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In patients with Cystic Fibrosis, recurrent airway infection caused by Pseudomonas aeruginosa ultimately leads to chronic airway infection. The purpose of this study is to determine whether supplementary low-dose azithromycin to standard inhaled colistin and oral ciprofloxacin in the treatment of intermittent pseudomonas airway-infection can postpone the next episode of intermittent pseudomonas airway-infection and prevent development of chronic airway-infection.
Cystic Fibrosis is the most common genetic, inherited, deadly disease in caucasians. The disease is characterized by recurrent airway-infections caused by Pseudomonas aeruginosa, ultimately leading to chronic airway-infection, which is the main cause of the increased morbidity and mortality seen in this disease.
P. aeruginosa has the ability to change to mucoid phenotype - producing alginate and growing in biofilm, which protects the microorganisms from antibiotics and leukocytes. The change in phenotype is seen as chronic infection is established and eradication becomes impossible. Treatment with long-term, low-dose azithromycin in chronically infected CF-patients can improve the clinical condition of the patients. The exact mechanism for this is not known, but is possibly a combination of anti-inflammatory effects and the ability of azithromycin to inhibit alginate-production. Inhibition of biofilm-formation leaves the bacteria more susceptible to the actions of antibiotics and leukocytes.
Prior to establishment of chronic infection, recurrent, intermittent colonization of the airways with non-mucoid P. aeruginosa is seen. Intermittent infections can be treated using a combination of antibiotics, thereby postponing the next episode of airway-infection with P. aeruginosa.
The purpose of this study is to clarify wether supplementary azithromycin in the treatment of intermittent pseudomonas-infection in CF-patients can lead to further postponement of next pseudomonas-colonization and maybe prevent development of chronic infection. This is done in a randomised, double-blinded, placebo-controlled multicentre study.
2 treatments will be compared:
1. Inhaled colistin and oral ciprofloxacin in combination with oral azithromycin
2. Inhaled colistin and oral ciprofloxacin in combination with oral placebo.
The treatment will be given for 3 weeks, and the primary end-point is the time until next colonization with P. aeruginosa in the airways of the patients, comparing the 2 treatment-groups.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver), Primary Purpose: Treatment
Study medication, azithromycin or placebo, Azithromycin or placebo tablets
CF-centre Skejby, Skejby Sygehus, Brendstrupgaardsvej 100
Published on BioPortfolio: 2014-07-24T14:23:13-0400
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