Parasitology

Question 1

define mutualism, commensalism, and parasitism

Answer 1

benefits both

benefits one, neutral for the other

benefits one and harmful for the other

Question 2

infection inside body (endo) are divided into:

Unicellular:

Multicellular:

Answer 2

protozoan

helminths (worms)

Question 3

definitive host: the host in which the _ stage of a parasite life cycle occurs

intermediate host: in which the _ reproduction or _ occurs

Answer 3

sexual stage

mosquitos-malaria

humans- schistosoma

asexual, development

snails- schistosoma

humans- malaria

Question 4

the host that is not an obligate part of the parasite life cycle

Answer 4

incidental (accidental)

e.g. humans/toxoplasma

Question 5

the animal hosts that maintain the natural cycle in the wild and are often not harmed by the carriage

Answer 5

reservoir

e.g. mice/toxoplasma

Question 6

the host species that transmits the infectious form of the parasite to another host species

Answer 6

vector

mosquitos-malaria

snails-schistosoma

Question 7

the study of the factors and conditions that control disease transmission

Answer 7

epidemiology

Question 8

the maximum global extent of a disease regardless of intensity

Answer 8

geographic distribution

Question 9

disease intensity in a given area (% susceptible population)

Answer 9

prevalence

sporadic vs endemic vs epidemic

Question 10

new infections in a susceptible population per unit time

Answer 10

incidence

Question 11

phylom platyhelminthes (flat worms) contain these two worms

Answer 11

cestoda (tapeworms)

trematoda (flukes)