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Parasitology (TS) > Parasit Final TS > Flashcards

Parasit Final TS Flashcards

1
Q

Where does Musca Autumnalis lay their eggs?

A

fresh cattle dung

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2
Q

What pathogen can musca autumnalis transmit?

A

Moraxella bovis - kertaoconjuctivitis

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3
Q

What is the worm that uses Musca autumnalis as an intermediate host?

A

Thelazia (eye worm)

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4
Q

What 2 types of flies have bayonet like mouth parts?

A

Stomoxys (stable fly) and Haematobia (horn fly)

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5
Q

Where do stomoxys flies lay their eggs?

A

decaying vegetable matter

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6
Q

What are stomoxys flies an intermediate host for?

A

Habronema (stomach worm in horses)

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7
Q

What lesions do stomoxys cause on animals?

A

puncture wound that bleeds freely, both female and males suck blood

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8
Q

What are the hosts of haematobia?

A

mostly cattle, sometimes horses

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9
Q

Where do haematobia flies feed?

A

top line, withers, base of horns

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10
Q

Where do haematobia flies lay their eggs?

A

fresh dung

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11
Q

What is the importance of the haematobia fly?

A

millions in economic losses to cattle production through irritation and annoyance

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12
Q

What uses haematobia fly as an intermediate host?

A

Stephanofilaria stillesi (filarial parasite of cattle skin)

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13
Q

What are the 2 other names for Melophagus ovinus?

A

sheep keds, hippoboscid fly

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14
Q

What kind of fly is Melophagus ovinus?

A

hippoboscid fly - wingless dipteran

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15
Q

What is the life cycle of Melophagus ovinus?

A

modified complex metamorphosis - entire life cycle on sheep, gives birth to larvae

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16
Q

What is the importance of Melophagus ovinus?

A

damaged wool - stained with ked feces

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17
Q

What is the host of most louse flies?

A

wild birds - raptors, songbirds, pigeons

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18
Q

What are characteristics of louse flies?

A

long wings, flattened, dark brown

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19
Q

What is the life cycle of louse flies?

A

similar to melophagus, modified complex metamorphosis

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20
Q

What is the common name for Cochlomyia hominivorax?

A

The primary (american) screwworm

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21
Q

What are the hosts of the primary screwworm?

A

any warm blooded mammal, including humans

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22
Q

What are the characteristics of the primary screwworm?

A

distinct band of spines, two breathing tubes are deeply pigmented

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23
Q

What is the life cycle for the primary screwworm?

A

breed only once during life time, lay eggs in clean/fresh wounds

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24
Q

What is the importance of the primary screwworm?

A

must be reported to USDA or state vet

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25
Q

What is being done to control primary screwworm?

A

sterile male release technique

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26
Q

What is the common name for Hypoderma sp?

A

cattle grubs, ox warbles

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27
Q

What are the characteristics of Hypoderma spp?

A

adults have no functioning mouth parts

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28
Q

What do Hypoderma sp. cause in cattle?

A

terror, cause lesions

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29
Q

What cautions should be taken when treating Hypoderma sp?

A

rupture of larvae leads to abscess

do not treat in late fall when they are in submucosa of esophagus

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30
Q

When is the best time to treat Hypoderma spp?

A

summer or early autumn

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31
Q

What is the common name of Oestrus spp?

A

nasal botfly of sheep

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32
Q

What is the life cycle of Oestrus spp?

A

complex modified

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33
Q

What is false gid?

A

larvae of oestrus penetrate cribiform plate and migrate to brain

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34
Q

What is the pre patent period of the horse botfly in the stomach?

A

10-12 months

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35
Q

What is the scientific name of horse botfly?

A

Gasterophilus spp

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36
Q

What are the common names for cuterebra sp?

A

wolves, warbles

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37
Q

What are the preferred hosts of cuterebra?

A

rabbits, mice, squirrels, chipmunks

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38
Q

What are the accidental hosts of cuterebra?

A

cats, dogs, humans

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39
Q

How do cuterebra get inside host?

A

penetrate natural body opening and migrate in subQ tissues, produce large cysts

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40
Q

What can cuterebra spp cause in dogs and cats?

A

fatal cerebral myiasis, feline ischemic encephalopathy

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41
Q

What flea carries the plague?

A

Xenopsylla cheopis

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42
Q

What is the scientific name for human body louse?

A

Pediculus humanus

43
Q

What are the fleas found on birds?

A

Echidnophaga gallinacea

44
Q

What kind of drugs can you use against lice?

A

same as fleas

45
Q

What is a chewing lice that infects dogs and transmits diplydium caninum?

A

Trichodectes canis

46
Q

What is the chewing louse of cats? What does it look like?

A

Felicola spp., large trangular head

47
Q

What species does Damalinia (bovicola) cheweing lice infect?

A

cattle, horses, sheep, goats

48
Q

What is the genus of bed bugs?

A

Cimex

49
Q

What is the common name of pentastomes?

A

tongue worms

50
Q

What does the mouth of a pentastome look like?

A

surrounded by four hooked claws

51
Q

What is the definitive host for pentastomes?

A

reptiles

52
Q

What is the canine pentastome?

A

Linguatula serrata

53
Q

What are the clinical signs of canine pentastome (Linguatala serrata)?

