legionella Flashcards

1
Q

legionella pneumophila son bacilos gram_

A

negativos

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2
Q

V/F: legionella pneumophilia son plemorficos (pueden ser bacilos o cocobacilos)

A

verdadero

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3
Q

metabolicamente, L. pneumophila son:

A

aerobios obligados

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4
Q

V/F: L. pneumophila son intracelulares facultativos

A

verdadero

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5
Q

qué implica que una bacteria sea intracelular?

A
  • se multiplican en macrofagos
  • inhiben la union a fagolisosomas
  • estimulan liberacion de quimiocinas y citocinas
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6
Q

la eliminacion de L. pneumophila depende de:

A

linfocitos TH1

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7
Q

el diagnostico de L. pneumphila se realiza mediante:

A

tincion por anticuerpos fluorescentes directos o por busqueda de antígenos de LPS en orina

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8
Q

V/F: L. pneumophila son saprofitos acuaticos ubicuos

A

verdadero

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9
Q

L. pneumophila puede crecer en:

A

reservas de agua, sistemas de refrigeración, aires acondicionados, saunas y vapores

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10
Q

enfermedades clinicas por L. pneumophila

A
  • fiebre de Pontiac

- neumonia (enfermedad de los legionarios)

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11
Q

en la fiebre de Pontiac se presenta un cuadro:

A

no neumonico, no tiene que ver con una enfermedad respiratoria

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12
Q

la fiebre de Pontiac tiene una duración de:

A

2-5 días

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13
Q

la fiebre de Pontiac se debe a:

A

la endotoxina de L. pneumophila

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14
Q

neumonia multilobular con formación de microabscesos producida por L. pneumophila

A

enfermedad de los legionarios

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15
Q

existe vacuna para L. pneumophila?

A

no

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16
Q

tratamiento para la fiebre de Pontiac?

A

no requiere tratamiento

17
Q

tratamiento de eleccion para L. pneumophila

A

macrolidos y fluoroquinolonas

18
Q

V/F: los betalactamicos penetran a los macrofagos

A

falso, no los penetran

19
Q

forma de legionella pneumophila

A

bacilos delgados y pleomorficos