strep pyogenes Flashcards

1
Q

morfología pyogenes

A
  • Coco grampositivo
  • Cadenas largas
  • No móvil
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2
Q

características especiales pyogenes

A
  • Beta-hemólisis completa
  • Sensible a bacitracina
  • Grupo A de Lancefield
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3
Q

factores de virulencia s pyogenes

A

capsula, ac lipoteicoico, peroteína de union a la fibronectina, proteína M, hialuronidasa, estreptolisina O y S, exotoxinas pirogénicas

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4
Q

proteína M

A

adhesion

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5
Q

estreptolisinas S y O

A

hemolisinas

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6
Q

exotoxinas pirogénicas

A

SpeA, SpeB, Spe, C
hemólisis
A y C superantígenos

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7
Q

contagio pyogenes

A
  • Gotas respiratorias
  • Contacto directo
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8
Q

infecciones strep pyogenes

A
  • Faringitis estreptocócica (angina)
  • Escarlatina
  • Impétigo
  • Fascitis necrotizante
  • Fiebre reumática
  • Glomerulonefritis postestreptocócica
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9
Q

dx pyogenes

A

Cultivo de exudado faríngeo
- Pruebas rápidas de antígeno
- Tinción de Gram

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