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)

Epididymis, EPIDIDYMIS - All seminiferous tubules form short straigh...

EPIDIDYMIS - All seminiferous tubules form short straight tubules as tubuli recti, open into wider network of rete testis. From rete testis 15-20 fine convoluted tubules,

Regulation of cholesterol biosynthesis, Cholesterol can be gained either fr...

Cholesterol can be gained either from the diet or it can be synthesized de novo, mainly in the liver. Cholesterol is transported round the body in lipoprotein particles. The rate

Pulmonary artery diastolic pressure, PADP may be determined by measuring th...

PADP may be determined by measuring the end diastolic velocity of PADP = 4 V 2 Pulmonary regurgitant signal and applying the following formula V is  the end diastolic veloci

Explain false left ventricular aneurysm, Explain False Left Ventricular Ane...

Explain False Left Ventricular Aneurysm? False Left Ventricular Aneurysm :  False aneurysm develops after acute rupture of an infarct. It is usually fatal, but a few survive

Glucose is a good source of energy for bacteria, Why is glucose such a good...

Why is glucose such a good source of energy for bacteria? 1) Glucose contains six oxygen atoms, which can be used for oxidative phosphorylation and the generation of many ATP molec

Of which type of tissue is the heart made, Of which type of tissue is the h...

Of which type of tissue is the heart made? How is this tissue oxygenated and nutrified? The heart is made of striated cardiac muscle tissue. The heart muscle is known as the my

The difference between high and low c, How does brain recognize difference ...

How does brain recognize difference between high and low c and soft and loud sounds?

What are autotrophic beings, What are autotrophic beings? What are heterotr...

What are autotrophic beings? What are heterotrophic beings? Autotrophic beings are those that can make their own food, i.e., that make organic material from inorganic compounds

Meiosis, What problem would most likely to occur if a haploid cell attempte...

What problem would most likely to occur if a haploid cell attempted to perform meiosis?

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