
Bacteriología 2
Flashcard
•
Health Sciences
•
University
•
Practice Problem
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Easy
Ma Larios
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49 questions
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1.
FLASHCARD QUESTION
Front
Bacterias patógenas en tracto gastrointestinal
Back
E. coli
Campylobacter jejuni
Vibrio cholerae
Shigella
Salmonella
Yersinia enterocolitica
2.
FLASHCARD QUESTION
Front
Cantidad recomendada para una muestra fecal
Back
2g o del tamaño de una nuez
3.
FLASHCARD QUESTION
Front
Tubo y condiciones de transporte para muestra fecal
Back
Cary-Blair, refrigerar a 4°C si no se procesa antes de 2 hrs
4.
FLASHCARD QUESTION
Front
Tipos de Escherichia coli como patógenos gastrointestinales
Back
ETEC, EPEC, EHEC, EIEC, EAEC
5.
FLASHCARD QUESTION
Front
ETEC
Back
-Diarrea del viajero (acuosa)
-Fimbrias (coloniza I.D.)
-Enterotoxinas
Termolábil (TL): act. adenilato ciclasa (parecida a V. cholerae)
Termoestable (ST): act. guanilato ciclasa
6.
FLASHCARD QUESTION
Front
Mecanismo de acción de la enterotóxina termolábil
Back
Estructura similar a la toxina del cólera: subunidad A (activa) y subunidades B (5, para unión).
Las subunidades B se unen a gangliósidos GM1 en la membrana de la célula epitelial.
La subunidad A entra a la célula → activa la adenilato ciclasa.
> aumenta los niveles de AMPc intracelular
Provoca hipersecreción de agua y electrolitos en el intestino → diarrea acuosa.
7.
FLASHCARD QUESTION
Front
EIEC
Back
-Diarrea con moco y sangre
-Invade epitelio intestinal por mucinas y adhesinas
-Plásmido de invasión (plnv)
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