acid-fast

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acid-fast

 [as´id-fast]
not readily decolorized by acids after staining; said of bacteria, especially Mycobacterium tuberculosis.

ac·id-fast

(as'id-fast),
Denoting bacteria that are not decolorized by acid-alcohol after having been stained with dyes such as basic fuchsin; for example, the mycobacteria and nocardiae.

acid-fast

(as´id-fast) not readily decolorized by acids after staining.

acid-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.

ac·id-fast

(as'id-fast)
Denoting bacteria that are not decolorized by acid-alcohol after having been stained with dyes such as basic fuchsin; e.g., the mycobacteria and a few nocardiae.

acid-fast

bacteria that retain acidic microbiological stains

ac·id-fast

(as'id-fast)
Denoting bacteria that are not decolorized by acid-alcohol after having been stained with dyes such as basic fuchsin.

acid-fast

1. not readily decolorized by acids after staining; said of bacteria, especially Mycobacterium spp.
2. stain demonstrating this characteristic. See also Ziehl-Neelsen stain.

modified acid-fast bacteria
resist decolorization by mild acid solutions; includes Brucella and Nocardia.
References in periodicals archive ?
Microscopic examination showed 04 acid fast bacilli / 100 fields, histopathology revealed chronic granulomatous inflammation with necrosis and there was no evidence of malignancy.
Slides were stained with routine ZN, Kinyoun and fluorescent staining technique using Auramine O and Rhodamine B to demonstrate the presence of acid fast bacilli in tissue.
Chandra T J, Dash S, Srinivas G, Prabhakara Rao PV, A study on rapid confirmation of pulmonary tuberculosis in smear-negative acid fast bacilli cases by using fiberoptic bronchoscopy, done through a trans oro pharyngeal spacer, J.
Key words: Tuberculosis (TB), Mycobacterium tuberculosis (MTB), pulmonary tuberculosis (PTB), acid fast bacilli (AFB), Ziehl Neelsen staining (ZN), Lowenstein-Jensen medium (LJ).
We feel that fiberoptic bronchoscopy is a useful procedure to establish the diagnosis of pulmonary tuberculosis when sputum smear examination does not show acid fast bacilli.
Histologic examination of lung and extrapulmomary tissue examined in the study revealed heterogeneous morphology and distribution of acid fast bacilli.
Wherever possible, histopathological demonstration of caseating granuloma and acid fast bacilli should be attempted.
Key words: Acid fast bacilli, smear, tuberculosis; pulmonary TB, sputum.
Furthermore, it has been demonstrated that acid fast bacilli are excreted in the milk of not only lepromatous patients but also of tuberculoid, borderline-tuberculoid and borderline leprosy; and have also been demonstrated in non-lactating breast secretions.
The laboratory people must ensure examining at least 200-300 oil immersion fields in search of the acid fast bacilli before reporting a sample negative for it.
Data was reviewed, including clinical history, availability of acid fast bacilli stain on tissue and mycobacterium tuberculosis culture results.