Strep Pyogenes Flashcards

1
Q

Invasinas de strep pyogenes

A

Estreptolisina S - no inmune
Estreptolisina O - inmune
Estreptoquinasa - coágulos
ADNasas - reduce viscosidad de abscesos

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2
Q

Factores de virulencia strep pyogenes

A

Cápsula de ácido hialuronico
Invasinas - S, O, Estreptoquinasa y ADNasa.
Proteína M (adhesina)
Toxinas SPE(A, B, C, F)

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3
Q

Proteína M

A

Adhesina que se adhiere a la piel y mucosa faringea. También inhibe fagocitocis.

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4
Q

Invasina Estreptolisina S

A

Beta hemolisis
No inmune

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5
Q

Invasina Estreptolisina O

A

Inmune
AntiASO

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6
Q

Invasinas Estreptocinasas

A

Lisis de coágulos de fibrina

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7
Q

Invasina ADNasa

A

Reduce viscosidad de abscesos

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8
Q

Toxinas estreptococicas (Spe)

A

Streptococcal pyrogenic exotoxin - son superantigenos que generan una respuesta excesiva del sistema inmune.
SpeA
SpeB
SpeC
SpeF

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9
Q

Strep pyogenes qué coloniza?

A

Piel, faringe, vagina y recto. Pyogenes afinidad a mucosas.

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10
Q

Fiebre reumática por faringitis estreptococica

A

Causada después de una infección por strep pyogenes en faringe.
J - Joint inflamation
❤️ - daño al corazón
N - Nódulos en la piel
E - Eritema marginado
S - sydenham chorea

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11
Q

Complicaciones Faringitis estreptocócica

A

Escarlatina (lengua en fresa y eritema que evita triángulo de filatov)
Fiebre reumática (JONES)
Glomerulonefritis post estreptocócica
Abscesos profundos en faringe

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12
Q

Características de Strep pyogenes

A

Gram positiva en cadena corta
Beta hemólisis
Adhesinas & Invasinas
Cápsula
Toxinas: SPE (streptococcal pyrogenic exotoxin) A, B, C, F

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13
Q

Manifestaciones clínicas de Strep pyogenes

A

Impétigo
Erysipelas
Gangrena
Celulitis
Faringitis estreptocócica
Sx choque tóxico estreptocócico

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