Febrile illness in high-risk children : a prospective, international observational study

Funding Information: This project received funding under the European Union’s Horizon2020 research and innovation programme, grant agreement number 668303. UK enrolment was supported by NIHR Biomedical Research Centres at Imperial College London, and Newcastle. Publisher Copyright: © 2022, The Author(s).To assess and describe the aetiology and management of febrile illness in children with primary or acquired immunodeficiency at high risk of serious bacterial infection, as seen in emergency departments in tertiary hospitals. Prospective data on demographics, presenting features, investigations, microbiology, management, and outcome of patients within the ‘Biomarker Validation in HR patients’ database in PERFORM, were analysed. Immunocompromised children (< 18 years old) presented to fifteen European hospitals in nine countries, and one Gambian hospital, with fever or suspected infection and clinical indication for blood investigations. Febrile episodes were assigned clinical phenotypes using the validated PERFORM algorithm. Logistic regression was used to assess the effect size of predictive features of proven/presumed bacterial or viral infection. A total of 599 episodes in 482 children were analysed. Seventy-eight episodes (13.0%) were definite bacterial, 67 episodes probable bacterial (11.2%), and 29 bacterial syndrome (4.8%). Fifty-five were definite viral (9.2%), 49 probable viral (8.2%), and 23 viral syndrome (3.8%). One hundred ninety were unknown bacterial or viral infections (31.7%), and 108 had inflammatory or other non-infectious causes of fever (18.1%). Predictive features of proven/presumed bacterial infection were ill appearance (OR 3.1 (95% CI 2.1–4.6)) and HIV (OR 10.4 (95% CI 2.0–54.4)). Ill appearance reduced the odds of having a proven/presumed viral infection (OR 0.5 (95% CI 0.3–0.9)). A total of 82.1% had new empirical antibiotics started on admission (N = 492); 94.3% proven/presumed bacterial (N = 164), 66.1% proven/presumed viral (N = 84), and 93.2% unknown bacterial or viral infections (N = 177). Mortality was 1.9% (N = 11) and 87.1% made full recovery (N = 522). Conclusion: The aetiology of febrile illness in immunocompromised children is diverse. In one-third of cases, no cause for the fever will be identified. Justification for standard intravenous antibiotic treatment for every febrile immunocompromised child is debatable, yet effective. Better clinical decision-making tools and new biomarkers are needed for this population.What is Known:• Immunosuppressed children are at high risk for morbidity and mortality of serious bacterial and viral infection, but often present with fever as only clinical symptom.• Current diagnostic measures in this group are not specific to rule out bacterial infection, and positivity rates of microbiological cultures are low.What is New:• Febrile illness and infectious complications remain a significant cause of mortality and morbidity in HR children, yet management is effective.• The aetiology of febrile illness in immunocompromised children is diverse, and development of pathways for early discharge or cessation of intravenous antibiotics is debatable, and requires better clinical decision-making tools and biomarkers.publishersversionPeer reviewe

Relationship between molecular pathogen detection and clinical disease in febrile children across Europe : a multicentre, prospective observational study

