|
|
| (13 intermediate revisions by 3 users not shown) |
| Line 1: |
Line 1: |
| − | == Nematodes of Sheep - Gastrointestinal Nematodes == | + | {{frontpage |
| − | [[Image:Nematodirus ruminant.jpg|thumb|right|150px|''Nematodirus'' from ruminant faeces - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
| + | |pagetitle = Sheep Nematodes |
| − | Many worm species occur in the gastrointestinal tract of sheep, though relatively few are of importance in the UK. Primary pathogens include:
| + | |pagebody = |
| | + | |contenttitle = Content |
| | + | |contentbody = |
| | + | <big><b> |
| | + | <br> |
| | + | <categorytree mode=pages>Sheep Nematodes</categorytree> |
| | + | <br> |
| | + | <br> |
| | + | </b></big> |
| | + | |logo=sheep-logo2.png}} |
| | | | |
| − | {| style="width:75%; height:200px" border="1"
| |
| | | | |
| − | !
| |
| − | !'''Abomasum'''
| |
| − | !'''Small Intestine'''
| |
| − | !'''Large Intestine'''
| |
| | | | |
| − | |-
| |
| − | |'''Primary Pathogens in the UK'''
| |
| − | |
| |
| − | *''Ostertagia (Teladorsagia) circumcincta''
| |
| | | | |
| − | *''Haemonchus contortus''
| + | [[Category:Sheep Parasites]] |
| − | |
| |
| − | *''Trichostrongylus'' species
| |
| − | | |
| − | *''Nematodirus battus''
| |
| − | |
| |
| − | |-
| |
| − | |'''Worms that contribute to ovine PGE, but are rarely primary pathogens in the UK'''
| |
| − | |
| |
| − | *''Trichostrongylus axei''
| |
| − | |
| |
| − | *other ''Nematodirus'' species
| |
| − | | |
| − | *''Cooperia'' species
| |
| − | | |
| − | *''Bunostomum'' species
| |
| − | | |
| − | *''Strongyloides'' species
| |
| − | |
| |
| − | *''Oesophagostomum'' species
| |
| − | | |
| − | *''Chabertia'' species
| |
| − | | |
| − | *''Trichuris'' species
| |
| − | |}
| |
| − | | |
| − | | |
| − | *All the above worms belong to the '''Trichotrongyloidea''' except:
| |
| − | **''Bunostomum'' (a hookworm)
| |
| − | **''Oesophagostomum''
| |
| − | **''Chabertia'' (Strongyloidea)
| |
| − | **''Strongyloides'' (Rhabditoidea)
| |
| − | **''Trichuris'' (a whipworm)
| |
| − | *Although many different genera and species of worms may be found in the gastro-intestinal tract of sheep there are only three distinct disease manifestations within the [[Parasitic Gastroenteritis|PGE]] complex:
| |
| − | **Ostertagiosis and Trichostrongylosis
| |
| − | **Nematodirosis
| |
| − | **Haemonchosis
| |
| − | | |
| − | == Succession of Gastrointestinal Worm Species ==
| |
| − | The relative number of worms of each species changes during the grazing season. The succession of species is due to differences in:
| |
| − | *Ability of L3 to overwinter
| |
| − | *Fecundity between worm species
| |
| − | *Rate of development from egg to L3 stage
| |
| − | *Special requirements of ''Nematodirus''
| |
| − | | |
| − | | |
| − | [[Category:Sheep]] | |
| − | [[Category:To_Do_-_Parasites]]
| |
