Diarrhea

Question 1

Which is the most common organism of traveller’s diarrhea?

Answer 1

Enterotoxigenic Escherichia coli

Question 2

What are the lab findings of enterotoxigenic E.coli?

Answer 2

It yields pink colonies on MacConkey agar

Question 3

What is the characteristic of enteroinvasive E.coli?

Answer 3

Profuse diarrhea and high fever

Question 4

Is E.coli negative or positive?

Answer 4

Negative rod

Question 5

What is the most common organism of viral gastroenteritis?

Answer 5

Norovirus

Question 6

What are the symptoms of norovirus infection?

Answer 6

• NO mucus/blood
• Low grade fever
• Lethargy
• Vomit/nausea
• Watery diarrhea
• abdominal pain

Question 7

Which bacteria can cause diarrhea following treatment with antibiotics?

Answer 7

Clostridium difficile

Question 8

Name the most common associated finding with Clostridium difficile infection.

Answer 8

Pseudomembranous colitis

Question 9

Is Clostridium difficile negative or positive?

Answer 9

Positive bacilus

Question 10

Name the endocrine secreting hormone that causes watery diarrhea.

Answer 10

Vasoactive intestinal peptide (vip)

Question 11

What is the first line management in patients with entamoeba histolytica dysentery?

Answer 11

Oral Rehydration therapy

Question 12

What are some strong factors of cholera infection?

Answer 12

• Travel to South America
• Watery diarrhea
• Severe dehydration

Question 13

What is the first line management for giardia intestinalis?

Answer 13

Metronizadole

Question 14

What is the typical presentation of entamoeba histolytica dysentery?

Answer 14

• RUQ pain
• Fever
• Dysentery for 1-2 weeks
• Bloody diarrhea

Question 15

Name two bacteria that do not ferment lactose.

Answer 15

Shigella dysenteriae and Salmonella Enteritidis (hydrogen sulfide producing)

Question 16

What is the prophylaxis for traveller’s diarrhea?

Answer 16

Ciprofloxacin