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https://www.readbyqxmd.com/read/28919338/diagnostic-accuracy-of-xpert-mtb-rif-ultra-for-tuberculous-meningitis-in-hiv-infected-adults-a-prospective-cohort-study
#1
Nathan C Bahr, Edwin Nuwagira, Emily E Evans, Fiona V Cresswell, Philip V Bystrom, Adolf Byamukama, Sarah C Bridge, Ananta S Bangdiwala, David B Meya, Claudia M Denkinger, Conrad Muzoora, David R Boulware
BACKGROUND: WHO recommends Xpert MTB/RIF as initial diagnostic testing for tuberculous meningitis. However, diagnosis remains difficult, with Xpert sensitivity of about 50-70% and culture sensitivity of about 60%. We evaluated the diagnostic performance of the new Xpert MTB/RIF Ultra (Xpert Ultra) for tuberculous meningitis. METHODS: We prospectively obtained diagnostic cerebrospinal fluid (CSF) specimens during screening for a trial on the treatment of HIV-associated cryptococcal meningitis in Mbarara, Uganda...
September 14, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28919337/xpert-mtb-rif-ultra-a-gamechanger-for-tuberculous-meningitis
#2
Margaret Khonga, Mark Patrick Nicol
No abstract text is available yet for this article.
September 14, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28911358/performance-of-nested-rt-pcr-on-csf-for-tuberculous-meningitis-diagnosis-in-hiv-infected-patients
#3
F A S Gualberto, M G Gonçalves, L O Fukasawa, A M Ramos Dos Santos, C T Sacchi, L H Harrison, D R Boulware, J E Vidal
SETTING: Timely diagnosis of tuberculous meningitis (TBM) in patients with human immunodeficiency virus (HIV) infection remains a challenge. Despite the current scale-up of the Xpert® MTB/RIF assay, other molecular diagnostic tools are necessary, particularly in referral centres in low- and middle-income countries without Xpert testing. OBJECTIVE: To determine the diagnostic performance of nested real-time polymerase chain reaction (nRT-PCR) in HIV-infected TBM patients categorised according to standardised clinical case definitions...
October 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28774293/the-clinical-utility-of-the-urine-based-lateral-flow-lipoarabinomannan-assay-in-hiv-infected-adults-in-myanmar-an-observational-study
#4
Swe Swe Thit, Ne Myo Aung, Zaw Win Htet, Mark A Boyd, Htin Aung Saw, Nicholas M Anstey, Tint Tint Kyi, David A Cooper, Mar Mar Kyi, Josh Hanson
BACKGROUND: The use of the point-of-care lateral flow lipoarabinomannan (LF-LAM) test may expedite tuberculosis (TB) diagnosis in HIV-positive patients. However, the test's clinical utility is poorly defined outside sub-Saharan Africa. METHODS: The study enrolled consecutive HIV-positive adults at a tertiary referral hospital in Yangon, Myanmar. On enrolment, patients had a LF-LAM test performed according to the manufacturer's instructions. Clinicians managing the patients were unaware of the LF-LAM result, which was correlated with the patient's clinical course over the ensuing 6 months...
August 4, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28716809/determining-clinical-decision-thresholds-for-hiv-positive-patients-suspected-of-having-tuberculosis
#5
Tom Boyles, Isabella Locatelli, Nicolas Senn, Mark Ebell
Clinical decision thresholds may aid the evaluation of diagnostic tests but have rarely been determined for tuberculosis (TB). We presented clinicians with six web-based clinical scenarios, describing patients with HIV and possible TB at various sites and with a range of clinical stability. The probability of disease was varied randomly and clinicians asked to make treatment decisions; threshold curves and therapeutic thresholds were calculated. Test and treatment thresholds were calculated using Bayes theorem and the diagnostic accuracy of Xpert MTB/RIF...
August 2017: Evidence-based Medicine
https://www.readbyqxmd.com/read/28501491/diagnostic-usefulness-of-xpert-mtb-rif-assay-for-detection-of-tuberculous-meningitis-using-cerebrospinal-fluid
#6
Syed Beenish Rufai, Amit Singh, Jitendra Singh, Parveen Kumar, Manimuthu Mani Sankar, Sarman Singh
OBJECTIVE: Tuberculous meningitis (TBM) is the most severe form of extra-pulmonary tuberculosis (TB) due to association of diseases with high rates of mortality and morbidity. Diagnosis continues to be a clinical challenge as microbiological confirmation is rare and time consuming resulting in delayed treatment. Xpert MTB/RIF assay is a rapid and simple test, which has been endorsed by World Health Organization as an initial diagnostic test for the diagnosis of TBM. However, evidence still lacks for its performance on cerebrospinal fluid (CSF) for the diagnosis of TBM especially from India...
