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Khambati N, Song R, Smith JP, Bijker EM, McCarthy K, Click ES, Mchembere W, Okumu A, Musau S, Okeyo E, Perez-Velez CM, Cain K. Feasibility and utility of a combined nasogastric-tube-and-string-test device for bacteriologic confirmation of pulmonary tuberculosis in young children. Diagn Microbiol Infect Dis 2024; 109:116302. [PMID: 38657352 PMCID: PMC11128341 DOI: 10.1016/j.diagmicrobio.2024.116302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/03/2024] [Accepted: 04/10/2024] [Indexed: 04/26/2024]
Abstract
For microbiological confirmation of pediatric pulmonary tuberculosis (PTB), gastric aspirates (GA) are often operationally unfeasible without hospitalization, and the encapsulated orogastric string test is not easily swallowed in young children. The Combined-NasoGastric-Tube-and-String-Test (CNGTST) enables dual collection of GA and string specimens. In a prospective cohort study in Kenya, we examined its feasibility in children under five with presumptive PTB and compared the bacteriological yield of string to GA. Paired GA and string samples were successfully collected in 95.6 % (281/294) of children. Mycobacterium tuberculosis was isolated from 7.0 % (38/541) of GA and 4.3 % (23/541) of string samples, diagnosing 8.2 % (23/281) of children using GA and 5.3 % (15/281) using string. The CNGTST was feasible in nearly all children. Yield from string was two-thirds that of GA despite a half-hour median dwelling time. In settings where the feasibility of hospitalisation for GA is uncertain, the string component can be used to confirm PTB.
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Affiliation(s)
- Nisreen Khambati
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK.
| | - Rinn Song
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK; Division of Infectious Diseases, Boston Children's Hospital, Boston, MA USA; Department of Pediatrics, Harvard Medical School, Boston, MA USS
| | - Jonathan P Smith
- Division of Global HIV and Tuberculosis, Centers for Disease Control and Prevention, Atlanta, Georgia, United States; Department of Health Policy and Management, Yale School of Public Health, New Haven, Connecticut, United States
| | - Else Margreet Bijker
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK; Department of Pediatrics, Maastricht University Medical Center, MosaKids Children's Hospital, Maastricht, the Netherlands
| | - Kimberly McCarthy
- Division of Global HIV and Tuberculosis, Centers for Disease Control and Prevention, Atlanta, Georgia, United States
| | - Eleanor S Click
- Division of Global HIV and Tuberculosis, Centers for Disease Control and Prevention, Atlanta, Georgia, United States
| | - Walter Mchembere
- Kenya Medical Research Institute - Center for Global Health Research, Kisumu, Kenya
| | - Albert Okumu
- Kenya Medical Research Institute - Center for Global Health Research, Kisumu, Kenya
| | - Susan Musau
- Kenya Medical Research Institute - Center for Global Health Research, Kisumu, Kenya
| | - Elisha Okeyo
- Kenya Medical Research Institute - Center for Global Health Research, Kisumu, Kenya
| | | | - Kevin Cain
- Division of Global HIV and Tuberculosis, Centers for Disease Control and Prevention, Atlanta, Georgia, United States
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Foster J, Marais BJ, Mendez D, McBryde ES. Critical Review of Tuberculosis Diagnosis in Children from Papua New Guinea Presenting to Health Facilities in the Torres Strait Islands, Australia. Microorganisms 2023; 11:2947. [PMID: 38138091 PMCID: PMC10745913 DOI: 10.3390/microorganisms11122947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/20/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
Paediatric tuberculosis can be challenging to diagnose, and various approaches are used in different settings. A retrospective review was conducted on Papua New Guinea (PNG) children with presumptive TB who presented for health care in the Torres Strait Islands, Australia, between 2016 and 2019. We compared diagnostic algorithms including the modified Keith Edwards TB Score, The Union Desk Guide, and the new World Health Organization (WHO) algorithm, with diagnostic practices used in the remote Torres Strait Islands. Of the 66 children with presumptive TB, 7 had bacteriologically confirmed TB. The majority (52%) were under 5 years (median age 61 months), and 45% were malnourished. There was moderate agreement across the diagnostic methods (K = 0.34; 95% CI 0.23-0.46), with the highest concordance observed between The Union Desk Guide and the WHO's algorithm (K = 0.61). Local TB physicians might have over-diagnosed presumed lymph node TB while under-diagnosing TB overall. Enhancing the precision and promptness of paediatric TB diagnosis using practical tools is pivotal to decrease TB-related child mortality, notably in isolated regions like the Torres Strait and the Western Province of PNG.
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Affiliation(s)
- J’Belle Foster
- College of Medicine and Dentistry, James Cook University, Townsville, QLD 4811, Australia;
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia;
- Torres and Cape Tuberculosis Control Unit, Thursday Island, QLD 4875, Australia
| | - Ben J. Marais
- WHO Collaborating Centre in Tuberculosis, Sydney Infectious Diseases Institute (Sydney ID), The University of Sydney, Westmead, NSW 2145, Australia;
| | - Diana Mendez
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia;
| | - Emma S. McBryde
- College of Medicine and Dentistry, James Cook University, Townsville, QLD 4811, Australia;
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia;
- Torres and Cape Tuberculosis Control Unit, Thursday Island, QLD 4875, Australia
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3
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Khambati N, Song R, MacLean ELH, Kohli M, Olbrich L, Bijker EM. The diagnostic yield of nasopharyngeal aspirate for pediatric pulmonary tuberculosis: a systematic review and meta-analysis. BMC GLOBAL AND PUBLIC HEALTH 2023; 1:18. [PMID: 38628460 PMCID: PMC11019899 DOI: 10.1186/s44263-023-00018-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 08/22/2023] [Indexed: 04/19/2024]
Abstract
Background Tuberculosis (TB) is a leading cause of death in children, but many cases are never diagnosed. Microbiological diagnosis of pulmonary TB is challenging in young children who cannot spontaneously expectorate sputum. Nasopharyngeal aspirates (NPA) may be more easily collected than gastric aspirate and induced sputum and can be obtained on demand, unlike stool. However, further information on its diagnostic yield is needed. Methods We systematically reviewed and meta-analyzed the diagnostic yield of one NPA for testing by either culture or nucleic acid amplification testing (NAAT) to detect Mycobacterium tuberculosis from children. We searched three bibliographic databases and two trial registers up to 24th November 2022. Studies that reported the proportion of children diagnosed by NPA compared to a microbiological reference standard (MRS) were eligible. Culture and/or WHO-endorsed NAAT on at least one respiratory specimen served as the MRS. We also estimated the incremental yield of two NPA samples compared to one and summarized operational aspects of NPA collection and processing. Univariate random-effect meta-analyses were performed to calculate pooled diagnostic yield estimates. Results From 1483 citations, 54 were selected for full-text review, and nine were included. Based on six studies including 256 children with microbiologically confirmed TB, the diagnostic yield of NAAT on one NPA ranged from 31 to 60% (summary estimate 44%, 95% CI 36-51%). From seven studies including 242 children with confirmed TB, the diagnostic yield of culture was 17-88% (summary estimate 58%, 95% CI 42-73%). Testing a second NPA increased the yield by 8-19% for NAAT and 4-35% for culture. NPA collection procedures varied between studies, although most children had NPA successfully obtained (96-100%), with a low rate of indeterminate results (< 5%). Data on NPA acceptability and specifically for children under 5 years were limited. Conclusions NPA is a suitable and feasible specimen for diagnosing pediatric TB. The high rates of successful collection across different levels of healthcare improve access to microbiological testing, supporting its inclusion in diagnostic algorithms for TB, especially if sampling is repeated. Future research into the acceptability of NPA and how to standardize collection to optimize diagnostic yield is needed.