Funding Information: EU Horizon 2020 grant 668303.We are grateful to all patients and families that contributed towards this study. This project received funding under the European Union's Horizon 2020 Research and Innovation program under grant agreement number 668303. PERFORM consortium activities included obtaining study funding, patient recruitment, clinical data collection and entry, assignment of patient phenotypes, processing and storage of research samples used in this analysis, and molecular pathogen testing. The PERFORM Consortium, The members of the PERFORM consortium are as follows: Priyen Shah, Marie Voice, Leonides Calvo-Bado, Irene Rivero Calle, Sophie Morris, Ruud Nijman, Claire Broderick, Tisham De, Irini Eleftheriou, Rachel Galassini, Aakash Khanijau, Laura Kolberg, Mojca Kolnik, Aleksandra Rudzate, Manfred Sagmeister, Nina Schweintzger, Fatou Secka, Clare Thakker, Fabian Van der Velden, Clementien Vermont, Katarina Vincek, Philipp KA Agyeman, Aubrey J Cunnington, Ronald De Groot, Marieke Emonts, Katy Fidler, Taco Kuijpers, Marine Mommert-Tripon, Karen Brengel-Pesce, Francois Mallet, Henriette Moll, Stéphane Paulus, Marko Pokorn, Andrew Pollard, Luregn J Schlapbach, Ching-Fen Shen, Maria Tsolia, Effua Usuf, Michiel Van der Flier, Ulrich Von Both, Shunmay Yeung, Dace Zavadska, Werner Zenz, Victoria Wright, Enitan D Carrol, Myrsini Kaforou, Federico Martinon-Torres, Colin Fink, Michael Levin, Jethro Herberg, Lucas Baumard, Evangelos Bellos, Lachlan Coin, Giselle D'Souza, Dominic Habgood-Coote, Shea Hamilton, Cllive Hoggart, Sara Hourmat, Heather Jackson, Naomi Lin, Stephanie Menikou, Samuel Nichols, Ivonne Pena Paz, Oliver Powell, Ortensia Vito, Clare Wilson, Amina Abdulla, Ladan Ali, Sarah Darnell, Rikke Jorgensen, Ian Maconochie, Sobia Mustafa, Salina Persand, Ben Walsh, Molly Stevens, Nayoung Kim, Eunjung Kim, Benjamin Pierce, Julia Dudley, Vivien Richmond, Emma Tavliavini, Ching-Chuan Liu, Shih-Min Wang, Fernando Álves González, Cristina Balo Farto, Ruth Barral-Arca, María Barreiro Castro, Xabier Bello, Mirian Ben García, Sandra Carnota, Miriam Cebey-López, María José Curras-Tuala, Carlos Durán Suárez, Luisa García Vicente, Alberto Gómez-Carballa, Jose Gómez Rial, Pilar Leboráns Iglesias, Nazareth Martinón-Torres, José María Martinón Sánchez, Belén Mosquera Pérez, Jacobo Pardo-Seco, Lidia Piñeiro Rodríguez, Sara Pischedda, Sara Ray Vázquez, Carmen Rodríguez-Tenreiro, Lorenzo Redondo-Collazo, Miguel Sadiki Ora, Antonio Sallas, Sonia Serén Fernández, Cristina Serén Trasorras, Marisol Vilas Iglesias, Anda Balode, Arta Bãrdzdina, Dãrta Deksne, Dace Gardovska, Dagne Grãvele, Ilze Grope, Anija Meiere, Ieve Nokalna, Jana Pavãre, Zanda Pučuka, Katrīna Selecka, Dace Svile, Urzula Nora Urbãne, Kalifa Bojang, Syed M A Zaman, Suzanne Anderson, Anna Roca, Isatou Sarr, Momodou Saidykhan, Saffiatou Darboe, Samba Ceesay, Umberto D'alessandro, Dorine M. Borensztajn, Nienke N. Hagedoorn, Chantal Tal, Joany Zachariasse, W Dik, Christoph Aebi, Christoph Berger, Verena Wyss, Mariama Usman, Eric Giannoni, Martin Stocker, Klara M Posfay-Barbe, Ulrich Heininger, Sara Bernhard-Stirnemann, Anita Niederer-Loher, Christian Kahlert, Giancarlo Natalucci, Christa Relly, Thomas Riedel, Elizabeth Cocklin, Rebecca Jennings, Joanne Johnson, Simon Leigh, Karen Newall, Sam Romaine, Maria Tambouratzi, Antonis Marmarinos, Marietta Xagorari, Kelly Syggelou, Nikos Spyridis, Jennifer Blackmore, Rebekah Harrison, Benno Kohlmaier, Daniela S. Kohlfürst, Christoph Zurl, Alexander Binder, Susanne Hösele, Manuel Leitner, Lena Pölz, Glorija Rajic, Sebastian Bauchinger, Hinrich Baumgart, Martin Benesch, Astrid Ceolotto, Ernst Eber, Siegfried Gallisti, Gunther Gores, Harald Haidl, Almuthe Hauer, Christa Hude, Markus Keldorfer, Larissa Krenn, Heidemarie Pilch, Andreas Pfleger, Klaus Pfurtscheller, Gudrun Nordberg, Tobias Niedrist, Siegfried Rödl, Andrea Skrabl-Baumgartner, Matthias Sperl, Laura Stampfer, Volker Strenger, Holger Till, Andreas Trobisch, Sabine Löffler, Juan Emmanuel Dewez, Martin Hibberd, David Bath, Alec Miners, Elizabeth Fitchett, Catherine Wedderburn, Anne Meierford, Baptiste Leurent, Marien I. De Jonge, Koen Van