KROK 1 2021 – Question 89 · KROK (Medicine) · Microbiology, Virology, and Immunology
Bacteriology testing is one of the methods for laboratory diagnostics of diphtheria. To grow the colonies of C. diphtheriae, it is necessary to know the proper conditions for causative agent cultivation. What nutrient media are optimal for Corynebacterium diphtheriae cultivation?
- A. Blood agar, tellurite blood agar
- B. Endo medium, Ploskirev medium
- C. Salt egg yolk agar
- D. Serum agar, ascitic agar
- E. Sugar meat peptone broth, sugar meat peptone agar
Hint
Think of the selective and differential medium on which the diphtheria bacillus reduces a toxic salt and forms characteristic grey-black colonies, built on an enriched base.
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