KROK 1 2018 – Question 5 · KROK (Medicine) · Microbiology, Virology, and Immunology

From the feces of a patient with acute gastroenteritis a pure culture of microorganisms was obtained. The microorganisms are small mobile slightly curved gram-negative bacilli that within 6 hours grow into a light blue film on the 1% alkaline peptone water. Such properties are characteristic of the following microorganism:

  1. A. Clostridium
  2. B. Spirilla
  3. C. Spirochaete
  4. D. Vibrio
  5. E. Bacillus
Hint

Combine the shape, motility and Gram reaction with growth in a strongly alkaline enrichment medium to decide which bacterial group fits.

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