Which of the following bacteria is acid-fast bacteria?

The acid fast bacterial cell envelope is a specialized derivation of the Gram-positive cell envelope that has an extremely high lipid content. Acid-fast bacteria include the Mycobacteria and some of the Nocardia.

Which of the following is acid-fast bacteria?

Common acid-fast bacteria of medical importance include Mycobacterium tuberculosis, Mycobacterium leprae,Mycobacterium avium-intracellulare complex, and Nocardia species.

What is acid-fast bacteria give example?

Two examples of acid fast bacteria are Mycobacterium tuberculosis and Mycobacterium leprae. Mycobacterium tuberculosis causes the respiratory disease tuberculosis and Mycobacterium leprae causes the disfiguring disease leprosy.

Are Mycobacterium the only acid-fast bacteria?

Acid-Fast Staining

The term acid-fast bacilli is practically synonymous with mycobacteria, although Nocardia and some other organisms are variably acid fast. In the Ziehl-Neelsen stain, a fixed smear covered with carbol-fuchsin is heated, rinsed, decolorized with acid-alcohol, and counterstained with methylene blue.

Is Staphylococcus acid-fast?

The darker staining cocci are Staphylococcus epidermidis , a non-acid fast bacterium.

Gram+ve, Gram-Ve and acid fast bacteria (Classification on the basis of staining)

Is Staphylococcus aureus acid-fast?

Acid-fast rods and non-acid-fast cocci

(acid-fast rods) and Staphylococcus aureus (non-acid-fast cocci).

Are Bacillus acid-fast?

Acid-fast bacteria, also known as acid-fast bacilli or simply AFB, are a group of bacteria sharing the characteristic of acid fastness. Acid fastness is a physical property that gives a bacterium the ability to resist decolorization by acids during staining procedures.

Is Salmonella an acid-fast?

Examples of non-acid fast bacteria include Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Bacillus subtilis, and Staphylococcus aureus.

Is Mycoplasma acid-fast?

This organism is however, the most common cause of atypical pneumonia. Symptoms include a persistant cough, little to no sputum production, infiltrates on chest radiographs, and little toxicity (walking pneumonia). The organism does not produce a cell wall and is not stainable by gram stain or by acid-fast stain.

Is Corynebacterium acid-fast?

Etiology. Corynebacterium spp., members of the family Corynebacteriaceae, are Gram-positive, non-spore- forming, non-motile, aerobic, pleomorphic rods with coccoid or club-shaped appearance that are catalase-positive and non-acid-fast (Boone et al., 2001; Greenwood, 2007).

Is Bacillus subtilis acid-fast?

Therefore, it was noted that B. subtilis was acid-fast negative, whereas M. smegmatis was acid-fast positive. The acid-fast stain is classified under differential staining procedures that are used to pick out acid-fast organisms, including bacteria of the genus Mycobacterium.

Why mycobacteria are acid-fast?

Mycobacteria are acid-fast because of lipid-rich cell envelope. Their genome is large, rich in GC content, and consists of a closed circle Inderlied (1999).

Is Mycobacterium tuberculosis acid-fast?

Sputum, or phlegm, is often used to test for Mycobacterium tuberculosis, to find out if a patient has TB. This bacterium is completely acid-fast, which means the entire cell holds onto the dye.

Which bacteria was acid-fast quizlet?

Is mycoplasma a Mycobacteria?

The key difference between mycoplasma and mycobacterium is the presence of a cell wall. Mycobacterium is a genus of bacteria where all species possess a thick, protective and waxy cell wall. Mycoplasma is another unique bacterial genus in which all species do not contain a cell wall around their cell membrane.

Is Streptococcus pyogenes acid-fast?

Nonmotile, acid-fast, non-sporing, Gram-positive rod.

Is P aeruginosa acid-fast?

Sputum sample and pleural fluid grew P. aeruginosa and were negative for acid-fast bacilli. P. aeruginosa is a rare cause of cavitating lung lesion and has been associated with immunocompromised hosts.

Which of the following organism is acid-fast Mcq?

Answer: (a) M. tuberculosis is an acid-fast bacteria.

Why is bacilli called acid-fast?

Mycobacteria are called acid-fast bacilli because they are rod-shaped bacteria (bacilli) that can be seen under the microscope following a staining procedure in which the bacteria retain the color of the stain after an acid wash (acid-fast).

Is Bacillus cereus acid-fast?

Bacillus cereus is a Gram positive bacteria but does not stain well with an acid fast since they do not have mycolic acid in their cell walls. They result in long blue rods in acid fast staining because they do not have the unique waxy material in their cell walls like the Gram positive Mycobacterium and Nocardia.

Is Mycobacterium Phlei acid-fast?

Mycobacterium phlei is a species of acid-fast bacteria in the genus Mycobacterium. It is characterized as one of the fast-growing mycobacteria.

Which parasite is acid-fast?

Acid fast Intestinal parasites - Parasitology isospora cyclospora - sarcocystis - microsporidium - cryptosporidium - balantidiumt.

Is Micrococcus luteus acid-fast?

A photomicrograph of Mycobacterium smegmatis (pink) and Micrococcus luteus (blue) at 1000x magnification. M. smegmatis is acid-fast, retaining the carbol fuchsin dye, thus appearing pink.

Why is Nocardia and Mycobacterium acid fast but Corynebacterium is not?

The chain length of these mycolic acids is longest in mycobacteria, intermediate in nocardia and shortest in corynebacteria. This explains why mycobacteria are generally acid fast; nocardia less acid fast; and corynebacteria are non-acid fast.