Repeated USMLE Questions Step 2 CK- 443

A 12-year-old boy with a history of cystic fibrosis develops dyspnea, cough and fever. His temperature is 103.1 F, his pulse is 120/min and his oxygen saturation is 85%. Lung examination reveals bilateral rhonchi.

What is the appropriate antibiotic treatment?


B-Ampicillin and gentamicin


D-Ceftazidime and gentamicin



This is a case of acute exacerbation of cystic fibrosis caused by pseudomonas aeruginosa infection which is the most common infection is cases of cystic fibrosis. Treatment with double coverage antibiotic therapy is appropriate in this case. Ceftazidime and gentamicin regime is the most effective antibiotic therapy for treatment of this infection.

The correct answer is D

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