[[Image:Isospora suis (pig).jpg|thumb|right|150px|''Isospora suis'' from a pig - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
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[[Image:Isospora.jpg|thumb|right|150px|''Isospora'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
[[Image:Coccidia.jpg|thumb|right|150px|Coccidia - Joel Mills]]
[[Image:Coccidia.jpg|thumb|right|150px|Coccidia - Joel Mills]]
''The following refers specifically to the life cycle of Coccidia spp.''
''The following refers specifically to the life cycle of Coccidia spp.''
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==''Isospora'' spp.==
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[[Isospora spp.|''Isospora'' spp.]]
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*Many species occur
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*All species are host specific
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*Sporulated oocyst contains 2 sporocysts each with 4 sporozoites
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**Oocyst measures 20-50μm
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*Usually direct life cycle
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**Transmission via the oral-faecal route
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*Some species use facultative intermediate hosts and form tissue cysts
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**Transmission via faecal-oral route or by ingestion of the intermediate host