7. Disease & Biosecurity Flashcards
1
Q
Examples of micro-parasites
A
- viruses
- bacteria
- protists
- fungi
2
Q
Macro-parasite examples
A
- worms
* arthropods
3
Q
What type of disease do parasites cause
A
infectious
4
Q
What are some key facts about parasite transmission
A
- to survive, parasites need to infect new animal hosts
- parasites can jump to similar animal hosts (zoonoses)
- often carried in feces and urine
- they must be passed on before the host dies
5
Q
Why did industrial revolution cause more disease?
A
- factories employed many workers in cities which led to migration into cities
- dense living
- waste thrown onto street
- drinking water obtained where sewage went
- few public taps so water was stores and went bad
6
Q
What was the great sanitary movement?
A
- reduced poverty and disease
- public ownership of water supply and aquaducts built
- public sewer system
7
Q
Vaccinations
A
- activates immune system without causing disease
* increases number of resistant individuals
8
Q
Why is it more difficult nowadays to eradicate certain diseases?
A
- evolution of resistant strains
- increased human density
- worldwide jet transport
- less public awarenss > little immunity
