Lecture 45 - Intro to Parasitology Flashcards
describe protozoa
single-cell parasites
intra- and extra- cellular
self-replicate in host
T/F: replication is necessary for pathology caused by protozoa
TRUE
describe flukes (trematodes)
- multicellular
- individual adult organisms DO NOT self-replicate in host
describe tapeworms (cestodes)
- multicellular
- individual adult organisms DO NOT self-replicate in host
describe roundworms (nematodes)
- large, multicellular parasites
- individuals DO NOT self-replicate in the host
describe arthropods
- multicellular parasites
- vectors
- individuals DO NOT self-replicate in the host
what high-level group is:
Haemonchus contortus
nematode
what high-level group is:
Macracanthorhynchus insignis
acanthocephalan
what high-level group is:
Amblyomma americanum
arthropod
what high-level group is:
Fasciola hepatica
trematode
what high-level group is:
Dipylidium caninum
cestode
what high-level group is:
Trypanosoma cruzi
protozoa
what is the common name/group for:
Paragonimus kellicotti
lung fluke
what is the common name/group for:
Ostertagia ostertagi
trichostrongyle
what is the common name/group for:
toxocara cati
ascarid
what is the common name/group for:
bovicola equi
chewing louse
what is the common name/group for:
anoplocephala
tapeworm
what is the common name/group for:
tritrichomonas foetus
mucoflagellate
oxyuris equi life cycle
direct or indirect?
type of host?
parasite stages?
host specificity?
zoonotic?
direct
definitive
adult, ovum
high host specificity
not zoonotic
physaloptera life cycle
direct or indirect?
type of host?
parasite stages?
host specificity?
zoonotic?
indirect
definitive, intermediate, paratenic, sylvatic, and reservoir hosts
adult, ova, ineffective and arrested larvae
low host specificity
not zoonotic
A parasite that is transmitted to the next definitive host
without development in an intermediate host.
direct life cycle
The host in which the sexually mature parasite resides.
definitive host
A form of asexual reproduction that many protozoa utilize.
binary fission
Ostertagia ostertagi
pasture-borne nematode
An optional host, in which a parasite does not develop but
utilizes as a transport host.
paratenic host
An arthropod life cycle in which the nymphal stages look like
the adult arthropod.
simple metamorphosis
Ctenocephalides felis
holometabolous
what are the 3 forms of trauma pathogenesis
- direct
- indirect
- organ occlusion
what determines disease state
parasite number and pathogenicity
what are the 3 classifications of pathogenicity in a host
- no effect
- subclinical
- clinical
infection
presence of an agent that has potential to cause disease
disease
occurence of dysfunction/pathology
infectious
infected host capable of transmitting infection to another host
infection, disease, infectious?
The dog showed no adverse symptoms to the 2 female Dirofilaria immitis in its
pulmonary arteries.
infection
infection, disease, infectious?
A lamb with 1,000 juvenile Haemonchus contortus in its abomasum suffers from severe
anemia.
infection and disease
infection, disease, or infectious?
A cat, suffering small bowel diarrhea, passes Giardia cati cysts in its stool
infection, disease, and infectious
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.
infection +/- infectious
infection, disease, or infectious?
Eimeria sp. oocysts are found on a dog’s annual wellness visit.
none
prepatent period
developmental/maturation time needed between time of infection to offspring production
patent
an infection in which sexually mature parasites are generating offspring
what is the parasitological concept associated with:
Within the definitive host, the period of parasite development
from host infection to production of parasite offspring.
prepatent period
what is the parasitological concept associated with:
oxyuris equi
high host specificity
what is the parasitological concept associated with:
a parasite that can infect a human
zoonotic
what is the parasitological concept associated with:
degree of host-parasite compatibility
host specificity
what is the parasitological concept associated with:
An infection in which the parasite is producing offspring.
patent
