Streptococcus Pyogenes Flashcards

1
Q

Son Gram?

A

Positivos

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2
Q

Viven sin aire

A

Anaerobios facultativos

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3
Q

Con catalasa?

A

Negativo

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4
Q

Principal factor de virulencia

A

Proteína M

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5
Q

Que hace la estreptolisina

A

Lisa eritrocitos, plaquetas, leucocitos
La O es la sensible a oxígeno
La S estable a oxígeno

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6
Q

Que hace la estreptocinasa?

A

Degrada plasminogeno en plasmina, fibrina

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7
Q

Enfermedades supurativas ?

A

Faringitis, escarlatina, piodema (impetigo)
Celulitis
Fascitis necrosante
Sx de shock toxico

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8
Q

Enfermedades supurativas ?

A

Faringitis, escarlatina, piodema (impetigo)
Celulitis
Fascitis necrosante
Sx de shock toxico

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9
Q

Enfermedades no supurativas

A

Fiebre reumática.

Glomerulonefritis aguda

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10
Q

Cuanto tarda en aparecer la fiebre escarlatina?

A

De 24-48 Hrs

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11
Q

Signos de fiebre escarlatina?

A

Lengua en fresa, líneas de pastia

Descamación(5/7dias)

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12
Q

Diagnóstico?

A

Exudado Faringeo
Agar sangre hay beta hemolisis
En serologia: prueba de Ac contra estreptolisina O (prueba de aslo)

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13
Q

Complicacion de la faringitis?

A

Escarlatina

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14
Q

Entre la celulitis y la ericipela cual si se delimita?

A

La ericipela

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15
Q

Entre la celulitis y la ericipela cual afecta tejidos más profundos?

A

Celulitis y duele mas

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16
Q

Modo de transmisión?

A

Gotitas respiratorias o contacto con la herida

17
Q

Personas de riesgo

A

En faringitis :niños 5-15 años
Pioderma: niños de 2-5 años
SX Shock toxico : personas con infección en tejidos blandos

18
Q

Es sensible o resistente a bacitracina

A

Sensible pyogenes y resistente es s. Agalactiae

19
Q

Que estreptococcus son gamma hemolisis?

A

E. Faecalis, faecium creen en medio NaCl y E. bovis no crece en NaCl