Influenza

Question 1

What pathogen is influenza

Answer 1

Virus

Question 2

What is the genus? (Influenza)

Answer 2

Influenza (write Influenza virus)

Question 3

What are the types of influenza

Answer 3

Type A - infects various mammals (including humans) spread via aquatic birds
Type B - infects humans, spread via humans
Type C - primarily infects humans, causes mild infection primarily in children
Type D - found in cattle and pigs, can infect humans but not known to cause illness

Question 4

How is it transmitted

Answer 4

Indirect - left on a surface which a host touch’s and takes in

Direct - respiratory drop from stuff like sneezing and coughing

Question 5

Structural features of a virus

Answer 5

Non-cellular/“living”
Protein coat/capsid
Nucleic acid or DNA or RNA
Can only replicate using a host cell

Question 6

Viral life cycle

Answer 6

1 Attachment- virus recognises and binds to a host cell via a receptor molecule on cell surface
2 Entry- virus or genetic material enters cell
3 Genome replication and gene expression- viral genome copied and genes expressed making viral proteins
4 assembly- new viral particles are assembled from viral genome and proteins
5 release- completed viral particles exit cell and can infect others