Define capsule staining (anthony staining method), Biology

Assignment Help:

Define Capsule Staining (Anthony Staining Method)?

A rigid, well-organized gelatinous layer called capsule is present outside the cell wall of many bacteria e.g. Streptococus pneumoniae, Clostridium perfringens and Klebsiella pneumoniae. It is mostly made up of polysaccharide (homo or hetero-polysaccharide) though in few it is proteinaceous in nature, e.g., in Bacillus anthracis it consists of poly-D-glutamic acid. The ability to form capsule is genetically determined. Capsule is not required for reproduction or growth of bacteria though it confers several advantages:

1. It protects the bacteria from phagocytosis by host phagocytes, so it contributes to the virulence of bacteria, e.g. Streptococcus pneumoniae.

2. It provides protection against dessication.

3. It helps the bacteria in attachment to host tissues e.g. in Streptococcus mutans capsule helps in attachment to the surface of the teeth and thus causing dental caries.

4. Capsule may be used as a source of nutrition by S. mutans.

5. Viscosity of a capsule may help in inhibiting the movement of nutrients out of the cell.

6. Capsule also exclude bacterial viruses and most hydrophobic toxic materials such as detergents.


Related Discussions:- Define capsule staining (anthony staining method)

Lipids - digestion process, Lipids are essential fats that have much import...

Lipids are essential fats that have much importance to the human body. Lipids are biological molecules that are insoluble in aqueous solutions and soluble in organic solvents are c

Anatomy and physiology , describe how ulcers can lead to distention and ir...

describe how ulcers can lead to distention and irritation followed by vomiting?

Explain the chemotherapeautic rinses, Explain the Chemotherapeautic rinses ...

Explain the Chemotherapeautic rinses Chemotherapeautic rinses:  The use of  0.12  per cent chlorhexidine has been proven to be of therapeutic significance in maintaining period

What are the main complications of diabetes mellitus, Why do diabetic patie...

Why do diabetic patients often undergo dietary sugar restriction? What are the main complications of diabetes mellitus? Diabetic patients are often advised to ingest fewer carb

Define use of isotopically labelled nutrients, Define Use of Isotopically L...

Define Use of Isotopically Labelled Nutrients? Nutrient Turnover Radioactive labelled nutrients are used to know the total body pool and the compartment in which it is stored.

Estimation of burn area, Estimation of Burn Area: The  estimation of  ...

Estimation of Burn Area: The  estimation of  the  extent  of  burn area expressed as  the  percentage  of  the surface  area  of  the skin  burnt to  the  total body  surface

Explain the biochemical approach in taxonomy, Explain the Biochemical Appro...

Explain the Biochemical Approach in Taxonomy Comparative biochemistry is being used increasingly in the systematic of animals, both for identification of organisms as well as f

Effect of air pollution, (i)    Effect on Human Health: Air pollution...

(i)    Effect on Human Health: Air pollution causes many respiratory problems in human being. (1)   Dust, soot and smog causes several respiratory troubles such as bronc

What phenotypic ratio would be expected among the offspring, The F2 phenoty...

The F2 phenotypic ratio from a dihybrid cross with epistasis was 9:3:4. If instead of a dihybrid cross, a double heterozygote was test crossed (crossed to a homozygous recessive in

Write short note on cholesterol, Cholesterol, from stereos (solid) and the...

Cholesterol, from stereos (solid) and the Greek chole- (bile) followed by the chemical suffix -ol for an alcohol is an organic chemical substance classified as a waxy steroid of fa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd