Detection of Mycobacterium tuberculosis in urine by Xpert MTB/RIF Ultra: A useful adjunctive diagnostic tool in HIV-associated tuberculosis
Author(s) -
Rachel Atherton,
Fiona V Cresswell,
Jayne Ellis,
Caleb P Skipper,
Kiiza Kandole Tadeo,
Gerald Mugumya,
Vincent Wadda,
David B. Meya,
David R. Boulware
Publication year - 2018
Publication title -
international journal of infectious diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 89
eISSN - 1878-3511
pISSN - 1201-9712
DOI - 10.1016/j.ijid.2018.07.007
Subject(s) - medicine , tuberculosis , urine , extrapulmonary tuberculosis , mycobacterium tuberculosis , human immunodeficiency virus (hiv) , tuberculosis diagnosis , virology , diagnostic test , intensive care medicine , immunology , pediatrics , pathology
In January 2017, the World Health Organisation recommended the Xpert ® MTB/RIF Ultra assay (Ultra) for tuberculosis (TB) diagnosis. Ultra offers improved analytical sensitivity when compared with the initial Xpert ® MTB/RIF (Xpert) assay for the detection of Mycobacterium tuberculosis. Ultra is therefore likely to be of particular benefit for detecting paucibacillary TB. We present a case from Uganda demonstrating Ultra positivity in urine from an HIV-infected patient presenting with altered mental status and urinary incontinence, and no other signs of active pulmonary or extrapulmonary TB. This represents the first published instance of a diagnosis of extrapulmonary TB made on the basis of a positive urine Ultra assay. The use of Ultra on urine may be a useful addition to the diagnostic armamentarium for disseminated TB in persons with HIV co-infection. The diagnostic accuracy of urine Ultra should be characterised further via prospective studies.
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