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Prospective evaluation of RT-PCR on sputum versus culture, urinary antigens and serology for Legionnaire's disease diagnosis. | LitMetric

Prospective evaluation of RT-PCR on sputum versus culture, urinary antigens and serology for Legionnaire's disease diagnosis.

J Infect

GIMAP EA 3064 (Groupe Immunité des Muqueuses et Agents Pathogènes), COMUE of Lyon, 42023 Saint-Etienne, France; Infectious Diseases Department, University Hospital of Saint-Etienne, 42055 Saint-Etienne Cedex 02, France; Laboratory of Infectious Agents and Hygiene, University Hospital of Saint-Etienne, 42055 Saint-Etienne Cedex 02, France. Electronic address:

Published: August 2016

AI Article Synopsis

Article Abstract

Objectives: Legionnaires' disease (LD) is a severe disease associated with community and hospital-acquired pneumonia, frequently under diagnosed. The main aim of our study was to determine the value of PCR for the diagnosis of LD in routine clinical practice.

Methods: In a prospective study, from March 2007 to April 2010, the value of PCR on non-invasive respiratory specimens (NIRS) was compared to those of the other available tools for LD diagnosis in patients hospitalized for pneumonia.

Results: Among 254 consecutive cases of pneumonia included, 24 cases were LD (19 confirmed and 5 probable) representing the first documented microbiological etiology. Molecular diagnosis of LD was performed on NIRS by using 16S rRNA PCR, and secondarily mip PCR, with no discrepant results between the 2 methods: it was found positive in 14 cases and led to identify 2 supplementary probable cases of LD. Based on clinical and at least 2 positive LD tests, PCR yielded a better diagnostic value than antigen urinary test (12 vs 10 cases).

Conclusion: These results revealed that molecular diagnosis of LD on NIRS is reliable and may contribute to better identify cases of LD.

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Source
http://dx.doi.org/10.1016/j.jinf.2016.04.039DOI Listing

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