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 ?
In the more disfiguring and widely recognized lepromatous form, lesions show dense infiltration with acid-fast bacilli (8).
The histochemical stain results for acid-fast bacilli (Ziehl-Neelsen) and fungi (Gomori methenamine-silver stain) were likewise negative.
5) The organisms may be acid-fast with the Ziehl-Neelsen stain, however, this too depends on its growth media and the age of the culture.
Sputum samples were now positive for acid-fast bacilli.
Confirmation requires the demonstration of acid-fast bacilli by special stains or growth of Mycobacterium tuberculosis on culture.
For diagnosing tuberculosis and determining the severity of a patient's illness, TB control programs worldwide rely on a test called the acid-fast bacilli (AFB) smear.
They then found acid-fast bacteria -- which turn the same color as tuberculosis bacteria when exposed to a particular stain -- in lesions on the spinal column of a pre-Columbian child.
Smear microscopy allows for direct detection of acid-fast bacilli (AFB) in the specimen and makes it possible to identify the most infectious patients.
To the Editor: Leprosy (Hansen disease) is caused by Mycobacterium leprae, an extremely slow-growing, intracellular, acid-fast bacillus with a typical incubation period [greater than or equal to] 2-5 years, ranging up to 20 years.
Birds were considered cured if no macroscopic or microscopic lesions consistent with active mycobacteriosis were identified in any organ; the liver, spleen, and bone marrow were culture and PCR negative; and acid-fast organisms were not seen in Ziehl-Neelsen-stained sections in any organ.