Fiebre de las Montañas Rocosas Flashcards

1
Q

Agente etiológico de la Fiebre de las Montañas Rocosas (fiebre manchada)

A

rickettsia rickettsii

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2
Q

Distribución de R. ricketsii

A

America (norte, sur y centro)

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3
Q

Vector de R. ricketsii

A
Dermacentor  andersoni
Dermacentor  variabilis
Rhipicephalus  sanguineus
Amblyomma  americanum
Amblyomma  cajennense
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4
Q

Manifestaciones más frecuentes de R. ricketsii

A
Fiebre
Cefalea
Mialgia 
Confusión 
vómitos 
Anorexia 
Exantema
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5
Q

Tipos de Rash que causa R. ricketsii

A
  1. Maculopapular: (Flat, confluent, red spots (macules) covered withsmall, raised bumps (papules)
  2. Petequial: Small, flat, red or purple spots of <3 mm diameterwhich do not blanche upon the application ofpressure
  3. Vesicular: Raised blisters or vesicles filled with clear, serousfluid
  4. Pustular: Raised blisters or vesicles filled with purulentfluid (pus)
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6
Q

Manifestaciones menos frecuentes de R. ricketsii

A

Dolor abdominal, tos y diarrea

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7
Q

Pruebas dx de R. ricketsii

A
  • inmunofluorescencia indirecta
  • Fijación del complemento
  • Aglutinación de latex
  • Microaglutinación
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8
Q

Tratamiento de R. ricketsii

A
  • Doxiciclina

- Alergicos a doxiciclina = Clranfenicol

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9
Q

Cuales son las proteínas procoagulantes de R. ricketsii

A

Calicreinas

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10
Q

Molécula a la cual se une R. ricketsii a la célula

A

KV70 proteína kinasa dependiente de ADN

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11
Q

Proteínas de membrana externa de ricketsias

A

OmpA, OmpB, peptid b, ADRI2

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12
Q

Citocinas que incrementan en la fase aguda de ricketsiosis

A

IFN gamma, TNF alfa, IL10 y IL6

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13
Q

Que factores al elevarse activan a las células fagocitadas para que produzcan ROS y generar un estallido respiratorio del microorganismo

A

IFN gamma y TNF alfa

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14
Q

Proteínas de superficie de rickettsias que el sistema inmune reconoce e inducen a la producción de anticuerpos por parte del sistema inmune

A

Omp A y Omp B

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