31,596
edits
Changes
Jump to navigation
Jump to search
Equine Internal Medicine Q&A 15 (view source)
Revision as of 07:52, 1 June 2011
, 07:52, 1 June 2011Created page with "{{Template:Manson Mair}} centre|500px<br> <br /> '''Exploratory laparotomy was carried out on a 14-month- old Standardbred colt o..."
{{Template:Manson Mair}}
[[Image:Equine Internal Medicine Q&A 14.jpg|centre|500px]]<br>
<br />
'''Exploratory laparotomy was carried out on a 14-month- old Standardbred colt on the evidence of physical findings consistent with small intestinal obstruction. At surgery the findings were those illustrated in the image.'''
<br />
<FlashCard questions="2">
|q1=What is the diagnosis?
|a1=Small intestinal impaction with Parascaris equorum. Ascarid infection is common in equine animals less than two years old, after which a strong immunity to this parasite develops. <br><br>
The occurrence of ascarid, intestinal impaction is very rare.
|l1=
|q2=What advice would you give to the owner of the colt?
|a2=Advice to the owner is:
*Treat any grazing cohorts of similar age with anthelmintic.
*Implement a parasite prophylaxis programme or modify the existing programme.
*Treat any grazing cohorts of similar age with anthelmintic. <br><br>
Parasitological features relevant to control of ascarids are:
*Adult worms are prolific egg producers.
*Ascarid eggs are thick-shelled and resilient in the environment.<br><br>
Although there is a potential risk of inducing further cases of ascarid impaction following treatment and death of large numbers of luminal worms, the probability of this is low. <br><br>
The drug of choice is either
*oral ivermectin (0.2mg/kg bodyweight) or
*oral fenbendazole (10mg/kg on five consecutive days). <br>
It will be necessary to repeat treatment at intervals of approximately 30 days as neither treatment regimen has high efficacy against immature ascarids early in migration.<br><br>
If possible, following treatment the group of animals should be grazed on pasture not used for young horses within the previous 12 months. As a result, in areas grazed by young animals with an inappropriate parasite prophylaxis programme it is likely that there will be a high level of transmission of parasites between horses.<br><br>
Ascarid prophylaxis is best achieved by interval dosing all animals from three months of age with either
*pyrantel (four weekly),
*benzimidazoles (six weekly) or
*ivermectin (6–8 weekly). <br>
Alternatively, control could be achieved with daily in-feed dosing with pyrantel but this product is not licensed in Europe.<br><br>
Ideally, owners and managers should avoid using the same grazing area year-on-year for their young, growing animals.
|l2=
</FlashCard>
{{#tag:imagemap|Image:Next Question.png{{!}}center{{!}}200px
rect 0 0 860 850 [[Equine Internal Medicine Q&A 16|Next question]]
desc none}}
[[Category:Equine Internal Medicine Q&A]]
[[Image:Equine Internal Medicine Q&A 14.jpg|centre|500px]]<br>
<br />
'''Exploratory laparotomy was carried out on a 14-month- old Standardbred colt on the evidence of physical findings consistent with small intestinal obstruction. At surgery the findings were those illustrated in the image.'''
<br />
<FlashCard questions="2">
|q1=What is the diagnosis?
|a1=Small intestinal impaction with Parascaris equorum. Ascarid infection is common in equine animals less than two years old, after which a strong immunity to this parasite develops. <br><br>
The occurrence of ascarid, intestinal impaction is very rare.
|l1=
|q2=What advice would you give to the owner of the colt?
|a2=Advice to the owner is:
*Treat any grazing cohorts of similar age with anthelmintic.
*Implement a parasite prophylaxis programme or modify the existing programme.
*Treat any grazing cohorts of similar age with anthelmintic. <br><br>
Parasitological features relevant to control of ascarids are:
*Adult worms are prolific egg producers.
*Ascarid eggs are thick-shelled and resilient in the environment.<br><br>
Although there is a potential risk of inducing further cases of ascarid impaction following treatment and death of large numbers of luminal worms, the probability of this is low. <br><br>
The drug of choice is either
*oral ivermectin (0.2mg/kg bodyweight) or
*oral fenbendazole (10mg/kg on five consecutive days). <br>
It will be necessary to repeat treatment at intervals of approximately 30 days as neither treatment regimen has high efficacy against immature ascarids early in migration.<br><br>
If possible, following treatment the group of animals should be grazed on pasture not used for young horses within the previous 12 months. As a result, in areas grazed by young animals with an inappropriate parasite prophylaxis programme it is likely that there will be a high level of transmission of parasites between horses.<br><br>
Ascarid prophylaxis is best achieved by interval dosing all animals from three months of age with either
*pyrantel (four weekly),
*benzimidazoles (six weekly) or
*ivermectin (6–8 weekly). <br>
Alternatively, control could be achieved with daily in-feed dosing with pyrantel but this product is not licensed in Europe.<br><br>
Ideally, owners and managers should avoid using the same grazing area year-on-year for their young, growing animals.
|l2=
</FlashCard>
{{#tag:imagemap|Image:Next Question.png{{!}}center{{!}}200px
rect 0 0 860 850 [[Equine Internal Medicine Q&A 16|Next question]]
desc none}}
[[Category:Equine Internal Medicine Q&A]]