Changes

[[Image:Buff orpington.jpg|thumb|right|150px|Buff orpington - nabrown RVC]]

[[Image:Buff orpington.jpg|thumb|right|150px]] [[Image:Eimeria Sporulated.jpg|thumb|right|150px]]  

[[Image:Eimeria Sporulated.jpg|thumb|right|150px|Sporulated ''Eimeria'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]

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.

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.  

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.

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.  

*Direct life cycle

*Direct life cycle

*2 asexual phases of multiplication called schizogony occur followed by a phase of sexual multiplication called gametogony

*2 asexual phases of multiplication called schizogony occur followed by a phase of sexual multiplication called gametogony

*Zygote develops into an oocyst which is then shed in the faeces

*Zygote develops into an oocyst which is then shed in the faeces  

**Oocyst measures 20-30μm

**Oocyst measures 20-30μm

*For each oocyst ingested, thousands are shed

*For each oocyst ingested, thousands are shed

*Life cycle is '''self-limiting'''

*Life cycle is '''self-limiting'''  

**Organisms from a single infection go through the sequence of developmental stages synchronously

**Organisms from a single infection go through the sequence of developmental stages synchronously  

**Organisms leave the body simultaneously as oocysts

**Organisms leave the body simultaneously as oocysts

*Oocysts are only infective once they have sporulated

*Oocysts are only infective once they have sporulated  

**Sporulation requires warmth, moisture and oxygen

**Sporulation requires warmth, moisture and oxygen  

**Takes 2-3 days in broiler houses

**Takes 2-3 days in broiler houses

*Oocysts contain 4 sporocysts each with 2 sporozoites

*Oocysts contain 4 sporocysts each with 2 sporozoites

[[Coccidiosis - Poultry]]

[[Coccidiosis - Poultry]]  

==Test yourself with the Coccidia Flashcards==

== Test yourself with the Coccidia Flashcards ==

[[Coccidia_Flashcards|Coccidia Flashcards]]

[[Coccidia Flashcards|Coccidia Flashcards]]  

[[Category:Coccidia]][[Category:Poultry]]

[[Category:Coccidia]] [[Category:Avian Parasites]] [[Category:To_Do_-_Clinical]] [[Category:To_Do_-_Parasites]]

[[Category:To_Do_-_Clinical]][[Category:To Do - Parasites]]