
- Fatigue or general weakness.
- Chronic cough lasting more than three weeks.
- Coughing up blood or mucus.
- Chest pain or discomfort.
How is the QuantiFERON Test Performed?
The test involves a simple blood draw using a needle and collection tube. Once the sample is obtained, it is processed and analyzed in our state-of-the-art laboratory. Results are securely delivered within a short timeframe, providing clear insights for diagnosis.
At Allstate Lab, we’re committed to providing accurate, reliable TB testing services to support your health and peace of mind.

