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.

Farlex Partner Medical Dictionary © Farlex 2012

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.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.

Medical Dictionary for the Dental Professions © Farlex 2012

References in periodicals archive ?

Slit-skin smear from the earlobe did not reveal acid-fast bacilli.

Leprosy presenting as immune reconstitution inflammatory syndrome - report of three cases

The chances of acid-fast bacilli (AFB) identification in tissue section are less because xylene and formalin affect the sensitivity of Ziehl-Neelsen (ZN) method to detect Mycobacterium tuberculosis in histopathology sections.[5]

Comparison of fine-needle aspiration technique with Ziehl-Neelsen stains in diagnosis of tuberculous lymphadenitis

Although formalin-induced autofluorescence and acid-fast stain of CLCs are probably nonspecific phenomena, use of the fluorescent microscope and the Ziehl-Neelsen stain can successfully help in the diagnosis of acute-phase EC, especially in samples with massive tissue necrosis.

Demonstration of Charcot-Leyden crystals in eosinophilic cystitis

No acid-fast bacilli were noted on Ziehl-Neelsen staining.

Intramyocardial tuberculosis--a rare underdiagnosed entity

A novel method of staining acid-fast bacilli in sputum containers.

Phenol ammonium sulphate basic fuchsin staining of sputum in pot for the detection of acid-fast bacilli

In summary, the diagnosis of cutaneous tuberculosis is based on clinical features, demonstration of acid-fast bacilli on smear, tissue culture, skin biopsy, and in recent years, PCR.

Lupus vulgaris in a pediatric patient: a clinicohistopathological diagnosis

Applicants with chest radiographs suggestive of tuberculosis now are required to submit three sputum specimens for both sputum smears for acid-fast microscopy and mycobacterial culture.

Revised Technical Instructions for Tuberculosis Screening and Treatment for Panel Physicians

Smears stained with ZN stain (Figure 2: Acid-fast bacilli in ZN stain, 100 X.) were examined under oil immersion objective for AFB.

Comparison of Ziehl-Neelsen stains with fine needle aspiration technique in diagnosis of tuberculous lymphadenitis in a tertiary care hospital, south bihar (India)

leprae infection based on the clinical and histological features and skin smear acid-fast staining.{Table 1}

Rapid Identification of Mycobacterium Leprae by Polymerase Chain Reaction-restriction Fragment Length Polymorphism Analysis of the Heat Shock Protein 65 Gene from Skin Specimens

In this nonrandom sample of 26 TB outbreaks in the United States during 2002-2011, we found that characteristics common among TB cases that started outbreaks included pulmonary TB smear-positive for acid-fast bacilli, patient substance abuse, and prolonged infectious periods.

Characteristics of tuberculosis cases that started outbreaks in the United States, 2002-2011

Disseminated histiocytic infiltration of either aggregates or sheets of epithelioid cells containing acid-fast bacilli, in the absence of caseous necrosis, were observed in different organs of the infected doves, especially lungs (23/23), intestines (9/23).

Avian Dis.: An outbreak of Mycobacterium genavense infection in a flock of captive diamond doves (Geopelia cuneata)

staining was performed on unfixed slide after heat fixing for acid-fast bacilli.

Utility of acid-fast staining and re-aspiration in tubercular lymphadenopathy--3 year study at tertiary centre