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Parasitology > Midterm III - Helminthology 1 [INCOMPLETE] > Flashcards

Midterm III - Helminthology 1 [INCOMPLETE] Flashcards

1
Q
A

Trematoda: Egg

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2
Q
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Trematoda: Miracidium inside the egg

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3
Q
A

Trematoda: Miracidium (released from egg)

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4
Q
A

Trematoda: Miracidia

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5
Q
A

Trematoda: Sporocyst

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6
Q
A

Trematoda: Sporocyst containing rediae

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7
Q
A

Trematoda: Sporocyst containing rediae

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8
Q
A

Trematoda: Redia

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9
Q
A

Trematoda: Cercaria

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10
Q
A

Trematoda: Cercaria

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11
Q
A

Trematoda: Full cercaria

Typical form of the blood flukes

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12
Q

[White spheres]

A

Trematoda: Metacercariae

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13
Q
A

Trematoda: Metacercaria

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14
Q
A

Trematoda: Metacercariae

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15
Q
A

Trematoda: Metacercaria

Notice the sucker in the middle

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16
Q
A

Trematoda: Migrant form of a young fluke

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17
Q
A

Fasciola hepatica (Common liver fluke)

Acute fasciolosis: Haemorrhages on serosa

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18
Q
A

Fasciola hepatica (Common liver fluke)

Haemorrhagic tracks in a sheep’s liver

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19
Q
A

Fasciola hepatica (Common liver fluke)

Haemorrhagic tracks in a sheep’s liver

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20
Q
A

Fasciola hepatica (Common liver fluke)

Chronic fasciolosis → Flukes are found in the bile duct

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21
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Dorsoventrally flattened/Leaf-like
  • Grey-brown
  • Conical head shape (with shoulders)
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22
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Dorsoventrally flattened/Leaf-like
  • Grey-brown
  • Conical head shape (with shoulders)

[See the yellow eggs]

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23
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Dorsoventrally flattened/Leaf-like
  • Grey-brown
  • Conical head shape (with shoulders)

[Notice the yellow eggs]

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24
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Parenchyma with dark intestinal cross-sections
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25
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Red spikes on the surface = Trematode
  • Oral sucker visible in the centre
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26
Q

*MIDTERM*

A

*Fasciola hepatica (Common liver fluke)*

Identifying features:

  • Digested blood in the intestine = Liver fluke
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27
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Cross-section showing intestine with digested blood
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28
Q
A

Fasciola hepatica (Common liver fluke) [Liver necropsy]

Identifying features:

  • Chronic stage: Enlarged & fibrotic lesions
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29
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Enlarged gall bladder & bile duct
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30
Q
A

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Enlarged bile duct wall
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31
Q
A

Chronic fasciolosis clinical sign:

  • Submandibular oedema
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32
Q
A

Preserved eggs of liver fluke

  • Detected using sedimentation
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33
Q
A

Radix labiata

Occasional host of Fasciola

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34
Q
A

Galba truncatula

Most common host for Fasciola & Calicophoron spp.

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35
Q
A

Galba truncatula

Infected with Fasciola larvae

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36
Q
A

Fascioloides magna (Great American liver fluke)

Identifying features:

  • Dark areas are intestines with digested blood
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37
Q
A

Fascioloides magna (Great American liver fluke)

Caverns in the liver of a Red Deer

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38
Q
A

Fascioloides magna (Great American liver fluke)

Mass of eggs in the liver

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39
Q
A

Fascioloides magna (Great American liver fluke)

Mass of eggs in the liver

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40
Q
A

Rumen fluke

Either Paramphistomum or Calicophoron spp.

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41
Q
A

Rumen fluke

Either Paramphistomum or Calicophoron spp.

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42
Q
A

Rumen fluke

Either Paramphistomum or Calicophoron spp.

  • 1 large ventral sucker; 1 smaller oral sucker
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43
Q
A

Rumen fluke

Either Paramphistomum or Calicophoron spp.

Identifying features:

  • 1 large ventral sucker
  • 1 smaller oral sucker
  • Genital opening in the centre
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44
Q
A

Rumen fluke [Oral end]

Either Paramphistomum or Calicophoron spp.

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45
Q
A

Rumen fluke [Ventral end]

Either Paramphistomum or Calicophoron spp.

Sucker is visible

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46
Q
A

Rumen fluke

Either Paramphistomum or Calicophoron spp.

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47
Q
A

Rumen fluke [Ventral end] Cross section

Either Paramphistomum or Calicophoron spp.

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48
Q
A

Rumen fluke [Oral end]

Either Paramphistomum or Calicophoron spp.

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49
Q
A

Rumen fluke [Ventral end]

Either Paramphistomum or Calicophoron spp.

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50
Q
A

Planorbid snail

Intermediate host for Paramhistomum spp.

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51
Q
A

Effect of young rumen flukes moving in the s. intestine mucosa

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52
Q
A

Developing rumen flukes on the abomasal wall

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53
Q
A

Rumen fluke [Ventral end]

Either Paramphistomum or Calicophoron spp.

