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Evaluation of the Binax NOW Streptococcus pneumoniae urinary antigen assay in intensive care patients hospitalized for pneumonia

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Abstract

Objective

To evaluate the diagnostic performance of Binax Now S. pneumoniae urinary antigen rapid immunochromatographic membrane test (ICT) for patients with suspicion of community-acquired pneumonia hospitalized in intensive care and to assess the impact of prior antibiotics on its diagnostic performance.

Design and setting

Retrospective study in a medicosurgical ICU in a 700-bed general hospital.

Patients

Charts of patients with ICT performed (result blinded) were reviewed between May 2002 and July 2004. ICT has been performed in 140 of the 1,006 patients hospitalized in the unit; two-thirds had received antibiotics prior to admission.

Measurements and results

Diagnosis of pneumonia was made according to usual criteria. All patients had at least one microbiological test. Pneumonia diagnosis confirmed in 108 patients including 32 pneumococcal. ICT was positive in 23 of 32 patients with pneumococcal pneumonia, in 11 of 108 without, and in none of the 32 patients without pneumonia, resulting in sensitivity, specificity, and positive and negative predictive values of, respectively: 72%, 90%, 68% and 92%. Positive likelihood ratios were comparable among patients with or without prior antibiotics (respectively 6 and 12 for 7 in the overall population).

Conclusions

This first clinical evaluation of ICT in intensive care patients hospitalized for suspicion of community-acquired pneumonia, demonstrated performance in accordance with published data even in the case of prior antibiotics. Its clinical interest and impact on antibiotics policy remain to be refined.

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Acknowledgements

We thank Isabelle Boutron for her assistance with statistics.

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Authors and Affiliations

  1. Service de Réanimation Chirurgicale, CHU Bichat-Claude Bernard, 46 rue Henri Huchard, 75877, Paris Cedex 18, France

    Sigismond Lasocki

  2. Service de Biologie, CH Victor Dupouy, 69 rue du Lt Colonel Prudhon, 95100, Argenteuil, France

    Agnès Scanvic & Françoise Le Turdu

  3. Service de Réanimation polyvalente, CH Victor Dupouy, 69 rue du Lt Colonel Prudhon, 95100, Argenteuil, France

    Aymeric Restoux, Hervé Mentec, Gérard Bleichner & Jean-Pierre Sollet

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  1. Sigismond Lasocki
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  2. Agnès Scanvic
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  3. Françoise Le Turdu
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  4. Aymeric Restoux
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Correspondence to Sigismond Lasocki.

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Lasocki, S., Scanvic, A., Le Turdu, F. et al. Evaluation of the Binax NOW Streptococcus pneumoniae urinary antigen assay in intensive care patients hospitalized for pneumonia. Intensive Care Med 32, 1766–1772 (2006). https://doi.org/10.1007/s00134-006-0329-9

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  • DOI: https://doi.org/10.1007/s00134-006-0329-9

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