Part 1 Another person comes into the Emergency Department with similar signs and

Question

Part 1 Another person comes into the Emergency Department with similar signs and symptoms to Tim. Because of their recent experience with Tim, the attending physician immediately tests the new patient's sputum by streaking it on CGB agar. How would you interpret the results shown? (NCLEX style) View Available Hint(s) Since this is agar, the result shows that the new patient is infected with a bacterium, not a fungus. The new patient is infected with Cryptococcus, but it is impossible to tell which species The new patient is infected with C. neoformans. The new patient is infected with C. gattii

Explanation / Answer

4. The new patient is infected with C. getti.

There can be three situations on CGB agar, that is, no colour change- means no cryptococcus. Slight colour change from yellow to light green or medium yellow- low or minimum growth of Cryptococcus neofomans. Colour change to medium or cobalt blue - growth of C.getti.

The blue colour change is due to alkaline shift produced when creatinine is degraded to ammonia, Which is more in C.getti.

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