Miscellaneous Gram-Negative Bacilli Pt 1 Flashcards
Organism associated with Guillain-Barre syndrome
Campylobacter
All Vibrio are halophilic except:
V. cholerae & V. mimicus
Common name of Vibrio cholerae
Kommabacillus
Heat-labile cholera enterotoxin; stimulates adenylate cyclate
Choleragen
Vibrio Bengal strain; epidemic in Bangladesh (1992)
O139
3 V. cholerae O1 serotypes (based on O antigen composition)
Ogawa (A, B)
Inaba (A, C)
Hikojima (A, B, C)
2nd most common species implicated in gastroenteritis
V. parahaemolyticus
V. parahaemolyticus serotype implicated in pandemics
O3:K6
Hemolysis of human RBCs in Wagatsuma Agar, resulting in double-zone of hemolysis
Kanagawa Phenomenon
2nd most serious disease after V. cholerae O1
V. vulnificus
What is the characteristic motility of Vibrio?
Darting/shooting star
TRUE or FALSE: All Vibrio can grow in 1% NaCl.
True
What is the pH indicator of TCBS?
Bromthymol blue
Sucrose fermenters:
V. cholerae & V. alginolyticus
How can Vibrio be differentiated from Aeromonas?
Susceptibility to O/129 & (+) string test
TRUE or FALSE: All Aeromonas can grow from 4 to 42C.
True
All Aeromonas are ADH (+) except:
A. veronii
Red Leg Disease is encountered upon infection with:
Aeromonas
Infections associated with A. hydrophila:
Cellulitis and wound infections
Aeromonas resembles ____ on ____ with pink-centered colonies due to mannitol-fermentation.
Y. enterocolitica; CIN
TRUE or FALSE: Most Campylobacter are assacharolytic.
True
What is the characteristic microscopic appearance of Campylobacter?
S-shaped/seagull-shaped/comma-shaped
What is the most common cause of gastroenteritis worldwide?
C. jejuni
An autoimmune disorder which causes acute paralysis caused by damage to the PNS; antibodies to C.. jejuni bind to gangliosides
Guillain-Barre Syndrome
Media for Campylobacter comprising of brucella agar with 10% sheep RBC
Campy-BAP
How many flagella does H. pylori possess?
4-6 (lophotrichous)
The strong ____ activity of H. pylori allows in to thrive in the stomach.
Urease
In H. pylori infection, gastric acid is ____.
Alkalinized
Major cause of type B gastritis; risk factor for gastric carcinoma
H. pylori
What stains may be used to visualize H. pylori?
Warthin Starry Silver stain, gram stain
Test for H. pylori wherein the patient is given 13C- or 14C-labelled urea orally
Urea breath test
