CB5D Pathogens

Question 1

Describe cholera

Answer 1

Caused by cholera bacterium
Spread by drinking water
Symptoms are diarrhoea and vomiting

Question 2

How can the incidence of cholera be reduced

Answer 2

Access to clean water
Improved sanitation

Question 3

Describe tuberculosis

Answer 3

Caused by Mycobacterium tuberculosis bacterium

An airborne bacteria spread by droplet infection

Symptoms lung damage, chesty cough and wheezing

Question 4

How can the transmission of TB are reduced

Answer 4

Improved hygiene

Infected people avoid crowded areas

Increased ventilation in the house

Question 5

What is Cholera ash dieback

Answer 5

Caused by a fungus that infects ash trees

Spread via airborne spores carried by wind

Causes dark lesions on bark

Question 6

How can transmission of Cholera ash dieback disease be reduced

Answer 6

Control the movement of ash trees

Kill infected plants

Replant with a different species

Question 7

Describe malaria

Answer 7

Caused by plasmodium

Spread via mosquito vectors

Flu like symptoms and damage to red blood cells

Question 8

How can the incidence of malaria be reduced

Answer 8

Mosquito nets

Insect repellant

Cover arms and legs

Question 9

Describe HIV

Answer 9

Spread by direct contact with infected body fluids e.g semen and breast milk

Destroys white blood cells and leads to AIDS

Question 10

How can spread of HIV be reduced

Answer 10

Use of condoms and protected sex

Question 11

Describe stomach ulcers

Caused by Helicobacter pylori bacterium

Transmitted orally

Symptoms are vomiting