August 2017: Journal of Infection
https://www.readbyqxmd.com/read/28281441/miliary-tuberculosis
#7
REVIEW
Surendra K Sharma, Alladi Mohan
Miliary tuberculosis (TB) results from a massive lymphohematogenous dissemination of Mycobacterium tuberculosis bacilli and is characterized by tiny tubercles evident on gross pathology resembling millet seeds in size and appearance. The global HIV/AIDS pandemic and widespread use of immunosuppressive drugs and biologicals have altered the epidemiology of miliary TB. Considered to be predominantly a disease of infants and children in the pre-antibiotic era, miliary TB is increasingly being encountered in adults as well...
March 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/27919639/-evaluation-of-an-xpert-ev-cepheid-%C3%A2-molecular-diagnostic-technique-for-enteroviral-meningitis
#8
Natalia Alonso Pérez, Belén Sagastizabal Cardelus, Luis Manuel Prieto Tato, Sara Guillén Martín, Ana González Torralba, Isabel García Bermejo, José Tomás Ramos Amador
INTRODUCTION: Polymerase chain reaction (PCR) assays have shown to be useful and quick for the diagnosis of enterovirus in aseptic meningitis. The aim of our study was to analyse the changes in clinical practice after the introduction of a real-time polymerase chain reaction (RT-PCR) technique using the Xpert EV (Cepheid(®)) assay for the qualitative detection of enterovirus RNA in cerebrospinal fluid specimens from children with suspected viral meningitis. METHODS: A retrospective study was performed in children older than 1year, diagnosed with enterovirus meningitis in a third level hospital from November 2006 to February 2013...
December 2, 2016: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/27143630/high-rate-of-drug-resistance-among-tuberculous-meningitis-cases-in-shaanxi-province-china
#9
Ting Wang, Guo-Dong Feng, Yu Pang, Jia-Yun Liu, Yang Zhou, Yi-Ning Yang, Wen Dai, Lin Zhang, Qiao Li, Yu Gao, Ping Chen, Li-Ping Zhan, Ben J Marais, Yan-Lin Zhao, Gang Zhao
The clinical and mycobacterial features of tuberculous meningitis (TBM) cases in China are not well described; especially in western provinces with poor tuberculosis control. We prospectively enrolled patients in whom TBM was considered in Shaanxi Province, northwestern China, over a 2-year period (September 2010 to December 2012). Cerebrospinal fluid specimens were cultured for Mycobacterium tuberculosis; with phenotypic and genotypic drug susceptibility testing (DST), as well as genotyping of all positive cultures...
May 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/26966284/genexpert-mtb-rif-to-diagnose-tuberculous-meningitis-perhaps-the-first-test-but-not-the-last
#10
Nathan C Bahr, Suzaan Marais, Maxine Caws, Reinout van Crevel, Robert J Wilkinson, Jaya S Tyagi, Guy E Thwaites, David R Boulware
Tuberculous meningitis (TBM) is the most severe form of tuberculous with substantial mortality. In May 2015, 54 researchers from 10 countries met in Da Lat, Vietnam, to discuss advances in TBM. Among the attendees were researchers involved in pivotal studies on the use of Xpert MTB/Rif for TBM diagnosis. Attendees discussed the 2014 World Health Organization strong recommendation favoring the use of Xpert "in preference to conventional microscopy and culture as the initial diagnostic test for cerebrospinal fluid (CSF) if the sample volume is low or if additional specimens cannot be obtained to make a quick diagnosis...
May 1, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/26614204/xpert-%C3%A2-mtb-rif-assay-sensitivity-with-different-methods-of-csf-processing-for-the-diagnosis-of-tb-meningitis
#11
LETTER
Diego O Andrey, Hanspeter Hinrikson, Gesuele Renzi, Jonathan Hibbs, Dan Adler, Jacques Schrenzel
No abstract text is available yet for this article.
