acid-fast

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ac·id-fast

(ăs′ĭd-făst′)
adj.
Not decolorized by acid after staining, as bacteria that retain dye after an acid rinse.
ac′id-fast′ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

acid-fast

adj
(Microbiology) (of bacteria and tissues) resistant to decolorization by mineral acids after staining
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ac′id-fast`



adj.
resistant to decolorizing by acidified alcohol after staining.
[1900–05]
ac′id-fast`ness, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.acid-fast - not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis)
imperviable, impervious - not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in periodicals archive
Slit-skin smear from the earlobe revealed numerous acid-fast bacilli with globi (Figure 3).
Leprosy presenting as immune reconstitution inflammatory syndrome - report of three cases
Necropsy and histologic investigation identified reduction in the diameter of the vertebral canal and spinal cord at cervical segments 8-9 with coalescing granulomas and intralesional acid-fast bacilli within the intertrabecular space, left side of the clavicular air sac, and cranial left lung.
J Zoo Wildl Med.: Multifocal respiratory and vertebral mycobacteriosis in a red-tailed hawk (Buteo jamaicensis)
Cytomorphology with acid-fast staining is a valuable diagnostic tool in cases of tuberculosis.
Comparison of fine-needle aspiration technique with Ziehl-Neelsen stains in diagnosis of tuberculous lymphadenitis
The bacterial tissue cultures, blood cultures, acid-fast bacilli smears and cultures on tissue failed to demonstrate any pathogenic organisms.
Cases in clinical microbiology
Tuberculosis is diagnosed on finding acid-fast bacilli (AFB) on direct microscopic examination of sputum smear but this is not a very sensitive technique2 and almost 50% cases with tuberculosis can present with negative results3,4.
Role of mycobacterium culture in the diagnosis of smear negative pulmonary tuberculosis suspects attending tertiary care setting
A definitive preoperative diagnosis is frequently difficult to obtain since acid-fast bacilli smears or cultures, fine-needle aspiration and polymerase chain reaction (PCR) are often falsely negative.
Tuberculous empyema presenting as a persistent chest wall mass: case report
The pus stained positive for bacteria and acid-fast bacilli, and culture was positive for Proteus vulgaris and mycobacteria.
Complicated coexisting pyogenic and tuberculous otitis media affecting the temporozygomatic, infratemporal, and parotid areas: report of a rare entity
We suggest 2 helpful although not so popular diagnostic methods--autofluorescence and acid-fast stain--for easy detection of CLCs.
Demonstration of Charcot-Leyden crystals in eosinophilic cystitis
Ziehl-Neelsen staining often fails to demonstrate acid-fast bacilli, and diagnosis rests on the detection of typical histological changes.
Intramyocardial tuberculosis--a rare underdiagnosed entity
Peritoneal biopsy was negative for malignancy, acid-fast bacilli and Mycobacterium tuberculosis (MTB) complex DNA.
Tuberculosis resembling a malignant tumour
Background & objectives: Improper practices of making direct smears of sputum for detection of acid-fast bacilli (AFB) and of disposing sputum cups are hazardous.
Phenol ammonium sulphate basic fuchsin staining of sputum in pot for the detection of acid-fast bacilli
The tissue sections were negative for acid-fast bacilli (AFB) by the Ehrlich-Ziehl-Neelsen stain, and cultures of the biopsy material and blood were negative.
Lupus vulgaris in a pediatric patient: a clinicohistopathological diagnosis
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