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Created page with '=== ''OXYURIS EQUI'' === ==== General ==== *Pinworm; caecum; large intestine; rectum. *Very common. ==== Morphology ==== *Female worms, <10cm long, white, long pointed tail. *Ma…'
=== ''OXYURIS EQUI'' ===
==== General ====
*Pinworm; caecum; large intestine; rectum.
*Very common.
==== Morphology ====
*Female worms, <10cm long, white, long pointed tail.
*Male worms, <1cm (difficult to see).
==== Life-Cycle ====
*Adults in lumen of colon.
*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.
*Prepatent period = 5months.
==== Pathogenicity ====
*Larvae (L4) - feed on colon mucosa, nip off epithelium, not true plug-feeders (erosions).
*Adults - non-pathogenic, feed on gut contents; but egg-laying activity of female worms irritant (''pruritis ani''), broken hair and bare patches over rump and tail head (seat itch).
==== Diagnosis ====
*Clinical signs.
*Egg streaks on perianal hair (sample using sellotape, place on slide).
*Faeces on gound (adult female worms).
==== Control ====
*Regular anthelmintic treatment.
*Sponge perianal region frequently when clinical signs present (scald sponge after).[[Category:Oxyuroidea]]
==== General ====
*Pinworm; caecum; large intestine; rectum.
*Very common.
==== Morphology ====
*Female worms, <10cm long, white, long pointed tail.
*Male worms, <1cm (difficult to see).
==== Life-Cycle ====
*Adults in lumen of colon.
*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.
*Prepatent period = 5months.
==== Pathogenicity ====
*Larvae (L4) - feed on colon mucosa, nip off epithelium, not true plug-feeders (erosions).
*Adults - non-pathogenic, feed on gut contents; but egg-laying activity of female worms irritant (''pruritis ani''), broken hair and bare patches over rump and tail head (seat itch).
==== Diagnosis ====
*Clinical signs.
*Egg streaks on perianal hair (sample using sellotape, place on slide).
*Faeces on gound (adult female worms).
==== Control ====
*Regular anthelmintic treatment.
*Sponge perianal region frequently when clinical signs present (scald sponge after).[[Category:Oxyuroidea]]