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BacT, Virology, Parasit > Parasitology Exam 3 > Flashcards

Parasitology Exam 3 Flashcards

1
Q

Ascaris suum
morphology
host
location
infectious stage
PH
clinical signs

A

3 lips anterior end, males posterior curved end
domestic/wild pigs
GI tract, liver, lungs
L3
parantenic host (beetles/earthworms)
“milk spots in liver”, “thumps

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2
Q

“Trichinosis” Trichinella spiralis
host
location
infectious stage
clinical signs

A

humans, domestic/feral swine
eye, tongue, masticatory muscles, diaphragm, arm, leg mm
ingestion of meat w/ encysted larvae (L1)
nurse cell formation

petechial hemorrhage under nails in humans

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3
Q

which parasite larvae encyst in striated muscle to form nurse cells?

A

Trichinella spiralis, larvae/adults utilize same host, never see outside environment

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4
Q

Metastrongylus sp.
host
location
infectious stage
clinical signs

A

“pig lungworm”
4-7mo old pigs
lungs
ingestion of L3 in IH (earthworms)
bronchitis/lung infection

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5
Q

what stage of Metastongylus sp. is passed in the feces

A

larvated eggs

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6
Q

Nematodirus battus, filicollis, spathiger
morphology
host
location
infectious stage
clinical signs

A

males have bursa
sheep
proximal SI
ingestion of L3
enteritis/diarrhea/death in 2 days

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7
Q

Nematodirus helvetianus
morphology
host
location
infectious stage
clinical signs

A

males have bursa
cattle
proximal SI
ingestion of L3
enteritis/diarrhea/death in 2 days

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8
Q

Gongylonema pulchrum
morphology
host
location
infectious stage
clinical signs

A

“gullet worm”
white, longitudinal rows of cuticular bosses
ruminants, pigs, horses
esophagus, rumen
ingestion of IH w/ L3
esophageal inflammation

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9
Q

Parelaphostrongylus tenuis
morphology
host
location
infectious stage
clinical signs

A

“meningeal worm or brainworm”
L1 have dorsal spine
white-tail deer, moose
veins, venous sinuses of cranial meninges, CNS
ingestion of IH (slugs, snails)
neuro dz, moose sickness

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10
Q

Dictyocaulus viviparous
morphology
host
location
infectious stage

A

males have bursa
cattle
“lung worm”
ingestion of L3

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11
Q

Dictyocaulus filaria
morphology
host
location
infectious stage

A

males of bursa
sheep, goats, camel
“lungworm”
ingestion of L3

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12
Q

Dictyocaulus arnfieldi
morphology
host
location
infectious stage
clinical signs

A

males have bursa
donkeys, rare in horses
“lungworm”
ingestion of L3
donkeys asymptomatic, horses eosinophilic pneumonia

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13
Q

which nematode produces white/red blood-filled zig zag tracts?

A

Gongylonema pulchrum “gullet worm”

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14
Q

what nematode causes human respiratory, GI, malnutrition, impaired cognition, eosinophilic infiltration of tissue and death?

A

Ascaris suum

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15
Q

what nematode results in petechial hemorrhage in conjunctiva and under the nails in humans?

A

Trichinella spiralis “trichinosis”

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16
Q

Ascaridia galli (chickens) & A. columbe (poultry)
host
location
infectious stage

A

galliform birds
small intestine
ingestion of L3 larvated eggs or paratenic host (earthworm)

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17
Q

what nematode is the largest nematode in poultry?

A

A. galli & A. columbe

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18
Q

what stage is passed in A. galli and A. columbe

A

unembryonated eggs are passed into the environment

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19
Q

Heterakis gallinarum
host
location
infectious stage
PH
vector for

A

“cecal worm”
galliform birds/anseriform birds
esophagus & crop
L3
paratenic host (earthworm)
vector for Histomonas meleagridis

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20
Q

what stage of Heterakis gallinarum are passed into the environment?

A

unembryonated eggs passed into environment

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21
Q

Capillaria annulata/Eucoleus annulata
morphology
host
location
IH

A

“hairworms or threadworms”
eggs are similar to Trichuris bipolar plugs
chickens, turkeys, ducks, wild birds
esophagus/crop
earthworm

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22
Q

Baylisascaris procyonis
host
location
infectious stage
clinical signs
PH

A

racoons, dog shedders
GI of DH
L3
visceral larval migrans and ocular larval migrans in humans
PH: rodents, rabbits, birds

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23
Q

what stage of Baylisascaris procyonis is passed in the envrionment

A

unembryonated egg

24
Q

infectious stage of B. procynosis

A

L2 or L3

25
Q

Syngamus trachea
morphology
host
location
infectious stage
clinical signs

A

“tracheal worm”
Y shaped, male/female conjoined
poultry (host), wild birds (reservoir)
trachea
ingestion of embryonated eggs or juveniles
gasping, gaping appearance

26
Q

Dicrocoelium dendriticum
host
location
infectious stage

A

digean trematode - “small lanceolate fluke”
cattle, sheep, goats, lagomorphs
liver
metacercariae in 2nd IH (ants) on vegetation

27
Q

what is the infectious stage of D. dendriticum and Fasicola

A

metacercariae

28
Q

Fascicola jacksoni & F. hepatica
host
location
infectious stage

A

F. jacksoni - elephants
F. hepatica - ruminants
liver/biliary ducts
metacercariae on vegetation

29
Q

difference between D. dendriticum and Fasicola life cycle

A

D. dendriticum
embryonated eggs are passed in feces
1 IH = snails
2 IH = brown ants “formica”
metacercariae in 2 IH on vegetation

