Encefalopatias Espongiformes Transmissiveis ( EET ) Flashcards

1
Q

EET

A

sao doencas neurodegenerativas que acometem o SNC , sao causadas pelo acumulo de uma proteina anormal que se origina apartir de uma proteina normal.

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2
Q

Ocorrencia

A

Varias especies ( apos instalacao do quadro clinico e invariavelmente fatal )

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3
Q

Enfermidades de destaque

A

-Doenca de Creutzfeld-Jacob (DCJ) e uma EET que afeta humanos.
-DCJ iatrogenica ( devido a transmissao de individuo infecatdo a outro ; por instrumentos cirurgicos…)
-DCJ familiar ( predisposicao genetica a desenvolver a doenca)
-DCJ nova variante ( zoonose, associada a alimentos contaminados.)
-EEB ( doenca da vaca louca)
-Scrapie ( afeta ovinos e caprinos)

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4
Q

periodo de incubacao

A

meses a anos

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5
Q

SC

A

mudancas no comportamento, sinais neurologicos, prurido intenso (scrapie)

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6
Q

Diagnostico

A

Western blotting e imuno-histoquimica

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7
Q

Caracteristicas etiologicas

A

Proteinas infecciosas: EEB forma classica e atipica ( H-EEB e L-EEB)
Scrapie: forma classica e atipica (Nor98)

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8
Q

Prevencao

A

nao alimentacao das especies susceptiveis com tecidos que possam conter prions

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9
Q

MER bovinos

A

tonsilas ( palatinas e linguais), ileo distal, encefalo, medula espinhal, olhos

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10
Q

Mer ovinos/caprinos

A

cabeca ( excluido a lingua e os musculos), olhos, tonsilas palatinas e linguais, encefalo e as partes osseas, medula espinha e baco

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11
Q

Patogenia

A

nao ha lesoes patognomonicas.
Lesao: usualmente simetrica e bilateral, mudancas espongiformes nao inflamatorias, com vacuolizacao neural e variados graus de astrocitose

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12
Q

resistencia

A

resistentes a desinfetantes, calor, radiacao ultravioleta, micro-ondas, radiacao ionizante

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13
Q

inativacao fisica

A

autoclave de carga porosa a 134 C por 18 min a 30 lb

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