A positive acid-fast organism would stain:
red/pink
A positive acid-fast organism would stain pink or red in color after the Ziehl-Neelsen staining procedure. This staining technique is commonly used to detect the presence of mycobacteria, such as Mycobacterium tuberculosis, which are acid-fast organisms that are resistant to decolorization by acid-alcohol. The acid-fast staining method involves the use of strong acids to penetrate and bind to the mycolic acid in the cell wall of the bacteria, which makes the organism resistant to decolorization. After staining and rinsing with acid-alcohol, the acid-fast positive organisms retain the primary stain even when exposed to an acidic environment and appear pink or red under the microscope.
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