December 2015: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/26459535/improved-diagnostic-sensitivity-for-tuberculous-meningitis-with-xpert-%C3%A2-mtb-rif-of-centrifuged-csf
#12
N C Bahr, L Tugume, R Rajasingham, R Kiggundu, D A Williams, B Morawski, D Alland, D B Meya, J Rhein, D R Boulware
BACKGROUND: TB meningitis (TBM) diagnosis is difficult and novel diagnostic methods are needed. The World Health Organization recommends Xpert(®) MTB/RIF as the initial TBM diagnostic test based on two studies reporting suboptimal sensitivity (~50-60%). OBJECTIVE: To study the effect of cerebrospinal fluid (CSF) centrifugation on Xpert performance for TBM detection. DESIGN: A total of 107 predominantly human immunodeficiency virus (HIV) infected adults with presumed meningitis were screened prospectively in Kampala, Uganda...
October 2015: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/26240094/disseminated-tuberculosis-in-an-hiv-infected-child-rifampicin-resistance-detected-by-genexpert-in-a-lymph-node-aspirate-but-not-in-cerebrospinal-fluid
#13
Anna Gamell, Alex John Ntamatungiro, Manuel Battegay, Emilio Letang
A 9-year-old HIV-infected child previously treated with inadequate doses of antitubercular drugs based on weight was admitted 5 months after initial tuberculosis (TB) diagnosis with acute hemiplegia and inguinal lymphadenopathies in a rural hospital in Tanzania. He was diagnosed with TB meningitis and lymphadenitis using Xpert Mycobacterium tuberculosis/rifampicin (MTB/RIF) assay. Rifampicin resistance was detected in the lymph node aspirate but not in the cerebrospinal fluid. His TB therapy was optimised based on available medications and antiretroviral treatment was initiated 6 weeks later...
August 3, 2015: BMJ Case Reports
https://www.readbyqxmd.com/read/26063865/accuracy-of-lipoarabinomannan-and-xpert-mtb-rif-testing-in-cerebrospinal-fluid-to-diagnose-tuberculous-meningitis-in-an-autopsy-cohort-of-hiv-infected-adults
#14
COMPARATIVE STUDY
Janneke A Cox, Robert L Lukande, Sam Kalungi, Eric Van Marck, Martin Lammens, Koen Van de Vijver, Andrew Kambugu, Ann M Nelson, Robert Colebunders, Yukari C Manabe
Point-of-care tests for tuberculous meningitis (TBM) are needed. We studied the diagnostic accuracy of the lipoarabinomannan (LAM) lateral flow assay (LFA), LAM enzyme-linked immunosorbent assay (ELISA), and Xpert MTB/RIF in cerebrospinal fluid (CSF) in an autopsy cohort of Ugandan HIV-infected adults. We obtained written informed consent postmortem from the next of kin. A complete autopsy was done and CSF obtained. We performed LAM LFA (on unprepared and supernatant CSF after heating and spinning), LAM ELISA, and Xpert MTB/RIF on the CSF samples...
August 2015: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/25686133/appropriate-use-of-the-xpert%C3%A2-mtb-rif-assay-in-suspected-tuberculous-meningitis
#15
T H Boyles, G E Thwaites
We disagree with the recommendation by the World Health Organization to use Xpert(®) MTB/RIF on cerebrospinal fluid for the initial diagnosis of tuberculous meningitis (TBM). TBM is a devastating disease requiring empirical treatment even when the probability of disease is low. We suggest that a useful TBM diagnostic test needs a negative predictive value (NPV) of ⩾ 99% so that empirical treatment can be stopped safely. The NPV of Xpert is around 84%, making a negative test of limited value. While better tests are awaited, a composite score, possibly combining Xpert with clinical variables and with high NPV, should be constructed and validated prospectively...
March 2015: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/25519794/improved-diagnosis-of-childhood-tuberculous-meningitis-using-more-than-one-nucleic-acid-amplification-test
#16
R S Solomons, D H Visser, S O Friedrich, A H Diacon, K G P Hoek, B J Marais, J F Schoeman, A M van Furth
BACKGROUND: Early treatment is critical to reducing tuberculous meningitis (TBM) related morbidity and mortality. Diagnosis based on cerebrospinal fluid (CSF) culture is impractical due to slow turnaround times, while microscopy has poor sensitivity. Enhanced detection methods are essential to guide early treatment initiation, especially in vulnerable young children. METHODS: We assessed the diagnostic accuracy of the GenoType(®) MTBDRplus and Xpert(®) MTB/RIF assays on CSF collected from paediatric meningitis suspects prospectively enrolled at Tygerberg Hospital, Cape Town, South Africa...
