Chagas/tripanosomiasis Flashcards

1
Q

Dx de chagas en la fase indeterminada o asintomatica

A

Los tripomastigotes no estan en sangre (baja parasitemia), el diagnostico es serologico (IgG detectable): ELISA, IFI

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2
Q

Forma infectante del trypanosoma cruzi

A

tripomastigote metaciclico

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3
Q

Porcentaje de pacientes infectados por tripanosoma cruzi que llegan a fase cronica

A

20-30%

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4
Q

Organos blanco del tripanosoma cruzi

A

Corazon y tubo digestivo

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5
Q

Presentaciones clinicas de Chagas cronico

A

Miocardiopatia (arritmias, insuf. cardiaca congestiva, bloqueos de rama, predominio DERECHO)
Megacolon (constipacion, distencion, colico abdominal)
Megaesofago (disfagia, regurgitacion, irritacion local)

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6
Q

Metodos diagnosticos de chagas cronico

A

Pruebas serologicas: ELISA, Inmunofluoresencia indirecta, hemoaglutinacion indirecta.

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7
Q

Que metodo directo se puede realizar en la fase cronica en chagas

A

XEnodiagnostico

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8
Q

Esquema de tx de la fase AGUDA de chagas

A

Nifurtimox 10mg/kg/d 90-120d

Benzonidazol 5mg/kg/d 60d

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9
Q

Animales hospederos de tipanosoma cruzi

A

mamifeos como perros, gatos, cerdos, cabras, roedores, murcielagos, marsupiales, xenartros (oso hormiguero, perezoso), mapaches, primates

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10
Q

LA infeccion por tripanosoma cruzi genera inmunidad

A

Si puede inducir inmunidad segun estudios en ratones

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11
Q

Para que sirve la reaccion de Guerreiro Machado

A

Mejor metodo diagnostico de la fase cronica

Fijacion del complemento al complejo antigeno-anticuerpo (via clasica)

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12
Q

Que estados son endemicos de Chagas

A

Chiapas, Oaxaca, Tabasco, Veracruz, Yucatan

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13
Q

Vector de Chagas/tripanosomiasis en Mexico

A

Triatoma dimidiata

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14
Q

Vector de Chagas/tripanosomiasis en SUdamerica

A

Triatoma Infestans

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15
Q

Dx de Chagas en la fase aguda

A

IgM no es util
Preparacion en fresco de sangre anticoagulada
Frotis de sangre periferica con Giemsa
HEmocultivo y xenodiagnostico; mas sensible pero mayor duracion para el resultado

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16
Q

Clinica de la fase aguda de Chagas

A

Fiebre, malestar general, mialgia, chagoma o signo de romaña