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[[Coccidiosis]]
 
[[Coccidiosis]]
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[[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.''
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*The '''oocyst''' is the resistant stage in the environment
 
*The '''oocyst''' is the resistant stage in the environment
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==Coccidia of Poultry==
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[[Coccidia - Poultry]]
[[Image:Buff orpington.jpg|thumb|right|150px|Buff orpington - nabrown RVC]]
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[[Image:Eimeria Sporulated.jpg|thumb|right|150px|Sporulated ''Eimeria'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
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*Direct life cycle
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*1 week prepatent period
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*After oocysts are ingested, sporozoites are released which penetrate the intestinal epithelium
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*2 asexual phases of multiplication called schizogony occur followed by a phase of sexual multiplication called gametogony
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*Zygote develops into an oocyst which is then shed in the faeces
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**Oocyst measures 20-30μm
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*For each oocyst ingested, thousands are shed
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*Life cycle is '''self-limiting'''
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**Organisms from a single infection go through the sequence of developmental stages synchronously
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**Organisms leave the body simultaneously as oocysts
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*Oocysts are only infective once they have sporulated
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**Sporulation requires warmth, moisture and oxygen
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**Takes 2-3 days in broiler houses
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*Oocysts contain 4 sporocysts each with 2 sporozoites
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[[Coccidiosis - Poultry]]
 
'''Pathogenesis'''
 
'''Pathogenesis'''
 
*7 important ''Eimeria'' species
 
*7 important ''Eimeria'' species
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