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Affiliation(s)
- Nisreen Khambati
- Oxford Vaccine Group, Department of Pediatrics, University of Oxford, Oxford, UK
| | - Rinn Song
- Oxford Vaccine Group, Department of Pediatrics, University of Oxford, Oxford, UK
| | - Emily Lai-Ho MacLean
- Faculty of Medicine and Health, Central Clinical School, The University of Sydney, Sydney, Australia
- Centre of Research Excellence in Tuberculosis, Sydney, NSW, Australia
| | - Mikashmi Kohli
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - Laura Olbrich
- Oxford Vaccine Group, Department of Pediatrics, University of Oxford, Oxford, UK
- Division of Infectious Diseases and Tropical Medicine, University Hospital, Munich, Germany
- German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany
- Fraunhofer Institute ITMP, Immunology, Infection and Pandemic Research, Munich, Germany
| | - Else Margreet Bijker
- Oxford Vaccine Group, Department of Pediatrics, University of Oxford, Oxford, UK
- Department of Pediatrics, Maastricht University Medical Center, MosaKids Children’s Hospital, Maastricht, the Netherlands
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Kissling M, Fritschi N, Baumann P, Buettcher M, Bonhoeffer J, Naranbhai V, Ritz N. Monocyte, Lymphocyte and Neutrophil Ratios - Easy-to-Use Biomarkers for the Diagnosis of Pediatric Tuberculosis. Pediatr Infect Dis J 2023; 42:520-527. [PMID: 36977187 DOI: 10.1097/inf.0000000000003901] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
BACKGROUND The neutrophil-to-lymphocyte-ratio (NLR), neutrophil-to-monocyte-plus-lymphocyte-ratio (NMLR) and monocyte-to-lymphocyte-ratio (MLR) may have diagnostic potential for tuberculosis (TB). METHODS Data of two prospective multicenter studies in Switzerland were used, which included children <18 years with TB exposure, infection or disease or with febrile non-TB lower-respiratory-tract infection (nTB-LRTI). RESULTS Of the 389 children included 25 (6.4%) had TB disease, 12 (3.1%) TB infection, 28 (7.2%) were healthy TB exposed and 324 (83.3%) nTB-LRTI. Median (IQR) NLR was highest with 2.0 (1.2, 2.2) in children with TB disease compared to TB exposed [0.8 (0.6, 1.3); P = 0.002] and nTB-LRTI [0.3 (0.1, 1.0); P < 0.001]. Median (IQR) NMLR was highest with 1.4 (1.2, 1.7) in children with TB disease compared to healthy exposed [0.7 (0.6, 1.1); P = 0.003] and children with nTB-LRTI [0.2 (0.1, 0.6); P < 0.001). Receiver operating characteristic curves to detect TB disease compared to nTB-LRTI for NLR and NMLR had an area under the curve of 0.82 and 0.86, the sensitivity of 88% and 88%, and specificity of 71% and 76%, respectively. CONCLUSION NLR and NMLR are promising, easy-to-obtain diagnostic biomarkers to differentiate children with TB disease from other lower respiratory tract infections. These results require validation in a larger study and in settings with high and low TB endemicity.
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Affiliation(s)
- Mirjam Kissling
- From the Department of Clinical Research, Mycobacterial and Migrant Health Research Group, University of Basel, Switzerland
| | - Nora Fritschi
- From the Department of Clinical Research, Mycobacterial and Migrant Health Research Group, University of Basel, Switzerland
- University Children's Hospital Basel, Switzerland
| | - Philipp Baumann
- Department of Intensive Care Medicine and Neonatology, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland
- Infectious Disease and Vaccinology Unit, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | - Michael Buettcher
- Paediatric Infectious Diseases Unit, Children's Hospital, Lucerne Cantonal Hospital, Lucerne Switzerland
- Paediatric Pharmacology and Pharmacometrics Research Center, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | | | - Vivek Naranbhai
- Massachusetts General Hospital Cancer Center, Massachusetts General Hospital, Boston
- Dana-Farber Cancer Institute, Boston, Massachusetts
- Center for the AIDS Programme of Research in South Africa, Durban, South Africa
| | - Nicole Ritz
- From the Department of Clinical Research, Mycobacterial and Migrant Health Research Group, University of Basel, Switzerland
- University Children's Hospital Basel, Switzerland
- Paediatric Infectious Diseases Unit, Children's Hospital, Lucerne Cantonal Hospital, Lucerne Switzerland
- Department of Pediatrics, The Royal Children's Hospital Melbourne, The University of Melbourne, Australia
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Click ES, Song R, Smith JP, Mchembere W, Fajans M, Hariri P, Okeyo E, McCarthy KD, Gethi D, Odeny L, Musau S, Okumu A, Orwa J, Perez-Velez CM, Wright CA, Andres M, Marais BJ, Schaaf HS, Graham SM, Cruz AT, Cain KP. Performance of Xpert MTB/RIF and Mycobacterial Culture on Multiple Specimen Types for Diagnosis of Tuberculosis Disease in Young Children and Clinical Characterization According to Standardized Research Case Definitions. Pediatr Infect Dis J 2022; 41:671-677. [PMID: 35703284 PMCID: PMC9288526 DOI: 10.1097/inf.0000000000003582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Tuberculosis (TB) is a leading cause of illness and death in children globally. Improved bacteriologic and clinical diagnostic approaches in children are urgently needed. METHODS In a prospective cohort study, a consecutive series of young (<5 years) children presenting with symptoms suggestive of TB and parenchymal abnormality on chest radiograph in inpatient and outpatient settings in Kisumu County, Kenya from October 2013 to August 2015 were evaluated at baseline and over 6 months. Up to 14 specimens per child were tested for the Mycobacterium tuberculosis complex by fluorescence microscopy, Xpert MTB/RIF and mycobacterial culture. Using detailed clinical characterization, cases were retrospectively classified according to standardized research case definitions and the sensitivity and specificity of microbiological tests on different specimen types were determined. RESULTS Among 300 young children enrolled, 266 had sufficient information to be classified according to the research clinical case definition. Of these, 36% (96/266) had TB disease; 32% (31/96) with bacteriologically confirmed intrathoracic TB. Compared to culture, the sensitivity of a single Xpert test ranged from 60 to 67% and specificity from 97.5 to 100% for different specimen types. CONCLUSIONS Despite extensive specimen collection and laboratory testing, TB could not be bacteriologically confirmed in almost two-thirds of children with intrathoracic TB classified by research clinical case definitions. Improved diagnostic tests are needed to identify children with TB and to exclude other potential causes of illness.
