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The purpose of this study is to determine whether choosing antibiotics based on a biofilm antimicrobial susceptibility assay rather than a conventional planktonic antimicrobial susceptibility assay to treat CF patients with chronic P. aeruginosa infection with an acute pulmonary exacerbation is a safe intervention that will result in improved microbiological and clinical outcomes and decrease markers of pulmonary inflammation.
Cystic fibrosis (CF) is the most common fatal genetic condition in the Caucasian population and affects over 3,000 Canadians. Respiratory failure caused by chronic pulmonary infection is the primary cause of death in CF patients. The improved life expectancy of CF patients in the past several decades is due in part to the more aggressive use of antibiotics in the treatment of respiratory infections. However, there is currently no antimicrobial susceptibility assay that can predict which antibiotics will result in improved patient outcomes. Since Pseudomonas aeruginosa is known to grow as a resistant biofilm in the CF lung, antimicrobial susceptibility testing based on biofilm growth of P. aeruginosa may lead to different antibiotic choices that significantly decrease the pulmonary bacterial density of P. aeruginosa. A biofilm antimicrobial susceptibility assay thus has the ability to change the way antibiotics are chosen to treat CF patients and result in improved lung function and longer lives for all CF patients.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
Conventional antimicrobial susceptibility testing, Biofilm antimicrobial susceptibility testing
The Hospital for Sick Children
The Hospital for Sick Children
Published on BioPortfolio: 2014-07-23T21:19:23-0400
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A method where a culturing surface inoculated with microbe is exposed to small disks containing known amounts of a chemical agent resulting in a zone of inhibition (usually in millimeters) of growth of the microbe corresponding to the susceptibility of the strain to the agent.
Detection of or testing for certain ALLELES, mutations, genotypes, or karyotypes that are associated with genetic traits, heritable diseases, or with a predisposition to a disease, or that may lead to the disease in descendants. It includes prenatal genetic testing.
Testing in which the source of the specimen or the person being tested is not individually identified.
Indolesulfonic acid used as a dye in renal function testing for the detection of nitrates and chlorates, and in the testing of milk.
An indolesulfonic acid that is used as a dye in renal function testing and as a reagent for the detection of nitrates and chlorates and in the testing of milk.
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