KROK 1 2015 – Question 27 · KROK (Medicine) · Microbiology, Virology, and Immunology
Pure culture of microorganisms was obtained from pharynx of a child with suspected diphtheria. Morphologic, tinctorial, cultural, and biochemical properties of the microorganisms were studied and revealed to be characteristic of diphtheria agents. What investigation should be additionally performed to make a conclusion, that these microorganisms are pathogenic diphtheria bacilli?
- A. Determine urease activity
- B. Determine proteolytic properties
- C. Determine toxigenic properties
- D. Determine cystinase activity
- E. Determine amylolytic activity
Hint
Identifying the species does not yet show virulence; ask which property of the isolate is responsible for the clinical disease.
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