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Parasitology II > Photo ID > Flashcards

Photo ID Flashcards

1
Q

Bovine or Ovine Abomasum
20-35 mm

A

Haemonchus spp
- Male: spicules equal, asymmetric dorsal lobe of bursa
- Female: “Barber pole” if fresh specimen, vulvar flap

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2
Q

Bovine or Ovine Abomasum
6-12 mm

A

Ostertagia ostertagi
- Male: spicules equal

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3
Q

Bovine or Ovine Abomasum
5-8 mm

A

Trichostrongylus axei
- Male: spicules unequal in length
- Female: prominent ovejectors

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4
Q

Bovine or Ovine Abomasum

A

Strongyle
Hemonchus spp., Ostertagia ostertagi, Trichostrongylus axei

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5
Q

Bovine or ovine small intestine
5-8 mm

A

Trichostrongylus spp.
- Male: spicules equal
- Female: prominent ovejectors

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6
Q

Bovine or ovine small intestine
5-11 mm

A

Cooperia spp.
- Cephalic cuticular inflation
- Male: short spicules, large bursa

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7
Q

Bovine or ovine small intestine
8-25 mm

A

Nematodirus spp.
- cephalic cuticular inflation
- Male: long thin spicules

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8
Q

Bovine or ovine small intestine
12-26 mm

A

Bunostomum spp.
- large buccal capsule (hookworm)

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9
Q

Bovine or ovine small intestine
< 5 mm

A

Strongyloides papillosus
- Females: filariform pharynx 1/3rd of body length

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10
Q

Bovine or ovine small intestine

A

Strongyle
Trichostrongylus spp., Cooperia spp., Bunostomum spp.

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11
Q

Bovine or ovine small intestine
- 140 um, large foot-ball shaped eggs w/ extra space

A

Nematodirus spp.

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12
Q

Bovine or ovine small intestine
~ 50 um small, larvated eggs with a thin shell

A

Strongyloides papillosus

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13
Q

Bovine or ovine small intestine
many cm

A

Moniezia
- four suckers but no hooks; segments wider than long, each w/ 2 sets of reproductive organs

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14
Q

Bovine or ovine small intestine/ also in biliary system
many cm, with posterior fringe

A

Thysanosoma
- four suckers but no hooks; segments wider than long, each w/ 2 sets of reproductive organs, same as Moniezia but w/ posterior fringe on each segment

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15
Q

Bovine or ovine small intestine

A

Moniezia
- hexacanth larvae w/in pyriform apparatus

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16
Q

Bovine or ovine small intestine/ also in biliary system
- as for Moniezia but in packets

A

Thysanosoma

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17
Q

Bovine or ovine large intestine
8-21 mm

A

Oesophagostomum spp.
- anterior cuticular collar
Male: long spicule

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18
Q

Bovine or ovine large intestine
50-80 mm

A

Trichuris spp.
- whip-shaped

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19
Q

Ovine large intestine
10-20 mm

A

Chabertia ovina
- v large buccal capsule
- Male: long spicule

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20
Q

bovine & ovine large intestine

A

Strongyle
Oesophagostomum spp., Chabertia ovina (sheep)

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21
Q

yellow brown, lemon shaped eggs w/ bipolar plugs

A

Trichuris spp

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22
Q

Bovine & Ovine Liver & Biliary System
< 5 cm

A

Fasciola hepatica
- oral & ventral suckers, shoulders at level of ventral sucker

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23
Q

Bovine & Ovine Liver & Biliary System
< 10 cm

A

Fascioloides magna
- oral & ventral suckers, v large

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24
Q

Bovine & Ovine Liver & Biliary System
10-14 mm

A

Dicrocoelium dendriticum
- oral & ventral suckers, v small, may see eggs inside

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25
Q

Bovine & Ovine Liver & Biliary System
~140x75 um, operculate, thin-shelled, large, yellow eggs

A

Fasciola hepatica

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26
Q

Bovine & Ovine Liver & Biliary System
~140x85 um, operculate, thin-shelled, large, yellow eggs

A

Fascioloides magna
- same as Fasciola, but bigger

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27
Q

Bovine & Ovine Liver & Biliary System
~40 um, operculate, thick shelled, dark brown, small eggs

