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A faecal egg count (FEC) is used to monitor parasite numbers in sheep - Leaving Cert Agricultural Science - Question d - 2022
Question d
A faecal egg count (FEC) is used to monitor parasite numbers in sheep. It is carried out regularly throughout the grass growing season. Jim took dung samples from ea... show full transcript
Worked Solution & Example Answer:A faecal egg count (FEC) is used to monitor parasite numbers in sheep - Leaving Cert Agricultural Science - Question d - 2022
Step 1
Flock 1: Briefly describe the dosing plan Jim would carry out in flocks 1 and 2.
Answer
Jim should consider that the FEC for Flock 1 is 430 eggs per gram, which falls into the 'Medium' range. He should follow a strategic dosing plan, which may include assessing the specific dewormers that are effective against the parasite detected. A single dose could be administered, followed by a re-evaluation of FEC after a few weeks to see if the treatment was effective.
Step 2
Flock 2: Briefly describe the dosing plan Jim would carry out in flocks 1 and 2.
Answer
For Flock 2, with an FEC of 220 eggs per gram, Jim is in the 'Low' range. Hence, he may opt to monitor the flock rather than dose immediately, since the level is not concerningly high. A regular review and monitoring of FEC results would help decide if treatment is necessary in the future.
Step 3
Advise Jim on what he should do with flock 3.
Answer
Since Flock 3 consistently shows a high FEC result of 790 eggs per gram after two previous treatments, Jim should consider either rotating dewormers to combat potential resistance or changing the treatment strategy altogether. Another option is to evaluate the effectiveness of the current treatment, possibly consulting a veterinarian for further advice on managing this flock.
Step 4
Outline two advantages of using faecal egg counts in parasite control.
Answer
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Faecal egg counts provide a precise measure of parasite burden in livestock, allowing for targeted treatments instead of blanket deworming, which helps in minimizing resistance development.
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They help save costs by reducing the number of unnecessary treatments, thus maintaining the health of the herd while ensuring effective parasite management.