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Acid fast

Reviewer: Nat Pernick, M.D. (see Reviewers page)
Revised: 26 August 2013, last major update August 2013
Copyright: (c) 2002-2013, PathologyOutlines.com, Inc.
PubMed Search: Acid fast[title]


Acid fast organisms

Acid fast methods

Micro images


Oocysts: modified acid-fast stain

Stool specimen (Ziehl-Neelsen)

Oocysts: auramine-rhodamine stain


Acid-fast stain

Cyclospora oocysts stained with modified acid-fast stain (fig H/I)


Acid-fast stain

Mycobacterium tuberculosis:

Ziehl-Neelsen stains

Auramine stain of lung

Skin biopsies

Mycobacterium avium complex:

Site-unknown, breast and colon (Ziehl-Neelsen, left to right)

Lymph node post bCG
vaccination (Ziehl-Neelsen)

Mycobacterium leprae:

Liver (Fite stain)


Fite-Faraco modified acid fast stain of lung


A: colonic polyp, B: duodenum
C: supraclavicular lymph node

Tuberculous lymphadenopathy (Ziehl-Neelsen)

Pleural fluid


Acid fast procedure

End of Stains > Acid fast

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