COMMA-SHAPED RODS

Question 1

Bacteria that causes voluminous “rice-water” diarrhea

Answer 1

Vibrio cholerae

Question 2

cause of death from V. cholerae infection:

Answer 2

Death from hydration, electrolyte losses, shock

Question 3

Best agar medium for V. cholerae:

Answer 3

Thiosulfate citrate bile salts (TCBS) agar

Question 4

V. cholerae color of colonies in TCBS agar:

Answer 4

Yellow colonies

Question 5

Vibrio specie that can infect wounds after swimming in contaminated water and can eventually lead to necrotizing fasciitis

Answer 5

V. vulnificusV

Question 6

Vibrio species that can cause food poisoning (diarrhea); found in raw oysters:

Answer 6

• V. vulnificus
• V. parahaemolyticus

Question 7

Microaerophilic, slender, curved gram (-) rod; motile with single polar flagellum (monotrichous)

Answer 7

Campylobacter

Question 8

C. jejuni and C. coli are common trigger of _______, a demyelinating disease characterized by ascending weakness

Answer 8

Guillain-Barre Syndrome

Question 9

Causes enteritis; A leading cause of acute diarrhea worldwide’ Sometimes responsible for bacteremia or endocarditis

Answer 9

• C. jejuni
• C. coli

Question 10

Incubation requirement for Campylobacter species:

Answer 10

Incubate for 48 hours in an atmosphere containing 5& O2, 10% CO2, and nitrogen (campy gas mixture)

Question 11

Bacteria which is positive for Catalase, Oxidase, Urease “Triple positive”

Answer 11

Helicobacter pylori

Question 12

Diseases caused by H. pylori:

Answer 12

• Gastritis
• Peptic ulcers (esp. duodenal)

Question 13

Diagnosis:

_____ is collected for determination of serum antibodies.
_____ may be collected for H. pylori antigen detection.

Answer 13

Blood - serum antibodies
Stool sample - H, pylori antigen detection