(redirected from Acid fast bacilli)
Also found in: Thesaurus, Medical.


Not decolorized by acid after staining, as bacteria that retain dye after an acid rinse.

ac′id-fast′ness n.


(Microbiology) (of bacteria and tissues) resistant to decolorization by mineral acids after staining


resistant to decolorizing by acidified alcohol after staining.
ac′id-fast`ness, n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.acid-fast - not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis)
imperviable, impervious - not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument"
Mentioned in ?
References in periodicals archive ?
Microscopy revealed acid fast bacilli 04/100 fields.
Tenders are invited for Lab Test A8s0lute Eosinophil Count(Manual), Absolute Neutrophil Count(Manual), Acid Fast Bacilli (Afb) Gastric Aspirate(Manual), Afb -Pleural Fluid(Manual), Afb Stool Parasites(Manual) Investigation District Hospital Kanhangad
The purpose of this study was to detect and confirm the presence of acid fast bacilli in lymph node biopsies using routine Ziehl Neelsen stain, Kinyoun stain and fluorescence staining and also to determine the best, rapid and more cost effective technique of staining for the detection of acid fast bacilli.
Fine needle aspiration cytology (FNAC) from these swellings revealed features of an acute suppurative lesion and was Fite stain positive for acid fast bacilli (AFB).
Mycobacterium tuberculosis (MTB) complex, an acid fast bacilli (AFB), is the causative agent of TB.
Abstract Background: Sputum smear testing for acid fast bacilli is the gold standard for the diagnosis of tuberculosis.
In pulmonary tuberculosis, there is option for sputum examination for acid fast bacilli and mycobacterial culture but, in the extra-pulmonary cases, like lymphnode tuberculosis, microbiological proof is difficult to obtain.
However, even if the correct sample is expectorated, the bacillary population has to be at least 10000 per millilitre, to get the smear positive for acid fast bacilli (AFB).
The acid fast bacilli were seen as bright/ rose red rods with a blue background under oil immersion lens.
Acid fast bacillus (AFB) smear test The smears of sputum, peritoneal and pleural fluids and content of lymph nodes were fixed, dried in the air, heat fixed and stained with Ziehl-Neelsen stain (ZN stain) and studied under the microscope to detect acid fast bacilli (Watt et al.