Assignment Help - homework help

  Characteristics of Streptococcus pyogenes

Characteristics of Streptococcus pyogenes:

1324_Streptococcus pyogenes.jpg


                                                                   Figure: Streptococcus pyogenes


Pathogenic attributes:

Streptococcus pyogenes states large numbers of virulent factors and induces differing clinical conditions. Such virulence factors aid the organisms to adhere to tissues, avoid host defenses and cause tissue harm. All virulence factors might not be stated by all strains all the times. Therefore there is variation seen in the clinical picture. The schematic diagram below shows the location of different virulence related products of Str. pyogenes.

779_Streptococcus pyogenes2.jpg


                                                              Figure: Streptococcus pyogenes

Adhesion:

Host cells consist of a matrix protein termed as fibronectin. Str.pyogenes possesses a protein termed as F protein. There is interaction between host cell fibronectin and streptococcal F protein. It leads to initial binding and later internalization of streptococci in the host cell.

M proteins:

The M protein is anchored in the cytoplasmic membrane. This comes out via the cell wall and protrudes from the cell surface as fibrils. It aids the organisms to adhere on to the host cells and resist phagocytosis. Antibodies to M proteins provide acquired resistance to streptococci possessing that particular M protein. Though, there are numerous different types of M protein variants. More than 80 diverse M proteins have been recognized. Therefore a person might suffer from recurrent Streptococcus pyogenes infection with strains stating various versions of M-protein.

M like protein:
M like protein is structurally associated to M protein. It has antiphagocytic action. It can bind different serum proteins that comprise fibrinogen, albumin, plasminogen, IgG, IgA α2 macroglobulin, factor H of complement system. Since these bacteria are coated with host proteins, they camouflage themselves and avoid host defenses.

Capsule:

Certain strains of Str. pyogenes generate capsule. This capsule is made up of hyaluronic acid. Capsule generating strains are extremely virulent. Capsule contains anti-phagocytic activity. Since the capsule is similar with the hyaluronic acid of connective tissue of the host, the bacteria disguise themselves and evade immune attack.

 

Latest technology based Biology Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Streptococcus Pyogenes help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Streptococcus Pyogenes, project ideas and tutorials. We provide email based Streptococcus Pyogenes help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Streptococcus Pyogenes. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Microbiology Homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Streptococcus Pyogenes. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Home | Company Overview | Services | Discover Q&A | Sitemap | Contact Us | T & C | Refund Policy | Copyright Policy | Blog | Q&A | Directory

©TutorsGlobe All rights reserved 2022-2023.