Transmission Of Communicable Disease

Question 1

What is communicable disease

Answer 1

An illness caused by an infectious agent through direct or indirect transmission from an infected individual to an animal or human host

Question 2

What are the 5 main classes of infectious agents

Answer 2

Viruses
Bacteria
Fungi
Parasites
Prions

Question 3

Where do smaller droplets come from

Answer 3

The lower respiratory tract

Question 4

Where do large droplets come from

Answer 4

The upper respiratory tract

Question 5

In droplet size order list the 3 respiratory from largest to smallest

Answer 5

Nasopharyngeal, tracheobronchial and pulmonary

Question 6

What is the chain of infection 6 stages

Answer 6

Infectious agent
Reservoir
Portal of exit
Transmission
Portal of entry
Susceptible host

Question 7

What are the 3 steps to infection

Answer 7

Colonisation
Invasion and propagation
Attack by immune system

Question 8

Define vector

Answer 8

A carrier that a pathogen can use to travel from a reservoir of disease to a susceptible host

Question 9

Define reservoir

Answer 9

An infectious agent is the habitat where an infectious agent normally lives, grows and multiplies

Question 10

Define pathogenicity

Answer 10

The mechanisms by which pathogens cause disease

Question 11

Define latent period

Answer 11

The period between infection of the host and the clinical manifestation of disease