Aerde, Wynand Alkema, Bryan Van den Broek, Jolein Gloerich, Alain J. Van Gool, Stefanie Henriet, Martijn Huijnen, Ria Philipsen, Esther Willems, G. P. J. M. Gerrits, M. Van Leur, J. Heidema, L. De Haan, C. J. Miedema, C. Neeleman, C. C. Obihara, G. A. Tramper-Stranders, Rama Kandasamy, Michael J. Carter, Daniel O'Connor, Sagida Bibi, Dominic F. Kelly, Meeru Gurung, Stephen Throson, Imran Ansari, David R. Murdoch, Shrijana Shrestha, Zoe Oliver, Emma Lim, Lucille Valentine, Karen Allen, Kathryn Bell, Adora Chan, Stephen Crulley, Kirsty Devine, Daniel Fabian, Sharon King, Paul McAlinden, Sam McDonald, Anne McDonell, Alisa Pickering, Evelyn Thomson, Amanda Wood, Diane Wallia, Phil Woodsford, Frances Baxter, Ashley Bell, Mathew Rhodes, Rachel Agbeko, Christine Mackerness, Bryan Baas, Lieke Kloosterhuis, Wilma Oosthoek, Tasnim Arif, Joshua Bennet, Kalvin Collings, Ilona Van der Giessen, Alex Martin, Aqeela Rashid, Emily Rowlands, Joshua Soon, Gabriella De Vries, Fabian Van der Velden, Mike Martin, Ravi Mistry, Manuela Zwerenz, Judith Buschbeck, Christoph Bidlingmaier, Vera Binder, Katharina Danhauser, Nikolaus Haas, Matthias Griese, Matthias Kappler, Eberhard Lurz, Georg Muench, Karl Reiter, Carola Schoen, Karen Brengel-Pesce, Alexandre Pachot, Marine Mommert, Katarina Vincek, Tina Plankar Srovin, Natalija Bahovec, Petra Prunk, Veronika Osterman, Tanja Avramoska, Ilse Jongerius, J. M. Van den Berg, D. Schonenberg, A. M. Barendregt, D. Pajkrt, M. Van der Kuip, A. M. Van Furth, Evelien Sprenkeler, Judith Zandstra, G. van Mierlo, J. Geissler. Funding Information: We are grateful to all patients and families that contributed towards this study. This project received funding under the European Union’s Horizon 2020 Research and Innovation program under grant agreement number 668303. PERFORM consortium activities included obtaining study funding, patient recruitment, clinical data collection and entry, assignment of patient phenotypes, processing and storage of research samples used in this analysis, and molecular pathogen testing. Publisher Copyright: © 2023 The AuthorsBACKGROUND: The PERFORM study aimed to understand causes of febrile childhood illness by comparing molecular pathogen detection with current clinical practice. METHODS: Febrile children and controls were recruited on presentation to hospital in 9 European countries 2016-2020. Each child was assigned a standardized diagnostic category based on retrospective review of local clinical and microbiological data. Subsequently, centralised molecular tests (CMTs) for 19 respiratory and 27 blood pathogens were performed. FINDINGS: Of 4611 febrile children, 643 (14%) were classified as definite bacterial infection (DB), 491 (11%) as definite viral infection (DV), and 3477 (75%) had uncertain aetiology. 1061 controls without infection were recruited. CMTs detected blood bacteria more frequently in DB than DV cases for N. meningitidis (OR: 3.37, 95% CI: 1.92-5.99), S. pneumoniae (OR: 3.89, 95% CI: 2.07-7.59), Group A streptococcus (OR 2.73, 95% CI 1.13-6.09) and E. coli (OR 2.7, 95% CI 1.02-6.71). Respiratory viruses were more common in febrile children than controls, but only influenza A (OR 0.24, 95% CI 0.11-0.46), influenza B (OR 0.12, 95% CI 0.02-0.37) and RSV (OR 0.16, 95% CI: 0.06-0.36) were less common in DB than DV cases. Of 16 blood viruses, enterovirus (OR 0.43, 95% CI 0.23-0.72) and EBV (OR 0.71, 95% CI 0.56-0.90) were detected less often in DB than DV cases. Combined local diagnostics and CMTs respectively detected blood viruses and respiratory viruses in 360 (56%) and 161 (25%) of DB cases, and virus detection ruled-out bacterial infection poorly, with predictive values of 0.64 and 0.68 respectively. INTERPRETATION: Most febrile children cannot be conclusively defined as having bacterial or viral infection when molecular tests supplement conventional approaches. Viruses are detected in most patients with bacterial infections, and the clinical value of individual pathogen detection in determining treatment is low. New approaches are needed to help determine which febrile children require antibiotics. FUNDING: EU Horizon 2020 grant 668303.Peer reviewe

