ID#: 13371
This photomicrograph of a Smithwick, fluorescent acid-fast stained sputum smear, revealed the presence of Mycobacterium tuberculosis bacteria. 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 stain, the M. tuberculosis bacteria glow yellow under ultraviolet light microscopy.
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Content Provider(s): CDC/ Ronald W. Smithwick
Creation Date: 1971
Photo Credit:
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.