Midterm III - Helminthology 1 [INCOMPLETE] Flashcards Preview

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Flashcards in Midterm III - Helminthology 1 [INCOMPLETE] Deck (170)
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1

Trematoda: Egg 

2

Trematoda: Miracidium inside the egg

3

Trematoda: Miracidium (released from egg)

4

Trematoda: Miracidia

5

Trematoda: Sporocyst

6

Trematoda: Sporocyst containing rediae

7

Trematoda: Sporocyst containing rediae

8

Trematoda: Redia

9

Trematoda: Cercaria

10

Trematoda: Cercaria

11

Trematoda: Full cercaria

Typical form of the blood flukes

12

[White spheres]

Trematoda: Metacercariae

13

Trematoda: Metacercaria

14

Trematoda: Metacercariae

15

Trematoda: Metacercaria

Notice the sucker in the middle

16

Trematoda: Migrant form of a young fluke

17

Fasciola hepatica (Common liver fluke)

Acute fasciolosis: Haemorrhages on serosa

18

Fasciola hepatica (Common liver fluke)

Haemorrhagic tracks in a sheep's liver

19

Fasciola hepatica (Common liver fluke)

Haemorrhagic tracks in a sheep's liver

20

Fasciola hepatica (Common liver fluke)

Chronic fasciolosis → Flukes are found in the bile duct

21

Fasciola hepatica (Common liver fluke)

Identifying features:

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

22

Fasciola hepatica (Common liver fluke)

Identifying features:

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

[See the yellow eggs]

23

Fasciola hepatica (Common liver fluke)

Identifying features:

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

[Notice the yellow eggs]

24

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Parenchyma with dark intestinal cross-sections

25

Fasciola hepatica (Common liver fluke)

Identifying features:

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

26

*MIDTERM*

*Fasciola hepatica (Common liver fluke)*

Identifying features:

  • Digested blood in the intestine = Liver fluke

27

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Cross-section showing intestine with digested blood

28

Fasciola hepatica (Common liver fluke) [Liver necropsy]

Identifying features:

  • Chronic stage: Enlarged & fibrotic lesions

29

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Enlarged gall bladder & bile duct

30

Fasciola hepatica (Common liver fluke)

Identifying features:

  • Enlarged bile duct wall

31

Chronic fasciolosis clinical sign:

  • Submandibular oedema

32

Preserved eggs of liver fluke

  • Detected using sedimentation

33

Radix labiata

Occasional host of Fasciola

34

Galba truncatula

Most common host for Fasciola & Calicophoron spp.

35

Galba truncatula

Infected with Fasciola larvae

36

Fascioloides magna (Great American liver fluke)

Identifying features:

  • Dark areas are intestines with digested blood

37

Fascioloides magna (Great American liver fluke)

Caverns in the liver of a Red Deer

38

Fascioloides magna (Great American liver fluke)

Mass of eggs in the liver

39

Fascioloides magna (Great American liver fluke)

Mass of eggs in the liver

40

Rumen fluke

Either Paramphistomum or Calicophoron spp.

41

Rumen fluke

Either Paramphistomum or Calicophoron spp.

42

Rumen fluke

Either Paramphistomum or Calicophoron spp.

  • 1 large ventral sucker; 1 smaller oral sucker

43

Rumen fluke

Either Paramphistomum or Calicophoron spp.

Identifying features:

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

44

Rumen fluke [Oral end]

Either Paramphistomum or Calicophoron spp.

45

Rumen fluke [Ventral end]

Either Paramphistomum or Calicophoron spp.

Sucker is visible

46

Rumen fluke

Either Paramphistomum or Calicophoron spp.

47

Rumen fluke [Ventral end] Cross section

Either Paramphistomum or Calicophoron spp.

48

Rumen fluke [Oral end]

Either Paramphistomum or Calicophoron spp.

49

Rumen fluke [Ventral end]

Either Paramphistomum or Calicophoron spp.

