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Muscles Inflammatory - Pathology (view source)
Revision as of 23:24, 9 April 2010
, 23:24, 9 April 2010no edit summary
====Protozoa====
====Protozoa====
*[[Tissue cyst-forming coccidia|'''''Toxoplasma gondii''''']]
*[[Toxoplasma|'''''Toxoplasma gondii''''']]
**Cats as final hosts
**Cats as final hosts
**Intermediate hosts, birds and mammals have tachyzoites throughout body, infrequently in skeletal muscle
**Intermediate hosts, birds and mammals have tachyzoites throughout body, infrequently in skeletal muscle
***Lymphocyte and plasma cell infiltration
***Lymphocyte and plasma cell infiltration
***In later stages bradyzoite cysts
***In later stages bradyzoite cysts
*[[Tissue cyst-forming coccidia|'''''Neospora caninum''''']]
*[[Neospora|'''''Neospora caninum''''']]
**Necrotising inflammation of muscles
**Necrotising inflammation of muscles
**Myositis more severe than in toxoplasmosis
**Myositis more severe than in toxoplasmosis
*[[Tissue cyst-forming coccidia|'''''Sarcocystis''''']]
*[[Sarcocystis|'''''Sarcocystis''''']]
**Histologically:
**Histologically:
***Merozoites causing focal and segmental [[Muscles Degenerative - Pathology#Necrosis|necrosis]]
***Merozoites causing focal and segmental [[Muscles Degenerative - Pathology#Necrosis|necrosis]]
*Possibly immunological cause
*Possibly immunological cause
*Single biopsy may not be enough to make the diagnosis as it tends to be multifocal and disseminated
*Single biopsy may not be enough to make the diagnosis as it tends to be multifocal and disseminated
*Lesions similar to some infectious causes (such as [[Tissue cyst-forming coccidia|''Toxoplasma gondii'']])
*Lesions similar to some infectious causes (such as [[Toxiplasma|''Toxoplasma gondii'']])
*Major cell involved is eosinphil
*Major cell involved is eosinphil
*Usually noticed at slaughter - green muscle discoloration
*Usually noticed at slaughter - green muscle discoloration
*May be caused by degenteration of [[Tissue cyst-forming coccidia|''Sarcocystis'' spp.]]
*May be caused by degenteration of [[Sarcocystis|''Sarcocystis'' spp.]]
*Grossly:
*Grossly:
**Green discolored areas, well demarcated
**Green discolored areas, well demarcated