Streptococcus pneumonoiae (neumococo) - Cocos Gram + Flashcards

1
Q

Generalidades (4)

A
  • encapsulado
  • diplococos o cadenas cortas
  • alfa hemólisis en agar sangre (por neumolisina)
  • requiere de medios enriquecidos
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2
Q

Alfa, beta, gamma hemoliticas?

Optiquina sensible o resistente?

A
  • Alfa hemolitica
  • Optoquina sensible
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3
Q

El aspecto de las colonias depende de su…

A

Cápsula

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4
Q

En que ayuda la cápsula? (2)

A
  • identificación serotipos capsulares
  • polisacaridos capsulares empleados para vacunas
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5
Q

Cápsula (2)

A
  • principal determinante patogenico
  • inhibe fagocitosis
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6
Q

Que coloniza esta bacteria? (2)

A
  • Bucofaringe y nasofaringe
  • Adhesinas de superficie
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7
Q

Proteasa de IgA

A

Inhibe la unión con el anticuerpo

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8
Q

Neumolisina

A

Crea poros en las células del hospedero

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9
Q

Acido teicoico y peptidoglucano

A

Fuertes promotores de quimiotaxis

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10
Q

Enfermedad por neumococo

Invasiva (2)

A
  • meningitis
  • bacteraemia
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11
Q

Enfermedad por neumococo

No invasiva (mucosa) (3)

A
  • neumonía
  • sinusitis
  • otitis media aguda
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12
Q

Causa #1 de… (4)

A
  • neumonía bacteriana típica
  • otitis, sinusitis (según vacunación)
  • meningitis bacteriana
  • bacteriemias espontaneas
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13
Q

Resistencia

A

modificaciones de su diana (PBP)

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14
Q

Como se presentará un px con esta bacteria?

A

Px con:

  • neumonía típica (fiebre, dificultad para respirar, grave)
  • otitis media, sinusitis
  • meningitis
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15
Q

Preguntas que podrían hacer: (6)

A
  • sensible a optoquina
  • vacuna de polisacaridos
  • diplococos, cadenas cortas
  • a-hemoliticos
  • resistencia por modificar diana (pbp)
  • neumolisina
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