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Created page with '*Sheep **Mostly asymptomatic **However, if a non-immune ewe is infected during pregnancy the consequences will be serious ***Infection during the first trimester leads to resorpt…'
*Sheep
**Mostly asymptomatic
**However, if a non-immune ewe is infected during pregnancy the consequences will be serious
***Infection during the first trimester leads to resorption
**Infection during the second trimester leads to foetal death and mummification
**Infection during the last trimester leads to a weak or stillborn lamb
**Aborted ewes show focal necrotic placentitis with white lesions in the cotyledons and foetal tissue
**Diagnosis is confirmed by Giemsa and serology of the ewe's blood
Prevention:
*Clinical outbreaks of toxoplasmosis are '''sporadic'''
**Immunity is acquired before tupping
**Significant ill-effects are unlikely if immune ewes are infected during pregnancy
**Not shed from sheep to sheep so predicting outbreaks is difficult
*Sheep
**Toxovax vaccine
***Live, avirulent strain of ''Toxoplasma''
***Does not form bradyzoites or tissue cysts
***Killed by host immune system
***Single dose given 6 weeks before tupping
***Protects for 2 years
***Immunity boosted by natural challenge
**Medicated feed can be given daily during the main risk period
***14 weeks before lambing
**The best method of protection is to prevent cats from contaminating the pasture, lambing sheds and feed stores
[[Category:Tissue_Cyst_Forming_Coccidia]][[Category:Sheep]]
**Mostly asymptomatic
**However, if a non-immune ewe is infected during pregnancy the consequences will be serious
***Infection during the first trimester leads to resorption
**Infection during the second trimester leads to foetal death and mummification
**Infection during the last trimester leads to a weak or stillborn lamb
**Aborted ewes show focal necrotic placentitis with white lesions in the cotyledons and foetal tissue
**Diagnosis is confirmed by Giemsa and serology of the ewe's blood
Prevention:
*Clinical outbreaks of toxoplasmosis are '''sporadic'''
**Immunity is acquired before tupping
**Significant ill-effects are unlikely if immune ewes are infected during pregnancy
**Not shed from sheep to sheep so predicting outbreaks is difficult
*Sheep
**Toxovax vaccine
***Live, avirulent strain of ''Toxoplasma''
***Does not form bradyzoites or tissue cysts
***Killed by host immune system
***Single dose given 6 weeks before tupping
***Protects for 2 years
***Immunity boosted by natural challenge
**Medicated feed can be given daily during the main risk period
***14 weeks before lambing
**The best method of protection is to prevent cats from contaminating the pasture, lambing sheds and feed stores
[[Category:Tissue_Cyst_Forming_Coccidia]][[Category:Sheep]]