acid-fast stain


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Related to acid-fast stain: Acid fast bacilli

acid-fast stain

[′as·əd ‚fast ′stān]
(microbiology)
A differential stain used in identifying species of Mycobacterium and one species of Nocardia.
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A Fite acid-fast stain was also negative for mycobacteria in the lung and liver granuloma samples, and the bacteria in the facial granuloma were not acid-fast.
With suspected TB meningitis, scanty acid-fast bacilli may be observed on microscopy, but acid-fast stains are often negative and TB culture should be performed (Table I).
Necropsies were performed on both animals on February 23, and revealed Cryptosporidium oocysts on an acid-fast stain of an intestine smear from one of the calves.
The gains were chosen empirically to maximize contrast of the red acid-fast stain without saturation while limiting the peak intensity of the green background staining to approximately half of the peak intensity of the red channel.
Sputum acid-fast stain and tuberculosis culture did not yield tuberculosis bacilli.
If clinical suspicion for TB is high, a negative acid-fast stain does not rule it out.
The two initial cases, reported in the June 28 issue of EPI Update, were diagnosed by a laboratorian at SHL who identified possible Cyclospora oocysts on microscopic examination of fresh stool and confirmed this diagnosis using a modified acid-fast stain technique.
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.
I did an acid-fast stain on them when I got back and found Cyclospora cayetanensis
14%) had been submitted to acid-fast stain and L-J culture tests.