Enterobacterias Flashcards

1
Q

Gram

A

negativos

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2
Q

Forma

A

Bacilos cortos

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3
Q

Fermentan

A

Glucosa

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4
Q

Catalasa

A

Positivos

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5
Q

Foman esporas?

A

No

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6
Q

Cómo son resistentes a antibióticos?

A

Por medio de adquisición

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7
Q

Cuáles no fermentan lactosa?

A

las que no forman parte de la microbiota
- Salmonalla
- Yersinia
- Shigella

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8
Q

Toxina compartida

A

LPS: Endotoxina potente

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9
Q

De qué son causa más frecuentemente?

A

Causa más frecuente de infecciones de las vías urinarias y gastroenteritis bacterianas.

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10
Q

Determinantes de virulencia

A
  • LPS: Endotoxina (lisis)
  • Cápsula: Inhibe fagocitosis
  • Evitan unión al complemento
  • Plasticidad génica
  • Variaciones antigénicas
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11
Q

Tratamiento

A
  • Pruebas de sensibilidad in vitro
  • Vacunas de S. Typhi
  • Vacunas vivas
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12
Q

Diagnóstico

A
  • Agar MacConkey
    • Selectivo: Inhibe Gram+
    • Diferencial: Fermantadores de lactosa (rosa), los que no (Amarillo)
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