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54
Q
A

Rumen fluke [Among ruminal papillae]

Either Paramphistomum or Calicophoron spp.

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55
Q
A

Rumen fluke [Among ruminal papillae]

Either Paramphistomum or Calicophoron spp.

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56
Q
A

Rumen fluke: Non-embryonated egg

Either Paramphistomum or Calicophoron spp.

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57
Q
A

Dicrocoelium dendriticum (Lancet fluke)

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58
Q
A

Dicrocoelium dendriticum (Lancet fluke)

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59
Q
A

Dicrocoelium dendriticum (Lancet fluke)

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60
Q
A

Dicrocoelium dendriticum (Lancet fluke)

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61
Q
A

Uterus w/ eggs

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62
Q
A

Vitellaria

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63
Q
A

Testes

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64
Q
A

Oral sucker

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65
Q
A

Ventral sucker

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66
Q
A

Dicrocoelium dendriticum (Lancet fluke): Egg

Hard & thick shell - Detect with floatation

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67
Q
A

Dicrocoelium dendriticum (Lancet fluke): Eggs

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68
Q
A

Landsnail: Intermediate host of:

Dicrocoelium dendriticum (Lancet fluke)

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69
Q
A

Dicrocoelium dendriticum (Lancet fluke): Cercaria

Found in slime balls on grass

70
Q
A

Dicrocoelium dendriticum (Lancet fluke): Metacercaria

71
Q
A

Dicrocoelium dendriticum (Lancet fluke)

Chronic dicrocoeliasis: Thickened bile ducts

72
Q
A

Dicrocoelium dendriticum (Lancet fluke)

Chronic dicrocoeliasis: Thickened bile ducts

73
Q
A

Dicrocoelium dendriticum (Lancet fluke)

This can be identified by:

  • Presence of eggs
74
Q
A

Dicrocoelium dendriticum (Lancet fluke)

This can be identified by:

  • Presence of eggs
75
Q
A

Dicrocoelium dendriticum (Lancet fluke)

This can be identified by:

  • Presence of eggs
76
Q

How to distinguish between Liver fluke and Lancet fluke?

A
  • Liver fluke: Visible digested blood in the intestine
  • Lancet fluke: Visible eggs present
77
Q
A

Fasciola hepatica (Common liver fluke) [Liver necropsy]

Chronic fasciolosis: Adult flukes in the bile duct

78
Q
A

Moniezia benedeni

Identifying features:

  • Each proglottis has 2 sets of genitals which open on both sides
79
Q
A

Anoplocephala perfoliata

Identifying features:

  • Each proglottis has 1 set of genitals which all open on the same side
  • Testicles are scattered as pale spots on the opposite side
80
Q
A

Moniezia benedeni: Egg

Identifying features:

  • Quadrangular egg shape
  • Oncosphaera is eccentric
81
Q
A

Moniezia expansa: Egg

Identifying features:

  • Triangular egg shape
  • Oncosphaera is central
82
Q
A

Anoplocephala perfoliata: Egg

Identifying features:

  • Semicircular shape
  • Contains 6 hooked oncosphera inside
83
Q
A

Dipylidium caninum (Flea/cucumber tapeworm): Mature segment

Identifying features:

  • Genital openings on both sides (impressions on the surface)
  • 2 x Ovaries in the centre
  • Testicles fill the central part of the proglottis
84
Q
A

Dipylidium spp.: Cocoon

Identifying features:

  • Oncospheres fill the centre
85
Q
A

Diphyllobothrium latum (Broad/fish tapeworm): Scolex

Identifying features:

  • Longitudinal, oval slit (Bothridium)
86
Q
A

Diphyllobothrium latum (Broad/fish tapeworm): Proglottids

Identifying features:

  • 1 set of genitalia
  • Genital openings in the midline
87
Q
A

Diphyllobothrium spp: Eggs

Identifying features:

  • Resemble the features of Trematode eggs
  • No oncosphera
88
Q
A

Taenia spp.: Rostellum

Identifying features:

  • Strong hooks on the rostellum [Ø T. saginata]
  • Impressions of 2 x suckers (acetabuli)
89
Q
A

Taenia spp.: Proglottids

Identifying features:

  • Genital organs open on each side indiscriminately
  • Proglottis are stretched to become longitudinally narrow
90
Q
A

Taenia spp.: Mature segment

Identifying features:

  • Mass of scattered testicles
  • 2 longitudinal excretory canals
  • 2 genital ducts parallel to the genital opening
91
Q
A

Taenia spp.: Gravid segment

Identifying features:

  • Branches of uterus are filled with white eggs
92
Q
A

Taenia spp.: Egg

Identifying features:

  • Thick refractive eggshell
  • Six-hooked oncosphere (not all hooks are visible)
  • Colour: White-brown
93
Q
A
  • Taenia spp.: Cysticercus* larva
  • Liver tissue*

You can tell it isn’t Echinococcus because there is no surrounding CT

94
Q
A

Taenia spp.: Cysticerci

Cut surface of skeletal muscle

95
Q
A

Taenia multiceps: Coenurus larva

White solices can be seen on the opened wall

96
Q
A

Echinococcus granulosus: Adult

Identifying features:

  • Scolex with a rostellum & suckers
  • Short neck
  • Immature segment & mature segment
  • Gravid segment
  • Centrally-aggregated eggs
97
Q
A

Echinococcus hyatidosus

Identifying features:

  • Spherical protoscolices attached to the wall of inner broad capsules
98
Q
A
  • Echinococcus granulosus*: Protoscolex
  • No. hooks on protoscolex = no. hooks of the adult’s scolex
99
Q
A

Echinococcus multilocularis: Cavernous structure

Sterile larva not containing any protosolices

100
Q

Difference between a Cysticercus pisiformis & an Eccinococcus interlocularis necropsy specimin.