Fasicola
unembryonated eggs are passed in feces
1 IH = snails
metacercariae on vegetation

30
Q

Echinococcus granulosus & multiloculari
morphology
host(s)
location

A

tapeworm - short/small, few proglottids in length, proscolex on anterior end
E. granulosus = carnivores, ungulates IH
E. multiloculari = carnivores, wild canids
GI tract

31
Q

difference in E. granulosus and E. multiloculari life cycle and infectious stage

A

E. granulosus = unilocular cyst
E. multiloculari = multilocular cyst

32
Q

what type of cyst to E. granulosa have

A

hydatid cyst

33
Q

what disease does E. granulosus cause

A

Cystic Echinococcosis (CE) “hydatid disease or hydatidosis”

34
Q

what disease does E. multilocular cause

A

Alveolar Echinococcosis (AE)

35
Q

Diphyllobothrium latum
morphology
host
location

A

tapeworm
two longitudinal bothria, L/M genital pores, vitellaria scattered, numerous testes, uterine pore
marine mammals/piscivorous animals
GI of DH

36
Q

Describe D. latum lifecycle
1 IH?
2 IH?
paratenic host?

A
  • unembryonated eggs passed in feces and develop in water
  • coracidia hatch, ingested by 1 IH (crustacean/copebod)
  • procercoid develops in IH
  • 1 IH ingested by 2 IH (small fish)
  • paratenic host (fish) ingests 2 IH
  • DH ingests plerocercoids from PH
37
Q

Eimeria macusaniensis
host
location
infectious stage

A

coccidia
camelids
GI
ingestion of sporulated oocyst

38
Q

what stage of Eimeria is passed into the environment

A

unsporulated oocyst
“sporongy” occurs in the environment

39
Q

what parasite is a disease of hunsbandy/management, presence/absence not associated with disease, is more common in young/stressed animals and severity based on number of oocysts ingested?

A

Eimeria spp.
coccidia

40
Q

Eimeria tenella
host
location
infectious stage

A

poultry, gamebirds
GI tract
ingestion of sporulated oocysts from contaminated feed/water

41
Q

what stage do coccidiostats in feed/water target to prevent outbreaks of EImeria?

what do vx contain?

A

the schizont stage

vx have oocysts

42
Q

Histomonas meleagridis
apicomplexan or non-apicomplexan
host
reservoir
vector
paratenic host

A

NON-APICOMPLEXAN (no cyst)
host - gallinaceous fowl, chickens, turkeys, peafowl, pheasants
reservoir: chickens
vector: heterakis gallinarum
earthworm

43
Q

what are the clinical signs of Histomonas meleagridis

A

blackhead in turkeys
pinpoint ulcers in cecum
cecum filled with cheesy, fowl smelling plugs
white/green areas of necrosis
yellow diarrhea

44
Q

what bacteria is H. meleagridis associated with

A

E.coli & C. perfringens

45
Q

Haematopinus suis
morphology
host
location
vector for?

A

“sucking hog louse”
skin - folds of neck, jowl, flanks, legs
african swine fever, eperythrozoon suis, swine pox

46
Q

largest blood sucking louse in domestic animals is

A

Haematopinus suis “hog louse”

47
Q

Menopon gallinae
morphology
host
location

A

poultry shaft louse - chewing louse
poultry/gamebirds
integument

48
Q

Sarcoptes scabei suis
morphology
host
location
what does each tunnel contain

A

mite - unjointed pedicles, burrowing, claw-like structure
swine
edges of ears, eyes, snout –> pruritis
female + her eggs + her feces

49
Q

Demodex phylloides
morphology
host
location
transmission
lesions

A

follicular mite - elongated
swine
hair follicles, sebaceous glands, eyelids
suckling, hard to transmit due to deep hair follicles
ventral abdomen, neck, eyelids, snout

50
Q

Knemidocoptes spp.
host
location/lesion

A

sarcoptiform mite
poultry, gamebirds
integument - scaly leg and scaly face; mange on beak/face

51
Q

Dermanyssus gallinae
morphology
host
location
life stages

A

“red poultry mite or chicken mite”
anal plate
chickens, turkeys, pigeons, canaries, wild birds
integument
egg, larvae, protonymph, deutonymph, adult

52
Q

Ornithonyssus sp.
host
location

A

“northern fowl mite”
poultry, gamebirds
parting feather in the vent region

53
Q

most important parasite of layers and breeding chickens?

A

Ornithonyssus sp. “northern fowl mite”

54
Q

Echidnophaga gallinacea
morphology
host
location

A

“poultry sticktight flea”
no comb,
poultry, gamebirds
eyes/face

55
Q

Cuterebra spp.
morphology
host
location
life cycle

A

“bot fly”
pink, fleshy young, black spines adult
dogs, cats, rabbits
integument
larvae migrate to SQ form “warble”, can drop into environment

56
Q

obligatory parasites

A

Cuterebra spp. “bot fly”
Ornithonyssus spp. “northern fowl mite”
Gasterophilus intestinalis “equine stomach bot”

57
Q

obligate intracellular parasites

A

Cystoisospora
Sarcocystis
Hepatozoon americanum
Toxoplasma gondii
Neospora caninum

BacT, Virology, Parasit (23 decks)

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