Parasite Exam 2

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Hamatopinus Asini is a

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263 Terms

1

Hamatopinus Asini is a

A) Sucking louse of equids

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2

Arthropods which are parasitic on animals all

C) have chitinous exoskeletons

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3

The biting midges (Culicidae) are members of the sub-order

  • Nematocera

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4

The biological vectors of Dirofilaria immitis are

  • Mosquitos

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5

Which of the following options best describes the mouthparts of the horse fly, Tabanus

  • Rasping

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6

Which of the following statements is true of fleas that feed on domestic animals

  • both sexes suck blood

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7

The lesions of flea bite hypersensitivity in dogs are found mostly

  • around the hind quarters and groin

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8

Which of the following tick species are considered invasie species in the USA

  • Haemophysalis longicornis

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9

Insect bite hypersensitivity in horses is caused by the bites of

  • Culicoides spp.

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10

Tick paralysis is

  • has a good prognosis if tick is removed

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11

Sarcoptc mange is caused by

  • burrowing mites

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12

lice are

  • obligate ectoparsites

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13

Mites that legs extending well beyond their body margin

  • non-burowing mites

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14

Demodicosis in dogs is

  • an infestation of Demodex mites

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15

Best area to take skin scrapig

  • the periphery fo the lesion

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16

Dermanyssus Gallinae

  • can potentially feed on humans

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17

The most important paralysis-inducing Ixodid tick species of cattle in North America is

  • Dermacentor andersoni

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18

On how many hosts do Rhipicephalus Sanguineus feed to complete its life cycle

  • three hosts

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19

Where would you expect to find the mite Pneumonyssoides caninum

  • in the respiratory system of their hosts

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20

An insecticide can be used to treat

  • flea infestation in dogs

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21

Acaricide

any drug or formulation for killing acarids (mites or ticks)

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22

Insecticide

any drug or chemical used for killing insects

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23

Pesticides

substances/mixture of substances for preventing, destroying, repelling or mitigating any pest - used in crop protection

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24

Endectocide

parasiticides (macrocyclic lactones) that affect both nematodes and arthropods

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25

Curative

cure/heal sick animals following the diagnosis of infection

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26

Metaphylaxis

treatment of whole group of animals after diagnosis of infection in part of the group - to prevent the spread of infectious disease

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27

Preventative

treatment of a group of animals before clinical signs to prevent the occurrence of disease or infection (can cause resistance)

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28

strategic

treatment at certain time points according to parasite biology

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29

Mites morphology

2 body parts, 4 pairs of legs, pedipalps (sensory organ), larvae only have 3 pairs of legs, pedicles can end in claws or suckers

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30

Mites metamorphosis

incomplete

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31

mites host

the majority are free-living, some plant predators, some obligate parasites

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32

Mites pathology

85% of asthma sufferers are allergic to free-living dust mites, irritation and traumatic lesions caused during feeding, mange, cutaneous hypersensitivity, anemia

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33

mites intermediate host

tapeworms of cattle, sheep, horses

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34

mites life cycle

parasitic mites spend their entire lives on the host, mostly ectoparasitic, 1-3 nymph stages

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35

mites transmission

direct contact between hosts

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36

mites seasonal

winter is a problem because of animals huddling together and kept in closer quarters