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Affiliation(s)
| | - Rinn Song
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA USA
- Department of Pediatrics, Harvard Medical School, Boston, MA USA
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Jonathan P. Smith
- Department of Health Policy and Management, Yale School of Public Health, New Haven, CT USA
| | - Walter Mchembere
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | - Mark Fajans
- US Centers for Disease Control and Prevention, Atlanta, GA USA
| | - Parisa Hariri
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Elisha Okeyo
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | | | - Dickson Gethi
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | - Lazarus Odeny
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | - Susan Musau
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | - Albert Okumu
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | - James Orwa
- Kenya Medical Research Institute – Center for Global Health Research, Kisumu, Kenya
| | - Carlos M. Perez-Velez
- Pima County Health Department, Tucson, AZ USA
- University of Arizona College of Medicine, Tucson, AZ USA
| | - Colleen A. Wright
- Division of Anatomical Pathology, Stellenbosch University, Cape Town, South Africa
| | - Mariaem Andres
- Institute of Radiology, St. Luke’s Medical Center, St. Luke’s Medical Center, Global City, Philippines
| | - Ben J. Marais
- The Children’s Hospital at Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Australia
| | - H. Simon Schaaf
- Department of Paediatrics and Child Health, Stellenbosch University, Cape Town, South Africa
| | - Stephen M. Graham
- Centre for International Child Health, University of Melbourne Department of Paediatrics and Murdoch Children’s Research Institute, Royal Children’s Hospital, Melbourne, Australia
- International Union Against Tuberculosis and Lung Disease (The Union), Paris, France
| | | | - Kevin P. Cain
- Centers for Disease Control and Prevention, Kisumu, Kenya
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Baykan AH, Sayiner HS, Aydin E, Koc M, Inan I, Erturk SM. Extrapulmonary tuberculosıs: an old but resurgent problem. Insights Imaging 2022; 13:39. [PMID: 35254534 PMCID: PMC8901940 DOI: 10.1186/s13244-022-01172-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/03/2022] [Indexed: 12/13/2022] Open
Abstract
Tuberculosis (TB) primarily affects the lungs, but some of its most devastating clinical consequences arise because of its ability to spread from the lungs to other organs. Extrapulmonary TB (EPTB) constitutes 15–20% of all TB cases. Imaging findings are not always specific and can mimic many diseases; therefore, EPTB should be considered in the differential diagnosis, particularly in patients with immune system disorders (AIDS, patients receiving chemotherapy, etc.) and those in other high-risk groups including people with diabetes. The bacterium's passage to the regional lymph nodes is essential for developing a protective T-cell-mediated immune response, but the bacterium can spread hematologically and via the lymphatic system, leading to extrapulmonary involvement. Diagnosis of EPTB in high-risk patients is made based on suspected clinical and radiological findings, but further positive culture and histopathological confirmation may be required in some instances. Radiological evaluations are critical for diagnosis and crucial in planning the treatment and follow-up. This paper aims to review the typical and atypical imaging features and the differential diagnosis of EPTB.
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Abstract
BACKGROUND Tuberculosis (TB) and childhood cancers have overlapping presentations and malignancies may be misdiagnosed as TB in high TB-burden settings. METHODS This retrospective study investigated the diagnosis of TB in children with cancer registered in the Tygerberg Hospital Childhood Tumor Registry from 2008 to 2018. We studied children on anti-tuberculosis treatment (ATT) at cancer diagnosis or diagnosed with TB within 1 month of cancer diagnosis. We describe the circumstances and extent of this misdiagnosis, quantify the delay in therapy and document the outcomes of these children. RESULTS Twenty-seven of 539 (5%) children in the registry started ATT before cancer diagnosis. Both pulmonary and extrapulmonary TB complicated the cancer diagnosis. Of the 27 patients on ATT at cancer diagnosis, 22 (81%) had contact with a TB case and in 6 of 12 children (50%) a tuberculin skin test was positive. At cancer diagnosis, 16/27 (59%) children had chest radiograph changes interpreted as TB with 11/27 (41%) regarded as suggestive of TB on expert review. The median diagnostic delay between TB and cancer diagnoses was 25 days (interquartile range 3.5-58). Of 539 children with cancer, 204 (38%) died of cancer, including 18/30 (60%) children on ATT at cancer diagnosis or diagnosed with TB within 1 month of cancer diagnosis (odds ratio 2.6; 95% confidence interval: 1.2-5.4; P = 0.012). CONCLUSIONS The clinical and radiologic overlap of TB and cancer causes diagnostic confusion in a significant number of children with cancer and may contribute to increased mortality.
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Yadav R, Vaidya P, Mathew JL, Verma S, Khaneja R, Agarwal P, Kumar P, Singh M, Sethi S. Utility of Xpert MTB/RIF Assay for Diagnosis of Pediatric Tuberculosis Under Programmatic Conditions in India. J Epidemiol Glob Health 2021; 10:153-156. [PMID: 32538031 PMCID: PMC7310775 DOI: 10.2991/jegh.k.191215.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 12/07/2019] [Indexed: 11/30/2022] Open
Abstract
Tuberculosis (TB) diagnosis in children still remains a challenge in developing countries. We analyze the performance of Xpert MTB/RIF assay for the diagnosis of pediatric TB under programmatic conditions. We retrospectively analyzed the performance of Xpert MTB/RIF assay from February 2016 to March 2018. A total 2678 samples from TB suspects below 14 years were received in the laboratory and were frontline tested by Xpert MTB/RIF assay according to the manufacturer’s instructions. If sample was sufficient, the smear microscopy and culture were performed as per standard World Health Organization’s guidelines. The smears and cultures were performed in 2178 and 588 samples, respectively. Among 2678 samples, 68 were rejected, Xpert MTB/RIF assay was positive in 357/2610 (13.6%) cases, while the smear was positive in 81/2178 (3.3%) cases. The sensitivity of smear and Xpert MTB/RIF when compared with culture was 24.6% (14.1–37.8%) and 81% (68.6–90.1%), respectively. The diagnostic accuracy of Xpert MTB/RIF and smear was 97.1% and 92.2%, respectively. Thirty samples (8.5%) were detected as rifampicin resistance by Xpert MTB/RIF assay. The Xpert MTB/RIF increased the detection rate up to fourfold when compared with smear microscopy. Xpert MTB/RIF assay is the most rapid, sensitive, and specific method for microbiological confirmation and rifampicin resistance detection in pediatric tuberculosis.
