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Stenotrophomonas maltophilia in Cystic Fibrosis: Serologic Response and Effect on Lung Disease.
MedLine Citation:
PMID:  20889901     Owner:  NLM     Status:  In-Data-Review    
Rationale: Stenotrophomonas maltophilia is one of the more common multidrug-resistant organisms isolated from the respiratory tract of patients with cystic fibrosis (CF), but the effect of chronic S. maltophilia infection on CF lung disease is unknown. Objectives: To determine the impact of chronic S. maltophilia infection on lung disease in CF. Methods: We developed a serologic assay specific for S. maltophilia and in a cross-sectional study, measured serum antibodies to S. maltophilia in patients with CF to determine if a definition of chronic S. maltophilia isolation based on culture results corresponded to an immunologic response (serologic study). We then used this validated definition to examine the effect of chronic S. maltophilia on the severity of lung disease in a retrospective cohort study using the Toronto CF Database from 1997-2008 (cohort study). Measurements and Main Results: Serum antibody levels to S. maltophilia were measured in 179 patients with CF. Patients with chronic S. maltophilia had significantly higher mean antibody levels to S. maltophilia flagellin (P < 0.0001) and whole cell (P = 0.0004) compared with patients with intermittent or no S. maltophilia. The cohort study included 692 patients with an average follow-up of 8.3 years. In an adjusted log linear model, patients with chronic S. maltophilia infection had a significantly increased risk of pulmonary exacerbation requiring hospitalization and antibiotics compared with patients who had never had S. maltophilia (relative risk = 1.63; P = 0.0002). Conclusions: Chronic S. maltophilia infection in patients with CF is associated with a specific immune response to this organism and is an independent risk factor for pulmonary exacerbations.
Valerie Waters; Yvonne Yau; Sudha Prasad; Annie Lu; Eshetu Atenafu; Ian Crandall; Stephanie Tom; Elizabeth Tullis; Felix Ratjen
Publication Detail:
Type:  Journal Article     Date:  2010-10-01
Journal Detail:
Title:  American journal of respiratory and critical care medicine     Volume:  183     ISSN:  1535-4970     ISO Abbreviation:  Am. J. Respir. Crit. Care Med.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-04-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9421642     Medline TA:  Am J Respir Crit Care Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  635-40     Citation Subset:  AIM; IM    
Division of Infectious Diseases, Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8 Canada.
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