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→Coccidia of Poultry
==Coccidia of Poultry==
==Coccidia of Poultry==
[[Image:Buff orpington.jpg|thumb|right|150px|Buff orpington - nabrown RVC]]
[[Image:Buff orpington.jpg|thumb|right|150px|Buff orpington - nabrown RVC]]
*Direct life cycle
*1 week prepatent period
*After oocysts are ingested, sporozoites are released which penetrate the intestinal epithelium
*2 asexual phases of multiplication called schizongony occur followed by a phases of sexual multiplication called gametogeny
*Zygote develops an oocyst which is shed in the faeces
**Oocyst measures 20-30μm
*For each oocyst ingested, thousands are shed
*Life cycle is '''self-limiting'''
**Organisms from a single infection go through the sequence of developmental stages synchronously
**Organisms leave the body simultaneously as oocysts
*Oocysts are only infective once they have sporulated
**Sporulation requires warmth, moisture and oxygen
**Takes 2-3 days in broiler houses
*Oocysts contain 4 sporocysts each with 2 sporozoites
'''Pathogenesis'''
'''Diagnosis'''
'''Immunity'''
'''Epidemiology'''
'''Control'''
==Other Avian Coccidia==
==Other Avian Coccidia==