A

difficulty breathing

54
Q

What are two ticks that can cause tick paralysis?

A

dermacentor and amblyomma

55
Q

What do hard ticks have that make them hard?

A

scutum

56
Q

What hard tick transmits berrelia burgdorferi (lyme disease)

A

Ixodes scapularis

57
Q

What characterizes Ixodes ticks?

A

anal groove is distinct

58
Q

What ways is lyme disease spread through ixodes ticks?

A

interstadial transmission, a larval tick carries it and transmits after it molts

59
Q

Which hard tick has the most virulent tick paralysis?

A

Ixodes holocyclus - in austrailia

60
Q

What is the wild host of babesia?

A

white tailed deer

61
Q

What is important about the spread of babesia among ticks?

A

Transovarian transmission: incorporated into ovary - nymph and adult progeny can transmit

62
Q

Where is babesia reportable in bovines?

A

US and europe

63
Q

What can babesia cause in equine?

A

abortion

64
Q

What are the characteristics of the dermacentor tick?

A

festoons, ornate, dark brown with white color on scutum

65
Q

What can dermacentor ticks transmit that is uniformaly fatal diz in cats? What is the ddx?

A

Cytauzoon felis - death occurs in 24 hours

dog: hepatazoon?

66
Q

What are the 2 species of dermacentor ticks that can transmit cytauzoon felis?

A

D. andersoni an D. variabilis

67
Q

What tick is very prevelent in grenada? what does it look like?

A

Rhipicephalus

68
Q

What can rhipicephalus ticks transmit?

A

ehrlichia (others - hepatozoon, piroplasmosis)

69
Q

What tick can transmit hepatozoon americanum?

A

Amblyomma

70
Q

What may amblyomma ticks do in humans?

A

cause meat allergy

71
Q

How can dogs get H. canis?

A

ingesting rhipicephalus sanguineus tick containing sporulated oocysts

72
Q

How can dogs get H. americanum?

A

ingesting Amblyomma tick containing sporulated oocysts

73
Q

What are the clinical signs of H. americanum?

A

periosteal proliferation (fever, neutrophilic leukocytosis, myalgia, weakness)

74
Q

What is the treatment for H. americanum?

A

no treatment!

75
Q

What 2 soft ticks do we need to know?

A

Argas - the fowl tick

Otobius megnini - spinose ear tick

76
Q

What can the argus tick larvae cause in young chickens?

A

tick paralysis, fatal flaccid paralysis

77
Q

What tick life cycles are found attached to the ears in otobius megnini?

A

larval and nymphal

78
Q

What are the CS of otobius megnini in horses?

A

muscle crampin, colic-like, sweating, muscle tremors, muscle fasciculations

79
Q

What is the common name of ophionyssus natricis? What are the CS?

A

snake mite

difficulty shedding skin

80
Q

What technique is used to diagnose mesostigmatid mites?

A

berlese technique

81
Q

What is the mesostigmatid mite that causes sneezzing and rhinitis in dogs?

A

Pneumonyssoides

82
Q

What species is sarcoptes spp reportable in?

A

all LA except swine

83
Q

What are the characteristics of sarcoptes mites?

A

long, unsegmented pedicles

84
Q

What mite causes pruritis so intense that guinea pigs are subject to fits and seizures?

A

Trixacurus caviae (also seen in chewing lice)

85
Q

What mite causes scaly leg in chickens and turkeys?

A

Knemidokoptes mutans

86
Q

What are the characteristics of psroptes mites?

A

long, three segmented pedicels

87
Q

What mite is reportable in ALL large animal species? What disease does it cause?

A

psorptes ovis

scab mange - doesnt burrow

88
Q

What mite is found in rabbits and causes otitis externa?

A

Psoroptes cuniculi

89
Q

What is the superficial dwelling mite in cattle, sheep, horses, and hedgehogs?

A

Chorioptes bovis

90
Q

What are the characteristics of chorioptes bovis mite?

A

short, unsegmened pedicel

91
Q

What does chorioptes cause in horses?

A

dermatitis of the legs, near the mane and tail

92
Q

What does chorioptes cause in hedgehogs?

A

pruritis and loss of quills

93
Q

Where is otodectes mites found in dogs, cats, and ferrets?

A

external ear canal an adjacent skin

94
Q

What are the characteristics of otodectes mite?

A

short, unsegmented pedicels

95
Q

Where do demodex mites live?

A

hair follicles and sebaceous glands of mammals (and humans) but not zoonotic - species specific

96
Q

If a puppy comes in with localized hair loss and cigar shaped mite, what is it?

A

demodex

97
Q

Where do puppies get demodex mites?

A

from moms during nursing

98
Q

What are the clincal signs of persistant demodex?

A

generalized hair loss and scaling

99
Q

What can predispose dogs to demodex?

A

T-cell autosomal recessive gene

100
Q

What are the CS of demodex in cattle?

A

egg sized nodules on neck and forequarters

101
Q

What are the defining characteristics of cheyletiella?

A

big palpabal claws

102
Q

What are the CS of cheyletiella mites?

A

walking dandruff - bran like exfoliativee dermatitis

103
Q

What species are the mite larvae parasitic and is zoonotic?

A

chiggers (mite)

Parasitology (TS) (10 decks)

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