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ID#:2189
Description:Caption:
Under a magnification of 1000X, this photomicrograph of a sputum smear, processed using a fluorescence acid-fast staining method that implements acridine orange fluorescent dye as a counterstain, revealed the presence of a Mycobacterium tuberculosis bacterium. M. tuberculosis is an acid-fast bacterium (AFB), and is therefore, undetectable when stained using a Gram stain technique. However, using the Smithwick method, which employs acridine orange as the specific dye, the M. tuberculosis bacteria glow yellow under ultraviolet light microscopy.
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Content Providers(s):CDC/ Ronald W. Smithwick
Creation Date:1971
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

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