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Affiliation(s)
- Rakesh Yadav
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Pankaj Vaidya
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Joseph L Mathew
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sanjay Verma
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | | | | | - Pankaj Kumar
- Department of Paediatrics, Govt Medical College, Chandigarh, India
| | - Meenu Singh
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sunil Sethi
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Song R, Click ES, McCarthy KD, Heilig CM, Mchembere W, Smith JP, Fajans M, Musau SK, Okeyo E, Okumu A, Orwa J, Gethi D, Odeny L, Lee SH, Perez-Velez CM, Wright CA, Cain KP. Sensitive and Feasible Specimen Collection and Testing Strategies for Diagnosing Tuberculosis in Young Children. JAMA Pediatr 2021; 175:e206069. [PMID: 33616611 PMCID: PMC7900937 DOI: 10.1001/jamapediatrics.2020.6069] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Criterion-standard specimens for tuberculosis diagnosis in young children, gastric aspirate (GA) and induced sputum, are invasive and rarely collected in resource-limited settings. A far less invasive approach to tuberculosis diagnostic testing in children younger than 5 years as sensitive as current reference standards is important to identify. OBJECTIVE To characterize the sensitivity of preferably minimally invasive specimen and assay combinations relative to maximum observed yield from all specimens and assays combined. DESIGN, SETTING, AND PARTICIPANTS In this prospective cross-sectional diagnostic study, the reference standard was a panel of up to 2 samples of each of 6 specimen types tested for Mycobacterium tuberculosis complex by Xpert MTB/RIF assay and mycobacteria growth indicator tube culture. Multiple different combinations of specimens and tests were evaluated as index tests. A consecutive series of children was recruited from inpatient and outpatient settings in Kisumu County, Kenya, between October 2013 and August 2015. Participants were children younger than 5 years who had symptoms of tuberculosis (unexplained cough, fever, malnutrition) and parenchymal abnormality on chest radiography or who had cervical lymphadenopathy. Children with 1 or more evaluable specimen for 4 or more primary study specimen types were included in the analysis. Data were analyzed from February 2015 to October 2020. MAIN OUTCOMES AND MEASURES Cumulative and incremental diagnostic yield of combinations of specimen types and tests relative to the maximum observed yield. RESULTS Of the 300 enrolled children, the median (interquartile range) age was 2.0 (1.0-3.6) years, and 151 (50.3%) were female. A total of 294 met criteria for analysis. Of 31 participants with confirmed tuberculosis (maximum observed yield), 24 (sensitivity, 77%; interdecile range, 68%-87%) had positive results on up to 2 GA samples and 20 (sensitivity, 64%; interdecile range, 53%-76%) had positive test results on up to 2 induced sputum samples. The yields of 2 nasopharyngeal aspirate (NPA) samples (23 of 31 [sensitivity, 74%; interdecile range, 64%-84%]), of 1 NPA sample and 1 stool sample (22 of 31 [sensitivity, 71%; interdecile range, 60%-81%]), or of 1 NPA sample and 1 urine sample (21.5 of 31 [sensitivity, 69%; interdecile range, 58%-80%]) were similar to reference-standard specimens. Combining up to 2 each of GA and NPA samples had an average yield of 90% (28 of 31). CONCLUSIONS AND RELEVANCE NPA, in duplicate or in combination with stool or urine specimens, was readily obtainable and had diagnostic yield comparable with reference-standard specimens. This combination could improve tuberculosis diagnosis among children in resource-limited settings. Combining GA and NPA had greater yield than that of the current reference standards and may be useful in certain clinical and research settings.
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Affiliation(s)
- Rinn Song
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, Massachusetts,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts,Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | | | | | | | - Walter Mchembere
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - Jonathan P. Smith
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia,Northrop Grumman, Atlanta, Georgia
| | - Mark Fajans
- US Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Susan K. Musau
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - Elisha Okeyo
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - Albert Okumu
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - James Orwa
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - Dickson Gethi
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - Lazarus Odeny
- Kenya Medical Research Institute, Center for Global Health Research, Kisumu, Kenya
| | - Scott H. Lee
- US Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Carlos M. Perez-Velez
- Tuberculosis Clinic, Pima County Health Department, Tucson, Arizona,Infectious Diseases, University of Arizona College of Medicine, Tucson
| | - Colleen A. Wright
- Division of Anatomical Pathology, University of Stellenbosch, Cape Town, South Africa
| | - Kevin P. Cain
- US Centers for Disease Control and Prevention, Kisumu, Kenya
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Diagnostic Performance of the Fujifilm SILVAMP TB-LAM in Children with Presumptive Tuberculosis. J Clin Med 2021; 10:jcm10091914. [PMID: 33925008 PMCID: PMC8124322 DOI: 10.3390/jcm10091914] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/17/2021] [Accepted: 04/23/2021] [Indexed: 11/16/2022] Open
Abstract
Current diagnostics for tuberculosis (TB) only manage to confirm a small proportion of children with TB and require respiratory samples, which are difficult to obtain. There is a need for non-invasive biomarker-based tests as an alternative to sputum testing. Fujifilm SILVAMP TB lipoarabinomannan (FujiLAM), a lateral-flow test to detect lipoarabinomannan in urine, is a novel non-sputum-based point-of-care diagnostic reported to have increased sensitivity for the diagnosis of TB among human immunodeficiency virus (HIV)-infected adults. We evaluate the performance of FujiLAM in children with presumptive TB. Fifty-nine children attending a paediatric hospital in Haiti with compatible signs and symptoms of TB were examined using Xpert MTB/RIF, smear microscopy and X-rays, and classified according to the certainty of diagnosis into bacteriologically confirmed TB (n = 5), unconfirmed TB (bacteriologically negative, n = 50) and unlikely TB (n = 4). Healthy children (n = 20) were enrolled as controls. FujiLAM sensitivity and specificity were 60% and 95% among children with confirmed TB. FujiLAM's high specificity and its characteristics as a point-of-care indicate the test has a good potential for the diagnosis of TB in children.
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Khambati N, Olbrich L, Ellner J, Salgame P, Song R, Bijker EM. Host-Based Biomarkers in Saliva for the Diagnosis of Pulmonary Tuberculosis in Children: A Mini-Review. Front Pediatr 2021; 9:756043. [PMID: 34760853 PMCID: PMC8575443 DOI: 10.3389/fped.2021.756043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 09/27/2021] [Indexed: 12/28/2022] Open
Abstract
The diagnosis of pulmonary tuberculosis (TB) in children remains a significant challenge due to its paucibacillary nature, non-specificity of symptoms and suboptimal sensitivity of available diagnostic methods. In young children particularly, it is difficult to obtain high-quality sputum specimens for testing, with this group the least likely to be diagnosed, while most at risk of severe disease. The World Health Organization (WHO) has prioritized research into rapid biomarker-based tests for TB using easily obtainable non-sputum samples, such as saliva. However, the role of biomarkers in saliva for diagnosing TB in children has not been fully explored. In this mini-review, we discuss the value of saliva as a diagnostic specimen in children given its ready availability and non-invasive nature of collection, and review the literature on the use of host-based biomarkers in saliva for diagnosing active pulmonary TB in adults and children. Based on available data from adult studies, we highlight that combinations of cytokines and other proteins show promise in reaching WHO-endorsed target product profiles for new TB triage tests. Given the lack of pediatric research on host biomarkers in saliva and the differing immune response to TB infection between children and adults, we recommend that pediatric studies are now performed to discover and validate salivary host biosignatures for diagnosing pulmonary TB in children. Future directions for pediatric saliva studies are discussed, with suggestions for technologies that can be applied for salivary biomarker discovery and point-of-care test development.
