Streptococcus Flashcards

1
Q

Streptococcus pyogenes

Biología y virulencia

A

Cocos gram + de cadenas cortas
Grupo A (Antígeno A)
proteína M parte de la pared celular.
B hemoliticos

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2
Q

Pyogenes

Evasión de de respuesta inmune

A

Cápsula de ac hialuronico
Proteína M evita fagocitosis
Se adhiere a epitelios por proteína M

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3
Q

Exotoxinas estreptococicas piogenicas (Spe)

A

SpeA, SpeB, SpeC ——-> superantigenos

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4
Q

Streptococcus

Tipos

A

Alfa, beta y gamma hemoliticos

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5
Q

GAS Y GBS

A

Estreptococos beta hemoliticos de grupo A(pyogenes) y grupo B(Agalactia)

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6
Q

Streptococcus características

A

Cocos gram +
Anaeróbicos facultativos
fermentadores productores de ac láctico
Catalasa -

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7
Q

Pyogenes

Toxinas invasinas.

A

Estreptolisin S—-> hemolisina no inmune
Estreptolisina O——> inmune anti Aso( anticuerpos ) (no en cutáneos)
Estreptocinasas—-> liman coágulos de sangre y fibrina
Adnasas—-> reduce viscosidad de abscesos

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8
Q

Pyogenes

Enfermedades supurativas

A

Faringitis
Escarlatina (complicación de faringitis pero no es supurativa)
Erisipelas
Fascitis necrosante
Impetigo,celulitis( más común por staph)
Sx del shock estreptococico —-> por SpeA y SpeC

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9
Q

Pyogenes

Enfermedades no supurativas

A

Fiebre reumática

Glomerulonefritis

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10
Q

Streptococcus agalactie

Biología y virulencia

A

Cocos gram+
Grupo B (antígeno B)
Beta hemoliticos

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11
Q

Agalactiae

Epidemio

A

GI inferior y región genitourinaria

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12
Q

Agalactiae

Enfermedades

A

Septicemia puerperal, parto prematuro , sepsis prenatal.

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13
Q

Streptococcus Viridians

Biología y virulencia

A

Alfa hemoliticos
5 grupos
Mitis, mutans, salivarius, bovis, angionosus

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14
Q
Streptococcus pneumoniae (neumococo)
(Biología y virulencia)
A

Diplococos gram +
Alfa hemoliticos
Cápsula

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15
Q

Npeumoniae

Enfermedades

A

Invasiva—-> neumonía, becteriemia, meningitis

No invasiva——> neumonía, sinusitis

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