KROK 1 2007 – Question 60 · KROK (Medicine) · Microbiology, Virology, and Immunology

Bacteriological examination of a patient with food poisoning required inoculation of a pure culture of bacteria with the following properties: gram-negative movable bacillus that grows in the Endo’s medium in form of colourless colonies. A representative of which species caused this disease?

  1. A. Yersinia
  2. B. Shigella
  3. C. Citrobacter
  4. D. Escherichia
  5. E. Salmonella
Hint

Combine three clues: a motile Gram-negative rod, no lactose fermentation on Endo agar, and food-borne gastroenteritis; decide which genus fits all of them.

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