A

Dicrocoelium dendriticum

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28
Q
A

Dorsal spined larvae
- Muellerius in Ov & Cap
- Parelaphostrongylus spp. in wild cervids

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29
Q
A

Protostrongylus or spike tailed larvae
- Protostrongylus in bighorn and thinhorn sheep
- Orthostrongylus in wild cervids

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30
Q
A

Dictyocaulus larvae
- D. viviparous in cattle
- D. filaria in sheep

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31
Q

Bovine respiratory system
5-8 cm
- thin white nematodes in large airways
- larvae have granular appearance, blunt pointed tail

A

Dictyocaulus viviparus

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32
Q

Ovine respiratory system
5-8 cm
- thin white nematodes in large airways
- larvae have granular appearance, blunt pointed tail, pimple on mouth

A

Dictyocaulus filaria

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33
Q

Ovine & Caprine respiratory system
10-20 mm
- brown & white nematodes in nodules in lung parenchyma or airways
- larvae may have kinked tail w/ dorsal spine

A

Protostrongylids

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34
Q

Bovine & Ovine Skin
5-8 mm

A

Stephanofilaria stilesi
- small, spindle shaped nematodes in ventral midline

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35
Q

Bovine & Ovine Skin
- Microfilaria in skin

A

Stephanofilaria stilesi

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36
Q

Bovine & Ovine Peritoneal Cavity
up to 10 cm

A

Setaria spp.
- thin white nematodes in peritoneum

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37
Q

Bovine & Ovine Peritoneal Cavity
- ensheathed, microfilaria in blood

A

Setaria spp.

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38
Q

Bovine & Ovine Protozoan

A

Tritrichomonas foetus
Stage: Trophozoites
~25 um Pear shaped, three anterior flagellae

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39
Q

Bovine & Ovine Protozoan

A

Giardia spp
Stage: Trophozoites, Cysts
- Pear shape, 2 nuclei, & 4 flagellae
- ~12 um oval, central axis, & 4 nuclei

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40
Q

Bovine & Ovine Protozoan

A

Eimeria spp.
Stage: Oocysts
- 22-35 um, thin smooth shell, sporulated: 4 sporocysts w/ 2 sporozoites

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41
Q

Bovine & Ovine Protozoan

A

Cryptosporidium spp.
stage: oocysts
- round, oval, v. small (4 um). 4 sporozoites

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42
Q

Ovine Protozoan

A

Toxoplasma gondii
Stage: Tachyzoites (tissue) - crescent shape, central nucleus
Bradyzoites (tissue cycsts) - rount, thin-wall, nucleus posterior

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43
Q

Ovine Protozoan

A

Toxoplasma gondii
Stage: Oocysts (feces)
- 10 um, sporulated: 2 sporocysts w/ 4 sporozoites

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44
Q

Bovine Protozoan

A

Neospora caninum
Stage: Tachyzoites (tissue) - various shapes (round, cresent)
Bradyzoites (tissue cysts) - round, thick-walled

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45
Q

Bovine Protozoan

A

Neospora Caninum
Stage: oocysts (feces) - 7 um, sporulated: 2 sporocysts each w/ 4 sporozoites

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46
Q

Bovine & Ovine Protozoan

A

Sarcocystis spp.
stage: sporocysts - ~10-15 um, 4 sporozoites/sporocyst

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47
Q

Bovine & Ovine Protozoan

A

Sarcocystis spp.
Stage: Sarcocysts (tissue) - often oval, contain bradyzoites

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48
Q
A

Nematodirus spp, Thysanosoma spp, Fasciola hepatica, Fascioloides magna, Trichostrongyles (strongyle type egg)

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49
Q
A

Trichuris spp., Moniesia spp., [Strongyloides papillosus, Dicrocoelium dendriticum, Eimeria bovis, Eimeria zuernii]
-[seen at 10x but need 40x to confirm]

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50
Q
A

Giardia spp., Cryptosporidium spp.
(need 40x to see these)

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51
Q

Diagnostic characteristics of lice?

A

dorsoventrally flattened, 6 legs as adults

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52
Q

Diagnostic characteristics of sucking lice?

