Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
Q. What is the relation between the hypophysis and the thyroid? The hypophysis secretes TSH (thyroid- stimulating hormone). This hormone hastens the secretion of thyroid hormon
What benefits led to natural selection of a two-circuit pump function of the heart a) One circuit to go from the heart to the body and one from the heart to the lungs b) One cir
Q. Investigation of aortic regurgitation by Serial Testing? Serial testing is indicated in asymptomatic patients with severe AR and preserved LV function since LV dysfunction m
Define Limitations for Standard or Total Plate Counts Method? This method has certain limitations - 1. Microbial count depends on the type of media, incubation temperature,
What is the morphological characteristic that evolutionarily approximates the beings of the phylum Annelida to arthropods? The metameric feature, i.e., the body segmentation in
Why is cannibalism an inharmonious intraspecific ecological interaction? In cannibalism an individual eats other of the same species (occurs in some insects and arachnids). Sin
Using the words 'cilia' and 'mucus', describe, very briefly, how the body gets rid of dust which enters the lungs. The lining of the air passages makes mucus which traps dust p
study of phenomena of apical dominance
What do all organic compounds contain? The key element is carbon. Organic compounds are all carbon-having compounds. By definition, an organic compound having carbon. Alt
Q. How do antibody-based tests detect how HIV infection works? Subsequent to the infection by the HIV the immune system begins the production of antibodies (primary immune resp
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd