Difference between revisions of "Sheep Medicine Q&A 04"
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The poor growth rates of this group of lambs could be the result of poor grazing, overstocking, PGE, and trace element deficiency acting alone or in various combinations. <br> | The poor growth rates of this group of lambs could be the result of poor grazing, overstocking, PGE, and trace element deficiency acting alone or in various combinations. <br> | ||
The neurological signs are consistent with a diffuse cortical lesion – most likely a hepatic encephalopathy. | The neurological signs are consistent with a diffuse cortical lesion – most likely a hepatic encephalopathy. | ||
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|q2=How would you investigate this problem? | |q2=How would you investigate this problem? | ||
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*Liver enzyme concentrations (AST, GLDH, and GGT) are raised four- to six-fold in the four lambs sampled. | *Liver enzyme concentrations (AST, GLDH, and GGT) are raised four- to six-fold in the four lambs sampled. | ||
*Serum vitamin B 12 concentration from six lambs reveal very low levels (mean <88.6 pmol/L, <120 pg/mL). | *Serum vitamin B 12 concentration from six lambs reveal very low levels (mean <88.6 pmol/L, <120 pg/mL). | ||
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|q3=What treatments would you administer? | |q3=What treatments would you administer? | ||
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Two of 12 lambs failed to respond to vitamin B 12 and supportive therapy and were euthanased for welfare reasons. <br> | Two of 12 lambs failed to respond to vitamin B 12 and supportive therapy and were euthanased for welfare reasons. <br> | ||
Necropsy revealed a pale and friable liver. | Necropsy revealed a pale and friable liver. | ||
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|q4=How would you prevent a similar problem next year? | |q4=How would you prevent a similar problem next year? | ||
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The low unit cost of cobalt sulphate allows routine inclusion in anthelmintic drenches (commercial ‘SC’ preparations, or at inclusion rates of 15–30 g per 10 L of 2.25% benzimidazole or 1.5% levamisole drench). | The low unit cost of cobalt sulphate allows routine inclusion in anthelmintic drenches (commercial ‘SC’ preparations, or at inclusion rates of 15–30 g per 10 L of 2.25% benzimidazole or 1.5% levamisole drench). | ||
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</FlashCard> | </FlashCard> | ||
Revision as of 14:24, 23 May 2011
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This question was provided by Manson Publishing as part of the OVAL Project. See more Sheep questions |
A farmer complains of apparent sudden-onset profound depression and blindness in 12 of 300 6-month-old lambs. When confined, the lambs are found head-pressing and there is frequent teeth-grinding. There are no cranial nerve deficits. The lambs are poorly grown (18–24 kg) with a dirty open fleece. The lambs have poor abdominal fill and there is faecal staining of the perineum and tail. The lambs are grazing permanent grassland in a National Park used extensively by the general public for walking their dogs.
| Question | Answer | Article | |
| What conditions would you consider? | The most likely conditions to consider include:
The poor growth rates of this group of lambs could be the result of poor grazing, overstocking, PGE, and trace element deficiency acting alone or in various combinations. |
[[|Link to Article]] | |
| How would you investigate this problem? |
|
[[|Link to Article]] | |
| What treatments would you administer? | All lambs should be treated with vitamin B 12 by intramuscular injection. |
[[|Link to Article]] | |
| How would you prevent a similar problem next year? | The low unit cost of cobalt sulphate allows routine inclusion in anthelmintic drenches (commercial ‘SC’ preparations, or at inclusion rates of 15–30 g per 10 L of 2.25% benzimidazole or 1.5% levamisole drench). |
[[|Link to Article]] | |