A

pointed head that is narrower than thorax

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53
Q

Diagnostic characteristics of biting lice?

A

broad head, wider than thorax

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54
Q

Bovine & Ovine Lice
- found on surface, haircoat

A

Lignognathus spp.
Sucking lice
- long-nosed, shorter length of 1st pair of legs

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55
Q

Bovine Lice
- found on surface, haircoat

A

Haematopinus spp.
sucking lice
- short-nosed, all legs same length

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56
Q

Bovine & Ovine Lice
- found on surface, haircoat

A

Damalinia spp.
Biting lice
- convex head

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57
Q

Diagnostic characteristics of mites?

A
  • dorsoventrally flattened, small, 8 legs as adults & nymphs, 6 as larvae
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58
Q

Bovine & Ovine mites
- found on surface, haircoat
- pedicel is long & jointed

A

Psoroptes
- long legs

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59
Q

Bovine & Ovine mites
- found on surface, haircoat
- pedicel is short & unjointed

A

Chorioptes
- long legs

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60
Q

Bovine & Ovine mites
- found burrowing in epidermis
- pedicel is long & unjointed

A

Sarcoptes
- short legs, posterior terminal anus

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61
Q

Bovine & Ovine mites
- found burrowing in hair follicles

A

Demodex
- short legs, cigar shape

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62
Q

Who’s pedicel is this?

A

Psoroptes

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63
Q

Who’s pedicel is this?

A

Sarcoptes

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64
Q

Who’s pedicel is this?

A

Chorioptes

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65
Q

Diagnostic characteristics of ticks?

A

Dorsoventrally flattened, large, 8 legs as adults & nymphs, 6 as larvae

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66
Q

Bovine & ovine ticks
- found on surface & in ears

A

Otobius megnini (spinose ear tick)
- soft tick
- ventral capitulum, no scutum, only larvae & nymphs are parasitic, spiny, fiddle shaped

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67
Q

Bovine & ovine ticks
- found on surface in haircoat

A

Dermacentor spp.
- Moose or winter tick, Rocky mountain wood tick, American dog tick
- ornate, festooned, short blunt capitulum, white splatter over scutum

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68
Q

Bovine & ovine ticks
- found on surface in haircoat

A

Amblyomma americanum
- lone star tick
- ornate, festooned, long parallel capitulum, female has single yellow dot on scutum, male has yellow streaks on festoons
- foreign to Canada

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69
Q

Bovine & ovine ticks
- found on surface in haircoat

A

Ixodes spp.
- black legged or deer ticks
- inornate, no festoons, long parallel capitulum, anal groove anterior to anus

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70
Q

Bovine & ovine ticks
- found on surface in haircoat

A

Haemaphysalis longicornis
- Asian long-horned tick
- inornate, festoons, short angled capitulum
- foreign to Canada

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71
Q

Name the structures

A

Scutum, eye, festoons

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72
Q

Structures on ventral male

A

Anal groove, anus

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73
Q

structure?

A

spiracle
- can be used to tell Dermacentor ticks apart

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74
Q

ID

A

Dermacentor veriablis

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75
Q

ID

A

Dermacentor andersoni

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76
Q

ID

A

circular spiracle of Dermacentor albipictus w/ few, large goblet cells

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77
Q

Diagnostic characteristics of flies?

A

6 legs as adults

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78
Q

Flies of Bovine & Ovine
4-6mm

A

Melophagus ovinus (keds)
Feeding fly
- wingless, brown, body covered w/ setae, terminal claws

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79
Q

Flies of Bovine & Ovine
1-4 mm

A

Culicoides (midges)
Feeding fly
- short, stout legs, long, filamentous, segmented antennae, thorax humped over a small head, wings typically mottled/pattened

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80
Q

Flies of Bovine & Ovine
1-5 mm

A

Simulian spp. (black fly)
feeding fly
- humped back, palps longer than proboscis, short multi-segmented antennae, wings typically clear

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81
Q

Flies of Bovine & Ovine
3.5-5 mm

A

Haematobia irritans (horn fly)
Feeding fly
- arista present, piercing mouthparts, two longitudinal dark stripes on thorax, long club-shaped palps