A
  • Cysticercus pisiformis: Lesions appear “on” the liver
  • Eccinococcus interlocularis: Lesions appear inside the liver
101
Q
A

Dipylidium caninum

102
Q
A

Dipylidium caninum: Dried segments

103
Q
A

Anoplocephala perfoliata

104
Q
A

Moniezia expansa

105
Q
A

Mesocestoides spp.

106
Q
A

Anoplocephala perfoliata: Worm

107
Q
A

Moniezia expansa

108
Q
A

Dipylidium caninum

109
Q
A

Anocephala perfoliata

110
Q
A

Cysticercus bovis

111
Q
A

Cysticercus cellulosae

112
Q
A
  • Cysticercus pisiformis*
  • Note the lesions appear “*on” the liver
113
Q
A

(Taenia) Cysticercus pisiformis: Rostellum

114
Q
A

Mesocestoides lineatus

115
Q
A

Cysticercus tenuicollis: On a liver

116
Q
A

Taenia pisiformis: Gravid segment

117
Q
A

Cysticercosis in the rabbit’s liver

118
Q
A

Taenia saginata: Egg

119
Q
A

Cysticercus: Heart muscle

120
Q
A

Taenia pisiformis**: Gravid proglottids

121
Q
A

Taenia pisiformis?: Haemorrhagic tracks in the liver

122
Q
A

Mesocestoides lineatus: Segment

123
Q
A

Mature cysticerci on the peritoneal surface

124
Q
A

Cysticercus?: In the heart muscle

125
Q
A

Cysticercus cervi

126
Q
A

Cysticerci pisiformis: Rabbit liver

127
Q
A

Echinococcus multilocularis larva: Echinococcus alveolaris

128
Q
A

Taenia-type eggs

129
Q
A

Echinococcus multilocularis?: Hyatid cyst

with protoscolices inside

130
Q
A

Echinococcus granulosus: Protoscolex

131
Q
A

Echinococcosis interlocularis

Note the cysts are in the liver

132
Q
A

Echinococcus hydatidosus

Liver sample

133
Q
A

(Taenia) Cysticercus crassiceps

134
Q
A

Echinococcus hyatidosus: Larvae

135
Q
A

Cysticercus longicollis: Larva

136
Q
A

Echinococcus granulosus: Cyst

137
Q
A

Cysticercus tenuicollis: Larvae

138
Q
A

(Taenia) Coenurus serialis: Larva

Muscle of Hare

139
Q
A

Echinococcus: Cysts

140
Q
A

Taenia serialis

141
Q
A

Taenia solium: Cisticerci

Heart sample

142
Q
A

Taenia spp.: Cysticercus

143
Q
A

Taenia serialis

144
Q
A

Echinococcus: Hydatid cyst (liver)

145
Q
A

Taenia multiceps

146
Q
A

Taenia saginata: Cysticercus bovis

147
Q
A

Taenia hydatigena

148
Q
A

Taenia multiceps: Coenurus larvae

149
Q
A

Taenia hydatigena: Cysticerci

150
Q
A

Taenia saginata: Worm & Larva

151
Q
A

Taenia spp.

152
Q
A

Taenia pisiformis

153
Q
A

Taenia pisiformis

154
Q
A

Taenia pisiformis: Gravid segment

155
Q
A

Taenia pisiformis: Eggs

156
Q
A

Taenia saginata: Eggs

157
Q
A

Cysticercus tenuicollis

(Taenia hydatigena larval form)

158
Q
A

Strobilocercus fasciolaris

(Taenis taeniaeformis larval form)

159
Q
A

Cysticercus bovis

160
Q
A

Cysticercus larvae in the brain

161
Q
A
  • Cysticercus longicollis*
  • (Taenia crassiceps larval form)*
162
Q
A

Coenurus cerebralis

(Taenia multiceps larval form)

163
Q
A

Coenurus serialis

(Taenia serialis larval form)

Found in CT & muscles

164
Q
A

Echinococcus granulosus

165
Q
A

Echinococcus granulosus

166
Q
A

Cysticercus pisiformis

(Taenia pisiformis larval form)

167
Q
A
  • Cysticercus cellulosae*
  • (Taenia solium larval form)*
168
Q
A

Taenia pisiformis

169
Q
A

Taenia serialis

170
Q
A

Cysticercus tenuicollis

(Taenia hydatigena larval form)

Parasitology (4 decks)

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