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Coccidia in sheep in South Australia
Veterinary Parasitology
|May 1, 1987
Summary
This study identified 11 Eimeria species in South Australian sheep, with infection rates decreasing significantly after six months of age. Eimeria crandallis/E. weybridgensis was the most prevalent species found.
Area of Science:
- Veterinary Parasitology
- Sheep Health
- Eimeria spp. Research
Background:
- Eimeria species are significant protozoan parasites affecting sheep worldwide.
- Understanding Eimeria prevalence and species composition is crucial for effective flock management.
Purpose of the Study:
- To identify and quantify Eimeria species in sheep faecal samples from South Australia.
- To investigate the age-related dynamics of Eimeria infections in lambs.
Main Methods:
- Faecal samples from 136 sheep across four locations were analyzed for Eimeria oocysts.
- Monthly sampling of 48 lambs over one year tracked oocyst counts and infection patterns.
Main Results:
- Eimeria oocysts were detected in 80% of sheep, with 11 species identified.
- E. crandallis/E. weybridgensis (76%) and E. ovina (55%) were the most common species.
- Oocyst counts decreased significantly in lambs after six months of age, persisting at low levels.
Conclusions:
- The study provides a comprehensive overview of Eimeria species prevalent in South Australian sheep.
- Age is a critical factor influencing Eimeria infection intensity in lambs, with a natural decline in oocyst shedding after weaning.