Difference between revisions of "Parascaris equorum"

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{{OpenPagesTop}}
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{{Taxobox
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|name              = ''Parascaris equorum
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|kingdom            =
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|phylum            =
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|class              = [[Nematodes|Nematoda]]
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|sub-class          =
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|order              =
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|super-family      = [[:Category:Ascaridoidea|Ascaridoidea]]
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|family            =
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|sub-family        =
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|genus              =
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|species            = ''Parascaris equorum
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}}
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==Introduction==
 
[[Image:Parascaris equorum.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum2.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum2.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum3.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum3.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum4.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
 
[[Image:Parascaris equorum4.jpg|thumb|right|150px|''Parascaris equorum'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
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''P. equorum'' is a [[Nematodes|nematode]] that primarily affects younger horses, usually under two years of age, as their immune response is not as developed as older horses. 
  
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{| cellpadding="10" cellspacing="0" border="1"
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Predilection site: '''Small intestine
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| Predilection site
 
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| Small intestine
 
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|-
 
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| Superfamily
 
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| Ascaridoidea
 
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|-
 
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|}
 
  
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====Introduction====
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==Hosts==
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''P. equorum'' is a nematode that primarily affects younger horses, usually under two years of age, as their immune response is not as developed as older horses.
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Horses and donkeys.
  
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====Identification====
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==Identification==
 
''P. equorum'' is a large stout nematode, with the female capable of growing up to 40cm in length.  The adults have a mouth surrounded by three large lips.  The egg is spherical, brown and has a thick outer shell.
 
''P. equorum'' is a large stout nematode, with the female capable of growing up to 40cm in length.  The adults have a mouth surrounded by three large lips.  The egg is spherical, brown and has a thick outer shell.
  
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==== Life-Cycle ====
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== Life-Cycle ==
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The adults live unattached in the small intestine.  In heavy infections, they may form large balls, which can cause intestinal obstruction.  Under optimal conditions L2 can develop in 14 days.  The host ingests the embryonated egg.  L2 larvae then pass through the intestinal wall, and transfrom into L3.  They then migrate to the liver via the hepatic portal vein, where they stay for around a week.  They then enter the vena cava and travel to the pulmonary alveoli, where they transform to L4.
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The adults live unattached in the small intestine.  In heavy infections, they may form large balls, which can cause intestinal obstruction.  Under optimal conditions L2 can develop in 14 days.  The host ingests the embryonated egg.  L2 larvae then pass through the intestinal wall, and transform into L3.  The larvae then migrate to the liver via the hepatic portal vein, where they stay for around a week.  They enter the vena cava and travel to the pulmonary alveoli, where they transform to L4.
  
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They then travel up bronchi to the trachea and are coughed up and swallowed.  They then return to the stomach and small intestine, where they mature into adults.
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The larvae travel up bronchi to the trachea and are coughed up and swallowed.  Finally they return to the stomach and small intestine, where they mature into adults.
  
 
The prepatent period of ''P. equorum'' is 10-16 weeks.
 
The prepatent period of ''P. equorum'' is 10-16 weeks.
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May cause [[Ascarid Impaction - Horse|'''Ascarid Impaction''']] in horses.
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{{Learning
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|flashcards = [[Horse_Nematode_Flashcards|Horse Nematode Flashcards]]
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|literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=%22Parascaris+equorum%22&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&x=32&y=11&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Parascaris equorum'' publications]
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|Vetstream = [https://www.vetstream.com/canis/search?s=nematode Nematodes]
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}}
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{{review}}
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{{OpenPages}}
  
 
[[Category:Ascaridoidea]][[Category:Horse_Nematodes]]
 
[[Category:Ascaridoidea]][[Category:Horse_Nematodes]]
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[[Category:To_Do_-_Max]]
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[[Category:Expert_Review]]
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[[Category:Respiratory Parasitic Infections]]

Latest revision as of 17:49, 4 June 2016


Parascaris equorum
Class Nematoda
Super-family Ascaridoidea
Species Parascaris equorum

Introduction

Parascaris equorum - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
Parascaris equorum - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
Parascaris equorum - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona
Parascaris equorum - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona

P. equorum is a nematode that primarily affects younger horses, usually under two years of age, as their immune response is not as developed as older horses.

Predilection site: Small intestine

Hosts

Horses and donkeys.

Identification

P. equorum is a large stout nematode, with the female capable of growing up to 40cm in length. The adults have a mouth surrounded by three large lips. The egg is spherical, brown and has a thick outer shell.

Life-Cycle

The adults live unattached in the small intestine. In heavy infections, they may form large balls, which can cause intestinal obstruction. Under optimal conditions L2 can develop in 14 days. The host ingests the embryonated egg. L2 larvae then pass through the intestinal wall, and transform into L3. The larvae then migrate to the liver via the hepatic portal vein, where they stay for around a week. They enter the vena cava and travel to the pulmonary alveoli, where they transform to L4.

The larvae travel up bronchi to the trachea and are coughed up and swallowed. Finally they return to the stomach and small intestine, where they mature into adults.

The prepatent period of P. equorum is 10-16 weeks.

May cause Ascarid Impaction in horses.


Parascaris equorum Learning Resources
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Vetstream
To reach the Vetstream content, please select 		Canis, Felis, Lapis or Equis
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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) 		Parascaris equorum publications



This article has been peer reviewed but is awaiting expert review. If you would like to help with this, please see more information about expert reviewing.



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