30 Questions
Which type of bacteria are Campylobacter C.jejuni and C.coli?
Curved or S-shaped gram-negative rods
What is a common characteristic of Campylobacter species in terms of oxygen requirements?
Microaerophilic
Which of the following tests is NOT typically used to identify Campylobacter species?
TSI test
What is a selective medium used for isolating Campylobacter from stool specimens?
Brucella agar with antimicrobials
Which of the following is a characteristic shared by Campylobacter C.jejuni and C.coli?
Oxidase-positive
At what temperature can some species of Campylobacter be selectively isolated?
42 degrees Celsius
What is the most common cause of bacterial gastroenteritis worldwide?
Campylobacter spp.
Which type of medium is commonly used to transport feces and blood specimens for Campylobacter and Arcobacter?
Cary-Blair transport medium
What is the typical colony morphology of C.jejuni and other enteric campylobacters?
Moist, runny looking, and spreading
How are Campylobacter spp. described in terms of their shape?
Curved rods
Which of the following animals are primarily affected by Campylobacters in terms of causing abortion?
Cattle, sheep, and swine
What is the method used to detect both C.jejuni and C.coli Campylobacter spp.?
Enzyme immunoassays (EIA)
What type of flagella does Vibrio cholerae produce when grown in broth?
Polar, sheathed flagella
Which of the following is a characteristic of V. cholerae O139?
Gives positive results on the Voges-Proskauer test
In which media can V. cholerae produce peritrichous, unsheathed flagella?
Solid media
Which biotype of epidemic V. cholerae produces a hemolysin?
El Tor
What is the name of the heat-stable hemolysin produced by Vibrio parahaemolyticus?
Kanagawa phenomenon
Which Vibrio species requires 1% to 8% NaCl for growth?
V. parahaemolyticus
What is a key virulence factor of H.pylori?
Urease activity
How is H.pylori presumptively identified in a gastric biopsy specimen?
Rapid urease reaction testing
Which test is recommended for monitoring therapy of H.pylori infection?
Urea breath test
How is urease activity detected in the urea breath test?
Detection of 13CO2 or 14CO2 in exhaled breath
What staining technique can be used on biopsy samples to aid in the identification of H.pylori?
Warthin-Starry or Giemsa stains
Which gene is NOT an amplification target for detecting H.pylori?
toxA gene
What is the recommended medium for transporting stool specimens suspected of containing Vibrio spp?
Cary Blair medium
Which Vibrio species is associated with recent consumption of raw seafood, especially oysters?
Vibrio parahaemolyticus
What is the optimal pH range for taurocholate peptone broth used for enriching Vibrio spp. from stool specimens?
8.0-9.0
What inhibits the growth of gram-positive organisms in Thiosulfate citrate bile salt sucrose (TCBS) agar?
Bile salts
What is the characteristic color of sucrose-fermenting colonies of some Vibrio species?
Yellow
What is the recommended incubation time for stool specimens in taurocholate peptone broth before subculturing to TCBS agar?
5-8 hours
Test your knowledge on Vibrio, Aeromonas, Plesiomonas, and Helicobacter in clinical bacteriology. Explore topics like Vibrio family Vibrionaceae, aquatic environments, and specific bacterial species within these groups.
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