DMH7- Viral pathogens

Question 1

Examples of pathogenic viruses and disease.

Human pathogens and livestock pathogen examples:

Answer 1

Human pathogens:
Covid-19: corona virus 
Influenza
Small pocks 
Polio
Aids
Herpes simplex
Measles 
Mumps 
Norovirus
Rotavirus

Livestok pathogens:
Foot and mouth disease]Equine flu
African swine fever
Bluetongue

Question 2

What ways can viruses be transmitted?

Answer 2

Horizontal transfer- person to person/cell to cell

Water and airborne viruses

Contaminated food/water

Contaminated soil, surfaces (fomites)

Contact with animals (zoonoses)

Vector born infections (insects, arthopods)

Question 3

What is the importance of viral vectors?

Answer 3

They can naturally support propagation and transmition of a virus

Seasonal factors and available vectors can influence the ptognosis and transmition of viruses

There can be multiple viral intermediates

Question 4

True/false? Viral genomes can carry oncogenes that transform cells?

Answer 4

True

Question 5

Breifly describe how oncogenetic viruses work.

Answer 5

Suppress or inactivate tumour suppressor genes by viral integration into host genome

activation will cause cancer
supression will not

Question 6

Give some examples of some oncogenetic viruses

Answer 6

HIV: Kaposi sarcoma
Human popillomavirus: cervical cancer
Hep B and C: liver cancer
HTLV-1: Human T cell leukemia