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Affiliation(s)
- Nisreen Khambati
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Laura Olbrich
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom.,Division of Infectious Diseases and Tropical Medicine, University Hospital, Ludwig Maximilian University of Munich, Munich, Germany.,German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Jerrold Ellner
- Department of Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
| | - Padmini Salgame
- Department of Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
| | - Rinn Song
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom.,Division of Infectious Diseases, Boston Children's Hospital, Boston, MA, United States
| | - Else Margreet Bijker
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
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12
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Yadav R, Vaidya P, Mathew JL, Singh S, Khaneja R, Agarwal P, Singh M, Sethi S. Diagnostic accuracy of Xpert MTB/RIF ultra for detection of Mycobacterium tuberculosis in children: a prospective cohort study. Lett Appl Microbiol 2020; 72:225-230. [PMID: 33090531 DOI: 10.1111/lam.13402] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 09/29/2020] [Accepted: 09/29/2020] [Indexed: 12/11/2022]
Abstract
The Xpert MTB/RIF Ultra is a recent advancement in molecular diagnostics of tuberculosis (TB) with higher sensitivity compared to its predecessor, the Xpert MTB/RIF assay. Prospective studies evaluating the performance of Xpert MTB/RIF Ultra in children with suspected TB are lacking. In this study, we evaluated the Xpert MTB/RIF Ultra for detection of Mycobacterium tuberculosis in samples from 156 children, of which one was excluded from the analysis. Of the remaining 155 samples, 6·5% (10/155), 21·3% (33/155), 20% (31/155) and 21·9% (34/155) were positive by smear examination, MGIT culture, Xpert MTB/RIF and Xpert MTB/RIF Ultra, respectively. The Xpert MTB/RIF and Xpert MTB/RIF Ultra had a similar overall sensitivity of 81·8% (95% CI: 64·5-93) and 84·8% (95% CI: 68·1-94·9), respectively. In suspected pediatric TB patients, the Xpert MTB/RIF Ultra had higher sensitivity compared to the Xpert MTB/RIF (72·7 vs 63·6). The AUC (area under the curve) of 0·905 for the Xpert MTB/RIF and 0·893 for the Xpert MTB/RIF Ultra indicate similar and good overall performance. Both Xpert assays were found to be equally efficient, however Xpert MTB/RIF Ultra showed better detection rate in suspected TB cases.
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Affiliation(s)
- R Yadav
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - P Vaidya
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - J L Mathew
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - S Singh
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | | | - P Agarwal
- WHO Country Office for India, New Delhi, India
| | - M Singh
- Pediatric Medicine, Advanced Pediatric Center, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - S Sethi
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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13
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Aurilio RB, Luiz RR, Land MGP, Cardoso CAA, Kritski AL, Sant'Anna CC. The clinical and molecular diagnosis of childhood and adolescent pulmonary tuberculosis in referral centers. Rev Soc Bras Med Trop 2020; 53:e20200205. [PMID: 32997050 PMCID: PMC7523522 DOI: 10.1590/0037-8682-0205-2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 06/26/2020] [Indexed: 01/14/2023] Open
Abstract
INTRODUCTION: The diagnostic accuracy of Xpert MTB/RIF (Xpert) in pulmonary tuberculosis
(PTB) in children is lower than in adults. In Brazil, the diagnosis of PTB
is based on a diagnostic score system (DSS). This study aims to study the
role of Xpert in children and adolescents with PTB symptoms. METHODS: A cross-sectional study was conducted in 3 referral centers to TB. Children and
adolescents (0-19 years old) whose respiratory samples were submitted to
Xpert were included. Statistical analysis (bivariate and logistic
regression) to assess the simultaneous influence of TB-related variables on
the occurrence of Xpert detectable in TB cases was done. To evaluate the
agreement or disagreement between Xpert results with acid-fast bacillus
(AFB) and cultures, κ method was used (significancy level of 5%). RESULTS: Eighty-eight patients were included in the study and PTB occurred in 43
patients (49%) and Xpert was detectable in 21 patients (24%). Adolescents
and positive culture results were independent predictive variables of Xpert
positivity. DSS sensitivity compared with the final diagnosis of TB was 100%
(95% CI, 88.1-100%), specificity was 97.2% (95% CI, 85.5-99.9%). The
accuracy of the method was 98.5% (95% CI, 91.7-99.9%). CONCLUSIONS: Xpert contributed to diagnosis in 9% of patients with AFB and in culture
negative cases. DSS indicated relevance for this diagnostic approach of
intrathoracic TB (ITB) in reference centers for presenting data both with
high sensitivity and specificity.
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Affiliation(s)
- Rafaela Baroni Aurilio
- Universidade Federal do Rio de Janeiro, Departamento de Pediatria da Faculdade de Medicina, Instituto de Puericultura e Pediatria Martagão Gesteira, Rio de Janeiro, RJ, Brasil
| | - Ronir Raggio Luiz
- Universidade Federal do Rio de Janeiro, Instituto de Estudos de Saúde Coletiva, Rio de Janeiro, RJ, Brasil
| | - Marcelo Gerardin Poirot Land
- Universidade Federal do Rio de Janeiro, Departamento de Pediatria da Faculdade de Medicina, Instituto de Puericultura e Pediatria Martagão Gesteira, Rio de Janeiro, RJ, Brasil
| | | | - Afrânio Lineu Kritski
- Universidade Federal do Rio de Janeiro, Programa Acadêmico de Tuberculose da Faculdade de Medicina, Instituto de Doenças do Tórax/Hospital Universitário Clementino Fraga Filho, Rio de Janeiro, RJ, Brasil
| | - Clemax Couto Sant'Anna
- Universidade Federal do Rio de Janeiro, Departamento de Pediatria da Faculdade de Medicina, Instituto de Puericultura e Pediatria Martagão Gesteira, Rio de Janeiro, RJ, Brasil
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14
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Abstract
PURPOSE OF REVIEW The present review focuses on recent advances and current challenges in screening, diagnosis and management of tuberculosis (TB) in children, encompassing TB infection and TB disease, and public health priorities for screening and family engagement. RECENT FINDINGS Although awareness has improved in recent years that children in TB endemic areas suffer a huge disease burden, translation into better prevention and care remains challenging. Recent WHO guidelines have incorporated screening of all household contacts of pulmonary TB cases, but implementation in high incidence settings remains limited. Improved tests using noninvasive samples, such as the lateral flow urinary lipoarabinomannan assay and the new Xpert Ultra assay applied to induced sputum or stool in young children, are showing promise and further assessment is eagerly awaited. From a treatment perspective, child-friendly dispersible fixed dose combination tablets are now widely available with excellent acceptability and tolerance reported in young children. SUMMARY High-level government commitment to TB control as a public health priority and feasible strategies to achieve this are required to contain the global epidemic, whereas strong engagement of local TB clinics and affected families in TB prevention is essential to limit secondary cases and protect exposed children.
