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What else can I help you with?
What is antigenic variation?
An antigenic variation is the mechanism by which an infectious organism changes its surface proteins in favour of circumventing a host immune response.
What is antigenic concealment?
When a parasite hides from the immune system of a host. e.g. in the liver cells
What is an antigenic variation?
Antigenic variation is a mechanism used by certain pathogens, such as viruses and bacteria, to change their surface antigens, making it difficult for the immune system to recognize and mount an effective response against them. This allows the pathogen to evade immune detection and establish persistent infections in the host.
Small molecules that bind with self-proteins to produce antigenic substances are called?
Small molecules that bind with self-proteins to produce antigenic substances are called happens. The unique area that a lymphocyte recognizes and binds to an antigenic determinant.
What does nonimmunogenic mean?
Since immunogenic means 'Capable of inducing an immune response; antigenic.' I would suggest that nonimmunogenic would mean that an immune response would not be induced.
The basic determinating feature of antigenic specificity is ...........?
The basic determining feature of antigenic specificity is the unique structure of antigenic epitopes, which are the specific regions on an antigen recognized by antibodies or T cell receptors. These epitopes interact with corresponding binding sites on antibodies or T cell receptors, leading to the immune response against the antigen.
What is an antigenic site?
For example in regards to influenza viruses, an antigenic site is the area on the protein spike protruding from their lipid bilayer that carries the receptor binding sites. This is supposed to trigger an immune response when your body detects these sites by binding antibodies to them.
What is the difference between antigenic and phase variation?
The Phase Variation is the reversible ability of some bacteria to turn an and off the expression of genes coding for the surface antigens . While the Antigenic Variation is the modification of the gene for an expressed surface antigen by genetic recombination with one of many variable unexpressed DNA sequences. In this manner , the expressed surface antigen can assume many different antigenic structures
What is CTL escape mutant?
These virus have changed their recognition sequence either via mutation or antigenic drift and are able to escape cytotoxic T lymphocytes of the immune response
A misdirected immune system responds against a harmless antigen is called?
An allergic reaction i believe.
Why will herd immunity be lacking if antigenic shift or drift occurs?
Herd immunity relies on a significant portion of the population being immune to a pathogen, which helps protect those who are not immune. Antigenic shift and drift lead to changes in the virus's surface proteins, enabling it to evade the immune response generated by prior infections or vaccinations. As a result, even if many individuals are vaccinated or previously infected, the emergence of new variants can diminish overall immunity in the population, preventing the establishment of herd immunity and allowing the virus to spread.
What is antigenic drift?
The genome of viruses can mutate over time through a variety of mechanisms. Some viruses are more prone to these mutations than others. When the genome changes, this changes the proteins that are expressed by the virus, included the proteins that are present on the surface of the virus. These proteins are the antigens that are recognised by the host immune system and which trigger the immune response. Antigenic drift is when the genome of the virus mutates thus changing the antigens expressed by the virus. This means that an individual immunized against a virus may not be protected if the virus undergoes antigenic drift as the proteins present of the surface of the virus are not the same as the virus against which the individual was immunized.
