Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

parasitology > round worms > Flashcards

round worms Flashcards

(91 cards)

Start Studying
1
Q

what is unique about the nematode (roundworm) body

A

epidermis covered by a cuticle

complete digestive tract (separate mouth + anus)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how many juvenile (larval) stages are there and what occurs at the end of each stage?

A

four
molting occurs, growth occurs before and after molting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

in parasitic nematodes what is the infective stage to the definitive host?

A

L3
L3–>L4 once in definitive host

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

GI nematodes that typically acquired by ingestion of infective eggs or larvae

A

monoxenous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

GI nematodes ingestion of infected intermeidate (or paraentenic) hosts

A

heteroxenous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

nematodes that undergoe heptao-tracheal migration

A

ascarids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

nematode that infects SI of swine and humans

A

ascaris suum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

nematode that infects the SI of horses

A

parascaris equorum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

disease that is primarily in young animals can cause respiratory signs in young pigs and foals

A

ascarosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

prevention by deworming and washing sows/mares prior to birthing, keeping young animals away from contaminated pastures/stalls and prophylactic pyrantel treatment

A

Ascarids: A. suum & P. equorum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

ascaridids prepotent infections

A

lung and tissue for baermann test

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what nematode is resistant to ivermectin an moxidectin

A

P. equorum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

SI of mammals; monoxenous

A

toxocara spp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

toxocara in domestic and wild canids

A

T. canis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

toxocarain domestic and wild felids

A

T. cati

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

disease can be severe in puppies, usually subclinical or mild in kittens; symptomatic infections can occur in adult cats but rare in adult dogs

A

toxocariasis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

T/F: Toxocara canis and Toxocara cati are zoontic; children are especially at risk

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

SI of chickens, turkeys, ducks, geese, and diverse wild birds, monoxenous; fecal-oral transmission

A

ascaridia galli
common round worm of domestic poultry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

treatment for ascaridia galli

A

fenbendazole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

monoxenous cecal worm of chickens, turkeys, other galliform birds

A

heterakis gallinarum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what serves as an intermediate host and vector for the turkey pathogen histomonas meleagridis

A

heterakis gallinarum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

parasite of the posterior gut of arthropods and vertebrates, highly host-specific, monoxenous

