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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|l1= Cobalt Deficiency - Sheep
 
|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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|l2= Cobalt Deficiency - Sheep#Diagnosis
 
|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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|l3= Cobalt Deficiency - Sheep#Treatment
 
|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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|l4= Cobalt Deficiency - Sheep#Control
 
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Latest revision as of 15:42, 24 July 2011


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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? Link to Article
How would you investigate this problem? Link to Article
What treatments would you administer? Link to Article
How would you prevent a similar problem next year? Link to Article


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