Miscellaneous Gram-Negative Bacilli Pt 1

Question 1

Organism associated with Guillain-Barre syndrome

Answer 1

Campylobacter

Question 2

All Vibrio are halophilic except:

Answer 2

V. cholerae & V. mimicus

Question 3

Common name of Vibrio cholerae

Answer 3

Kommabacillus

Question 4

Heat-labile cholera enterotoxin; stimulates adenylate cyclate

Answer 4

Choleragen

Question 5

Vibrio Bengal strain; epidemic in Bangladesh (1992)

Answer 5

O139

Question 6

3 V. cholerae O1 serotypes (based on O antigen composition)

Answer 6

Ogawa (A, B)
Inaba (A, C)
Hikojima (A, B, C)

Question 7

2nd most common species implicated in gastroenteritis

Answer 7

V. parahaemolyticus

Question 8

V. parahaemolyticus serotype implicated in pandemics

Answer 8

O3:K6

Question 9

Hemolysis of human RBCs in Wagatsuma Agar, resulting in double-zone of hemolysis

Answer 9

Kanagawa Phenomenon

Question 10

2nd most serious disease after V. cholerae O1

Answer 10

V. vulnificus

Question 11

What is the characteristic motility of Vibrio?

Answer 11

Darting/shooting star

Question 12

TRUE or FALSE: All Vibrio can grow in 1% NaCl.

Answer 12

True

Question 13

What is the pH indicator of TCBS?

Answer 13

Bromthymol blue

Question 14

Sucrose fermenters:

Answer 14

V. cholerae & V. alginolyticus

Question 15

How can Vibrio be differentiated from Aeromonas?

Answer 15

Susceptibility to O/129 & (+) string test

Question 16

TRUE or FALSE: All Aeromonas can grow from 4 to 42C.

Answer 16

True

Question 17

All Aeromonas are ADH (+) except:

Answer 17

A. veronii

Question 18

Red Leg Disease is encountered upon infection with:

Answer 18

Aeromonas

Question 19

Infections associated with A. hydrophila:

Answer 19

Cellulitis and wound infections

Question 20

Aeromonas resembles ____ on ____ with pink-centered colonies due to mannitol-fermentation.

Answer 20

Y. enterocolitica; CIN

Question 21

TRUE or FALSE: Most Campylobacter are assacharolytic.

Answer 21

True

Question 22

What is the characteristic microscopic appearance of Campylobacter?

Answer 22

S-shaped/seagull-shaped/comma-shaped

Question 23

What is the most common cause of gastroenteritis worldwide?

Answer 23

C. jejuni

Question 24

An autoimmune disorder which causes acute paralysis caused by damage to the PNS; antibodies to C.. jejuni bind to gangliosides

Answer 24

Guillain-Barre Syndrome

Question 25

Media for Campylobacter comprising of brucella agar with 10% sheep RBC

Answer 25

Campy-BAP

Question 26

How many flagella does H. pylori possess?

Answer 26

4-6 (lophotrichous)

Question 27

The strong ____ activity of H. pylori allows in to thrive in the stomach.

Answer 27

Urease

Question 28

In H. pylori infection, gastric acid is ____.

Answer 28

Alkalinized

Question 29

Major cause of type B gastritis; risk factor for gastric carcinoma

Answer 29

H. pylori

Question 30

What stains may be used to visualize H. pylori?

Answer 30

Warthin Starry Silver stain, gram stain

Question 31

Test for H. pylori wherein the patient is given 13C- or 14C-labelled urea orally

Answer 31

Urea breath test