50

Planorbid snail

Intermediate host for Paramhistomum spp.

51

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

52

Developing rumen flukes on the abomasal wall

53

Rumen fluke [Ventral end]

Either Paramphistomum or Calicophoron spp.

54

Rumen fluke [Among ruminal papillae]

Either Paramphistomum or Calicophoron spp.

55

Rumen fluke [Among ruminal papillae]

Either Paramphistomum or Calicophoron spp.

56

Rumen fluke: Non-embryonated egg

Either Paramphistomum or Calicophoron spp.

57

Dicrocoelium dendriticum (Lancet fluke)

 

58

Dicrocoelium dendriticum (Lancet fluke)

59

Dicrocoelium dendriticum (Lancet fluke)

 

 

60

Dicrocoelium dendriticum (Lancet fluke)

 

61

Uterus w/ eggs

62

Vitellaria

63

Testes

64

Oral sucker

65

Ventral sucker

66

Dicrocoelium dendriticum (Lancet fluke): Egg

Hard & thick shell - Detect with floatation

 

67

Dicrocoelium dendriticum (Lancet fluke): Eggs

 

 

68

Landsnail: Intermediate host of:

Dicrocoelium dendriticum (Lancet fluke)

 

 

69

Dicrocoelium dendriticum (Lancet fluke): Cercaria

Found in slime balls on grass

 

 

70

Dicrocoelium dendriticum (Lancet fluke): Metacercaria

 

 

71

Dicrocoelium dendriticum (Lancet fluke)

Chronic dicrocoeliasis: Thickened bile ducts

 

 

72

Dicrocoelium dendriticum (Lancet fluke)

Chronic dicrocoeliasis: Thickened bile ducts

 

 

73

Dicrocoelium dendriticum (Lancet fluke)

This can be identified by:

  •  Presence of eggs

 

 

74

Dicrocoelium dendriticum (Lancet fluke)

This can be identified by:

  •  Presence of eggs

 

 

75

Dicrocoelium dendriticum (Lancet fluke)

This can be identified by:

  •  Presence of eggs

 

 

76

How to distinguish between Liver fluke and Lancet fluke?

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

77

Fasciola hepatica (Common liver fluke) [Liver necropsy]

Chronic fasciolosis: Adult flukes in the bile duct

78

Moniezia benedeni

Identifying features:

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

79

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

Moniezia benedeni: Egg

Identifying features:

  • Quadrangular egg shape
  • Oncosphaera is eccentric

81

Moniezia expansa: Egg

Identifying features:

  • Triangular egg shape
  • Oncosphaera is central

82

Anoplocephala perfoliata: Egg

Identifying features:

  • Semicircular shape
  • Contains 6 hooked oncosphera inside

83

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

Dipylidium spp.: Cocoon

Identifying features:

  • Oncospheres fill the centre

85

Diphyllobothrium latum (Broad/fish tapeworm): Scolex

Identifying features:

  • Longitudinal, oval slit (Bothridium)

86

Diphyllobothrium latum (Broad/fish tapeworm): Proglottids

Identifying features:

  • 1 set of genitalia
  • Genital openings in the midline

87

Diphyllobothrium spp: Eggs

Identifying features:

  • Resemble the features of Trematode eggs
  • No oncosphera

88

Taenia spp.: Rostellum

Identifying features:

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

89

Taenia spp.: Proglottids

Identifying features:

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

90

Taenia spp.: Mature segment

Identifying features:

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

91

Taenia spp.: Gravid segment

Identifying features:

  • Branches of uterus are filled with white eggs

92

Taenia spp.: Egg

Identifying features:

  • Thick refractive eggshell
  • Six-hooked oncosphere (not all hooks are visible)
  • Colour: White-brown

93

Taenia spp.: Cysticercus larva

Liver tissue

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

94

Taenia spp.: Cysticerci

Cut surface of skeletal muscle

95

Taenia multiceps: Coenurus larva

White solices can be seen on the opened wall

96

Echinococcus granulosus: Adult

Identifying features:

