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acid-fast

   Also found in: Medical, Wikipedia 0.02 sec.
ac·id-fast (sd-fst)
adj.
Not decolorized by acid after staining, as bacteria that retain dye after an acid rinse.
acid-fastness n.
acid-fast
adj
(Life Sciences & Allied Applications / Microbiology) (of bacteria and tissues) resistant to decolorization by mineral acids after staining
ThesaurusLegend:  Synonyms Related Words Antonyms
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"


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Although tuberculosis was suspected, no acid-fast bacilli were identified, and cultures were negative for mycobacteria; histologic examination showed noncaseating granulomata.
Misdiagnosing melioidosis by Handy, Rupert / Emerging Infectious Diseases
Stains for acid-fast bacilli with Grocott-Gomori methenamine-silver nitrate were negative.
Sarcoidosis presenting as a solitary parotid mass by Caushaj, Philip F. / Ear, Nose and Throat Journal
A transbronchial lung biopsy (Figure 2) showed interstitial chronic inflammation and collections of epithelioid cells suggestive of granulomas with negative stains for acid-fast bacilli and fungus and, on review, diagnostic of hypersensitivity pneumonitis.
Hypersensitivity pneumonitis associated with environmental ... by Milton, Donald / Environmental Health Perspectives
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