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| + | #REDIRECT[[:Category:Tissue Cyst Forming Coccidia]] |
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| − | |linkpage =Parasites
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| − | |linktext =PARASITES
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| − | |sublink1=Protozoa
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| − | |subtext1=PROTOZOA
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| − | <br>
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| − | ==Toxoplasma==
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| − | *1 major pathogenic species called ''Toxoplasma gondii''
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| − | *Causes disease in a wide range of animal species including humans
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| − | *Important cause of abortion in sheep
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| − | *Zoonotic
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| − | **Can cause abortion
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| − | **Can cause congenitally aquired defects
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| − | *Forms a sporulated oocyst which is only 10μm
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| − | **Contains 2 sporocysts with 4 sporozoites
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| − | *Transmission through ingesting the intermediate host or via the faecal-oral route
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| − | '''Life Cycle'''
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| − | *Complex
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| − | *Usually indirect
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| − | *Gametogeny (sexual stage) is host specific for felids
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| − | *Any warm blooded animal can act as a facultative intermediate host
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| − | **Asexual reproduction occurs in the intermediate host forming tissue cysts
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| − | **Intermediate host swallows sporulated oocysts or tissue cysts
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| − | **Can be transferred between intermediate hosts by carnivorism
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| − | Toxoplasma can cause [[Pancreas Inflammatory - Pathology#Acute haemorrhagic pancreatitis|acute interstitial pancreatitis]] in systemic toxoplasmosis
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| − | *''T. gondii'' in [[Respiratory Parasitic Infections - Pathology#Toxoplasmosis|pneumonia]]
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| − | *''Toxoplasma gondii'', ''Sarcocystis'' and ''Neospora caninum'' in [[Muscles Inflammatory - Pathology#Protozoa|myositis]]
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| − | ==Sarcocystis==
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| − | *Most infections are asymptomatic
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| − | *Heavy infections are causes of chronic wasting in large animals, hide sondemnation and downgrading of carcasses
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| − | *''Sarcocystis'' should be differentiated from other tissue-cyst forming coccidia
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| − | *There are many species of ''Sarcocystis''
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| − | *Sporulated oocyst has 2 sporocysts containing 4 sporozoites
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| − | **Naked oocyst usually seen in faeces as the oocyst wall is very delicate
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| − | *Indirect life cycle
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| − | *Life cycle alternates between the final and the obligatory intermediate host
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| − | *Only one final and one intermediate host
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| − | ==Neospora==
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| − | *2 main species
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| − | **''Neospora caninum'' in the dog
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| − | **''Neospora hughesi'' in the horse
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| − | *Sporulated oocysts measuring just 10μm
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| − | *Oocyst contains 2 sporocysts with 4 sporozoites
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| − | *Life cycle similar to ''Toxoplasma gondii''
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| − | *Limited range of warm-blooded intermediate hosts
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| − | **Asexual reproduction occurs in intermediate host forming tissue cysts
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| − | *Host range of sexual stage is unknown for ''N.caninum''
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| − | **Intermediate host for ''N.hughesi'' is the horse, but the definitive host is unknown
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| − | *Route of transmission not fully understood
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