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 ?
However, sarcoid granulomas have no unique features, therefore stains for acid-fast bacilli and fungi must be obtained to eliminate infectious etiologies.
AII precautions may be discontinued when contagious TB disease is considered unlikely and either 1) another diagnosis is made that explains the clinical syndrome or 2) the patient has three consecutive sputum smears negative for acid-fast bacilli on microscopy.
Histology demonstrated active necrotizing granulomatous inflammation with a Ziehl-Neelsen stain positive for acid-fast bacilli, consistent with tuberculosis infection (Fig.
These bacteria are commonly known as tubercle bacilli or acid-fast bacilli as they form granuloma or tubercle in diseased tissue (Robbins et al.
A Ziehl-Neelsen stain of the buffy coat showed acid-fast bacilli in the phagocytic cells, and the diagnosis of HPS associated with Mycobacterium tuberculosis was confirmed by blood cultures and polymerase chain reaction.
The smear was checked for acid-fast bacilli under oil immersion and reported according to the Revised National Tuberculosis Control Program (RNTCP laboratory module - 1999).
To determine the sensitivity and specificity of the ELISpot test, the researchers recruited 347 patients suspected of having TB, but who were either unable to produce sputum, or who had had three consecutive negative acid-fast bacilli sputum culture results.
An early morning sputum specimen was sent for TB assessment and all samples were negative for acid-fast bacilli.