Stool processing methods for Xpert Ultra testing in childhood tuberculosis: a prospective, multicountry accuracy study
Centrifuge-free processing methods support stool Xpert Ultra testing for childhood tuberculosis, but data on their accuracy, acceptability, and usability are limited.We conducted a prospective evaluation of stool Xpert Ultra in India, South Africa, and Uganda with 3 methods: the Stool Processing Kit...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
3 June 2025
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| In: |
Clinical infectious diseases
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| ISSN: | 1537-6591 |
| DOI: | 10.1093/cid/ciaf289 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1093/cid/ciaf289 Verlag, kostenfrei, Volltext: https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaf289/8156021?login=true 
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| Verfasserangaben: | Devan Jaganath, Pamela Nabeta, Mark P Nicol, Robert Castro, Peter Wambi, Heather J Zar, Lesley Workman, Rakesh Lodha, Urvashi B Singh, Ashish Bavdekar, Sonali Sanghavi, André Trollip, Aurélien Mace, Maryline Bonnet, Manon Lounnas, Petra de Haas, Edine Tiemersma, David Alland, Padmapriya Banada, Adithya Cattamanchi, Morten Ruhwald, Eric Wobudeya, Claudia M Denkinger, for the Stool H2H Study Team |
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| 245 | 1 | 0 | |a Stool processing methods for Xpert Ultra testing in childhood tuberculosis |b a prospective, multicountry accuracy study |c Devan Jaganath, Pamela Nabeta, Mark P Nicol, Robert Castro, Peter Wambi, Heather J Zar, Lesley Workman, Rakesh Lodha, Urvashi B Singh, Ashish Bavdekar, Sonali Sanghavi, André Trollip, Aurélien Mace, Maryline Bonnet, Manon Lounnas, Petra de Haas, Edine Tiemersma, David Alland, Padmapriya Banada, Adithya Cattamanchi, Morten Ruhwald, Eric Wobudeya, Claudia M Denkinger, for the Stool H2H Study Team |
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| 520 | |a Centrifuge-free processing methods support stool Xpert Ultra testing for childhood tuberculosis, but data on their accuracy, acceptability, and usability are limited.We conducted a prospective evaluation of stool Xpert Ultra in India, South Africa, and Uganda with 3 methods: the Stool Processing Kit (SPK), the Simple One-Step method (SOS), and the Optimized Sucrose Flotation method (OSF). Children <15 years old with presumptive tuberculosis underwent sputum testing with Xpert Ultra and culture. We compared the accuracy of each method against a microbiological reference standard (tuberculosis if Xpert Ultra or culture positive) and a composite reference standard (tuberculosis if confirmed or unconfirmed tuberculosis). We surveyed laboratory staff to assess the acceptability and usability of the methods.We included 607 children, with a median age of 3.5 years (interquartile range, 1.3-7 years); 15.5% were human immunodeficiency virus positive. Against the microbiological reference standard, the sensitivities of SPK, SOS, and OSF were 36.9% (95% confidence interval, 28.6%-45.8%), 38.6% (17.2%-51.0%), and 31.3% (20.2%-44.1%), respectively, and the specificities, 98.2% (96.4%-99.3%), 97.3% (93.7%-99.1%), and 97.1% (93.3%-99%). The methods were acceptable and usable, but SOS was reported as most feasible to implement in a peripheral facility. Across methods, sensitivities increased among children who were culture positive (range, 55.0%-77.3%) and were low (13%-16.7%) against the composite reference standard. Adding stool Xpert Ultra increased sensitivity from 0% (OSF) to 11.8% (SPK/SOS), compared with sputum alone.Stool processing methods for Xpert Ultra were acceptable and usable and performed similarly, with highest sensitivity among children with culture-positive tuberculosis. | ||
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