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37

classification of mites

burrowing or non-burrowing

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38

what are cigar shaped and cause mange

demodex folliculorum

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39

Free-living mites - Orbatida

morphology: beetle like

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40

habitat: soil and vegetation on pastures

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41

transmission: ingested

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42

hosts: sheep and other grazing animals

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43

intermediate hosts: cestodes, Moniezia and Anoplocephala

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44

diagnosis of Non-burrowing mites

skin scraping at the edge of the lesion or serum ELISA

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45

Non-burrowing mites pathology

dermatitis

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46

Non-burrowing mites morphology

oval body, long legs

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47

Non-burrowing mites transmission

direct contact, indirect via scratching

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48

Non-burrowing mites feeding

skin scales and tissue, superficial blood sucking

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49

what is the most common mange in cattle, can survive off hosts

Chorioptes

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50

what is the common ear mite

Otodectes Cynotis

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51

Otodectes Cynotis ear mites hosts

dogs, cats, foxes

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52

Otodectes Cynotis morpholoyg

unsegmented pedicle

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53

Otodectes Cynotis predilection site

deep ear canal

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54

Otodectes Cynotis clinical signs

grey to black exudate with crusts

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55

Otodectes Cynotis pathology

hematoma, head shaking, pruritis, secondary bacterial infection

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56

Raillietia ear mites hosts

cattle and goats

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57

Raillietia pathology

blockage of auditory canal, inflammation, hearing loss

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58

Diagnosis of ear mites

dark debris, moving white specks on otoscope

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59

Dermanyssidae non-burrowing mites

Pneumonyssoides caninum

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60

Dermanyssus gallinae

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61

Ornithonyssus sylviarum

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62

Pneumonyssoides caninum

canine nasal mite

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63

Pneumonyssoides caninum morphology

oval, pale yellow

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64

Pneumonyssoides caninum clinical signs

head shaking, inverted sneezing, nasal sections

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65

Dermanyssus gallinae non burrowing mite

red mite of poultry or pigeon mite

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66

Dermanyssus gallinae morphology

large, elongated chelicerae and stylet like piercing mouthparts, greyish white, but red when engorged

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67

Dermanyssus gallinae

not a permanent ectoparasite

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68

only one which punctures skin

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69

zoonotic

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70

Dermanyssus gallinae feeding

larvae dont feed, nymphs feed and fall off, can live for 8 months without feeding

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71

Ornithonyssus sylviarum

Northern fowl mite

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72

abundant in US

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73

main ectoparasite of laying birds

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74

Trombiclidae non-burrowing mite

mostly free living with some parasitic adaptations

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75

morpholoyg; orange-red

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76

seasonal: late summer, early autumn

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77

habitat: grain storage areas

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78

predilection site: ears, eyes, toes (in humans= feet)

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79

parasitic: only larval stages

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80

hosts: not host specific, dogs, cats, birds, rabbits zoonotic

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81

Burrowing mites

morphology: small round short legs

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82

Sarcoptidae (Sarcoptes, Notoedres, Trixacarus, Kneidocoptes)

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83

Demodicidae (Demodex)

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84

Sarcoptidae Sarcoptes scab mite, scabies

morphology: numerous transverse ridges and triangular scales on dorsum

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85

hosts; all domestic animals except cats and guinea pigs, zoonotic

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86

predilection site: stratum coleum of skin, all development within burrows in skin, dogs=ears, muzzle, face, elbows, pigs=ears

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87

feeding: pierce skin to suck lymph, epidermal cells

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88

pathology: inflammation, exudate, crusts, alopecia, allergic reaction to feces, molts, saliva, death in wildlife, papular eruptions in humans, strong sour odors

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89

diagnosis: skin scrape with some bleeding in paraffin oil

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90

Sarcoptidae Notroedes cati

cat scabies

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91

morphology: thumbprint like striations on dorsum

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92

predilection site: skin of face, neck and ears

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93

Sarcoptidae Knemidocoptes

poultry scabies only burrowing mite of birds

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94

morphology: stalked pulvilli in males, no spines or scales, legs do not go past body

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95

pathology: scaly leg (mutans), Deplumbing itch (gallinae, burrow in hair shaft), tassel foot and scaly face/beak (pilae, non feathered parts)

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96

Demodex burrowing mite

demodectic or follicular mange

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97

Demodex burrowing mite morphology

small, elongated cigar shaped

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98

not contagious

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99

transmission: mom to baby during suckling

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100

predilection site: hair follicles, sebaceous glands

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