A

oxyurids- pinworms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

pinworm that descends the small colon and also large colon of equids

A

oxyuris equi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

egg masses are glued to perianal skin; causes perianal itching

A

Oxyuris equine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
The most common roundworm of domestic poultry
Acardidia galli
26
Trichinelloids (Trichuris)
whipworms monoxenous, host-specific, cecum and colon of mammals
27
Trichuris larvae are in ____, adults are in _____
SI mucosa cecum & colon
28
whipworm found in canids world wide
T. vulpis
29
whipworm found in swine worldwide common in US swine
T. suis
30
with heavy infections what can cause rectal prolapse in dogs
T. vulpis
31
heteroxenous
infected individual is both definitive and intermediate host
32
most human cases in US come fro eating raw or undercooked pork or bear
Trichinellosis
33
prevent by cooking meat to safe temperatures, careful control of pig farming, preventing scavenging by pets, don't feed pets raw meat
Trichinelloids
34
treatment options for trichinella
mebendazole or albendazole
35
what are the 4 major groups of strongylida
1. GI "hairworms" and trichostrongyloid lungworms 2. large bowel stongyles and nodular worms 3. hookworms 4. metastrongyloid lung, vascular and neural worms
36
what groups of strongylida are monoxenous
groups 1-3
37
what group out of the strongylida is heteroxenous
group 4
38
most infect the abomasum or stomach
trichostrongyloids
39
infective larval stage of trichostrongyloids
L3
40
trichostrongyloid species that feed on blood
Haemonchus spp.
41
trichostrongyloid species that infect respiratory passages
Dictylocaulus
42
where is arrested development occur in trichosterongyloids
in the host L3 or L4
43
latent, inhibited or hypobiotic larvae
arrested larvae
44
importance of arrested larval development
- avoid conditions not optimal for growth/development/survival - resumption of development of a large number at one time -can cause significant disease in host - arrested larvae may be less susceptible to anthelmintics
45
most important helminth parasite of sheep and goats in USA
Haemonchus contortus
46
cooperia spp that infects SI of cattle
Cooperia punctata
47
infects bronchial tree of cattle and other ruminants
Dictyocaulus viviparus
48
diagnosis of trichostrongyloid lungworms
ID larvae in feces (Baermann apparatus)
49
diagnosis of trichostrongyloid GI worms
ID eggs in fecal sample & fecal egg count
50
most strongyloid worms infect the ?
large intestine cause blood loss & damage to mucosa
51
Strongylus vulgaris
large strongyles of equine colon & cecum
52
Triodontrophorus spp
adults eat mucosal plugs and blood; larvae are non-migratory
53
small strongyles of equine cecum and colon
Cyathostomins
54
Adult Strongylus vulgaris
strongyloid of equine cecum and colon
55
Mass emergence of hypobiotic cyathostomin larvae causing acute onset of profuse diarrhea, sudden weight loss, pyrexia, colic, subcutaneous edema, etc. Can be fatal, especially in young animals.
larval cyathostominosis
56
swine kidney worm
stephanurus dentatus
57
life cycle of stephanurus dentatus
adult worms in renal and peripheral tissue --> eggs in urine -swine ingested L3s or infected paratenic host (worms); percutaneous infection of L3s -larval migration in liver and stay there for long time (primarily site infection), then when ready to go an develop into adults in the kidney and get excreted
58
where do syngamid worms infect
upper respiratory tract of birds and mammals
59
syngamid worms also referred to as
gapeworms
60
worm found in domestic and wild galiform birds
syngamus trachea
61
life cycle of syngamus trachea
birds ingest L3s infective eggs or infective paratenic host --> larvae migrate SI to liver to the lungs --> obstruct airway adults
62
where are hookworms mainly found
parasite of SI of mammals
63
paratenic host of syngamus trachea
earthworms. terrestrial mollusks, larval flies
64
ancylostomatoids primarily impact what species?
mainly dogs cats ruminants
65
how does ancylstomatoids infect host
L3s typically ingested or can penetrate skin -go straight to thee lungs and climb up and get swallowed and stay in SI -milk and SI stay and develop into adults
66
dog ancylstomatoids spp (hookworm) that infect dogs
ancylostoma caninum A. braziliense
67
cat ancylstomatoids spp that infect cats
ancylostoma tubaeforme A. braziliense
68
what is more pathogenic the dog ancylostoma spp or the feline
dog
69
if a dog is older than 3 months what larvae arrest in the skeletal muscle and SI wall? what happens if they are female? and when do they become activated?
A. caninum -during pregnancy they migrate to mammary glands --> milk --> pups -and adult hookworms can get lost from the SI are arrestely developed and pass once dewormed
70
hookworm of domestic ruminants, cattle
Bunostomum phlebotomum
71
ancylostomatoids
hookworms
72
hook worm species that percutaneous route of infection predominates
bunostomum spp
73
what parasite infect the resp tract, vascular, and nervous system of mammals
metastrongyloids
74
metastrongyloid lungworms of the sheep and goats
protostrongylus rufescens muellerius capillaris
75
most common lungworm of cats
aelurostrongylus abstrusus
76
metastrongyloid lungworm of dog what is reservoir host
crenosoma vulpis red fox (vulpes vulpes) reservoir host
77
filaroides spp what stage odf lifecycle is infective?
direct life cycle L1s are infective
78
two filaroides spp that infect airway of dogs
F. osleri F. hirthi
79
what species of hookworm zoonotic and causes cutaneous larva migrans
A. braziliense A. caninum
80
ancylostoma caninum paratenic host?
rats
81
syngamus trachea paratenic host
earthworms, terrestrial mollusks, larval flies
82
threadworm strongyloides species that infects dogs, cats, humans and other primates
S. sterorlais
83
treatment for mammals and birds of strongyloides spp
mammals: ivermectin birds: tetramisole
84
physaloptera spp that infect the stomach of mammals, birds, reptiles and amphibians what is the intermediate host and the paratenic host
intermediate host: various insects paratenic host: insect eating vertebrates
85
Dx spirurids spp
fecal sedimentation
86
thelazia spp that infect eye worms of mammals and birds, infect conjunctiva sac, lacrimal gland and ducts, who is the intermediate host
flies that feed on ocular secretions
87
habronema muscae intermediate host
housefly and stable fly
88
habronemiasis of equid
habronema muscae
89
spirocerca lupi intermediate and paratenic host
intermediate host: coprophagous beetles paratenic host: insect-eating vertebrates
90
spirocerca lupi complications
aortic aneurysm or rupture with fatal hemorrhaging, esophageal sarcoma --> hypertrophic osteopathy of long bones
91
equine neck threadworm
O. cervicalis

parasitology (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions