The acid-fast stain is a differential stain used to identify acid-fast organisms such as members of the genus Mycobacterium . Acid-fast organisms are characterized by wax-like, nearly impermeable cell walls; they contain mycolic acid and large amounts of fatty acids, waxes, and complex lipids.

In respect to this, what does an acid-fast stain look like?

Acid fast bacteria have a high content of mycolic acids in their cell walls. Acid fast bacteria will be red, while nonacid fast bacteria will stain blue/green with the counterstain with the Kinyoun stain.Acid fast bacteria have a high content of mycolic acids in their cell walls. Acid fast bacteria will be red, while nonacid fast bacteria will stain blue/green with the counterstain with the Kinyoun stain.

Additionally, what is the primary stain in the acid-fast stain quizlet? Carbolfuchsin is the primary stain. Carbolfuchsin is a lipid-soluble dye that can penetrate the waxy cell walls of acid-fast bacteria. This red dye is used as the primary stain in the acid-fast procedure.

Also, what is acid fast staining quizlet?

Acid-Fast Stain - Purpose. - differential stain used to detect cells capable of retaining a primary stain when treated with an acid alcohol. - used to identify bacteria in the genus Mycobacterium and Nocardia (really pathogenic) - contain large amounts of Mycolic Acid within their cell walls (fatty waxes)Acid-Fast Stain - Purpose. - differential stain used to detect cells capable of retaining a primary stain when treated with an acid alcohol. - used to identify bacteria in the genus Mycobacterium and Nocardia (really pathogenic) - contain large amounts of Mycolic Acid within their cell walls (fatty waxes)

What are the two types of acid-fast staining?

There are two types of acid fast staining: hot method and cold method. Ziehl-Neelsen is a hot method of acid fast staining. The components of Ziehl-Neelsen stain include primary stain (strong/concentrated carbol fuchsin), decolourizer (20% H2SO4) and counterstain (Loeffler's methylene blue).

Related Question Answers

Why it is called acid-fast staining?

Acidfast Stain: Background and Introduction. Mycobacterium and many Nocardia species are called acid-fast because during an acid-fast staining procedure they retain the primary dye carbol fuchsin despite decolorization with the powerful solvent acid-alcohol. Nearly all other genera of bacteria are nonacid-fast.

What diseases are diagnosed using acid fast staining?

An acid-fast bacteria (AFB) culture is done to find out if you have tuberculosis (TB) or another mycobacterial infection. Besides TB, the other main mycobacterial infections are leprosy and a TB-like disease that affects people with HIV/AIDS.

What is the primary stain in acid-fast?

The primary stain used in acid-fast staining, carbolfuchsin, is lipid-soluble and contains phenol, which helps the stain penetrate the cell wall. This is further assisted by the addition of heat.

What is the purpose of acid alcohol in acid fast staining?

Acid alcohol has the ability to completely decolorize all non-acid-fast organisms, thus only leaving behind red-colored acid-fast organisms, like M. Tuberculosis. The slides are then stained a second time with methylene blue that serves as a counterstain.

Why acid-fast bacteria Cannot be Gram stained?

Mycobacteria are "Acid Fast"

They cannot be stained by the Gram stain because of their high lipid content. 2. Acid fast staining is used to stain mycobacteria. Bacteria are treated with a red dye (fuchsin) and steamed.

What are the different stains used in acid fast staining quizlet?

Terms in this set (11)

• Acid Fast Stain. *A differential stain which distinguishes bacteria based on cell wall properties.
• mycolic acid. a waxy substance in cell walls of acid fast bacteria.
• primary stain. carbol fuchsin (reddish-pink)
• decolorizer. acid alcohol.
• acid alcohol.
• counter stain.
• methylene blue.
• acid- fast procedure.

What is the purpose of a Decolorizer in the acid fast stain?

Steam helps to loosen up the waxy layer and promotes entry of the primary stain inside the cell. The smear is then rinsed with a very strong decolorizer, which strips the stain from all non-acid-fast cells but does not permeate the cell wall of acid-fast organisms.

What step is most critical in the acid fast stain?

decolorizer step

What is the purpose of the acid fast stain quizlet?

What is the purpose of an Acid-Fast stain? It is a differential stain used to detect cells capable of retaining a primary stain when treated with an acid alcohol.

What is the role of acid alcohol in the acid fast staining technique quizlet?

Acid-alcohol is the decolorizing agent in the acid-fast staining procedure. Acid-alcohol removes carbolfuchsin from non-acid-fast cells. While performing the acid-fast stain procedure, you add methylene blue to your smear for the appropriate amount of time and then rinse with water.

Which bacterium was acid fast?

The genus Mycobacterium and the genus Nocardia are among the few bacteria possessing an acid-fast cell wall.

What is the purpose of carbol Fuchsin in the acid fast staining technique?

Carbol fuchsin is used as the primary stain dye to detect acid-fast bacteria because it is more soluble in the cells wall lipids than in the acid alcohol.

Which bacteria was acid fast positive quizlet?

Bacteria which are acid-fast are gram positive microorganism that are resistant to the gram stain, therefore implementing the acid-fast allow us to visualize this bacteria. what are mycolic acid components? Arabinogalactan and lipoarabinomannan.

Why some bacteria are called acid fast quizlet?

Why is it that acid fast positive bacteria resist alcohol? Because their cell walls contain mycolic acid. It is a thick and waxy cell wall that makes the organism sticky.

What is the name of secondary stain in acid fast staining?

What is the secondary stain in the acid fast stain? The secondary stain in the acid-fast stain is methylene blue.

What is the difference between Gram staining and acid fast staining?

The main difference between Gram stain and acid fast stain is that Gram stain helps to distinguish bacteria with different types of cell walls whereas acid-fast stain helps to distinguish Gram- positive bacteria with waxy mycolic acids in their cell walls.

Which is the difference between Gram and acid-fast stains?

Posted Jun 01, 2020. Acid-fast bacteria are gram-positive in terms of structure because they contain peptidoglycan in the cell wall. However, they stain poorly with Gram stain procedure, appearing weakly Gram-positive.

What is the primary stain in the kinyoun acid fast stain?

The primary stain for the Kinyoun procedure is the aniline dye, basic fuchsin, that stains all the cells present red. The unique ability of mycobacteria to resist decolorization by acid-alcohol is why they are termed acid-fast, and will keep their red coloration throughout the staining process.

What is stained by the counterstain in the acid fast stain procedure?

What is the function of the counterstain in the acid-fast staining procedure? The counterstain stains non-acid-fast bacteria blue if using Methylene Blue or green if using Brilliant Green. You just studied 7 terms!

Which stain is the primary stain for the Gram stain and which one is the primary stain for the acid fast stain?

carbolfuchsin

Which is the difference between Gram and acid-fast stains quizlet?

The main difference between Gram stain and acid fast stain is that Gram stain helps to distinguish bacteria with different types of cell walls whereas acid-fast stain helps to distinguish Gram-positive bacteria with waxy mycolic acids in their cell walls.

What is the procedure for acid-fast staining?

Procedure of Acid-Fast Stain

1. Prepare bacterial smear on clean and grease free slide, using sterile technique.
2. Allow smear to air dry and then heat fix.
3. Cover the smear with carbol fuchsin stain.
4. Heat the stain until vapour just begins to rise (i.e. about 60 C).
5. Wash off the stain with clean water.