Exercise 14: Equine Strongyles (Palisade worms, Red worms) Flashcards
The strongylids of horses are parasites of the
Large intestine (cecum and colon)
Large stronglyes
Strongylus equinus
Strongylus edentatus
Strongylus vulgaris
Presence of a large dorsal tooth with bifid tip and two smaller subventral teeth
Strongylus equinus
Presence of ear-shaped dorsal teeth
Strongylus vulgaris
Absence of teeth
Strongylus edentatus
Anterior end of Strongylids
Truncated (shortened)
Have stout rigid body
Strongylus
Buccal capsule in strongylus
Well developed buccal capsule
Structure in the mouth characteristic of this parasite
Lateral leaf crowns around the mouth
Dorsal gutter
Males spicules
Long slender
Other genera of equine strongylids
Triodontophorus
Cyclicodontophorus
Cyclicocylus
Gyalocephalus
Buccal capsule subglobular, wider than deep and has 3 pairs of teeth at its base
Triodontophorus
Elements of the external leaf crown are shorter, narrower and more numerous that elements of the internal leaf crown
Cyclicodontophorus
The buccal capsule has ringlike hoop-shaped thickening of the posterior margin
Cyclicocyclus
The anterior end of the esophagus is greatly dilated, with 3 large sickle-shaped teeth
Gyalocephalus
Occurs in perirenal fat, renal pelvis and walls of the ureters of swine
Stephanurus dentatus
Stephanurus dentatus aka
Kidney worm of swine
Stephanurus dentatus: Larval stages occur in the _____ and other organs including the ______
Liver
Spinal canal
Note the stout and transparent body in situ
Stephanurus
Epaulettes, leaf crowns and teeth
Strongylids
Eggs are passed in urine. These are strongyle in type
S. dentatus
