Midterm III - Helminthology 1 [INCOMPLETE] Flashcards
Trematoda: Egg
Trematoda: Miracidium inside the egg
Trematoda: Miracidium (released from egg)
Trematoda: Miracidia
Trematoda: Sporocyst
Trematoda: Sporocyst containing rediae
Trematoda: Sporocyst containing rediae
Trematoda: Redia
Trematoda: Cercaria
Trematoda: Cercaria
Trematoda: Full cercaria
Typical form of the blood flukes
[White spheres]
Trematoda: Metacercariae
Trematoda: Metacercaria
Trematoda: Metacercariae
Trematoda: Metacercaria
Notice the sucker in the middle
Trematoda: Migrant form of a young fluke
Fasciola hepatica (Common liver fluke)
Acute fasciolosis: Haemorrhages on serosa
Fasciola hepatica (Common liver fluke)
Haemorrhagic tracks in a sheep’s liver
Fasciola hepatica (Common liver fluke)
Haemorrhagic tracks in a sheep’s liver
Fasciola hepatica (Common liver fluke)
Chronic fasciolosis → Flukes are found in the bile duct
Fasciola hepatica (Common liver fluke)
Identifying features:
- Dorsoventrally flattened/Leaf-like
- Grey-brown
- Conical head shape (with shoulders)
Fasciola hepatica (Common liver fluke)
Identifying features:
- Dorsoventrally flattened/Leaf-like
- Grey-brown
- Conical head shape (with shoulders)
[See the yellow eggs]
Fasciola hepatica (Common liver fluke)
Identifying features:
- Dorsoventrally flattened/Leaf-like
- Grey-brown
- Conical head shape (with shoulders)
[Notice the yellow eggs]
Fasciola hepatica (Common liver fluke)
Identifying features:
- Parenchyma with dark intestinal cross-sections
Fasciola hepatica (Common liver fluke)
Identifying features:
- Red spikes on the surface = Trematode
- Oral sucker visible in the centre
*MIDTERM*
*Fasciola hepatica (Common liver fluke)*
Identifying features:
- Digested blood in the intestine = Liver fluke
Fasciola hepatica (Common liver fluke)
Identifying features:
- Cross-section showing intestine with digested blood
Fasciola hepatica (Common liver fluke) [Liver necropsy]
Identifying features:
- Chronic stage: Enlarged & fibrotic lesions
Fasciola hepatica (Common liver fluke)
Identifying features:
- Enlarged gall bladder & bile duct
Fasciola hepatica (Common liver fluke)
Identifying features:
- Enlarged bile duct wall
Chronic fasciolosis clinical sign:
- Submandibular oedema
Preserved eggs of liver fluke
- Detected using sedimentation
Radix labiata
Occasional host of Fasciola
Galba truncatula
Most common host for Fasciola & Calicophoron spp.
Galba truncatula
Infected with Fasciola larvae
Fascioloides magna (Great American liver fluke)
Identifying features:
- Dark areas are intestines with digested blood
Fascioloides magna (Great American liver fluke)
Caverns in the liver of a Red Deer
Fascioloides magna (Great American liver fluke)
Mass of eggs in the liver
Fascioloides magna (Great American liver fluke)
Mass of eggs in the liver
Rumen fluke
Either Paramphistomum or Calicophoron spp.
Rumen fluke
Either Paramphistomum or Calicophoron spp.
Rumen fluke
Either Paramphistomum or Calicophoron spp.
- 1 large ventral sucker; 1 smaller oral sucker
Rumen fluke
Either Paramphistomum or Calicophoron spp.
Identifying features:
- 1 large ventral sucker
- 1 smaller oral sucker
- Genital opening in the centre
Rumen fluke [Oral end]
Either Paramphistomum or Calicophoron spp.
Rumen fluke [Ventral end]
Either Paramphistomum or Calicophoron spp.
Sucker is visible
Rumen fluke
Either Paramphistomum or Calicophoron spp.
Rumen fluke [Ventral end] Cross section
Either Paramphistomum or Calicophoron spp.
Rumen fluke [Oral end]
Either Paramphistomum or Calicophoron spp.
Rumen fluke [Ventral end]
Either Paramphistomum or Calicophoron spp.
Planorbid snail
Intermediate host for Paramhistomum spp.
Effect of young rumen flukes moving in the s. intestine mucosa
Developing rumen flukes on the abomasal wall
Rumen fluke [Ventral end]
Either Paramphistomum or Calicophoron spp.
Rumen fluke [Among ruminal papillae]
Either Paramphistomum or Calicophoron spp.
Rumen fluke [Among ruminal papillae]
Either Paramphistomum or Calicophoron spp.
Rumen fluke: Non-embryonated egg
Either Paramphistomum or Calicophoron spp.
Dicrocoelium dendriticum (Lancet fluke)
Dicrocoelium dendriticum (Lancet fluke)
Dicrocoelium dendriticum (Lancet fluke)
Dicrocoelium dendriticum (Lancet fluke)
Uterus w/ eggs
Vitellaria
Testes
Oral sucker
Ventral sucker
Dicrocoelium dendriticum (Lancet fluke): Egg
Hard & thick shell - Detect with floatation
Dicrocoelium dendriticum (Lancet fluke): Eggs
Landsnail: Intermediate host of:
Dicrocoelium dendriticum (Lancet fluke)