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influenza A viruses can trade genetic materials with the viruses of other species. Two different strains trade or merge material, a process known as an antigenic shift.
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Is swine flu H1N1 an antigenic shift or drift?
antigenic shift
What is antigenic shift?
influenza A viruses can trade genetic materials with the viruses of other species. Two different strains trade or merge material, a process known as an antigenic shift.
What contributes to antigenic shift in influenza viruses?
a segmented genome
Does the influenza virus readily change the expressions of its genetic material?
RNA genome of influenza virus is segmented in to 7 pieces. It has the unique property of undergoing two types of genetic variation ie antigenic drift and antigenic shift. In antigenic drift the antigenic variations are minor where genetic recombination take place between strains of two similar species whereas in antigenic shift the recombination take place between strains of dissimilar species leading to major antigenic variations and hence seasonal epidemics.
What are difference between antigen drift and antigenic shift?
Both are mutation occurs in virus (usually influenza). But the difference is: antigenic drift are mutation occurs in viral DNA/RNA that cause a person to be re-infected by the virus. while antigenic shift are mutation occurs in viral characteristic, which cause transition from being able to infect poultry ONLY (not human), --> able to infect BOTH poultry and human.
Antigenic determinants is the site of an antobody?
Words " Antigenic Determinant " itself yells that it is on antigen
How were flu pandemics created?
antigenic shift. That shift produces a new subtype that is different from the two parent viruses. When the new subtype contains genes from the human virus,a pandemic resulted because there was no immunity to the virus and no vaccine to protect against it.
Can monoclonal antibodies be specific for multiple antigenic determinants?
No, they are pure antibody preparations specific for a single antigenic determinant.
What are haptens?
antigenic when bound to proteins
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 an 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 are antigens with only one antigenic site called?
Antigens with only one antigenic site are called Major histocompatibility complex (MHC)
