Lecture 45 - Intro to Parasitology

Question 1

describe protozoa

Answer 1

single-cell parasites
intra- and extra- cellular
self-replicate in host

Question 2

T/F: replication is necessary for pathology caused by protozoa

Answer 2

TRUE

Question 3

describe flukes (trematodes)

Answer 3

• multicellular
• individual adult organisms DO NOT self-replicate in host

Question 4

describe tapeworms (cestodes)

Answer 4

• multicellular
• individual adult organisms DO NOT self-replicate in host

Question 5

describe roundworms (nematodes)

Answer 5

• large, multicellular parasites
• individuals DO NOT self-replicate in the host

Question 6

describe arthropods

Answer 6

• multicellular parasites
• vectors
• individuals DO NOT self-replicate in the host

Question 7

what high-level group is:

Haemonchus contortus

Answer 7

nematode

Question 8

what high-level group is:

Macracanthorhynchus insignis

Answer 8

acanthocephalan

Question 9

what high-level group is:

Amblyomma americanum

Answer 9

arthropod

Question 10

what high-level group is:

Fasciola hepatica

Answer 10

trematode

Question 11

what high-level group is:

Dipylidium caninum

Answer 11

cestode

Question 12

what high-level group is:

Trypanosoma cruzi

Answer 12

protozoa

Question 13

what is the common name/group for:

Paragonimus kellicotti

Answer 13

lung fluke

Question 14

what is the common name/group for:

Ostertagia ostertagi

Answer 14

trichostrongyle

Question 15

what is the common name/group for:

toxocara cati

Answer 15

ascarid

Question 16

what is the common name/group for:

bovicola equi

Answer 16

chewing louse

Question 17

what is the common name/group for:

anoplocephala

Answer 17

tapeworm

Question 18

what is the common name/group for:

tritrichomonas foetus

Answer 18

mucoflagellate

Question 19

oxyuris equi life cycle

direct or indirect?
type of host?
parasite stages?
host specificity?
zoonotic?

Answer 19

direct
definitive
adult, ovum
high host specificity
not zoonotic

Question 20

physaloptera life cycle

direct or indirect?
type of host?
parasite stages?
host specificity?
zoonotic?

Answer 20

indirect
definitive, intermediate, paratenic, sylvatic, and reservoir hosts
adult, ova, ineffective and arrested larvae
low host specificity
not zoonotic

Question 21

A parasite that is transmitted to the next definitive host
without development in an intermediate host.

Answer 21

direct life cycle

Question 22

The host in which the sexually mature parasite resides.

Answer 22

definitive host

Question 23

A form of asexual reproduction that many protozoa utilize.

Answer 23

binary fission

Question 24

Ostertagia ostertagi

Answer 24

pasture-borne nematode

Question 25

An optional host, in which a parasite does not develop but utilizes as a transport host.

Answer 25

paratenic host

Question 26

An arthropod life cycle in which the nymphal stages look like the adult arthropod.

Answer 26

simple metamorphosis

Question 27

Ctenocephalides felis

Answer 27

holometabolous

Question 28

what are the 3 forms of trauma pathogenesis

Answer 28

1. direct 2. indirect 3. organ occlusion

Question 29

what determines disease state

Answer 29

parasite number and pathogenicity

Question 30

what are the 3 classifications of pathogenicity in a host

Answer 30

1. no effect 2. subclinical 3. clinical

Question 31

infection

Answer 31

presence of an agent that has potential to cause disease

Question 32

disease

Answer 32

occurence of dysfunction/pathology

Question 33

infectious

Answer 33

infected host capable of transmitting infection to another host

Question 34

infection, disease, infectious? The dog showed no adverse symptoms to the 2 female Dirofilaria immitis in its pulmonary arteries.

Answer 34

infection

Question 35

infection, disease, infectious? A lamb with 1,000 juvenile Haemonchus contortus in its abomasum suffers from severe anemia.

Answer 35

infection and disease

Question 36

infection, disease, or infectious? A cat, suffering small bowel diarrhea, passes Giardia cati cysts in its stool

Answer 36

infection, disease, and infectious

Question 37

infection, disease, or infectious? After using the bathroom, she was horrified to see that she had passed several active segments of the beef tapeworm, Taenia saginata.

Answer 37

infection +/- infectious

Question 38

infection, disease, or infectious? Eimeria sp. oocysts are found on a dog’s annual wellness visit.

Answer 38

none

Question 39

prepatent period

Answer 39

developmental/maturation time needed between time of infection to offspring production

Question 40

patent

Answer 40

an infection in which sexually mature parasites are generating offspring

Question 41

what is the parasitological concept associated with: Within the definitive host, the period of parasite development from host infection to production of parasite offspring.

Answer 41

prepatent period

Question 42

what is the parasitological concept associated with: oxyuris equi

Answer 42

high host specificity

Question 43

what is the parasitological concept associated with: a parasite that can infect a human

Answer 43

zoonotic

Question 44

what is the parasitological concept associated with: degree of host-parasite compatibility

Answer 44

host specificity

Question 45

what is the parasitological concept associated with: An infection in which the parasite is producing offspring.

Answer 45

patent