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The prepatent period of ''D. filaria'' is 4-5 weeks.
The prepatent period of ''D. filaria'' is 4-5 weeks.
==Literature Search==
=== Pathogenesis ===
[[File:CABI logo.jpg|left|90px]]
*Caused by '''''[[Dictyocaulus filaria]]'''''
**Similar to [[Dictyocaulus viviparus|''D. viviparus'']] in cattle
**Lesions tend to be less widespread because worm numbers are generally low
=== Diagnosis ===
*Grazing history
*Clinical signs
*Faecal examination (larval identification possible by examining head, e.g. ''Dictyocaulus filaria'' (knob) or tail, e.g. ''Muellerius'' (single spine), ''Protostrongylus'' (wavy, no spine) → prognosis)
=== Control ===
*'''''Dictyocaulus filaria''''':
[http://www.cabdirect.org/search.html?q=title%3A%28%22Dictyocaulus+filaria%22%29 ''Dictyocaulus filaria'' publications]
**Difficult because outbreaks are unpredictable
**PGE control measures are normally sufficient to prevent outbreaks of disease
**Where these occur, remove and treat affected stock, replace with older immune sheep if necessary
**A commercial vaccine was available in the Middle East, though its use (were it still available) would be uneconomic in the UK
{{Learning
|flashcards = [[Small_Ruminant_Nematodes_Flashcards|Small Ruminant Nematodes Flashcards]]
|literature search = [http://www.cabdirect.org/search.html?q=title%3A%28%22Dictyocaulus+filaria%22%29 ''Dictyocaulus filaria'' publications]
}}
==References==
==References==
[[Category:Dictyocaulus]][[Category:Sheep_Nematodes]]
[[Category:Dictyocaulus]][[Category:Sheep_Nematodes]]
[[Category:Respiratory Parasitic Infections]]
[[Category:Respiratory Parasitic Infections]]
[[Category:Goat_Nematodes]]
[[Category:Goat_Nematodes]]