Afb Antibiotic Susceptibility, 5 Drugs

AFB Antibiotic Susceptibility, 5 Drugs

What it is

The AFB (Acid-Fast Bacilli) Antibiotic Susceptibility test with 5 drugs checks how Mycobacterium species, such as Mycobacterium tuberculosis, respond to five key anti-tuberculosis medications. It helps determine whether the bacteria are resistant or sensitive to standard TB drugs, which is crucial for effective treatment planning.

Uses

This test is primarily used to guide the treatment of tuberculosis (TB). It helps identify drug-resistant TB strains, supports clinicians in selecting the most effective antibiotic regimen, and is essential for monitoring cases of multidrug-resistant tuberculosis (MDR-TB).

Symptoms That May Lead to the Test

Doctors may order this test if a patient shows signs of tuberculosis, such as persistent cough lasting more than two weeks, fever, night sweats, weight loss, coughing up blood, or when a patient is not responding to standard TB therapy.

Abnormal Results

Resistant Result: Indicates the bacteria are resistant to one or more of the tested TB drugs, suggesting the need for an alternative treatment plan.

Sensitive Result: Indicates the bacteria are susceptible to the antibiotics, meaning the standard TB treatment regimen is likely to be effective.

Risks

There are no direct risks from the laboratory test itself. Risks are only related to the specimen collection, such as mild discomfort, coughing during sputum collection, or rarely dizziness. The test requires strict laboratory safety to prevent accidental exposure to TB bacteria.