Intro

Question 1

parasitism

Answer 1

a two-species association in which one species (parasite) lives on or in a the second for a significant period of its life and obtains nourishment.

Question 2

microparasites - protozoa

Answer 2

Protozoa
replicate in the host so infection levels can rise rapidly after a single infection event (malaria)

Question 3

microparasites - worm

Answer 3

worm
cannot replicate in the host
levels of infections determined by the number of infections events and number of infective stages

Question 4

Example of a parasite never exposed to the external world, completes development in host

Answer 4

Trichinosis - spiral threadworm

Question 5

Example of a parasite never exposed to the outside world, and development takes place in two or most hosts

Answer 5

Malaria

Question 6

What is a vector

Answer 6

when one host transmits another

Question 7

Definitive host

Answer 7

Where parasite reaches sexual maturity

Question 8

intermediate host

Answer 8

larval, juvenile or non-sexual stages develop

Question 9

example of parasite exposed to external world for varying period of time, doesn’t have active free-living stages

Answer 9

Tapeworms

Question 10

parasite exposed to external world as an active, free living form during development and transmission between hosts

Answer 10

hookworm
they penetrate skin