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Published in: European Journal of Clinical Microbiology & Infectious Diseases 6/2018

Open Access 01-06-2018 | Original Article

Diagnostic accuracy of the InBiOS AMD rapid diagnostic test for the detection of Burkholderia pseudomallei antigen in grown blood culture broth

Authors: Marjan Peeters, Panha Chung, Hua Lin, Kristien Mortelmans, Chhundy Phe, Chentha San, Laura Maria Francisca Kuijpers, Syna Teav, Thong Phe, Jan Jacobs

Published in: European Journal of Clinical Microbiology & Infectious Diseases | Issue 6/2018

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Abstract

To assess the diagnostic and operational performance of the InBiOS AMD rapid diagnostic test (RDT) (Seattle, USA) for the detection of B. pseudomallei in grown blood culture broth. The InBiOS RDT is a lateral flow immunoassay in a strip format detecting B. pseudomallei capsular polysaccharide in culture fluids, marketed for research only. Broth of blood culture bottles (BacT/Alert, bioMérieux, Marcy L’Etoile, France) sampled in adult patients at the Sihanouk Hospital Center of HOPE, Phnom Penh, Cambodia, during 2010–2017 and stored at − 80 °C was tested. They included samples grown with B. pseudomallei (n = 114), samples with no growth (n = 12), and samples with growth of other pathogens (n = 139, among which Burkholderia cepacia (n = 5)). Diagnostic sensitivity and specificity were 96.5% [95% confidence interval (CI): 91.3–98.6%] and 100% [CI: 97.5–100%] respectively. Background clearance and line intensities were good and very good. The RDT’s test strip, not housed in a cassette, caused difficulties in manipulation and biosafety. The centrifugation step prescribed by the procedure challenged biosafety, but processing of 19 B. pseudomallei samples without centrifugation showed similar results for line intensity and background clearance, compared to centrifugation. The InBiOS RDT showed excellent accuracy for detection of B. pseudomallei in grown blood culture broth. Provided operational adaptations such as cassette housing, it has the potential to reduce time to diagnosis of melioidosis.
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Metadata
Title
Diagnostic accuracy of the InBiOS AMD rapid diagnostic test for the detection of Burkholderia pseudomallei antigen in grown blood culture broth
Authors
Marjan Peeters
Panha Chung
Hua Lin
Kristien Mortelmans
Chhundy Phe
Chentha San
Laura Maria Francisca Kuijpers
Syna Teav
Thong Phe
Jan Jacobs
Publication date
01-06-2018
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Clinical Microbiology & Infectious Diseases / Issue 6/2018
Print ISSN: 0934-9723
Electronic ISSN: 1435-4373
DOI
https://doi.org/10.1007/s10096-018-3237-3

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