PARASITOLOGY

Question 1

living together of phylogenetically different organisms

Answer 1

Symbiosis

Question 2

beneficial to both organisms (++)

Answer 2

Mutualism

Question 3

beneficial to one, neutral to the other (+0)

Answer 3

Commensalism

Question 4

beneficial to one, parasitic to the other (+-)

Answer 4

Parasitism

Question 5

adult of sexual stage of the parasite

Answer 5

Definitive Host

Question 6

larval or asexual stage of the parasite

Answer 6

Intermediate Host

Question 7

parasite does not develop, but remains alive and is infective to the next host

Answer 7

Paratenic Host

Question 8

allows parasite’s life cycle to develop or continue, and serve as source of human infection

Answer 8

Reservoir Host

Question 9

depends entirely for host existence

Answer 9

Obligate Parasite

Question 10

parasitic and free living existence

Answer 10

Facultative Parasite

Question 11

larval stage passed in a host, and adult stage is free living

Answer 11

Transitory Parasite (Homoxenous)

Question 12

completes its cycle in 1 host (H. nana)

Answer 12

Permanent Parasite (Homoxenous)

Question 13

requires 2 or more hosts for larval and adult stages

Answer 13

Periodic Parasite (Heteroxenous)

Question 14

primarily infects animals and may be acquired by man

Answer 14

Zoonotic Parasite

Question 15

occurs in unusual host

Answer 15

Accidental Parasite

Question 16

occurs in unusual organ (A. lumbricoides)

Answer 16

Erratic Parasite

Question 17

passes through intestinal tract without causing any disturbance (usually ingested eggs)

Answer 17

Spurious Parasite

Question 18

Infection - lives inside the hosts body

Answer 18

Endoparasite Infection - lives inside the hosts body

Question 19

infestation - lives in body surfaces

Answer 19

Ectoparasite

Question 20

visits the host during feeding time

Answer 20

Intermittent Parasite

Question 21

transmits a parasite after latter has completed part of its development
Ex: mosquitoes, biting flies, kissing bugs, ticks

Answer 21

Biologic Vector

Question 22

responsible only for transporting the parasite via its appendages
Ex: cockroaches, house flies

Answer 22

Mechanical/Phoretic Vector

Question 23

mouth/oral cavity, skin, urogenital tract, nasal passages, transplacental mode of transmission

Answer 23

Portal of Entry

Question 24

anus, mouth, urogenital tract, non-intact skin

Answer 24

Portal of Exit