KROK 1 2017 – Question 126 · KROK (Medicine) · Microbiology, Virology, and Immunology

Gram-positive spore-forming bacilli were extracted in anoxic environment from the patient’s wound contaminated with soil. Cultivation on a blood-glucose agar resulted in growth of the colonies surrounded with hemolysis zone. What agent was extracted from the wound?

  1. A. Clostridium botulinum
  2. B. Staphylococcus aureus
  3. C. Clostridium perfringens
  4. D. Escherichia coli
  5. E. Pseudomonas aeruginosa
Hint

Match the gram reaction, spore formation, need for anaerobic conditions and soil contamination of the wound with the organism that also lyses red cells on blood agar.

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