General

Question 1

What are 5 things that define a parasite?

Answer 1

1. Different species to host
2. Intimate association, inside or on host body
3. dependent on host, metabolically or physiologically
4. Recognised by host as foreign
5. Harmful

Question 2

6 types of parasitism

Answer 2

1. endoparasite
2. ectoparasite
3. microparasite (protozoa, bacteria, virus)
4. macroparasite (eg worms)
5. Obligate parasite (always parasitic for part of the lifecycle)
6. facultative parasite (will be parasitic if opportunity arises)

Question 3

what are direct and indirect transmission cycles?

Answer 3

Direct - one host, with no intermediate host, monogenetic

Indirect - involves intermediate hosts

Question 4

define: definitive host
intermediate host
vector

Answer 4

definitive - in which parasite undergoed sexual reproduction
intermediate - in which parasite develops/multiplies asexually
vector - micropredator which actively delivers parasite to nest host.

Question 5

What is Zoonosis?

Answer 5

disease naturally transmitted between VERTEBRATE animals and humans

Question 6

what are advantages of a parasiticlifecylce?

Answer 6

Stable environment

food freely available

Question 7

what are disadvantages of a parasitic lifecycle?

Answer 7

have to find new host
have to find developmental site in host
need to avoid host defences