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82
Q

Flies of Bovine & Ovine
8 mm

A

Musca autumnalis (face fly)
Feeding fly
- arista present, non-piercing, sponge-like mouthparts (labella)

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83
Q

Flies of Bovine & Ovine
7-8 mm

A

Stomoxys calcitrans (stable fly)
Feeding fly
- arista present, piercing mouthparts, 4 longitudinal dark stripes on thorax, prominent forward projecting proboscis

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84
Q

Flies of Bovine
15 mm

A

Hypoderma spp. (warbles of cattle)
obligate myiasis fly
- no mouthparts, body covered in dense hairs, resemble bumblebee

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85
Q

Flies of Ovine
10-12 mm

A

Oestrus ovis (sheep nasal bot)
Obligate myiasis fly
- black spots on abdomen, broad head, mouthparts reduced to small knobs

86
Q

Flies of Bovine & Ovine
8-10 mm

A

Calliphoridae (blow fly)
Opportunistic myiasis fly
- metallic colouration (blue, green, copper, or black)

87
Q

Flies of Bovine & Ovine
10-13 mm

A

Sarcophagidae (Flesh fly)
Opportunistic myiasis fly
- thorax grey w/ dark, longitudinal stripes; abdomen checkered grey & black

88
Q

What is the importance of the Calliphoridae in Bo & Ov?

A

maggots (opportunistic myiasis)

89
Q

What is the importance of the Hypoderma spp. in Bo & Ov?

A
  • bots in spinal canal or esophagus (depending on spp.)
  • obligate myiasis
90
Q

What is the importance of the Simulium spp. in Bo & Ov?

A

IH for Onchocerca spp.

91
Q

What is the importance of Musca autumnalis in Bo & Ov?

A

IH for Thelazia & mechanical vector for bacterium Moraxella bovis (pink eye)

92
Q

What is the importance of the Haematobia irritans in Bo & Ov?

A
  • IH for Stephanofilaria & Setaria
  • major pest of cattle (back & sides)
93
Q

What is the importance of Stomoxys calcitrans?

A

IH for horse gastric nematodes: Habronema & Draschia

94
Q

What is the importance of Culicoides spp. in Bo & Ov?

A

biological vectors of orbiviruses (WTD, Bluetongue virus)

95
Q

Porcine stomach
< 8 mm

A

Hyostrongylus rubidus
- Males: prominent bursa & equal sized spicules

96
Q

Porcine stomach

A

Hyostrongylus rubidus
trichostrongyle

97
Q

Porcine Small Intestine
many cm

A

Ascaris suum
- 3 prominent lips

98
Q

Porcine Small Intestine
< 6 mm

A

Strongyloides ransomi (now Strongyloides Suis)
- only females parasitic, filariform pharynx

99
Q

Porcine Small Intestine
1-4 mm

A

Trichinella spiralis
- tiny nematodes, almost never seen, females 2-4 mm, males < 2mm

100
Q

Porcine small intestine
- ~50-70 um, thick, rough shell

A

Ascaris suum

101
Q

Porcine Small Intestine
- ~40-55 um, larvated eggs w/ thin shell

A

Strongyloides ransomi (now S. suis)

102
Q

Porcine Small Intestine
- larvae

A

Trichinella spiralis

103
Q

Porcine Large Intestine
50-80 mm

A

Trichuris suis
- typical whip shape

104
Q

Porcine Large Intestine
8-21 mm

A

Oesophagostomum
- Males: prominent bursa & long spicules
- anterior cuticular collar

105
Q

Porcine Large Intestine
- yellow-brown, lemon shaped eggs w/ bipolar plugs

A

Trichuris suis

106
Q

Porcine Large Intestine

A

Oesophagostomum
- trichostrongyle

107
Q

Porcine Respiratory
several cm

A

Metastrongylus spp.
- thin white nematodes in small airways
- Male: small bursa but v long spicules

108
Q

Porcine Respiratory
- ~51-63 um, larvated eggs w/ thick shell

A

Metastrongylus spp.

