Mycobacterium tuberculosis Culture and Sensitivity (Qualitative)

What This Test Measures

This test involves growing a sample of your respiratory secretions (such as sputum) in a controlled environment to detect the presence of *Mycobacterium tuberculosis*. If the bacteria are found, it confirms a potential TB infection, which may require additional diagnostic tests and treatment.

How the Test Works

A sample (e.g., sputum) is collected and cultured in a lab setting. Over time, if *Mycobacterium tuberculosis* is present, it will grow into colonies that can be identified under a microscope or through further testing. This process helps determine whether you need further evaluation for TB.

When You Might Need This Test

Your healthcare provider may recommend this test if you have symptoms like persistent cough, fever, weight loss, or chest pain—especially if you live in an area with higher TB rates or have risk factors like weakened immune systems, recent travel to high-risk regions, or exposure to someone with active TB.

What to Expect Before the Test

You’ll likely need to provide a sample (e.g., sputum) by coughing into a sterile container. If you have difficulty producing sputum, your provider may guide you through techniques or use a different sample type (e.g., induced sputum). Follow any instructions for fasting or avoiding certain medications if specified.