KROK 1 2009 – Question 176 · KROK (Medicine) · Microbiology, Virology, and Immunology
A 65-year-old man has purulent abscess on his neck. Analyses revealed a culture of gram-positive cocci with plasmocoagulase activity. This culture relates most likely to:
- A. Streptococcus pyogenes
- B. Staphylococcus aureus
- C. Staphylococcus saprophyticus
- D. Staphylococcus epidermidis
- E. -
Hint
Use the enzyme that clots plasma, together with the pyogenic role of these cocci in skin abscesses, to separate the most virulent member of the genus from its relatives and from chain-forming cocci.
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