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)

Secondary prevention- preventive strategies for food allergy, Define Second...

Define Secondary prevention- preventive strategies for food allergy? Secondary Prevention: Attempts to inhibit expression of the disease despite sensitization. These are used f

How drugs increase food intake, How Drugs Increase Food Intake? You mus...

How Drugs Increase Food Intake? You must understand that drugs may also increase food intake. This is because they can: Stimulate appetite : This is a common side effect

Why physiological cause of the syndrome called as cretinism, Q. What is the...

Q. What is the physiological cause of the syndrome Called as cretinism? Cretinism is caused by chronic deficiency of the thyroid hormones (T4and T3) during childhood. The chron

Explain root pressure, Explain root pressure? How can you demonstrate it ex...

Explain root pressure? How can you demonstrate it experimentally? What is the cytological basis of Down's syndrome? Give two physical symptoms of this disorder. Describe why the

Angiographic findings and interpretation, Q. Angiographic Findings and Inte...

Q. Angiographic Findings and Interpretation? Pulmonary angiography is useful in the following clinical scenarios: 1) Pulmonary artery stenosis 2) Pulmonary arteriovenous

Controlling expression of a number of genes in e, he Lac Repressor protein,...

he Lac Repressor protein, which we will talk about a bit later in the course, is important for controlling expression of a number of genes in E. coli. There are about 10 copies of

Explain the nutritional and functional role of magnesium, Minerals :- Magne...

Minerals :- Magnesium    Food Source      Whole grains, nuts, legumes, green leafy vegetables Nutritional Functional role Essential nutrient: Deficiency is rare Co

Agro industrial-packaging, Packaging Compound feeds, whether in mash o...

Packaging Compound feeds, whether in mash or pellet form, are packed in bags or stored in bins. Bags may be filled directly from mixers, pellet coolers or holding bins and wei

What is transgenic food, What is transgenic food? Transgenic beings are...

What is transgenic food? Transgenic beings are animals, microorganisms and plants that have recombinant DNA, i.e., genes from other plants, microorganisms or animals artificial

Microorganisms, advantages and disadvantages of protozoa

advantages and disadvantages of protozoa

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