Listeria Flashcards

1
Q

Características

A
Bacilos cortos con extremos redondeados 
Gram positivos 
En pares 
Anaerobio facultativo 
Beta hemolitico 
Motiles 
Productor de ácido 
Hidroliza la esculina
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2
Q

Especie más importante

A

Monocytogenes

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3
Q

Cuantas especies hay

A

6

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4
Q

Catalasa y oxidase

A

Positivo (c)

Negativo (o)

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5
Q

Reservorio natural

A

Suelo ( medio ambiente)

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6
Q

Como te contagias

A

Alimentos contaminados con heces de animales

Inhalados

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7
Q

Portadores intestinales

A

Ovejas ganando aves peces

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8
Q

Como se presenta

A

De forma esporádica

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9
Q

Población expuesta

A
Neonatos embarazadas 
Sida 
Postransplantados 
Diabéticos 
Más de 60 años
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10
Q

Periodo de incubación

A

2-3 meses

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11
Q

Puede Causar

A

Infecciones gastrointestinales y uterinas

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12
Q

En recién nacido causa

A

Meningitis y sepsis y granulomatosis

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13
Q

Causa

A

Enfermedad leve tipo gripal

Listeriosis cutánea primaria

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14
Q

En base a que se hace la diferenciación de 13 serio tipos de monocytogenes

A

Ácido lipoteicoico

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15
Q

Factor de virulencia (proteína de superficie)

A

Internalina

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16
Q

Componente de la pared celular antigenico

A

Glicérido A

17
Q

Clave para diagnóstico

A

Tincion de gram

18
Q

Agar

A

Caldo tripticasa de soya antes de inocular en agar sangre de carnero o agar Columbia con colistina y ácido naldixico

19
Q

Colonias

A

Pequeñas translúcidas y lisas a los dos días

20
Q

Camp

A

Positivas

21
Q

Tratamiento

A

Ampicilina

Penicilina
Eritromicina
Tmt/smx