An oxidase-positive, gram-negative rod which produces a bluish-green pigment has been grown in culture from a swab obtained from an infected burn wound. This organism is susceptible to gentamicin, ticarcillin and tobramicin, but resistant to all the other antibiotics which of the following organisms is it likely to be ?
Correct answer: D. Pseudomonas aeruginosa
- A. Escherichia coli
- B. Klebsiella pnemoniae
- C. Proteus miribilis
- D. Pseudomonas aeruginosa
Explanation
Pseudomonas aeruginosa is an oxidase-positive Gram-negative rod that produces the characteristic blue-green pigment pyocyanin and commonly infects burn wounds. Its typical susceptibility pattern also supports this identification.
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