Difference between revisions of "Dictyocaulosis - Sheep"
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− | + | === Pathogenesis === | |
+ | *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''''': | ||
+ | **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 | ||
+ | |||
+ | ==Test yourself with the Small Ruminant Nematodes Flashcards== | ||
+ | |||
+ | [[Small_Ruminant_Nematodes_Flashcards|Small Ruminant Nematodes Flashcards]] | ||
− | |||
[[Category:Respiratory Diseases - Sheep]] | [[Category:Respiratory Diseases - Sheep]] | ||
[[Category:Respiratory Parasitic Infections]] | [[Category:Respiratory Parasitic Infections]] |
Revision as of 14:55, 21 January 2011
Pathogenesis
- Caused by Dictyocaulus filaria
- Similar to 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:
- 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