Antigenic processing

Related BrainMass Solutions

• Comparing Internal and External Antigen Presentation Pathways

  Peptides from the antigen displace CLIP and now these antigenic peptides occupy the peptide-binding groove on the MHC class II molecule.

• antigenic drift / antigenic shift

  Both antigenic drift and antigenic shift are important for influenza virus, although in terms of the number of cases, it could be argued antigenic shift results in more infections during pandemic years.

• Antigenic variation

  69526 What is antigenic variation and why is it significant? A look at how various pathogens emply antigenic variation to evade the adaptive immune response, including specific examples (such as the 'flu).

• Antigenic mimicry

  The expert describes antigenic mimicry and how some pathogens use this mechanism to avoid the immune system.

• Flu and Immunization

  Influenza vaccine administered may not have a good antigenic fit with the virus that has caused the infection post-vaccine.

• How do pathogens evade the immune system?

  Such mechanisms include antigenic variation (where a pathogen changes its antigens so that an effective adaptive response does not occur), antigenic mimicry (where a pathogen expresses antigens similar to host proteins, so that the pathogen is not recognized

• Superantigens

  Some pathogens such as Staphlococcus aerues and S. pyrogenes, produce superantigens that bind to T cell receptors and MHC classII irrespective of their antigenic affinity.

• Need help answering questions below

  c) binding of T cell to a site on the antigen d) interleukin-1 activating the T helper cell e) all of the choices are correct Antitoxins: a) contain modified bacterial exotoxin molecules b) are always genetically engineered c) contain select antigenic

• Enzymes expressed by bacteria that serve as virulence factors

  The antigenic components of the cell are the virulence factors. The extracellular components responsible for the disease process include invasins and exotoxins.