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Flashcards in Viruses Introduction Deck (9)
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1

Give three possible shapes of viruses

Icosahedral
Helical
Complex

2

What are viruses classified by? (taxonomy)

Shape
Symmetry
Envelope presence/absence
Genome structure
Replication mechanism

3

Differentiate droplet and airborne transmission of viruses

Droplet - large particles that fall within a short distance of the source (low-risk)
Airborne - can travel further in the environment

4

Give 4 possibilities resulting from a viral infection

Clearance with short/long/no immunity
Chronic infection
Transformation (long-term; altered gene expression)
Latent infection

5

How can viral infection give rise to cancer?

Cell cycle control is modulated
Apoptosis is affected
Can lead to uncontrollable cell proliferation
e.g. Hodgkin's lymphoma

6

What ways are viral infections detected?

Partial organism identification by PCR
Antibody/antigen presence indicating an immune response taking place

7

Name four different methods of viral infection therapy

Antiviral (all virustatic)
Prophylaxis
Pre-emptive treatment
Suppressive treatment

8

Give three methods of preventing viral infection

Immunisation via vaccination/immunoglobulins
Prophylactic treatment
Screening

9

Give three conditions which must be satisfied for a virus to possible be eradicated

No animal reservoir
Possible practical intervention
No chronic carrier state
e.g. smallpox/polio