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| ==Signalment== | | ==Signalment== |
− | Foals younger than 6 months in poor condition, on a poor worming schedule and with a heavy parasite burden. Adult horses demonstrate age-related immunity from around 15 months. | + | Foals younger than 6 months in poor condition, on a poor worming schedule and with a heavy parasite burden. Adult horses demonstrate age-related immunity which starts to develop from around 6 months and is substantial by about 15 months depending on worm exposure. |
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| ==History== | | ==History== |
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− | Recent history (within the previous 24 hours) of being wormed with a product that causes sudden ascarid death. | + | Recent history (within the previous 24 hours) of being wormed with a product effective against ascarids. |
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| ==Aetiology== | | ==Aetiology== |
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| *Piperazine | | *Piperazine |
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| + | ==Clinical Signs== |
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− | ==Clinical Signs==
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| *Acute onset mild to severe colic after administration of anthelmintic (onset varies with degree of obstruction (37)) | | *Acute onset mild to severe colic after administration of anthelmintic (onset varies with degree of obstruction (37)) |
| *Signs compatible with [[Colic Diagnosis - Clinical Signs|small intestinal obtruction]] | | *Signs compatible with [[Colic Diagnosis - Clinical Signs|small intestinal obtruction]] |
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| ==Treatment== | | ==Treatment== |
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| *[[Colic, Medical Treatment|'''Medical treatment:''']] immediate treatment of hypovolaemic shock resulting from sequestration of fluid in small intestine | | *[[Colic, Medical Treatment|'''Medical treatment:''']] immediate treatment of hypovolaemic shock resulting from sequestration of fluid in small intestine |
| *'''Surgical treatment:''' enterotomy made over the intraluminal impaction and removal of ascarids | | *'''Surgical treatment:''' enterotomy made over the intraluminal impaction and removal of ascarids |
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| ==Prognosis== | | ==Prognosis== |
− | Fair in cases that are rapidly treated but poor in foals with evidence of hypovolaemia and septic shock. Surgical cases also carry a poorer prognosis than cases which are resolved medically. In a recent study, long term survival of 25 affected horses was 33%(37).
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| + | Fair in cases that are rapidly treated but poor in foals with evidence of hypovolaemia and septic shock. Surgical cases also carry a poorer prognosis than cases which are resolved medically. In a recent study, long term survival of 25 affected horses was 33%(37). Failure to relieve the impaction may lead to intestinal rupture. |
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| ==Prevention== | | ==Prevention== |