Chapter 3: Gastroenteritis

Question 1

What is disease classification of Gastroenteritis?

Accepted Answer

(intestional infection)

Question 2

What causes Gastroenteritis?

Accepted Answer

*Escherichia coli (E. coli)

Question 3

How many pathogenic variants of Escherichia coli (E.coli) exists?

Accepted Answer

*6 pathogentic variants

Question 4

Name of shiga toxin producing E. coli strain?

Accepted Answer

E. coli 0157: H7 (STEC)

Question 5

Characteristics of Escherichia coli:

Accepted Answer

*gram negative bacillus *facultative anaerobe (doesn't need oxygen) *motile *non-spore forming

Question 6

Epidemiology of Escherichia coli?

Accepted Answer

*reservoir: animals and their environment *portal of entry: digestive tract *Mode of Transmission: fecal oral route

Question 7

Incubation period of Escherichia coli?

Accepted Answer

*1-3 days

Question 8

Pathogenesis of Escherichia coli?

Accepted Answer

*process varies slighly depending on the ecoli strain *includes colonization of small or large intestine by attatching/invading epithelial cells

Question 9

Pathogenesis of O157: H7 E. coli?

Accepted Answer

*attaches to the linning of colon and forms diarrhea inducing lesions *can secrete shiga toxins

Question 10

What do shiga toxins do? What releases them?

Accepted Answer

*damage blood vessles resulting in intestional hemmorrhage *released by 0157:H7 Escherichia coli

Question 11

Signs and Symptoms of E.coli?

Accepted Answer

*diarrhea (often blood without pus) *abdominal craps *fever *nausea *vomiting

Question 12

When do symp start to improve for those with Gastroenteritis?

Accepted Answer

3-10 dys

Question 13

Complications of Gastroenteritis?

Accepted Answer

*severe dehydration *Hemolytic-uremic syndrome (HUS)

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