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)

What are plant root hairs, What are plant root hairs? Where can they found ...

What are plant root hairs? Where can they found and what is their function? The Root hairs that are external elongated projections of the root epidermis and their role is to in

Define factors that affecting the calcium absorption, Define Factors that A...

Define Factors that Affecting the Calcium Absorption? It is a well known fact that the amount of calcium that we eat need not be the amount of calcium that gets absorbed. The d

Change in symptoms of aortic stenosis, Q. Change in symptoms of aortic sten...

Q. Change in symptoms of aortic stenosis? Asymptomatic severe aortic stenosis patient needs to be followed once in a year or even more frequently. Patients with moderate aortic

Describe prematurity in coronaw artery disease, Describe Prematurity in cor...

Describe Prematurity in coronaw artery disease ? CAD in Indians tends to be more aggressive and manifests at a younger age. Generally CAD occurring before the age of 55 years i

Monounsaturated fatty acids required for dyslipidemia, Q. Monounsaturated f...

Q. Monounsaturated fatty acids required for dyslipidemia? Polyunsaturated fatty acids also have a cholesterol decreasing effect. Omega 3 fatty acids are excellent for the heart

Excretory system - urinary bladder, URINARY BLADDER - Pear shaped sac l...

URINARY BLADDER - Pear shaped sac like. Situated in pelvic region of abdominal cavity. Ventrally placed. Lined by transitional epithelum. Detrusor muscle i.e. to expell out

Measures to control malaria infection, Measures to control malaria infectio...

Measures to control malaria infection: Malaria is a communicable disease caused by the female anopheles mosquito. a) Controlling mosquito population : Mosquito population can b

Define intracellular fluid or the water within the cells, Define intracellu...

Define intracellular Fluid or the water within the cells? The intracellular Fluid or the water within the cells makes up about 40-4596 of the total body weight. Because the bod

Explain non-surgical endodontic retreatment - missed canal, Explain Non-sur...

Explain Non-surgical Endodontic Retreatment - Missed Canal Missed root canal as it hold pulp tissues and bacteria is major cause of endodontic failure. Mandibular molar

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