AFB C/S (Hairs for Mycobacterium Tuberculosis)

Specimen Required

HAIRS

Fasting Required

Purpose of the Test

The AFB C/S (Acid-Fast Bacilli Culture and Sensitivity) test for hair samples is used to detect the presence of Mycobacterium tuberculosis (MTB) in a patient’s hair. The test helps diagnose TB infection in patients who present with symptoms such as cough, fever, weight loss, and night sweats.

When this test is required

The test requires a sample of the patient’s hair, which is collected from the affected area of the scalp. The hair sample is then sent to a laboratory for analysis. In the laboratory, the hair is processed and cultured in a special medium that promotes the growth of MTB. If MTB is present in the hair sample, it will grow within the culture, and the laboratory can then identify the organism and perform a sensitivity test to determine which antibiotics will effectively treat the infection.

What the Test Detects

Preparation for the Test

Before the test, it is important to inform the doctor if you are taking any medications that may interfere with the test results. The doctor may advise you to stop taking certain medications for a specified period before the test.

Sample Requirements

To perform the AFB C/S test, a sample of hair is collected from the affected area of the patient’s scalp. The sample is then sent to a laboratory for analysis. It is essential to collect the sample carefully to ensure accuracy.

Additional Notes

It is important to note that a negative AFB C/S test does not necessarily rule out the possibility of TB infection. False negatives can occur due to a variety of reasons, including improper sample collection, improper transport or storage of the sample, or low levels of MTB in the sample. Therefore, a clinical diagnosis should not be based solely on the results of this test, and additional diagnostic tests, such as chest X-rays, may be necessary.

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