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Evaluation of Inhaled Tobramycin in Early Eradication of Pseudomonas aeruginosa in Infants With Cystic Fibrosis.

OBJECTIVE
Early antibiotic therapy has the potential to eradicate initial Pseudomonas aeruginosa infection and postpone chronic infection. There are limited data evaluating the efficacy and safety of inhaled tobramycin in patients with cystic fibrosis (CF) who are younger than 1 year. The objective of this study was to evaluate the effectiveness of inhaled tobramycin in early eradication of P aeruginosa in infants with CF.


METHODS
This retrospective study evaluated patients with CF younger than 1 year with first time infection with P aeruginosa. The primary outcome was the frequency of P aeruginosa eradication. Secondary outcomes were sustained culture negativity at 12 and 18 months and safety assessments.


RESULTS
Of 18 patients included in the study, 9 received inhaled tobramycin and an enteral fluoroquinolone and 9 received inhaled tobramycin alone. Microbiologic clearance of respiratory cultures was observed in 83% patients at end of therapy and 78% of patients at 1 month posttherapy. Eradication of P aeruginosa was observed in 56% of patients at 6 months posttreatment with sustained culture negativity observed in 39% of patients up to 18 months.


CONCLUSIONS
Inhaled-tobramycin therapy is effective in early eradication of P aeruginosa infection and is well tolerated in infants younger than 1 year.