Difference between revisions of "Parafilaria spp."

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{{unfinished}}
 
{{unfinished}}
  
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==== General ====
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=P. bovicola=
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*Filarial nematode (<6cm long).
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*Subcutaneous nodules and intermuscular connective tissue.
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{| cellpadding="10" cellspacing="0" border="1"
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*Found in warmer countries (Asia, Africa, Europe, South America; UK in imported horses only).
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| Also known as:
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| '''Summer bleeding disease.
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<br>
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'''Verminous nodules
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|-
 +
|}
 +
 
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===Scientific Classification===
 +
 
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{| cellpadding="10" cellspacing="0" border="1" 
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| Class
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| Nematoda
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|-
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| Superfamily
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| Filarioidea
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|}
 +
 
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==Hosts==
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'''Intermediate host''': Muscid flies.
 +
 
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'''Definitive host''': Cattle and buffalos.
 +
 
 +
==Identification==
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''P. bovicola'' are thin, white worms, ranging between 3-6cm in length.
 +
 
 +
==Life Cycle==
 +
The life cycle of ''P. bovicola'' is indirect. The eggs hatch on the surface of the host.  These eggs are ingested by the flies acting as intermediate hosts.  Larvae develop and transform into infective L3.  The flies then feed on the host, and the larvae are past onto the host.  The larvae then enter the skin of the host, he and develop into adults subcutaneously. 
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The prepatent period of ''P. bovicola'' is 7-9 months.
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=''P. multipapillosa''=
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{| cellpadding="10" cellspacing="0" border="1"
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| Also known as:
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| '''Filaria haemorrhagica
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|-
 +
|}
 +
 
 +
===Scientific Classification===
 +
 
 +
{| cellpadding="10" cellspacing="0" border="1" 
 +
| Class
 +
| Nematoda
 +
|-
 +
| Superfamily
 +
| Filarioidea
 +
|}
 +
 
 +
==Hosts==
 +
'''Intermediate hosts''': Horn flies.
 +
 
 +
'''Definitive host''': Horses and donkeys.
 +
 
 +
==Identification==
 +
''P. multipapillosa'' are slender white worms, measuring 3-7cm in length.
 +
 
 +
==Life Cycle==
 +
The eggs or L1 are ingested by horn flies.  The larvae matur into L3 several months later.  Infected flies feed on the definitive host.  The larvae then attach to the host, and begin to migrate under the skin of the host, where they develop into adults. 
 +
 
 +
The prepatent period is 9-12 months.
 +
 
 +
==References==
 +
 
 +
Taylor, M.A, Coop, R.L., Wall,R.L. (2007) '''Veterinary Parasitology''' ''Blackwell Publishing''
  
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==== Life-Cycle ====
 
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*Indirect LC, horn fly (''Haematobia'') intermediate host.
 
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*Female worms perforate nodules and lay eggs on skin surface; hatch to L1.
 
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*Fly ingests L1 during feeding, develops to L3 inside fly.
 
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*New host infected when fly feeds on skin wound, L3 enters and matures to adult worm.
 
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*Prepatent period = 8-10months.
 
  
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==== Pathogenicity ====
 
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*Female worm punctures skin to lay eggs - bleeding points ("sweating blood"); most active in warm weather after horse exercised.
 
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*Lesions only temporary, though reappear the following spring (worms live several years).
 
  
 
[[Category:Filarioidea]]
 
[[Category:Filarioidea]]
 
[[Category:Horse_Nematodes]]
 
[[Category:Horse_Nematodes]]
 
[[Category:To_Do_-_Max]]
 
[[Category:To_Do_-_Max]]

Revision as of 20:55, 26 July 2010


 This article is still under construction.


P. bovicola

Also known as: Summer bleeding disease.


Verminous nodules

Scientific Classification

Class Nematoda
Superfamily Filarioidea

Hosts

Intermediate host: Muscid flies.

Definitive host: Cattle and buffalos.

Identification

P. bovicola are thin, white worms, ranging between 3-6cm in length.

Life Cycle

The life cycle of P. bovicola is indirect. The eggs hatch on the surface of the host. These eggs are ingested by the flies acting as intermediate hosts. Larvae develop and transform into infective L3. The flies then feed on the host, and the larvae are past onto the host. The larvae then enter the skin of the host, he and develop into adults subcutaneously.

The prepatent period of P. bovicola is 7-9 months.

P. multipapillosa

Also known as: Filaria haemorrhagica

Scientific Classification

Class Nematoda
Superfamily Filarioidea

Hosts

Intermediate hosts: Horn flies.

Definitive host: Horses and donkeys.

Identification

P. multipapillosa are slender white worms, measuring 3-7cm in length.

Life Cycle

The eggs or L1 are ingested by horn flies. The larvae matur into L3 several months later. Infected flies feed on the definitive host. The larvae then attach to the host, and begin to migrate under the skin of the host, where they develop into adults.

The prepatent period is 9-12 months.

References

Taylor, M.A, Coop, R.L., Wall,R.L. (2007) Veterinary Parasitology Blackwell Publishing

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