109
Q

Porcine muscle
- coiled larvae (100 um long) w/in nurse cell in muscle

A

Trichinella spiralis

110
Q

Porcine Muscle & Tissues
- cysticerci

A

Taenia solium

111
Q

Porcine lice
- found on surface in haircoat

A

Haematopinus suis
Sucking lice
- short-nosed, all legs same length

112
Q

Porcine Mites
- found burrowing in the epidermis

A

Sarcoptes scabiei var suis
- short legs, long unjointed pedicels, posterior terminal anus

113
Q

Porcine Fly
- rat tailed maggot

A

Erystalis tenex (hover fly)

114
Q

Porcine protozoa

A

Cystoisospora suis
Stage: Oocyst
- ~20 um, ellipsoidal, thin smooth shell, sporulated: 2 sporocysts w/ 4 sporozoites each

115
Q

Porcine protozoa

A

Eimeria spp.
Stage: Oocysts
- ~ 15-30 um, sporulated: 4 sporocysts w/ 2 sporozoites each

116
Q

Porcine protozoa

A

Cryptosporidium spp.
Stage: oocyst
- round, oval, v small (4 um), 3 sporozoites

117
Q

Porcine protozoa

A

Toxoplasma gondii
Stage: Tachyzoites (tissue & fluids)
- crescent shape, central nucleus

118
Q

Porcine Protozoa

A

Toxoplasma gondii
Stage: Bradyzoites (tissue cysts)
- round, thin wall, nucleus posterior

119
Q

Porcine Protozoa

A

Toxoplasma gondii
Stage: oocysts (feces)
- 10 um, sporulated: 2 sporocysts w/ 4 sporozoites

120
Q

Porcine Protozoa

A

Giardia spp.
Stage: Trophozoites
- pear shape, 2 nuclei, 4 flagellae

121
Q

Porcine Protozoa

A

Giardia spp.
Stage: cysts
- ~12 um oval, central axis, & 4 nuclei

122
Q

Porcine Protozoa

A

Balantidium coli (ciliate)
Stage: Trophozoites
- oval shape, v large size (~ 60 um), cilia, bean-shaped macronuclei (seen if stained)

123
Q

Porcine Protozoa

A

Balantidium coli (ciliate)
Stage: Cyst
- more round shape, v large (~ 60 um), no cilia, presence of cyst wall

124
Q

Porcine Floatation

A

Trichostrongyles, Trichuris, Ascaris, Metastrongylus, [Strongyloides ransomi, Cystoisospora suis]
[seen at 10x but need 40x to confirm]

125
Q

Poultry Small Intestine
many cm

A

Ascaridia galli
- prominent mouth w/ trilobed lips
- Male: tail pointed & curved

126
Q

Poultry Small Intestine & Crop
20-80 mm

A

Capillaria spp. (different sp in crop & small intestine)
- Male: single spicule & primative bursa
- Females: w/ characteristic eggs

127
Q

Poultry Small Intestine- thick, smooth shell, slightly convex side-walls, central morula, > 75 um

A

Ascaridia galli

128
Q

Poultry small intestine & crop
- lemon-shaped eggs w/ transparent bipolar plugs & thick shell

A

Capillaria spp.

129
Q

Poultry Large Intestine (cecum)
< 1.5 cm

A

Heterakis gallinarum
- white w/ elongated tail
- Male: have tail flaps (alae) & copulatory bursa w/ 2 unequal spicules

130
Q

Poultry Large Intestine (cecum)
- thick, smooth shell, central morula, smaller than Ascaridia < 75 um

A

Heterakis gallinarum

131
Q

Poultry Respiratory
6-20 mm

A

Syngamus trachea
- red worm, permanently copulating forming Y shape, large buccal capsule

132
Q

Poultry Respiratory
- bipolar plugs similar to Capillaria but w/ morula & thin walls

A

Syngamus trachea

133
Q

Poultry Small Intestine
< 4 mm

A

Davainea proglottina
- small w/ 4-7 segments, hooks on rostellum, suckers w/ spines

