3. Gastrointestinal Infections Flashcards Preview

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Flashcards in 3. Gastrointestinal Infections Deck (29):
1

pH indicator in TSI

Phenol red

2

2 viruses that cause diarrhea

- Rotavirus
- Norwalk virus

3

Humans and large primates are the only reservoir

Shigella

4

Pathogen detected by CIN agar

Yersinia

5

Infections due to this organism are NOT treated empirically

Shigella

6

What is Reiter's syndrome

Reactive arthritis caused by Campy as well as Chlamydia

7

Pathogen detected by TCBS

Vibrio

8

AKA Shiga-toxin producing E. coli

EHEC (STEC)

9

E. coli acronym that causes HUS

EHEC

10

Characteristic that separates Plesiomonas from the rest of the Enterobacteriaceae family

Oxidase POS

11

If a bloody stool is received, an aliquot is always sent for investigation for other pathogenic toxin-producing E. coli where?

- BCCDC
- On site if molecular techniques available

12

What is PBS broth used for

Yersinia cold enrichment

13

AST usually tested but not reported for this organism

Salmonella spp.

14

If Salmonella only has agglutination with the Vi antiserum, what should be done?

Boil for 10 mins, re-test the polyvalent O antiserum

15

Green colony on TCBS = which organism?

Vibrio parahemolyticus

16

Most common serotype of Shigella in North America

Sh. sonnei (Group D)

17

Liquid media suitable for H. pylori?

Urea broth

18

Stool transport media that can be stored/transported at RT

Cary-Blair transport medium

19

Campylobacter catalase result?

Catalase POS

20

PVA preservative cannot be used in the investigation of this organism

Cryptosporidium

21

Yellow colony on TCBS = which organism?

Vibrio cholerae

22

E. coli acronym that is not invasive and produces no toxin

EPEC

23

When would a Salmonella infection require treatment?

If enteric fever or other invasive infection (NOT uncomplicated gastroenteritis; non-typhoid)

24

3 parasites that cause diarrhea

- Giardia lambia
- Cryptosporidium spp.
- Entamoeba histolytica

25

E. coli acronym that causes traveler's diarrhea

ETEC

26

Purpose of buffered glycerol

Transport best for Shigella

27

Rarest and most virulent Shigella

Sh. dysenteriae (Group A)

28

What is SAF preservative in Ova and Parasite collection?

Sodium acetate, acetic acid, formalin

29

Pathogen detected by XLD agar

Shigella spp, Salmonella spp.