acid-fast
1
8.6
- adjective
- /ˈæsɪd fæst/
- Specialized
- The histology of the excised tissue revealed an inflammatory change with no evidence of granuloma, acid-fast bacilli, or tumor infiltration.
- acid-fast bacilli
- acid-fast staining
- acid-fast bacilli smear
Examples
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The acid-fast stain for mycobacteria and the Gomori methenamine silver stain were negative.
Academic text (2008) -
The majority of patients had positive acid-fast bacilli smear results, and nearly one-quarter had both extrapulmonary and pulmonary TB disease.
Academic text (2014) -
Granulomas with numerous acid-fast organisms were confirmed by the Agriculture Alberta laboratory.
Academic text (1992) -
Special stain and tissue culture for acid-fast bacilli are confirmatory but often yield a negative result.
Academic text (2007) -
Negative results for intestinal fluid cultures for bacterial species or acid-fast bacillus were confirmed.
Academic text (2012) -
Sputum samples did not reveal acid-fast and alcohol-fast bacilli, and the culture results were negative.
Academic text (2007) -
One was diagnosed after surgical pathology revealed acid-fast bacilli on frozen-section analysis.
Academic text (2005) -
Fourteen specimens were tested using acid-fast staining for ova and parasites.
Academic text (2008) -
Bronchoscopy was done, and bronchoalveolar lavage was negative for acid-fast bacilli as well as malignant cells.
Academic text (2007) -
The laboratory confirmed the presence of acid-fast bacilli in the patient's sputum samples.
Surface Forms
Morphology
Etymology
The word acid-fast combines acid and fast, and here fast means 'held firmly', like in the phrase 'hold fast'. So acid-fast bacteria hold the dye and do not lose it when they are washed with acid, which is why the word describes bacteria that keep their color after an acid wash.