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Affiliation(s)
| | - Ben J Marais
- Department of Infectious Diseases & Microbiology, The Children's Hospital at Westmead, Westmead.,Discipline of Child and Adolescent Health.,Marie Bashir Institute for Infectious Diseases & Biosecurity, University of Sydney, Sydney, New South Wales, Australia
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15
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Gupta A, Swindells S, Kim S, Hughes MD, Naini L, Wu X, Dawson R, Mave V, Sanchez J, Mendoza A, Gonzales P, Kumarasamy N, Comins K, Conradie F, Shenje J, Fontain SN, Garcia-Prats A, Asmelash A, Nedsuwan S, Mohapi L, Lalloo UG, Ferreira ACG, Mugah C, Harrington M, Jones L, Cox SR, Smith B, Shah NS, Hesseling AC, Churchyard G. Feasibility of Identifying Household Contacts of Rifampin-and Multidrug-resistant Tuberculosis Cases at High Risk of Progression to Tuberculosis Disease. Clin Infect Dis 2020; 70:425-435. [PMID: 30942853 PMCID: PMC7188224 DOI: 10.1093/cid/ciz235] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 03/26/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND We assessed multidrug-resistant tuberculosis (MDR-TB) cases and their household contacts (HHCs) to inform the development of an interventional clinical trial. METHODS We conducted a cross-sectional study of adult MDR-TB cases and their HHCs in 8 countries with high TB burdens. HHCs underwent symptom screenings, chest radiographies, sputum TB bacteriologies, TB infection (TBI) testing (tuberculin skin test [TST] and interferon gamma release assay [IGRA]), and human immunodeficiency virus (HIV) testing. RESULTS From October 2015 to April 2016, 1016 HHCs from 284 MDR-TB cases were enrolled. At diagnosis, 69% of MDR-TB cases were positive for acid-fast bacilli sputum smears and 43% had cavitary disease; at study entry, 35% remained smear positive after a median MDR-TB treatment duration of 8.8 weeks. There were 9 HHCs that were diagnosed with TB prior to entry and excluded. Of the remaining 1007 HHCs, 41% were male and the median age was 25 years. There were 121 (12%) HHCs that had new cases of TB identified: 17 (2%) were confirmed, 33 (3%) probable, and 71 (7%) possible TB cases. The TBI prevalence (defined as either TST or IGRA positivity) was 72% and varied by age, test used, and country. Of 1007 HHCs, 775 (77%) were considered high-risk per these mutually exclusive groups: 102 (10%) were aged <5 years; 63 (6%) were aged ≥5 and were infected with HIV; and 610 (61%) were aged ≥5 years, were negative for HIV or had an unknown HIV status, and were TBI positive. Only 21 (2%) HHCs were on preventive therapy. CONCLUSIONS The majority of HHCs in these high-burden countries were at high risk of TB disease and infection, yet few were receiving routine preventive therapy. Trials of novel, preventive therapies are urgently needed to inform treatment policy and practice.
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Affiliation(s)
- Amita Gupta
- Johns Hopkins University, Department of Medicine, Baltimore, Maryland
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research Site, Pune, India
| | | | - Soyeon Kim
- Frontier Science & Technology Research Foundation, Amherst, New York
| | - Michael D Hughes
- Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Linda Naini
- Social & Scientific Systems, Silver Spring, Maryland
| | - Xingye Wu
- Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Rodney Dawson
- University of Cape Town Lung Institute and Department of Medicine, University of Cape Town, South Africa
| | - Vidya Mave
- Johns Hopkins University, Department of Medicine, Baltimore, Maryland
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research Site, Pune, India
| | - Jorge Sanchez
- Asociación Civil Impacta Salud y Educación, Lima, Peru
| | - Alberto Mendoza
- TASK Applied Science Clinical Research Site, Bellville, South Africa
| | | | | | - Kyla Comins
- TASK Applied Science Clinical Research Site, Bellville
| | - Francesca Conradie
- University of the Witwatersrand Helen Joseph Hospital, Johannesburg, South Africa
| | - Justin Shenje
- South African Tuberculosis Vaccine Initiative, Cape Town, South Africa
| | - Sandy Nerette Fontain
- GHESKIO Centers Institute of Infectious Diseases and Reproductive Health, Port-au-Prince, Haiti
| | - Anthony Garcia-Prats
- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, Stellenbosch University, Cape Town, South Africa
| | | | | | - Lerato Mohapi
- Soweto Clinical Research Site, University of the Witwatersrand, Johannesburg, South Africa
| | - Umesh G Lalloo
- Durban International Clinical Research Site, Durban University of Technology, South Africa
| | | | | | | | - Lynne Jones
- Frontier Science & Technology Research Foundation, Amherst, New York
| | - Samyra R Cox
- Johns Hopkins University, Department of Medicine, Baltimore, Maryland
| | - Betsy Smith
- National Institutes of Health, Bethesda, Maryland
| | - N Sarita Shah
- US Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anneke C Hesseling
- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, Stellenbosch University, Cape Town, South Africa
| | - Gavin Churchyard
- Aurum Institute, Parktown, South Africa
- University of Witwatersrand, School of Public Health
- Advancing Care and Treatment, South African Medical Research Council, Johannesburg, South Africa
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16
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Monocyte-to-Lymphocyte Ratio Is Associated With Tuberculosis Disease and Declines With Anti-TB Treatment in HIV-Infected Children. J Acquir Immune Defic Syndr 2019; 80:174-181. [PMID: 30399036 DOI: 10.1097/qai.0000000000001893] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND The blood monocyte-to-lymphocyte ratio (MLR) is associated with active tuberculosis (TB) in adults but has not been evaluated as a TB diagnostic biomarker in HIV-infected children in whom respiratory sampling is difficult. SETTING In a cohort of HIV-infected hospitalized Kenyan children initiating antiretroviral therapy, absolute monocyte and lymphocyte counts were determined at enrollment and 4, 12, and 24 weeks thereafter. METHODS Children were classified as confirmed, unconfirmed, or unlikely pulmonary TB. Receiver operating characteristic curves of MLR cutoff values were generated to distinguish children with confirmed TB from those with unconfirmed and unlikely TB. General estimating equations were used to estimate change in the MLR over time by TB status. RESULTS Of 160 children with median age 23 months, 13 (8.1%) had confirmed TB and 67 (41.9%) had unconfirmed TB. The median MLR among children with confirmed TB {0.407 [interquartile range (IQR) 0.378-0.675]} was higher than the MLR in children with unconfirmed [0.207 (IQR 0.148-0.348), P < 0.01] or unlikely [0.212 (IQR 0.138-0.391), P = 0.01] TB. The MLR above 0.378 identified children with confirmed TB with 77% sensitivity, 78% specificity, 24% positive predictive value, and 97% negative predictive value. After TB treatment, the median MLR declined in children with confirmed TB and levels were similar to children with unlikely TB after 12 weeks. CONCLUSIONS The blood MLR distinguished HIV-infected children with confirmed TB from those with unlikely TB and declined with TB treatment. The MLR may be a useful diagnostic tool for TB in settings where respiratory-based microbiologic confirmation is inaccessible.
