Acid-Fast Bacillus (AFB) Testing helps diagnose mycobacterium tuberculosis (TB) infections, and acid-fast bacilli (AFB) infections.
The result is either positive or negative.
What does the result tell?
- A negative result may mean that no infection is present. That is to say, a “negative” is normal.
- However, a negative result cannot exclude the possibility of mycobacterial infection. So, additional samples and tests are needed if you’re worried.
- On the other hand, a positive AFB smear suggests a high possibility of mycobacterial infection.
- Nevertheless, a positive result is still not enough to make a medical decision. A bacteria culture is necessary for specific diagnosis.
Keywords: Acid-Fast Bacillus (AFB) Testing; Acid-Fast Bacillus Smear and Culture and Sensitivity; Acid-Fast Bacillus Testing; AFB Smear and Culture; Mycobacteria Culture; Mycobacteria Smear; Mycobacteria tuberculosis Nucleic Acid Amplification Test; TB Culture and Sensitivity; TB NAAT