AFB Smear and Culture
From Health Facts
Latest Edit: Hector 2014-03-21 (EDT)
|See Also||Lab Tests|
- This test may be indicated in cases of a chronic cough, weight loss, fever, chills and weakness in order to determine if the symptoms are due to tuberculosis or another mycobacterial infection.
- Indicated after a positive TB screening tests, especially if you are in a high-risk group for progressing to active disease.
- Acid-fast bacilli (AFB) are a group of rod-shaped bacteria, the most common one belonging to the genus Mycobacterium.
- For suspected cases of tuberculosis lung infections, three sputum samples are collected early in the morning on different days.
- A bronchoscope may be used to collect fluid for those unable to produce sputum.
- In children, gastric washings/aspirates may be collected.
- Depending on symptoms, urine, or aspirate from the site of suspected infection, cerebrospinal fluid (CSF), other body fluids, or biopsied tissue samples may be submitted for AFB smear and culture.
- Indicates that no infection is present.
- Indicates a probable mycobacterial infection. A culture is required to confirm a positive diagnosis.
- TB Screening Tests, Bacterial Wound Culture, Susceptibility Testing, Mycobacteria tuberculosis nucleic acid amplification test, TB NAAT, Body Fluid Analysis, Sputum Culture, Adenosine Deaminase.
- Pagana Kathleen D, Pagana Timothy J (2006) Mosby's Manual of Diagnostic and Laboratory Tests, Mosby.
- Weatherby Dicken, Ferguson Scott (2002) Blood Chemistry and CBC Analysis: Clinical Laboratory Testing from a Functional Perspective, Bear Mountain.