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

97

Echinococcus hyatidosus

Identifying features:

  • Spherical protoscolices attached to the wall of inner broad capsules

98

Echinococcus granulosus: Protoscolex

  • No. hooks on protoscolex = no. hooks of the adult's scolex

99

Echinococcus multilocularis: Cavernous structure

Sterile larva not containing any protosolices

100

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

  • Cysticercus pisiformis: Lesions appear "on" the liver
  • Eccinococcus interlocularis: Lesions appear inside the liver

101

Dipylidium caninum

102

Dipylidium caninum: Dried segments

103

Anoplocephala perfoliata

104

Moniezia expansa

105

Mesocestoides spp.

106

Anoplocephala perfoliata: Worm

107

Moniezia expansa

108

Dipylidium caninum

109

Anocephala perfoliata

110

Cysticercus bovis

111

Cysticercus cellulosae

112

Cysticercus pisiformis

Note the lesions appear "on" the liver

113

(Taenia) Cysticercus pisiformis: Rostellum

114

Mesocestoides lineatus

115

Cysticercus tenuicollis: On a liver

116

Taenia pisiformis: Gravid segment

117

Cysticercosis in the rabbit's liver

118

Taenia saginata: Egg

119

Cysticercus: Heart muscle

120

Taenia pisiformisGravid proglottids

121

Taenia pisiformis?: Haemorrhagic tracks in the liver

122

Mesocestoides lineatus: Segment

123

Mature cysticerci on the peritoneal surface

124

Cysticercus?: In the heart muscle

125

Cysticercus cervi

126

Cysticerci pisiformis: Rabbit liver

127

Echinococcus multilocularis larva: Echinococcus alveolaris

128

Taenia-type eggs

129

Echinococcus multilocularis?: Hyatid cyst

with protoscolices inside

130

Echinococcus granulosus: Protoscolex

131

Echinococcosis interlocularis

Note the cysts are in the liver

132

Echinococcus hydatidosus

Liver sample

133

(Taenia) Cysticercus crassiceps

134

Echinococcus hyatidosus: Larvae

135

Cysticercus longicollis: Larva

136

Echinococcus granulosus: Cyst

137

Cysticercus tenuicollis: Larvae

138

(Taenia) Coenurus serialis: Larva

Muscle of Hare

139

Echinococcus: Cysts

140

Taenia serialis

141

Taenia solium: Cisticerci 

Heart sample

142

Taenia spp.: Cysticercus

143

Taenia serialis

144

Echinococcus: Hydatid cyst (liver)

145

Taenia multiceps

146

Taenia saginata: Cysticercus bovis

147

Taenia hydatigena

148

Taenia multiceps: Coenurus larvae

149

Taenia hydatigena: Cysticerci

150

Taenia saginata: Worm & Larva

151

Taenia spp.

152

Taenia pisiformis

153

Taenia pisiformis

154

Taenia pisiformis: Gravid segment

155

Taenia pisiformis: Eggs

156

Taenia saginata: Eggs

157

Cysticercus tenuicollis

(Taenia hydatigena larval form)

158

Strobilocercus fasciolaris

(Taenis taeniaeformis larval form)

159

Cysticercus bovis

160

Cysticercus larvae in the brain

161

Cysticercus longicollis

(Taenia crassiceps larval form)

162

Coenurus cerebralis

(Taenia multiceps larval form)

163

Coenurus serialis

(Taenia serialis larval form)

Found in CT & muscles

164

Echinococcus granulosus

165

Echinococcus granulosus

166

Cysticercus pisiformis

(Taenia pisiformis larval form)

167

Cysticercus cellulosae

(Taenia solium larval form)

168

Taenia pisiformis

169

Taenia serialis

170

Cysticercus tenuicollis

(Taenia hydatigena larval form)