Xpert-Ultra Assay in Stool and Urine Samples to Improve Tuberculosis Diagnosis in Children: The Médecins Sans Frontières Experience in Guinea-Bissau and South Sudan.

When examining HIV, SAM, and <5-year-old subpopulations, we found a nonsignificant trend suggesting greater sensitivity of Xpert-Ultra with stool samples in children with HIV (87.5%) or SAM (71.9%), without a substantial drop in specificity, similar to the findings described by Kabir et al [ 31 ], who found a sensitivity of 71% children with SAM; unpublished data available in a Cochrane review report a sensitivity of 50% in children living with HIV [ 28 ].

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