Prophylactic antibiotics for cystic fibrosis.

Staphylococcus aureus causes pulmonary infection in young children with cystic fibrosis (CF). Prophylactic antibiotics are widely prescribed in the hope of preventing infection with Staphylococcus aureus and lung damage. Antibiotics also have adverse effects and long-term use might lead to chronic infection with organisms like Pseudomonas aeruginosa.