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| − | [[Image:Buff orpington.jpg|thumb|right|150px|Buff orpington - nabrown RVC]] | + | #redirect[[Coccidiosis - Poultry]] |
| − | [[Image:Eimeria Sporulated.jpg|thumb|right|150px|Sporulated ''Eimeria'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
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| − | Domestic poultry and birds are affected by coccidia called Eimeria. Different species of Eimeria that effect poultry are host-specific – meaning that a species that infects chickens does not infect turkeys and vice versa.
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| − | Nine species of Eimeria infect chickens. The species important in broiler production include Eimeria tenella (90%), E. maxima, E. acervulina, and E. mivati; the species important in breeder and egg- layers are E. burnetti and E. necatrix. Seven species infect turkeys – the big three of concern are Eimeria meleagrimitis, E. adenoeides, and E. gallapovonis.
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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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| − | [[Category:Coccidia]][[Category:Poultry]]
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| − | [[Category:To_Do_-_Stuartd]]
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