Changes

Jump to navigation Jump to search

Syngamus trachea (view source)

Revision as of 11:56, 16 July 2010

419 bytes removed ,  11:56, 16 July 2010
no edit summary
Line 12: Line 12:     
''S. bronchialis'' is a nematode of the superfamily ''strongyloidea'', and are found worldwide.  It commonly affects the lungs of many game birds within the UK.
 
''S. bronchialis'' is a nematode of the superfamily ''strongyloidea'', and are found worldwide.  It commonly affects the lungs of many game birds within the UK.
 +
 +
 +
 +
'''Scientific Classification'''
 +
 +
{| cellpadding="10" cellspacing="0" border="1" 
 +
| Kingdom
 +
| Animalia
 +
|-
 +
| Phylum
 +
| Nematoda
 +
|-
 +
| Class
 +
| Secernentea
 +
|-
 +
| Order
 +
| Strongylida
 +
|-
 +
| Family
 +
| Syngamidae
 +
|-
 +
| Genus
 +
| Syngamus
 +
|-
 +
| Species
 +
| '''S. trachea'''
 +
|}
    
==Hosts==
 
==Hosts==
Line 20: Line 47:     
==Life Cycle==
 
==Life Cycle==
 +
L1-L3 develops in the egg.  Infection may be via ingestion of L3 in the egg, or a hatched L3, or ingestion of a paratenic host, most commonly the earthworm.
    +
The L3 then penetrate the intestine, and enter the lungs.  The L3 then undergo 2 further moults, and copulation occurs in the trachea a few days later.
   −
*The 'gapeworm' - an atypical strongyloid.
+
The prepatent period of ''S. trachea'' is between 16 and 20 days.
−
*Deep red in colour.
  −
*'Y'-shaped as the smaller male is permanently attached to the female.
  −
*Lives in the trachea.
  −
*Wide host range, including many wild birds (rooks and crows commonly affected) as well as poultry and game birds.
  −
*Causes respiratory distress ('''gapes'''), especially in young birds.
  −
 
  −
==== Life-Cycle ====
  −
*The egg is like a typical strongyle egg, except that there is an operculum at each end.
  −
*Infective larva develops inside the egg.
  −
*Birds can be infected by ingesting:
  −
**the larvated egg
  −
**the larva after hatching out of the egg
  −
**or by eating an earthworm (transport host) that has previously swallowed an egg or larva.
  −
 
  −
==== Epidemiology ====
  −
Gapes is a common and serious problem in pheasant poults. A common sequence of events is as follows:
  −
*Infected wild birds (e.g. crows):
  −
 
  −
→ droppings on ground
  −
 
  −
→ soil contaminated with ''Syngamus'' eggs
  −
 
  −
→ earthworms infected
  −
 
  −
→ reservoir of infection
  −
 
  −
→ eaten by pheasant poults reared on earth-floored pens in woodland
     −
→ disease.
      
[[Category:Strongyloidea]][[Category:Poultry Nematodes]]
 
[[Category:Strongyloidea]][[Category:Poultry Nematodes]]
 
[[Category:To_Do_-_Max]]
 
[[Category:To_Do_-_Max]]
Cmcory
1,377

edits

Retrieved from "https://en.wikivet.net/Special:MobileDiff/72871"

Navigation menu