Viruses/Fungi 1 Flashcards Preview

8501 Clin Med > Viruses/Fungi 1 > Flashcards

Flashcards in Viruses/Fungi 1 Deck (19)
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1

How does the immune response to an infectious disease interact with the metabolism?

competes with the host's metabolism

2

3 possible outcomes of pathogen invasion

1. Only contaminate body surface
2. Colonization of organisms/subclinical infection
3. Clinically apparent infection/infectious disease

3

If an infectious agent only contaminates the body's surface, it is destroyed by

the innate immune system

4

communicative disease

any disease where the causative agent can be passed directly or indirectly

5

incubation period

time from invasion to s/s

6

latent period

replicated but dormant

7

period of communicability

after latency, symptoms of transmission can occur

8

classification of viruses

DNA or RNA

9

Why does a virus need to take over a host cell?

Doesn't have cellular components for reproduction

10

Overview of viral replication

1. Virus invades host cell
2. Takes control of metabolic function
3. Uses cell’s synthesizing mechanisms to crank out new viruses

11

Steps of viral replication

1. adsorption
2. penetration and uncoating
3. biosynthesis
4. maturation and release

12

viral adsorption

virus attaches to host cell wall

13

viral penetration and uncoating

- enters or fuses with cell wall
- releases genetic material
- removes any remaining viral coating

14

viral biosynthesis

- takes control of cell's synthesizing system
- DNA or RNA

15

viral maturation and release

- parts of virus are assembled into mature viruses
- released from host cell
- sometimes kill host cell

16

If a host cell is not killed after viral maturation, it remains

infected

17

3 most common dangers to healthcare workers

- Hep B (HBV)
- Hep C (HCV)
- HIV

18

Greatest risk of bloodborne viral pathogens occurs when:

- invasive procedures
- digital palpation of sharps

19

How are bloodborne viral pathogens preventable?

- use safety devices
- Techniques to reduce handling of sharp instruments

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