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- Polioencephalomalacia abstract "Polioencephalomalacia (PEM) literally means softening of the cerebrocortical grey matter distributed in a laminar (layered) pattern. It is also called cerebrocortical necrosis (CCN), laminar cortical necrosis or cortical necrosis. PEM is a sporadic disease of unknown cause occurring in cattle, sheep and goats. PEM is most commonly seen in cattle at 6–18 months of age when fed concentrate rations. Sheep are usually affected at 2–7 months of age. The lesion is associated with thiamine deficiency or a disturbance in thiamine metabolism. Ruminants are supplied with thiamine by synthetic activity of ruminal bacteria. PEM most commonly develops in cattle fed carbohydrate-rich and roughage-poor rations, which leads to subclinical lactic acidosis, and hence an alteration in ruminal microflora. Other mechanisms for disturbances in thiamine deficiency include:- Destruction of thiamine within the gastrointestinal tract (for example by thiaminases in bracken fern)- Inactivation of thiamine by excess sulfates or sulfides or elemental sulfur- Production of inactive thiamine analogues- Decreased thiamine absorption- Increased faecal excretion of thiamineInfection with Trypanosoma congolense can also cause focal PEM in the final stages of disease, likely due to ischemia from accumulation of parasites in the terminal capillaries of the brain.Clinical signs of PEM are variable depending on the area of the cerebral cortex affected and may include head pressing, dullness, opisthotonos, central blindness, anorexia, muscle tremors, teeth grinding, trismus, salivation, drooling, convulsions, nystagmus, clonic convulsions, and recumbency. Early administration of thiamine may be curative, but if the lesion is more advanced, then surviving animals may remain partially blind and mentally dull.".
- Polioencephalomalacia wikiPageExternalLink polio.htm.
- Polioencephalomalacia wikiPageExternalLink 102000.htm.
- Polioencephalomalacia wikiPageExternalLink polio.html.
- Polioencephalomalacia wikiPageID "4521853".
- Polioencephalomalacia wikiPageLength "2753".
- Polioencephalomalacia wikiPageOutDegree "25".
- Polioencephalomalacia wikiPageRevisionID "650884996".
- Polioencephalomalacia wikiPageWikiLink Asymptomatic.
- Polioencephalomalacia wikiPageWikiLink Bacteria.
- Polioencephalomalacia wikiPageWikiLink Blindness.
- Polioencephalomalacia wikiPageWikiLink Bracken.
- Polioencephalomalacia wikiPageWikiLink Bracken_fern.
- Polioencephalomalacia wikiPageWikiLink Carbohydrate.
- Polioencephalomalacia wikiPageWikiLink Category:Bovine_diseases.
- Polioencephalomalacia wikiPageWikiLink Category:Sheep_and_goat_diseases.
- Polioencephalomalacia wikiPageWikiLink Cattle.
- Polioencephalomalacia wikiPageWikiLink Convulsion.
- Polioencephalomalacia wikiPageWikiLink Cortical_laminar_necrosis.
- Polioencephalomalacia wikiPageWikiLink Cortical_pseudolaminar_necrosis.
- Polioencephalomalacia wikiPageWikiLink Dietary_fiber.
- Polioencephalomalacia wikiPageWikiLink Goat.
- Polioencephalomalacia wikiPageWikiLink Grey_matter.
- Polioencephalomalacia wikiPageWikiLink Head_pressing.
- Polioencephalomalacia wikiPageWikiLink Lactic_acidosis.
- Polioencephalomalacia wikiPageWikiLink Microbiota.
- Polioencephalomalacia wikiPageWikiLink Microflora.
- Polioencephalomalacia wikiPageWikiLink Nystagmus.
- Polioencephalomalacia wikiPageWikiLink Pathologic_nystagmus.
- Polioencephalomalacia wikiPageWikiLink Roughage.
- Polioencephalomalacia wikiPageWikiLink Rumen.
- Polioencephalomalacia wikiPageWikiLink Sheep.
- Polioencephalomalacia wikiPageWikiLink Subclinical.
- Polioencephalomalacia wikiPageWikiLink Sulfate.
- Polioencephalomalacia wikiPageWikiLink Sulfide.
- Polioencephalomalacia wikiPageWikiLink Sulfur.
- Polioencephalomalacia wikiPageWikiLink Thiaminase.
- Polioencephalomalacia wikiPageWikiLink Thiamine.
- Polioencephalomalacia wikiPageWikiLink Trypanosoma_congolense.
- Polioencephalomalacia wikiPageWikiLink Visual_impairment.
- Polioencephalomalacia wikiPageWikiLinkText "Polioencephalomalacia".
- Polioencephalomalacia wikiPageWikiLinkText "polioencephalomalacia".
- Polioencephalomalacia hasPhotoCollection Polioencephalomalacia.
- Polioencephalomalacia wikiPageUsesTemplate Template:Distinguish.
- Polioencephalomalacia wikiPageUsesTemplate Template:Reflist.
- Polioencephalomalacia wikiPageUsesTemplate Template:Veterinary-med-stub.
- Polioencephalomalacia subject Category:Bovine_diseases.
- Polioencephalomalacia subject Category:Sheep_and_goat_diseases.
- Polioencephalomalacia type Thing.
- Polioencephalomalacia comment "Polioencephalomalacia (PEM) literally means softening of the cerebrocortical grey matter distributed in a laminar (layered) pattern. It is also called cerebrocortical necrosis (CCN), laminar cortical necrosis or cortical necrosis. PEM is a sporadic disease of unknown cause occurring in cattle, sheep and goats. PEM is most commonly seen in cattle at 6–18 months of age when fed concentrate rations. Sheep are usually affected at 2–7 months of age.".
- Polioencephalomalacia label "Polioencephalomalacia".
- Polioencephalomalacia differentFrom Poliomyelitis.
- Polioencephalomalacia sameAs Zerebrokortikalnekrose.
- Polioencephalomalacia sameAs Hjernebarksår.
- Polioencephalomalacia sameAs m.0c6ywm.
- Polioencephalomalacia sameAs Q191571.
- Polioencephalomalacia sameAs Q191571.
- Polioencephalomalacia wasDerivedFrom Polioencephalomalacia?oldid=650884996.
- Polioencephalomalacia isPrimaryTopicOf Polioencephalomalacia.