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 ?
These samples were negative by acid-fast staining and mycobacteria culture.
Although caseating granulomas and/or acid-fast bacilli are definite evidence of TB infection, only 11 biopsy specimens obtained endoscopically were shown to be confirmative ITB in this study.
2%) were identified as potential positives by the presence of gross internal tissue nodules and acid-fast bacteria in tissue smears (Fig.
Concomitant acid-fast microscopy of serial sputum specimens is also needed when excluding nontuberculosis mycobacterial disease.
Slit-skin smear from the earlobe revealed numerous acid-fast bacilli with globi (Figure 3).
Cream to white-colored colonies appearing on the paraffin-coated glass rod were selected and subcultured on nutrient agar, and were then purified and stained with Gram, modified Kinyoun acid-fast (partially acid-fast) and Kinyoun acid-fast (cold procedure).
The authors observed that broad abscesses with a weak-to-absent granulomatous response were more characteristic of biopsies from immunocompromised patients, and that acid-fast bacilli were more likely to be seen in these instances.
Concentrated stool smears confirmed positive for oocysts by modified acid-fast staining were considered for modified negative staining technique.
It was concluded from the study that infection of MAP could be precisely identified by histopathology and indirect ELISA, which tends to be unlikely if merely based upon acid-fast staining and gross examination.
The pus stained positive for bacteria and acid-fast bacilli, and culture was positive for Proteus vulgaris and mycobacteria.