Difference between revisions of "Oxyuris equi"

From WikiVet English
Jump to navigation Jump to search
 
(20 intermediate revisions by 3 users not shown)
Line 1: Line 1:
=== ''OXYURIS EQUI'' ===
+
{{OpenPagesTop}}
====Introduction====
+
{{Taxobox
'''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.
+
|name              = ''Oxyuris equi
 +
|kingdom            =  
 +
|phylum            =  
 +
|class              = [[Nematodes|Nematoda]]
 +
|sub-class          =
 +
|order              =  
 +
|super-family      = [[Oxyuroidea]]
 +
|family            =  
 +
|sub-family        =
 +
|genus              =  
 +
|species            = ''Oxyuris equi
 +
}}
 +
Also known as: '''''Equine pinworm — Pinworm — Rat-tail
  
 +
==Introduction==
 +
''Oxyuris equi'' is a pinworm, of the superfamily [[Oxyuroidea]], and found specifically in horses.  It is seen relatively commonly, and its presence is often a result of poor worming protocol. It is found primarily in the caecum, large intestine and the rectum.
  
==== Morphology ====
+
==Identification==
*Female worms, <10cm long, white, long pointed tail.
+
The female worms are large, grey worms often greater than 10cm in length, with a long pointed tail.
*Male worms, <1cm (difficult to see).
+
The male worms are smaller, generally less than 1cm in length.
  
==== Life-Cycle ====
+
The ''O. equi'' eggs are ovoid, and yellow.  The egg shell is thick, and is slightly flattened on one side. They are 80-90µm in size.
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.
+
 
 +
==Life-Cycle==
 +
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.  The shell then crumbles and the L3 are released into the immediate environment.
  
 
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.
 
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.
The Prepatent period for '''Oxyuris equi''' is 5months.
+
The Prepatent period for '''Oxyuris equi''' is 5 months.
 +
 
 +
{{Learning
 +
|flashcards = [[Horse_Nematode_Flashcards|Horse Nematode Flashcards]]
 +
|literature search = [http://www.cabdirect.org/search.html?q=title%3A%28%22Oxyuris+equi%22%29 ''Oxyuris equi'' publications]
 +
|Vetstream = [https://www.vetstream.com/canis/search?s=nematode Nematodes]
 +
}}
 +
 
  
==== Pathogenicity ====
+
{{OpenPages}}
*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 (''pruritus 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 ====
+
[[Category:Oxyuroidea]]
*Regular anthelmintic treatment.
 
*Sponge perianal region frequently when clinical signs present (scald sponge after).[[Category:Oxyuroidea]]
 
 
[[Category:Horse_Nematodes]]
 
[[Category:Horse_Nematodes]]
[[Category:To_Do_-_Max]]
+
 
 +
[[Category:Expert_Review]]

Latest revision as of 17:49, 4 June 2016


Oxyuris equi
Class Nematoda
Super-family Oxyuroidea
Species Oxyuris equi

Also known as: Equine pinworm — Pinworm — Rat-tail

Introduction

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

Identification

The female worms are large, grey worms often greater than 10cm in length, with a long pointed tail. The male worms are smaller, generally less than 1cm in length.

The O. equi eggs are ovoid, and yellow. The egg shell is thick, and is slightly flattened on one side. They are 80-90µm in size.

Life-Cycle

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. The shell then crumbles and the L3 are released into the immediate environment.

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. The Prepatent period for Oxyuris equi is 5 months.


Oxyuris equi Learning Resources
VetstreamVetlexicon advert button.png
Vetstream
To reach the Vetstream content, please select
Canis, Felis, Lapis or Equis
FlashcardsFlashcards logo.png
Flashcards
Test your knowledge using flashcard type questions
Horse Nematode Flashcards
CABICABI logo.jpg
Literature Search
Search for recent publications via CAB Abstract
(CABI log in required)
Oxyuris equi publications




Error in widget FBRecommend: unable to write file /var/www/wikivet.net/extensions/Widgets/compiled_templates/wrt665c3ab8ab81e1_19037874
Error in widget google+: unable to write file /var/www/wikivet.net/extensions/Widgets/compiled_templates/wrt665c3ab8afb3b4_22284414
Error in widget TwitterTweet: unable to write file /var/www/wikivet.net/extensions/Widgets/compiled_templates/wrt665c3ab8b371d9_09892276
WikiVet® Introduction - Help WikiVet - Report a Problem