Difference between revisions of "Thelazia lacrymalis"

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==== General ====
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==Hosts==
*Eye worm, ''T. lacrymalis''.
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'''Intermediate hosts''': Muscid flies.
*Spiruroid nematode (1-2cm long).
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*Conjunctival sac, inner aspect of third eyelid.
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'''Definitive hosts''': Horses.
*Quite common (up to 30% UK horses).
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*Non-pathogenic.
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==Identification==
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The adults are small, at only 1-2cm in length, and are a pale yellow colour.
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==Life Cycle==
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The female worms are viviparous.  L1 is passed by the female worm, and is ingested by the fly, acting as the intermediate host.  The L1 develop into L2, then into L3 inside the ovarian follicles of the fly.  The fly infects the definitive host, whilst feeding.
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The prepatent period of ''T. lacrymalis'' is 3-6 weeks.
  
==== Life-Cycle ====
 
*Indirect LC; nuisance flies, [[Musca spp.|''Musca'' species]].
 
 
[[Category:Spiruroidea]]
 
[[Category:Spiruroidea]]
 
[[Category:Horse_Nematodes]]
 
[[Category:Horse_Nematodes]]
 
[[Category:To_Do_-_Max]]
 
[[Category:To_Do_-_Max]]

Revision as of 19:22, 20 July 2010



Also known as: Equine eye worm

Scientific Classification

Class Nematoda
Superfamily Spiruroidea

Hosts

Intermediate hosts: Muscid flies.

Definitive hosts: Horses.

Identification

The adults are small, at only 1-2cm in length, and are a pale yellow colour.

Life Cycle

The female worms are viviparous. L1 is passed by the female worm, and is ingested by the fly, acting as the intermediate host. The L1 develop into L2, then into L3 inside the ovarian follicles of the fly. The fly infects the definitive host, whilst feeding.

The prepatent period of T. lacrymalis is 3-6 weeks.