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)

Heart, What is the immediate effects of exercise on the functions of the he...

What is the immediate effects of exercise on the functions of the heart?

Succession, why succession more likely to occur on valley floor than steep ...

why succession more likely to occur on valley floor than steep slopes

Explain precautions for morphological study of fungi, Explain Precautions f...

Explain Precautions for Morphological Study of Fungi? 1. Use sterile forcep and needles for slide culture technique. 2. Aseptic conditions should be maintained.  3. Caref

Explain nutrition monitoring and evaluation, Nutrition Monitoring and Evalu...

Nutrition Monitoring and Evaluation Monitoring and evaluation is an essential step in the nutritional care process and  is very important too. Monitoring specifically refers to

State the term - functional neuroanatomy, State the term - Functional neuro...

State the term - Functional neuroanatomy Functional neuroanatomy focuses on the study of anatomy using psychological measures. One application of this kind of research is to he

Explain the general small size of arthropods, How does the presence of exos...

How does the presence of exoskeleton explain the general small size of arthropods? As they have exoskeleton and periodic ecdysis, the growth of arthropods is limited to avoid t

Social determinants of health - food, Social Determinants of Health - Food ...

Social Determinants of Health - Food The twin paradox of food i.e., research showing excessive intake can lead to a variety of diseases whilst at the same time food poverty be

Sex, how to do sex ?

how to do sex ?

Difference between spermatid and spermatocyte ii, Q. What is the difference...

Q. What is the difference between spermatid and spermatocyte II? The spermatids (n) are the products of the second division of meiosis (meiosis II) in the male gametogenesis an

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