134
Q

Poultry Small Intestine
- hexacanth larva w/ hooks

A

Davainea proglottina

135
Q

Poultry Oviduct
7-9 mm

A

Prosthogonimus macrorchis
- flat, oval pear shape, suckers, pinkish

136
Q

Poultry Oviduct
- small & operculum

A

Prosthogonimus macrorchis

137
Q

Poultry Lice

A

Goniodes meleagris
Chewing lice
- brown colour, 3 mm, convex head

138
Q

Poultry Mites

A

Cnemidocoptes mutans
Burrowing mite
- short legs, round body

139
Q

Poultry Mite

A

Damanyssus gallinae (poultry red mite)
Surface mite
- anus posterior in anal plate. long legs, oval body

140
Q

Poultry Mite

A

Ornithonyssus sylvarium (Northern Fowl Mite)
Surface Mite
- anus anterior in anal plate. long legs, oval body

141
Q

Poultry Flea

A

Ceratophyllus gallinae
- pronotal combs but not genal combs

142
Q

Poultry Protozoa
- Intestine (kidneys in Geese)

A

Eimeria spp.
Type: Coccidian
Stage: Oocyst
- ~20-30 um, sporulated: 4 sporocysts w/ 2 sporozoites each

143
Q

Poultry Protozoan
- Intestine (some in respiratory tract)

A

Cryptosporidium spp.
Type: Coccidian
Stage: Oocysts
- round, oval, very small (4 um). 4 sporozoites

144
Q

Poultry Protozoa
- mouth & throat

A

Trichomonas gallinae
Type: Mucoflagellate
Stage: Trophozoite
- ~5-20 um, pear shaped, 4 free flagellates & 1 anterior flagella, undulating membrane & axostyle posterior end

145
Q

Poultry Protozoa
- Caecum then spreads to liver

A

Histomonas meleagridis
Type: Mucoflagellate
Stage: Trophozoite
- ~5-20 um, round shape

146
Q

Poultry Protozoan
- Caecum then spreads to liver

A

Histomonas meleagridis
Type: Mucoflagellate
Stage: Amoeboid
- Tiny, single-celled

147
Q

Poultry Floatation

A

Trichostrongylus tenuis, Capillaria spp, Raillietina spp., Choanotaenia spp., Echinuria spp., Tarameres spp.

148
Q

Poultry Floatation part 2

A

Echinostoma spp., Amidostomum spp., Syngamus trachea, Ascaridia galli, Heterakis gallinarum

149
Q

Equine Stomach
5-8 mm

A

Trichostrongylus axei
- Male: spicules unequal in length
- Female: prominent ovejectors

150
Q

Equine Stomach
< 35 mm

A

Habronema spp.
- characteristic pharynx w/ anterior muscular & posterior glandular zone, no anterior cuticular groove

151
Q

Equine Stomach
< 15 mm

A

Drascheia spp
- as above but smaller w/ anterior cuticular groove

152
Q

Equine stomach
- thin walled, oval, morulated

A

Trichostrongylus axei
Strongyle

153
Q

Equine Stomach
- small & larvated

A

Habronema spp. & Drascheia spp.

154
Q

Equine Small Intestine
many cm

A

Parascaris spp.
- large, white, prominent lips, no copulatory bursa

155
Q

Equine Small Intestine
< 5 mm

A

Strongyloides westeri
- only females parasitic, filariform pharynx occupying 1/3 of body

156
Q

Equine Small Intestine
- thick, rough shell

A

Parascaris spp.

157
Q

Equine Small Intestine
- small, larvated, thin shell

A

Strongyloides westeri

158
Q

Equine Small Intestine
< 8 cm

A

Anoplocephala perfoliata
- overall body triangular, scolex w/ 4 suckers & no hooks, lappets at junction of scolex & body

159
Q

Equine Small Intestine
several cm

A

Anoplocephala magna
- overall body ribbon-shaped, no lappets

160
Q

Equine Small Intestine
< 3 cm

A

Paranoplocephala mammillana
- small ribbon shaped, slit-like suckers, no lappets

161
Q

Equine Small Intestine
- 65-80 microns, hexacanth larva in pyriform apparatus

A

Anoplocephala perfoliata & Anoplocephala magna

162
Q

Equine Small Intestine
- 65-80 microns, hexacanth larva in pyriform apparatus, like A. perfoliata but more oval in form

