Questions and Answers
What is flystrike and which animal does it primarily affect?
Flystrike is a myiasis condition affecting domestic sheep, caused by parasitic flies that lay eggs on soiled wool or wounds.
What role does sheep wool contamination play in the development of flystrike?
Contaminated wool with urine and fecal material provides an effective breeding ground for maggots, increasing the risk of flystrike.
Describe the life cycle of flies that cause flystrike in sheep.
Flies lay eggs on soiled wool or wounds, and upon hatching, the maggots burrow into the wool and under the skin, feeding on flesh.
What symptoms do flystruck sheep display that indicate infection?
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How does ammonia poisoning relate to flystrike in sheep?
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Which species of flies are primarily responsible for most flystrike infestations in Australia?
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What visible signs can be used to identify flystruck sheep in a flock?
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In male sheep, where are common areas for flystrike to occur?
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What behavioral changes might flystruck sheep exhibit when settled?
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What are the implications of flystrike for sheep production management?
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Study Notes
Flystrike in Sheep
- Myiasis condition caused by parasitic flies infecting domestic sheep.
- Thick wool contaminated with urine and fecal matter creates breeding grounds for maggots, even without wounds.
- Flies lay eggs on soiled wool or open wounds; maggots hatch and burrow into the sheep's flesh.
- After larvae develop, flies lay eggs on new or infected sheep, perpetuating the cycle of infestation.
- Symptoms include agitation, loss of appetite, unpleasant odor, and matted wool, attracting more flies.
- Ammonia poisoning can result from flystrike, making it potentially lethal for sheep.
- Infestation causes economic losses due to stock degradation and increased management expenses.
Flystrike Causes and Effects
- In Australia, Lucilia cuprina accounts for approximately 90% of infestations.
- Chrysomya rufifacies is the main secondary pest, targeting wounds from L. cuprina.
- Flystruck sheep show green or wet-looking fleece patches, particularly around the haunches, tail, or wounds.
- Penile area in male sheep is also a common flystrike site.
- Infected sheep display agitation behaviors such as foot stamping or nibbling at their body.
- Severe cases can lead to shedding of wet-looking wool and produce a strong characteristic odor.
Environmental Factors
- Optimal conditions for flystrike include temperatures between 15–38°C (59–100°F), recent rainfall, and wind speeds under 9 km/h (5.6 mph).
- UK peak breeding season for green bottle flies generally occurs in late June or July, though infestations can happen any time warm, damp conditions are present.
Prevention and Management
- Various preventative measures exist to minimize flystrike risk in sheep flocks.
- No single measure can entirely prevent flystrike; regular treatment and monitoring are essential for effective management.
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Description
Test your knowledge on the myiasis condition known as flystrike in sheep. This quiz covers the causes, effects, and prevention strategies related to parasitic maggots that can infest domestic sheep. Understand how these external parasites thrive and impact sheep health.