January 2015: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/25411176/multicenter-clinical-evaluation-of-the-xpert-gbs-lb-assay-for-detection-of-group-b-streptococcus-in-prenatal-screening-specimens
#17
MULTICENTER STUDY
Blake W Buchan, Matthew L Faron, DeAnna Fuller, Thomas E Davis, Donna Mayne, Nathan A Ledeboer
Neonatal infection with Streptococcus agalactiae (group B Streptococcus [GBS]) is a leading cause of sepsis and meningitis in newborns. Recent guidelines have recommended universal screening of all pregnant women to identify those colonized with GBS and administration of peripartum prophylaxis to those identified as carriers to reduce the risk of early-onset GBS disease in neonates. Enriched culture methods are the current standard for prenatal GBS screening; however, the implementation of more sensitive molecular diagnostic tests may be able to further reduce the risk of early-onset GBS infection...
February 2015: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/25385864/epidemiology-of-meningitis-in-an-hiv-infected-ugandan-cohort
#18
Radha Rajasingham, Joshua Rhein, Kate Klammer, Abdu Musubire, Henry Nabeta, Andrew Akampurira, Eric C Mossel, Darlisha A Williams, Dave J Boxrud, Mary B Crabtree, Barry R Miller, Melissa A Rolfes, Supatida Tengsupakul, Alfred O Andama, David B Meya, David R Boulware
There is limited understanding of the epidemiology of meningitis among human immunodeficiency virus (HIV)-infected populations in sub-Saharan Africa. We conducted a prospective cohort study of HIV-infected adults with suspected meningitis in Uganda, to comprehensively evaluate the etiologies of meningitis. Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral, fungal, and mycobacterial etiologies, including neurosyphilis,16s ribosomal DNA (rDNA) polymerase chain reaction (PCR) for bacteria, Plex-ID broad viral assay, quantitative-PCR for HSV-1/2, cytomegalovirus (CMV), Epstein-Barr virus (EBV), and Toxoplasma gondii; reverse transcription-PCR (RT-PCR) for Enteroviruses and arboviruses, and Xpert MTB/RIF assay...
February 2015: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/25197396/successful-off-label-use-of-the-cepheid-xpert-gbs-in-a-late-onset-neonatal-meningitis-by-streptococcus-agalactiae
#19
Vincenzo Savini, Roberta Marrollo, Eleonora Coclite, Paola Fusilli, Carmine D'Incecco, Paolo Fazii
We report the case of a late-onset neonatal meningitis by Streptococcus agalactiae (group B Streptococcus - GBS) that was diagnosed with a latex agglutination assay (on cerebrospinal fluid, CSF), as well as by using, for the first time, Xpert GBS (Cepheid, US) on CSF. Due to empirical antibiotics given before sampling, both CSF and blood culture were negative, so the abovementioned diagnostics was crucial. Moreover, the Xpert GBS assay, performed according to an off-label, modified protocol (the system is designed for GBS-carriage intrapartum screening, based on a completely automated real time-Polymerase Chain Reaction) quickly detected the organism's genome target...
2014: International Journal of Clinical and Experimental Pathology
https://www.readbyqxmd.com/read/25056328/comparison-of-amplicor-and-genexpert-mtb-rif-tests-for-diagnosis-of-tuberculous-meningitis
#20
COMPARATIVE STUDY
Vinod B Patel, Cathy Connolly, Ravesh Singh, Laura Lenders, Brian Matinyenya, Grant Theron, Thumbi Ndung'u, Keertan Dheda
There are no data about the comparative accuracy of commercially available nucleic acid amplification tests (GeneXpert MTB/RIF and Roche Amplicor) for the diagnosis of tuberculous meningitis (TBM). A total of 148 patients with suspected TBM were evaluated, and cultures served as the reference standard. The sensitivities and specificities (95% confidence interval [CI]) for the Amplicor and Xpert MTB/RIF tests were similar: 46 (31-60) versus 50 (33-67) and 99 (93-100) and 94 (84-99), respectively.
October 2014: Journal of Clinical Microbiology
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