A

Prananoplocephala mammillana

163
Q

Equine Large Intestine
< 20 mm

A

Strongylus vulgaris
- large buccal capsule w/ pr of rounded teeth at base

164
Q

Equine Large Intestine
< 50 mm

A

Strongylus equinus
- large buccal capsule w/ pr of pointed teeth & a large bifid tooth at the base

165
Q

Equine Large Intestine
50 mm

A

Strongylus edentatus
- large buccal capsule w/o teeth

166
Q

Equine Large Intestine
30 mm

A

Triodontophorus (large non-migratory strongyle)
- medium sized buccal capsule w/ 3 pointed teeth at base

167
Q

Equine Large Intestine
< 20 mm

A

Cyathistomins (small strongyles)
- small buccal capsule, no teeth

168
Q

Equine Large Intestine
< 10 cm

A

Oxyuris equi
- Female: white w/ long-pointed tail
- Male: rare
- bulb pharynx

169
Q

Equine Large Intestine

A

Strongylus vulgaris, Strongylus equinus, Strongylus edentatus, Triodontophorus, Cyathostomins

  • strongyle
170
Q

Equine Large Intestine
- oval, flattened on 1 side, operculate (pinworm)

A

Oxyuris equi

171
Q

Equine Respiratory
several cm

A

Dictyocaulus arnfieldi
- thin wht nematodes in large airways

172
Q

Equine Respiratory
- larvae, granular in appearance w/ stylet on tail

A

Dictyocaulus arnfieldi

173
Q

Equine Nuchal Ligament & Skin
several cm

A

Onchocerca cervicalis
- adult nematodes identified based on location

174
Q

Equine Nuchal Ligament & Skin
- microfilariae in dermis

A

Onchocerca cervicalis

175
Q

Equine Peritoneal Cavity
several cm

A

Setaria spp.
- thin white nematodes in peritoneal cavity

176
Q

Equine Peritoneal Cavity
- ensheathed microfilariae in blood

A

Setaria spp.

177
Q

Equine Lice
- found on the surface in haircoat

A

Haematopinus asini
Sucking Lice
- short-nosed, all legs same length, prominent segmented antennae on each side of head

178
Q

Equine Lice
- found on surface in haircoat

A

Werneckiella (Damalinia) Equi
- convex, blunt head w/ prominent, segmented antennae on each side

179
Q

Equine mites
- found on surface in haircoat
- long, jointed pedicel

A

Psoroptes
- long legs

180
Q

Equine Mites
- found on surface in haircoat
- short, unjointed pedicels

A

Chorioptes
- long legs

181
Q

Equine Mites
- found burrowing in epidermis

A

Sarcoptes
- short legs, long unjointed pedicels, posterior terminal anus

182
Q

Equine Mites
- found burrowing in hair follicles

A

Demodex
- short legs, cigar shape

183
Q

Equine Ticks
- found on surface & in ears

A

Otobius megnini (Spinose ear tick)
Soft tick
- ventral capitulum, no scutum, only larvae & nymphs parasitic, spiny, fiddle shaped

184
Q

Equine Ticks
- found on surface of haircoat

A

Dermacentor spp.
Dermacentor albipictus (moose or winter tick), Dermacentor andersoni (Rocky Mountain Wood Tick), Dermacentor variablis (American Dog Tick)
- onate, festooned, short blunt capitulum, splatter over scutum

185
Q

Equine Ticks
- found on surface in haircoat

A

Amblyomma americanum (Lone Star Tick)
- ornate, festooned, long parallel capitulum, Female has single yellow dog on scutum, male has yellow streaks on festoons
- foreign to Canada

186
Q

Equine Ticks
- found on surface in haircoat

A

Ixodes spp (Black legged or deer ticks)
- inornate, no festoons, long parallel capitulum, anal groove anterior to anus

187
Q

Equine Ticks
- on surface in haircoat

A

Haemaphysalis longicornis (Asian long-horned tick)
- inornate, festoons, short angled capitulum
- foreign to Canada

188
Q

Flies of Horses
11-15 mm

A

Gasterophilus spp (equine bot flies)
Obligate myiasis flies
- no mouthparts, body densely covered in yellow hairs w/ dark brown bands on abdomen, large ovipositor in female (elongated abdomen)

