Viruses/Fungi 1 Flashcards
How does the immune response to an infectious disease interact with the metabolism?
competes with the host’s metabolism
3 possible outcomes of pathogen invasion
- Only contaminate body surface
- Colonization of organisms/subclinical infection
- Clinically apparent infection/infectious disease
If an infectious agent only contaminates the body’s surface, it is destroyed by
the innate immune system
communicative disease
any disease where the causative agent can be passed directly or indirectly
incubation period
time from invasion to s/s
latent period
replicated but dormant
period of communicability
after latency, symptoms of transmission can occur
classification of viruses
DNA or RNA
Why does a virus need to take over a host cell?
Doesn’t have cellular components for reproduction
Overview of viral replication
- Virus invades host cell
- Takes control of metabolic function
- Uses cell’s synthesizing mechanisms to crank out new viruses
Steps of viral replication
- adsorption
- penetration and uncoating
- biosynthesis
- maturation and release
viral adsorption
virus attaches to host cell wall
viral penetration and uncoating
- enters or fuses with cell wall
- releases genetic material
- removes any remaining viral coating
viral biosynthesis
- takes control of cell’s synthesizing system
- DNA or RNA
viral maturation and release
- parts of virus are assembled into mature viruses
- released from host cell
- sometimes kill host cell
