General Parasitology and Helminthology: Morphology

Morphology

MORPHOLOGY OF OESOPHAGOSTOMUM SP.

Species

O. columbianum
O. radiatum

Character

Cylindrical buccal capsule. Cervical groove, cephalic vesicle and cervical papillae are present.
Generally called as nodular worm.

*O.columbianum*	*O.radiatum*
Common name : Nodular worm of sheep and goat	Nodular worm of cattle
Location : Colon	Colon
Morphology: Worms are stout, white in color. 1 to 2 cm in length	Worms are stout, white in color. 1 to 2 cm in length
Cuticle forms a cone shaped mouth collar, which is fairly high and separated from the rest of the body.	Rounded mouth collar
Both external and internal leaf crown are present.	External leaf crown is absent
Possess large cervical alae, produces dorsal curvature of worm (anterior part)	Possess large cervical alae, produces dorsal curvature of worm (anterior part)
Cuticle anterior to cervical groove forms a vesicle known as “ cephalic vesicle ” which is slightly inflated.	Constriction at the middle of cephalic vesicle
A short distance behind the cervical groove a pair of “ cervical papillae ” is present	A short distance behind the cervical groove a pair of “cervical papillae” is present

Oseophagostomum radiatum

Last modified: Tuesday, 19 June 2012, 8:29 AM

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VPA 211: General Veterinary Parasitology and Helminthology (3+1)

Morphology

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