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Created page with "{{Template:Manson}} centre|500px <br /> '''A two-crop ewe from a group of 155 pastured sheep due to start lambing in 3 weeks has aborted two fr..."
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[[Image:Sheep Medicine 11.jpg|centre|500px]]
<br />
'''A two-crop ewe from a group of 155 pastured sheep due to start lambing in 3 weeks has aborted two fresh fetuses. Three other abortions have occurred over the previous 5 days. The ewe is bright and alert but there is a red–brown vulval discharge over the wool of the tail and perineum. The rectal temperature is 40.0°C (104.0°F). The udder is reasonably well developed and there is some accumulated colostrum.'''
<br />
<FlashCard questions="4">
|q1=What samples would you collect?
|a1=
A vaginal swab, fetuses, and placentae should be submitted for laboratory examination. <br><br>
Blood samples are collected from all aborted ewes for toxoplasma and EAE serology.
|l1=
|q2=List the common causes of abortion.
|a2=
Common abortifacient agents include:
*''Chlamydophila psittaci'' (EAE)
*salmonellosis including ''Salmonella montevideo'', ''S. typhimurium'', and other serotypes
*''Campylobacter fetus fetus''
*''Toxoplasma gondii''
*''Listeria monocytogenes''
*''Pasteurella'' spp.
*tick-borne fever.
''C. psittaci'' was demonstrated in direct smears from the placentae and a strong positive titre obtained in three of four blood samples; a very high titre for toxoplasma was recorded for the other ewe. <br>
Any further aborted material must be submitted to monitor the situation. The zoonotic risk of chlamydial abortion, especially to pregnant women, should be stressed.
|l2=
|q3=What treatments would you consider?
|a3=The ewe was treated with intravenous oxytetracycline and made a rapid recovery. The ewe accepted a small male triplet foster lamb. <br><br>
All ewes in the group were injected with 20 mg/kg long-acting oxytetracycline intramuscularly that same day to reduce further abortions.
|l3=
|q4=What control measures could be adopted?
|a4=
#Aborted ewes must be isolated for at least 6 weeks and all aborted material buried or burned.
#With EAE now present in the flock the farmer should be strongly advised to vaccinate all replacement females even if purchasing EAE-accredited stock.
#In this case it was recommended that all ewes which had possibly encountered infection this spring should also be vaccinated, and treated with long- acting oxytetracycline next year 6 weeks and 3 weeks before lambing.
#Vaccination against toxoplasmosis would depend upon titres in aborted versus control ewes.
|l4=
</FlashCard>
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[[Category:Sheep Medicine Q&A]]
[[Image:Sheep Medicine 11.jpg|centre|500px]]
<br />
'''A two-crop ewe from a group of 155 pastured sheep due to start lambing in 3 weeks has aborted two fresh fetuses. Three other abortions have occurred over the previous 5 days. The ewe is bright and alert but there is a red–brown vulval discharge over the wool of the tail and perineum. The rectal temperature is 40.0°C (104.0°F). The udder is reasonably well developed and there is some accumulated colostrum.'''
<br />
<FlashCard questions="4">
|q1=What samples would you collect?
|a1=
A vaginal swab, fetuses, and placentae should be submitted for laboratory examination. <br><br>
Blood samples are collected from all aborted ewes for toxoplasma and EAE serology.
|l1=
|q2=List the common causes of abortion.
|a2=
Common abortifacient agents include:
*''Chlamydophila psittaci'' (EAE)
*salmonellosis including ''Salmonella montevideo'', ''S. typhimurium'', and other serotypes
*''Campylobacter fetus fetus''
*''Toxoplasma gondii''
*''Listeria monocytogenes''
*''Pasteurella'' spp.
*tick-borne fever.
''C. psittaci'' was demonstrated in direct smears from the placentae and a strong positive titre obtained in three of four blood samples; a very high titre for toxoplasma was recorded for the other ewe. <br>
Any further aborted material must be submitted to monitor the situation. The zoonotic risk of chlamydial abortion, especially to pregnant women, should be stressed.
|l2=
|q3=What treatments would you consider?
|a3=The ewe was treated with intravenous oxytetracycline and made a rapid recovery. The ewe accepted a small male triplet foster lamb. <br><br>
All ewes in the group were injected with 20 mg/kg long-acting oxytetracycline intramuscularly that same day to reduce further abortions.
|l3=
|q4=What control measures could be adopted?
|a4=
#Aborted ewes must be isolated for at least 6 weeks and all aborted material buried or burned.
#With EAE now present in the flock the farmer should be strongly advised to vaccinate all replacement females even if purchasing EAE-accredited stock.
#In this case it was recommended that all ewes which had possibly encountered infection this spring should also be vaccinated, and treated with long- acting oxytetracycline next year 6 weeks and 3 weeks before lambing.
#Vaccination against toxoplasmosis would depend upon titres in aborted versus control ewes.
|l4=
</FlashCard>
{{#tag:imagemap|Image:Next Question.png{{!}}center{{!}}200px
rect 0 0 860 850 [[Sheep Medicine Q&A 11|Sheep Medicine Q&A 11]]
desc none}}
[[Category:Sheep Medicine Q&A]]