Transmission Of Pathogens

Question 1

Direct transmission

Answer 1

Direct transmission of pathogen from host to host with no intermediary

Question 2

Means of direct transmission

Answer 2

Direct physical contact - touch e.g. HIV, bacterial meningitis

Faecal-oral transmission - eating/drinking e.g. Cholera, good poisoning

Droplet infections - TB

Spores - tetanus

Question 3

Ways to stop transmission

Answer 3

Contact- wash hands regularly + keep surfaces clean

Faecal-oral transmission - thorough washing and cooking

Droplet - catch it bin it kill it

Spores - mask , wash skin after contact with soil

Question 4

Social factors that affect transmission

Answer 4

Overcrowding 
Poor ventilation 
Poor health 
Poor diet 
Homelessness

Question 5

Indirect transmission

Answer 5

Passing a pathogen from host to host using a vector

Question 6

Life cycle of plasmodium / transmission of malaria

Answer 6

Person with malaria -> gametes of plasmodium in blood -> female anopheles mosquito sucks blood -> plasmodium develops + migrates to mosquito’s salivary glands -> uninflected person bitten -> plasmodium migrates to liver -> plasmodium migrates to blood

Question 7

Examples of vectors

Answer 7

Mosquitos
Fleas
Ticks
Beetles