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Geography A Level > Disease > Flashcards

Flashcards in Disease Deck (12):
1

What are infectious diseases

Spread by pathogens such as bacteria viruses parasites and fungi.

Most can be transmitted from one person to the next

2

What are contagious diseases

Type of infectious disease

Bacterial infections eg typhoid

Viral diseases eg Ebola

3

What are zoonotic diseases

Infectious diseases which are transmitted form animals to humans eg rabies

4

Non infectious diseases

Causes -
Nutritional deficiencies eg rickets
Lifestyle eg diabetes
Genetic inheritance eg cancer

5

Endemic diseases

Exist permanently in a geographical area or population group eg sleeping sickness in sub Saharan Africa

6

Epidemic

An outbreak of disease that attacks many people at the same time and spreads through a population in a restricted geographical area eg Ebola in west Africa 2014

7

Pandemic

An epidemic that has spread worldwide eg Black Death

8

Disease diffusion

Disease spreads outward from its origin and across space

9

Expansion diffusion

A disease has a source and spreads outwards into new areas. Meanwhile seekers in the source area remain infected eg tuberculosis

10

Relocation diffusion

A disease leaves the area or origin and moves to new areas eg cholera 2010 moves from Nepal to Haiti

11

Contagious diffusion

The spread of disease through direct contact with a carrier eg Ebola epidemic west Africa 2014-2015

12

Hierarchical diffusion

Disease press’s through an ordered sequence of places

Also channeled along road, rail and air transport networks which facilitate contact between carriers and susceptible population

Eg 2009 H1N1 flu virus became a pandemic via international flights