strongyles:
·         Members of this genus live in the large intestine of horses and donkeys and, with Triodontophorus, are commonly known as the large strongyles.

Species
Hosts
Location
Distribution
Strongylus vulgaris
S. edentatus
S. equinus
Horses and donkeys
Caecum and colon
Worldwide

Identification:
Gross:
·         Robust dark red worms which are easily seen against the intestinal mucosa.
·         The well developed buccal cap­sule of the adult parasite is prominent as is the bursa of the male.
Microscopic:
·         Species differentiation is based on size and the pres­ence and shape of the teeth in the base of the buccal capsule.


Species
Length
Identification
Strongylus vulgaris
1.5-2.5cm
Two ear-shaped rounded teeth
S. edentates
2.5-4.5 cm
No teeth
S. equines
2.5-5.0cm
Three conical teeth. One is situated dorsally and is larger than the others and bifid
Fig: S. vulgaris

 
Fig: S. edentatus;

 
Fig: S. equinus

 






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