NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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What is the early disease-causing bacteria in Cystic Fibrosis (CF)?

P. aeruginosa
S. aureus and H. flu
Aztreonam
Tobramycin

The correct answer is: S. aureus and H. flu

In Cystic Fibrosis (CF), the early disease-causing bacteria are typically Staphylococcus aureus and Haemophilus influenzae. These bacteria are commonly found in the airways of CF patients and are often the initial pathogens responsible for causing respiratory infections in individuals with CF. Pseudomonas aeruginosa usually colonizes the airways at a later stage of the disease progression. Aztreonam and tobramycin are antibiotic options used to treat infections in CF patients, but they are not the early disease-causing bacteria in CF.