Changes

=== ''OXYURIS EQUI'' ===

=== ''OXYURIS EQUI'' ===

==== General ====

====Introduction====

*Pinworm; caecum; large intestine; rectum.

'''Oxyuris equi is a pinworm, found specifically in horses.  It is seen relatively commonly, and its presence is often a result of poor worming protocol. caecum; large intestine; rectum.

 

==== Morphology ====

==== Morphology ====

==== Life-Cycle ====

==== Life-Cycle ====

*Adults in lumen of colon.

Both the male and female adults are fixed in lumen of colon, and the caecum. After fertilization, the female migrates towards the rectum. They then lay their sticky eggs in the perineal region.  After 4-5 days, the infective L3 develop.  (white streaks on hair; operculate eggs, 80-90µm, flattened on one side). The shell then crumbles and the L3 are released into the immediate environment.

*Female migrates to anus, lay eggs on perianal hair (white streaks on hair; operculate eggs, 80-90µm, flattened on one side).

 

*Eggs fall to ground, L3 develops inside egg, ingested, L3 invades colonic mucosa, emerges as L4 matures.

The horse then ingests the eggs containing the infective L3.  These then transform into L4, and then attach to the mucosa of the intestine, and the cycle continues.

*Prepatent period = 5months.

The Prepatent period for '''Oxyuris equi''' is 5months.

==== Pathogenicity ====

==== Pathogenicity ====