What is an example of an acid-fast bacteria that is not pathogenic?

Acid-fast bacteria include the mycobacteria, of which there are more than 30 well-characterized members of the genus and many more unclassified Daniel (1992). Most mycobacteria are not pathogenic, and are readily isolated from the environment Daniel (1992).

What are examples of acid-fast bacteria?

Is E coli A acid-fast bacteria?

Therefore, these organisms are said to be “acid-fast”. Most bacteria, such as E. coli and Staphylococcus, lack this high mycolic acid content and are easily decolorized by the acid-alcohol. Therefore, these organisms are described as “non-acid-fast”.

Is Salmonella an acid-fast?

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

Is Staphylococcus acid-fast?

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

Acid-Fast Stain

Which of the following bacteria is acid-fast bacteria?

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

Is Streptococcus pyogenes acid-fast?

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

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 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.

Which bacteria was acid-fast quizlet?

Why Mycobacterium tuberculosis is acid-fast?

The acid-fastness of Mycobacteria is due to the high mycolic acid content of their cell walls, which is responsible for the staining pattern of poor absorption followed by high retention. Some bacteria may also be partially acid-fast, such as Nocardia.

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 Streptococcus pyogenes a pathogen?

Streptococcus pyogenes, also known as Group A Streptococcus (GAS), is a Gram-positive human-exclusive pathogen, responsible for more than 500 000 deaths annually worldwide. Upon infection, GAS commonly triggers mild symptoms such as pharyngitis, pyoderma and fever.

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.

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.

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 Streptococcus AA pathogenic or nonpathogenic?

The genus Streptococcus is comprised of a wide variety of both pathogenic and non-pathogenic (commensal) gram-positive bacteria which are found to inhabit a wide range of hosts, including humans, horses, pigs and cows.

What is pathogenic streptococcal infection?

Group A streptococci are extracellular bacterial pathogens which produce a variety of pyogenic infections involving the mucous membranes, tonsils, skin, and deeper tissues, including pharyngitis, impetigo/pyoderma, erysipelas, cellulitis, necrotizing fasciitis, toxic streptococcal syndrome, scarlet fever, septicemia, ...

What type of pathogen is strep throat?

Bacteria cause strep throat

However, strep throat is an infection in the throat and tonsils caused by bacteria called group A Streptococcus (group A strep).

Is B. cereus a pathogen?

Bacillus cereus is a foodborne pathogen that can produce toxins, causing two types of gastrointestinal illness: the emetic (vomiting) syndrome and the diarrhoeal syndrome. When the emetic toxin (cereulide) is produced in the food, vomiting occurs after ingestion of the contaminated food.

Is Enterobacter aerogenes acid-fast positive or negative?

Klebsiella aerogenes, previously known as Enterobacter aerogenes, is a Gram-negative, oxidase negative, catalase positive, citrate positive, indole negative, rod-shaped bacterium. The bacterium is approximately 1-3 microns in length, and is capable of motility via peritrichous flagella.

Which parasite is acid-fast?

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

What two historically important diseases are caused by acid-fast bacteria?

TUBERCULOSIS, LEPROSY AND OTHER DISEASES CAUSED BY ACID-FAST BACTERIA.

Why is Mycobacterium resistant to staining?

The cell wall of mycobacteria contains a higher content of complex lipids including long chain fatty acids called mycolic acids. Mycolic acids make the cell wall extremely hydrophobic and enhance resistance to staining with basic aniline dyes so mycobacteria are not visible with the Gram stain.