Viruses Flashcards
What is the protein layer in a virus called?
Capsid
What is the host range?
The type of cell or organism a virus is able to infect.
What are virions?
Inert viral particles outside of a host cells.
What are the two basic shapes capsids come in?
Helical and Icosahedral.
What does a helical capsid look like?
Rod or thread-like.
What does icosahedral capsid look like?
20 equilateral triangular sides.
What are the 2 classifications of viral infections?
Acute and Persistent.
In acute infections how fast do the viruses replicate?
Rapidly.
How detectable can viruses be in persistent infections?
They can be detected for a long time usually years.
What are the 3 types of persistent infections?
- Chronic
- Latent
- Slow
What is antigenic drift?
Accumulation of mutations in HA and NA genes which code for surface proteins (antigens) which are recognized by our immune system.
Influenza viruses are what type of infection?
Acute
HIV infections are what type of persistent infection?
Chronic
What are anti-retro viral drugs?
Drugs that target different aspects of viral replication.
8 different herpes viruses all cause what type of persistent infection?
Latent infections