Acid-fast bacilli are bacteria that resist decolorization with acid alcohol after staining with a primary stain (typically carbolfuchsin). This unique characteristic is due to the presence of a waxy, lipid-rich cell wall, which makes them difficult to stain with conventional methods.
Here's a breakdown:
* Acid-fast staining: A special staining technique used to identify bacteria with a waxy cell wall.
* Bacilli: Rod-shaped bacteria.
The most important examples of acid-fast bacilli are:
* Mycobacterium tuberculosis: The bacterium responsible for tuberculosis (TB).
* Mycobacterium leprae: The bacterium responsible for leprosy (Hansen's disease).
Why are they important to know?
Identifying acid-fast bacilli is crucial in diagnosing and treating infectious diseases caused by these bacteria. For example, detecting Mycobacterium tuberculosis in a sputum sample is essential for diagnosing TB.
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