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17
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Comella-Del-Barrio P, Abellana R, Villar-Hernández R, Jean Coute MD, Sallés Mingels B, Canales Aliaga L, Narcisse M, Gautier J, Ascaso C, Latorre I, Dominguez J, Perez-Porcuna TM. A Model Based on the Combination of IFN-γ, IP-10, Ferritin and 25-Hydroxyvitamin D for Discriminating Latent From Active Tuberculosis in Children. Front Microbiol 2019; 10:1855. [PMID: 31474956 PMCID: PMC6702835 DOI: 10.3389/fmicb.2019.01855] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 07/29/2019] [Indexed: 01/31/2023] Open
Abstract
In recent years, pediatric research on tuberculosis (TB) has focused on addressing new biomarkers with the potential to be used as immunological non-sputum-based methods for the diagnosis of TB in children. The aim of this study was to characterize a set of cytokines and a series of individual factors (ferritin, 25-hydroxyvitamin D [25(OH)D], parasite infections, and nutritional status) to assess different patterns for discriminating between active TB and latent TB infection (LTBI) in children. The levels of 13 cytokines in QuantiFERON-TB Gold In-Tube (QFT-GIT) supernatants were analyzed in 166 children: 74 with active TB, 37 with LTBI, and 55 uninfected controls. All cytokines were quantified using Luminex or ELISA. Ferritin and 25(OH)D were also evaluated using CLIA, and Toxocara canis Ig-G antibodies were detected with a commercial ELISA kit. The combination of IP-10, IFN-γ, ferritin, and 25(OH)D achieved the best diagnostic performance to discriminate between active TB and LTBI cases in children in relation to the area under receiver operating characteristic (ROC) curve 0.955 (confidence interval 95%: 0.91–1.00), achieving optimal sensitivity and specificity for the development of a new test (93.2 and 90.0%, respectively). Children with TB showed higher ferritin levels and an inverse correlation between 25(OH)D and IFN-γ levels. The model proposed includes a combination of biomarkers for discriminating between active TB and LTBI in children to improve the accuracy of TB diagnosis in children. This combination of biomarkers might have potential for identifying the onset of primary TB in children.
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Affiliation(s)
- Patricia Comella-Del-Barrio
- Research Institute Germans Trias i Pujol, CIBER Respiratory Diseases, Universitat Autònoma de Barcelona, Badalona, Spain
| | - Rosa Abellana
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - Raquel Villar-Hernández
- Research Institute Germans Trias i Pujol, CIBER Respiratory Diseases, Universitat Autònoma de Barcelona, Badalona, Spain
| | | | | | - Lydia Canales Aliaga
- Radiology Service, Research Unit of the Mútua Terrassa Foundation, University Hospital Mútua Terrassa, Terrassa, Spain
| | | | | | - Carlos Ascaso
- Department of Basic Clinical Practice, Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - Irene Latorre
- Research Institute Germans Trias i Pujol, CIBER Respiratory Diseases, Universitat Autònoma de Barcelona, Badalona, Spain
| | - Jose Dominguez
- Research Institute Germans Trias i Pujol, CIBER Respiratory Diseases, Universitat Autònoma de Barcelona, Badalona, Spain
| | - Tomas M Perez-Porcuna
- Department of Pediatrics, Tuberculosis and International Health Care Unit, Primary Care and Mútua Terrassa University Hospital, University of Barcelona, Terrassa, Spain
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18
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Newer Drugs for Tuberculosis Prevention and Treatment in Children. Indian J Pediatr 2019; 86:725-731. [PMID: 30707347 DOI: 10.1007/s12098-018-02854-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 12/26/2018] [Indexed: 01/01/2023]
Abstract
Children suffer a huge and often an unrecognized burden of tuberculosis (TB) in endemic countries like India. Better data have improved the visibility of childhood TB, but the establishment of functional TB prevention and treatment programs for children remains challenging. Barriers to TB prevention include: 1) non-implementation of existing guidelines, 2) perceived inability to rule out active TB with fear of creating drug resistance and 3) limited local guidance on the use of preventive therapy after close contact with drug resistant TB. Barriers to TB treatment include: 1) diagnostic challenges in resource-limited settings, 2) presentation to maternal and child health (MCH) services with poor linkage to the TB control program and 3) limited local guidance on the treatment of children with likely drug resistant TB. The authors provide an overview of newer drugs used for TB prevention and treatment in children. They discuss new options for the treatment of latent TB infection (LTBI) and new or repurposed drugs used in the treatment of children with multidrug resistant (MDR)-TB. The background information provided describes the benefits, risks and feasibility of various treatment options, which should assist treatment decisions until updated World Health Organization (WHO) guidance becomes available.
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19
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Affiliation(s)
- Peter J Holmberg
- General Pediatric and Adolescent Medicine, Mayo Clinic Children's Center, Rochester, MN
| | - Eugene Owusu-Achaw
- Department of Pediatric Medicine, Dormaa Presbyterian Hospital, Dormaa-Ahenkro, Brong Ahafo, Ghana
| | - Adoma Dwomo-Fokuo
- Department of Pediatric Medicine, Dormaa Presbyterian Hospital, Dormaa-Ahenkro, Brong Ahafo, Ghana
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20
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Tafur KT, Coit J, Leon SR, Pinedo C, Chiang SS, Contreras C, Calderon R, Mendoza MJ, Lecca L, Franke MF. Feasibility of the string test for tuberculosis diagnosis in children between 4 and 14 years old. BMC Infect Dis 2018; 18:574. [PMID: 30442105 PMCID: PMC6238308 DOI: 10.1186/s12879-018-3483-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/31/2018] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The enteric string test can be used to obtain a specimen for microbiological confirmation of tuberculosis in children, but it is not widely used for this. The aim of this analysis to evaluate this approach in children with tuberculosis symptoms. METHODS We conducted a cross-sectional study to assess children's ability to complete the test (feasibility), and self-reported pain (tolerability). We examined caregivers' and children's willingness to repeat the procedure (acceptability) and described the diagnostic yield of cultures for diagnostic tools. We stratified estimates by age and compared metrics to those derived for gastric aspirate (GA). RESULTS Among 148 children who attempted the string test, 34% successfully swallowed the capsule. Feasibility was higher among children aged 11-14 than in children 4-10 years (83% vs 22% respectively, p < 0.0001). The string test was better tolerated than GA in both age groups; however, guardians and older children reported higher rates of willingness to repeat GA than the string test (86% vs. 58% in children; 100% vs. 83% in guardians). In 9 children with a positive sputum culture, 6 had a positive string culture. The one children with a positive gastric aspirate culture also had a positive string culture. CONCLUSION Although the string test was generally tolerable and accepted by children and caregivers; feasibility in young children was low. Reducing the capsule size may improve test success rates in younger children.
