Changes in Viral Genome
This is a slow change in a viral protein that occurs by the accumulation of point mutations.
What is antigenic drift?
Examples of this type include the common cold and influenza A. The host gets infected, sick, recovers, and then no virus remains.
What is acute infection?
This is the exchange of DNA between similar viruses to create a new virus.`
What is recombination?
This genetic event happens when a virus with a mutated or inactivated gene(s) recombines DNA with a similar virus, reconstituting the inactivated gene and generating a virus with a different phenotype
What is marker rescue?
This is possible anytime two viruses with segmented genomes infect the same cell. During packaging of viral nucleic acids different genomic segments are incorporated into virions
What is reassortment?
This genetic mechanism allows replication of defective virus and occurs during a mixed infection also called a superinfection.
What is complementation?