19. Cestodoses of ruminants Flashcards
(20 cards)
What is the order of cestodoses of ruminants?
Cyclophyllidida
Name a species of cestode that affects small ruminants.
Moniezia expansa
Name a species of cestode that affects large ruminants.
Moniezia benedeni
What is the size of Moniezia expansa?
6 m long
What is the size of Moniezia benedeni?
4 m long
What are the morphological features of the scolex of cestodes in ruminants?
- Four suckers
- NO rostellum with hooks
Where are the genital pores in cestodes of ruminants located in proglottids?
Both sides of proglottids
What is the life cycle starting point of cestodes of ruminants?
Eggs are shed in the feces
Cestodes of ruminants: What happens to the eggs after they are shed?
They adhere to vegetation or soil
What is the intermediate host for cestodes of ruminants?
Soil mites
Cestodes of ruminants: What stage do the eggs develop into inside the mites?
Cysticercoids
Pathogenesis of ruminant cestodes
- Heavy infection: Diarrhea, intestinal obstruction, enteritis, weakness, anorexia, nerve disorder
- younger more common
When are cestodoses typically seen in ruminants?
May & June
What is the treatment for cestodoses in ruminants?
Praziquantel
How can cestodoses be controlled in ruminants?
Alternating pastures
How can cestodoses of ruminanats be diagnosed?
Egg in feces, postmortem findings
Describe the eggs of the cestodes.
Medium, triangular shape, embryonated, 3 thick shells, transparent, with a pyriform apparatus inside
Location of ruminant cestodes
SI
Species of ruminant cestodes:
- Moniezia expansa – small ru
- Moniezia benedeni – large ru
- Thysaniezia giardi
- Avitellina centripunctata
- Stilesia globipunctata – stilesiosis in sheep
- Stilesia hepatica – in bile ducts
- Thysanosoma actinoides
Morphology of cestodes of ruminants
Scolex: four suckers
Genital pore: Both side of proglottids.
M. expansa – 6 m long have double set of genital organs – lambs
