Difference between revisions of "Coccidiosis - Sheep"
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(Created page with '*11 different Coccidia species although only two are of clinical significance **Giant schizonts visible as white spots *''Eimeria ovinoidalis'' **Highly pathogenic **[[Intestine…') |
m (Text replace - 'Eimeria' to 'Eimeria') |
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| Line 2: | Line 2: | ||
**Giant schizonts visible as white spots | **Giant schizonts visible as white spots | ||
| − | *''Eimeria ovinoidalis'' | + | *''[[Eimeria spp.|Eimeria]] ovinoidalis'' |
**Highly pathogenic | **Highly pathogenic | ||
**[[Intestine Diarrhoea - Pathology|Diarrhoea]] | **[[Intestine Diarrhoea - Pathology|Diarrhoea]] | ||
**Parasitises the [[Caecum - Anatomy & Physiology|caecum]] and [[Colon - Anatomy & Physiology|colon]] | **Parasitises the [[Caecum - Anatomy & Physiology|caecum]] and [[Colon - Anatomy & Physiology|colon]] | ||
| − | *''Eimeria crandalis'' | + | *''[[Eimeria spp.|Eimeria]] crandalis'' |
**Varying pathogenicity | **Varying pathogenicity | ||
**Scours, grey, foul-smelling faeces | **Scours, grey, foul-smelling faeces | ||
| Line 24: | Line 24: | ||
**Post-mortem diagnosis difficult | **Post-mortem diagnosis difficult | ||
| − | *Different species of ''Eimeria'' occurs in sheep and goats | + | *Different species of ''[[Eimeria spp.|Eimeria]]'' occurs in sheep and goats |
*Infection may be coincident with ''Neospora'' or ''Cryptosporidium'' infections | *Infection may be coincident with ''Neospora'' or ''Cryptosporidium'' infections | ||
Revision as of 22:52, 8 April 2010
- 11 different Coccidia species although only two are of clinical significance
- Giant schizonts visible as white spots
- Eimeria crandalis
- Varying pathogenicity
- Scours, grey, foul-smelling faeces
- Parasitises the small intestine, caecum and colon
- 2 week prepatent period
- Disease frequently seen in lambs under 6 months old
- More often in twins and triplets when single lambs
- Oocyts from ewes (immune carriers) accumulate in poorly managed litter or around feed and water troughs
- Lambs born early in the year amplify the parasite problem increasing the parasite risk to lambs born later in the year
- Affected lambs may die before oocysts are found in the faeces
- Post-mortem diagnosis difficult
- Different species of Eimeria occurs in sheep and goats
- Infection may be coincident with Neospora or Cryptosporidium infections
- Mixed infections complicate the diagnosis as oocyst differentiation is difficult
- Other non-pathogenic species can cause papillomatous mucosal growths
Control
- Improve husbandry
- Avoid overcrowding
- Decrease stress
- Improve hygiene by dagging ewes
- Avoid mixing lambs of different ages
- Preventative measures include creep feeding lambs with decoquinate or oral dosing with diclazuril when lambs are 4-6 weeks
- A second dose can be given after 3 weeks