189
Q

Flies of horses
8-10 mm

A

Calliphoridae (Blow fly)
Opportunistic myasis flies
- metallic colouration (blue, green, copper, or black)

190
Q

Flies of Horses
10-13 mm

A

Sarcophagidae (Flesh flies)
Opportunistic myiasis fly
- thorax grey w/ dark, longitudinal stripes; abdomen checkered grey & black

191
Q

Flies of Horses
1-5 mm

A

Simulian spp. (black fly)
Blood feeding
- hump-backed, palps longer than probiscis, short multi-segmented antennae, wings typically clear/hyaline

192
Q

Flies of horses
1-4 mm

A

Culicoides (midges)
Blood feeding
- short, stout legs, long, filamentous, segmented antennae, thorax humped over a small head, wings typically mottled/patterned

193
Q

Flies of horses
7-8 m

A

Stomoxys calcitrans (stable fly)
blood feeding
- arista present, piercing mouthparts, 4 longitudinal dark stripes on thorax, prominent forward projecting proboscis

194
Q

Flies of horses
3-5 cm

A

Tabanids (Horse fly)
blood feeding
- arista absent, downward pointing piercing mouthparts, prominent eyes, often w/ band across eye

195
Q

Flies of horses
~12 mm

A

Mosquitoes (Culex, Aedes, Anopheles)
- thin, long-legged, 2-wing, insect, antenna 4x longer than its head

196
Q

What is the clinical importance of Calliphoridae to horses?

A

maggots (opportunistic myiasis)

197
Q

What is the clinical importance of Gasterophilus spp. to horses?

A

bots (location depending on sp.). obligate myiasis

198
Q

What is the clinical importance of Tabanids like horse fly to horses?

A

mechanical transmission of disease (Equine Infectious Anemia, Anthrax)

199
Q

What is the clinical importance of Mosquitoes to horses?

A

vectors of:
- WNV, WEEV, EEV (culex)
- setaria equina (nematode) from Aedes
- malaria (Anopheles)

200
Q

What is the clinical importance of Stomoxys calcitrans to horses?

A

IH for horse gastric nematodes: Habronema & D. raschia

201
Q

What is the clinical importance of Culicoides spp. to horses?

A

biological vectors of virus (vesicular stomatitis, African horse sickness) & Onchocerca

202
Q

Equine Protozoa

A

Eimeria leuckarti
Stage: Oocysts (feces)
- 80x40 um, large, brown, pear shaped

203
Q

Equine Protozoa

A

Cryptosporidium parvum
Stage: Oocysts (feces)
- round, oval, v. small (4 um), 4 sporozoites

204
Q

Equine Protozoa

A

Neospora hughesi
Stage: Tachyzoites (tissue & fluid)
- various shapes (round, crescent)

205
Q

Equine Protozoa

A

Neospora hughesi
Stage: Bradyzoites (tissue cyst)
- round, thick-walled

206
Q

Equine Protozoa

A

Sarcocystis fayeri (tissue) or Sarcocystis neurona (aberrant)
Stage: Sarcocysts (tissue)
- often oval, contain bradyzoites

207
Q

Equine Protozoa

A

Sarcocystis fayeri (tissue) or Sarcocystis neurona (aberrant)
Stage: Meronts (schizonts) or free merozoites (tissue)
- sarcocysts are v rare, usually crescent shaped merozoites free in tissues

208
Q

Equine Protozoa

A

Babesia caballi
Stage: Trophozoite
- ring inside erythrocyte

209
Q

Equine Protozoa

A

Babesia caballi OR Theileria equi
Stage: Merozoite
- Pyriform or cruciform inside erythrocyte

210
Q

Equine Protozoa

A

Theileria equi
Stage: Meront/schizont
- inside white cells

211
Q

Equine flotation

A

Parascaris spp., Oxyuris equi, [Strongylus spp, Cyathostomins]

[strongyle type egg, impossible to differentiate]

212
Q

Equine Floatation II

A

Eimeria leuckarti, Anoplocephalid spp., Paranoplocephala mamillana, Strongyloides westeri

Parasitology II (9 decks)

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