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Affiliation(s)
- Karla T. Tafur
- Socios En Salud Sucursal Perú, Av. Túpac Amaru 4480, Comas, Lima, Peru
| | - Julia Coit
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA USA
| | - Segundo R. Leon
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA USA
| | - Cynthia Pinedo
- Socios En Salud Sucursal Perú, Av. Túpac Amaru 4480, Comas, Lima, Peru
| | - Silvia S. Chiang
- Department of Pediatrics, Alpert Medical School of Brown University, Providence, RI USA
- Center for International Health Research. Rhode Island Hospital, Providence, RI USA
| | - Carmen Contreras
- Socios En Salud Sucursal Perú, Av. Túpac Amaru 4480, Comas, Lima, Peru
| | - Roger Calderon
- Socios En Salud Sucursal Perú, Av. Túpac Amaru 4480, Comas, Lima, Peru
| | | | - Leonid Lecca
- Socios En Salud Sucursal Perú, Av. Túpac Amaru 4480, Comas, Lima, Peru
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA USA
| | - Molly F. Franke
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, MA USA
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21
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TB Presenting as Recurrent Pneumonia in a HIV-Infected Infant in Central Viet Nam. REPORTS 2018. [DOI: 10.3390/reports1020012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We report on a six-month-old infant admitted to our intensive care unit (ICU) with recurrent severe pneumonia. The mother was infected with human immunodeficiency virus (HIV)-infected, but initially failed to disclose this to doctors. Neither did she report the grandmother of the child’s chronic coughing, likely due to tuberculosis (TB). The infant was diagnosed with X-pert MTB/RIF® confirmed TB and tested positive for HIV infection. Once a correct diagnosis was established, the child demonstrated good recovery with appropriate TB and antiretroviral treatment (ART). The case demonstrates the importance of including TB in the differential diagnosis for young children not responding to first-line pneumonia treatment, especially in TB endemic areas. Taking a meticulous TB and HIV exposure history, with careful consideration of potential social stigma, is essential. It also demonstrates how the inaccessibility of HIV results and the absence of a continuous patient record may jeopardize patient care.
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22
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Sabi I, Rachow A, Mapamba D, Clowes P, Ntinginya NE, Sasamalo M, Kamwela L, Haraka F, Hoelscher M, Paris DH, Saathoff E, Reither K. Xpert MTB/RIF Ultra assay for the diagnosis of pulmonary tuberculosis in children: a multicentre comparative accuracy study. J Infect 2018; 77:321-327. [PMID: 30036606 DOI: 10.1016/j.jinf.2018.07.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 02/01/2023]
Abstract
OBJECTIVES We evaluated the diagnostic performance of the novel next-generation Xpert MTB/RIF Ultra (Xpert Ultra) in comparison to Xpert MTB/RIF (Xpert) assay for the detection of paediatric pulmonary tuberculosis in high burden settings. METHODS From May 2011 to September 2012, children with suspected pulmonary tuberculosis were enrolled at two Tanzanian sites and sputum samples were examined using sputum smear, Xpert and culture. Xpert Ultra was tested between January and June 2017 using sputum pellets, which had been stored at -80°C. The diagnostic accuracy of Ultra versus Xpert was determined using well-defined case definitions as reference standard. RESULTS In total, 215 children were included. The median age was 5.4 years, the HIV prevalence was 52% and 13% had culture-confirmed pulmonary tuberculosis. When only the first available sample of each patient was analysed, the sensitivity of Xpert Ultra was 64.3 % (95% CI: 44.1 to 81.4) while that of Xpert was 53.6% (95%CI: 33.9 to 72.5). The specificity of Xpert Ultra based on analysis of all available samples was 98.1% (95%CI: 93.4 to 99.7), that of Xpert was 100%. CONCLUSIONS Xpert Ultra was found to have a higher sensitivity, but slightly reduced specificity compared to Xpert in detecting pulmonary tuberculosis in children.
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Affiliation(s)
- Issa Sabi
- NIMR-Mbeya Medical Research Center, Mbeya, United Republic of Tanzania
| | - Andrea Rachow
- Division of Infectious Diseases and Tropical Medicine, Medical Center of the University of Munich (LMU), Munich, Germany; German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Daniel Mapamba
- NIMR-Mbeya Medical Research Center, Mbeya, United Republic of Tanzania
| | - Petra Clowes
- NIMR-Mbeya Medical Research Center, Mbeya, United Republic of Tanzania
| | | | | | - Lujeko Kamwela
- Ifakara Health Institute, Bagamoyo, United Republic of Tanzania
| | - Frederick Haraka
- Ifakara Health Institute, Bagamoyo, United Republic of Tanzania; Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - Michael Hoelscher
- Division of Infectious Diseases and Tropical Medicine, Medical Center of the University of Munich (LMU), Munich, Germany; German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Daniel H Paris
- Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - Elmar Saathoff
- Division of Infectious Diseases and Tropical Medicine, Medical Center of the University of Munich (LMU), Munich, Germany; German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Klaus Reither
- Ifakara Health Institute, Bagamoyo, United Republic of Tanzania; Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland.
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23
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Moore DP, Murdoch DR, O' Brien KL, Madhi SA. Reply to Drancourt. Clin Infect Dis 2017; 65:2159. [PMID: 29020362 DOI: 10.1093/cid/cix715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- David P Moore
- Medical Research Council: Respiratory and Meningeal Pathogens Research Unit.,Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases Unit.,Department of Paediatrics and Child Health, Chris Hani Baragwanath Academic Hospital, and University of the Witwatersrand, Johannesburg, South Africa
| | - David R Murdoch
- Department of Pathology, University of Otago.,Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
| | - Katherine L O' Brien
- Department of International Health, International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Shabir A Madhi
- Medical Research Council: Respiratory and Meningeal Pathogens Research Unit.,Department of Science and Technology/National Research Foundation: Vaccine Preventable Diseases Unit
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24
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X-pert MTB/RIF ® Diagnosis of Twin Infants with Tuberculosis in Da Nang, Viet Nam. J Clin Med 2017; 6:jcm6100096. [PMID: 29039758 PMCID: PMC5664011 DOI: 10.3390/jcm6100096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/06/2017] [Accepted: 10/11/2017] [Indexed: 11/16/2022] Open
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