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| − | == General Appearance ==
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| − | *Bursate
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| − | *Large buccal capsule
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| − | *Relatively short (typically 1-5cm) but stout
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| − | *Heads often have characteristic features - teeth or cutting plates
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| − | == General Life-Cycle ==
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| − | *Like that of the trichostrongyloids (eggs are also 'typical strongyle eggs'), but:
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| − | **L3 → L4 → adult (typically occurs in the large intestine)
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| − | **Larvae penetrate the mucosal wall and elicit nodule formation
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| − | **Larvae of some species migrate around the body
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| − | **Prepatent period varies between species from 3 weeks to over 6 months
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| − | [[Strongylus vulgaris]]
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| − | [[Peritoneal Cavity Inflammatory - Pathology#In sheep|Peritonitis in sheep]] by penetration of intestines by larvae of ''Oesophagostomum columbianum''
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| − | ''Strongylus edentatus'' and ''Strongylus equinus'' migrate through [[Peritoneal Cavity Parasitic - Pathology]]
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| − | ''Stephanuris dentatus'' causes peritonitis in pigs [[Peritoneal Cavity Parasitic - Pathology]] and may cause cysts in the [[Pancreas Parasitic - Pathology|pancreas]]
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| − | ''Syngamus laryngeus'' in [[Respiratory Parasitic Infections - Pathology#Syngamus laryngeus|larynx]] of cattle
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