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USMLE > Bloody Diarrhea > Flashcards

Bloody Diarrhea Flashcards

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USMLE® Step 1 flashcards
1
Q

Bloody diarrhea

A 
Campylobacter
Entamoeba histolytica
Enterohemorrhagic E. coli
Enteroinvasive E. coli
Salmonella
Shigella
Yersinia enterocolitica
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2
Q

Campylobacter

A

Comma- or S-shaped organisms

Growth at 42 degrees C

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3
Q

Entamoeba histolytica

A

Protozoan
Amebic dysentery
Liver abscess

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4
Q

Enterohemorrhagic E. coli

A

O157:H7
Can cause HUS
Makes Shiga-like toxin

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5
Q

Enteroinvasive E. coli

A

Invades colonic mucosa

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6
Q

Salmonella

A

Lactose -
Flagellar motility
Animal reservoir = poultry and eggs

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7
Q

Shigella

A 
Lactose -
Very low ID50
Produces Shiga toxin 
Human reservoir only
Bacillary dysentery
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8
Q

Yersinia enterocolitica

A

Daycare outbreaks

Pseudoappendicitis

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USMLE (38 decks)

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