Acid-Fast Bacteria

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acid-fast bacteria

[′as·əd ¦fast bak′tir·ē·ə]
Bacteria, especially mycobacteria, that stain with basic dyes and fluorochromes and resist decoloration by acid solutions.

Acid-Fast Bacteria


species of bacteria whose cells are not decolorized by sulfuric acid when stained with carbolfuchsin, owing to the chemical composition of the bacterial cells. The optimal reaction of the culture medium for growing acid-fast bacteria is not acid but neutral. Among acid-fast bacteria are several species of Mycobacterium, including pathogenic ones causing leprosy and tuberculosis in both man and animals and some nitrogen-fixing bacteria found in the soil.

References in periodicals archive ?
blood cultures positive for 2/0 acid-fast bacteria, aerobic/anaerobic Time of collection of first 8/11 positive/last positive blood culture, d after readmission Outcome Resolved after antimicrobial drug treatment Characteristic Patient 2 Age, y/sex 2.
The bioactivity of lectin may appear to function as a pattern recognition protein specific for Gram-negative and acid-fast bacteria through its interaction with Lipopolysaccharide (LPS), and also as an opsonin to increase the efficiency of hemocyte phagocytosis.
That reflected the very low sensitivity of acid-fast bacteria stain in this setting, which is similar to that reported by other studies.
This method can be performed on any tissue demonstrating acid-fast bacteria and has been used on a wide variety of species including mammals, birds, (12) amphibians, and fish.
Biopsy specimens were negative for acid-fast bacteria and mycobacterial growth (again, different solid and liquid media, extended incubation periods).
Culture for common bacteria and fungi was negative, but culture of a sterile nodule aspirate on Lowenstein-Jensen medium was positive for acid-fast bacteria after 5 weeks.