Staphylococcus Flashcards

1
Q

Caracteristicas.

A

cocos, inmoviles, anerobios facultativos, gram positivo en racimos, no forman esporas, fermentadores de azucar sin producir gas.

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2
Q

Especies de importancia clinica.

A

aureus, epidermidis, saprophyticus, haemolyticus, lugdunensis, SARM.

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3
Q

Mecanismos de virulencia. (aureus)

A

capsula de polisacaridos e protege contra fagocitosis, Biopelicula hidrosoluble, adhesion en tejidos, cateter, injertos.

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4
Q

Produccion de enzimas.

A

Catalasa = destrucion del agua oxigenada (forma burbujas).
Coagulasa = coagula el plasma, activa la protrombina que transforma el fibrinogeno en fibrina. Nucleasa, hialuronidasa, fibrinolisina, lipasas.

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5
Q

Resistencia a antimicrobianos.

A

producen b-lactamasa, resiste a varias penicilinas como a meticilina, se transmite la resistencia por plasmidos.

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6
Q
A
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