Are children with prolonged fever at a higher risk for serious illness? : A prospective observational study

Funding Information: This project received funding from the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No 668303). The research was supported by the National Institute for Health Research Biomedical Research Centres at Imperial College London, Newcastle Hospitals NHS Foundation Trust and Newcastle University. RGN was funded by NIHR ACL award (ACL-2018-021-007). Funding Information: This project received funding from the European Union's Horizon 2020 research and innovation programme (Grant Agreement No 668303). The research was supported by the National Institute for Health Research Biomedical Research Centres at Imperial College London, Newcastle Hospitals NHS Foundation Trust and Newcastle University. RGN was funded by NIHR ACL award (ACL-2018- 021-007). Publisher Copyright: © 2023 Author(s) (or their employer(s)).Objectives: To describe the characteristics and clinical outcomes of children with fever ≥5 days presenting to emergency departments (EDs). Design: Prospective observational study. Setting: 12 European EDs. Patients: Consecutive febrile children 0.90, but were observed infrequently (range: 0.4%-17%). Absence of warning signs was not sufficiently reliable to rule out SBI (sensitivity 0.92 (95% CI 0.87-0.95), negative likelihood ratio (LR) 0.34 (0.22-0.54)). CRP <20 mg/L was useful for ruling out SBI (negative LR 0.16 (0.11-0.24)). There were 66 cases (1.7%) of non-infectious serious illnesses, including 21 cases of Kawasaki disease (0.6%), 28 inflammatory conditions (0.7%) and 4 malignancies. Conclusion: Children with prolonged fever have a higher risk of SBI, warranting a careful clinical assessment and diagnostic workup. Warning signs of SBI occurred infrequently but, if present, increased the likelihood of SBI. Although rare, clinicians should consider important non-infectious causes of prolonged fever.Peer reviewe

Diagnosis of Multisystem Inflammatory Syndrome in Children by a Whole-Blood Transcriptional Signature

Funding Information: Financial support. This work was supported by the European Union’s Horizon 2020 Program under grants (848196 DIAMONDS, 668303 PERFORM, 279185 EUCLIDS, Prof Levin), by the Imperial Biomedical Research Centre (BRC) of the National Institute for Health Research (NIHR), grants (206508/Z/17/Z and MRF-160-0008-ELP-KAFO-C0801 to Dr Kaforou) from the Wellcome Trust and the Medical Research Foundation, a grant (215214/Z/19/Z to Dr Jackson) from the Wellcome Trust, a grant (R61HD105590-01 PreVAIL kIds to Dr. Burns) from the National Institutes of Health, and grants (WDPI_G28062 and WDPI_P89720 to Drs Herberg and Georgiou) from the Community Jameel Imperial College COVID-19 Excellence Fund and the Rosetrees Trust. This work has been supported by the Imperial Confidence in Concept Scheme, funded by MRC Confidence in Concept, Wellcome Trust Institutional Strategic Support Fund, NIHR Imperial BRC, and Rosetrees Trust (to Rodriguez-Manzano and Kaforou). Publisher Copyright: © 2023 The Author(s). Published by Oxford University Press on behalf of The Journal of the Pediatric Infectious Diseases Society.Background: To identify a diagnostic blood transcriptomic signature that distinguishes multisystem inflammatory syndrome in children (MIS-C) from Kawasaki disease (KD), bacterial infections, and viral infections. Methods: Children presenting with MIS-C to participating hospitals in the United Kingdom and the European Union between April 2020 and April 2021 were prospectively recruited. Whole-blood RNA Sequencing was performed, contrasting the transcriptomes of children with MIS-C (n = 38) to those from children with KD (n = 136), definite bacterial (DB; n = 188) and viral infections (DV; n = 138). Genes significantly differentially expressed (SDE) between MIS-C and comparator groups were identified. Feature selection was used to identify genes that optimally distinguish MIS-C from other diseases, which were subsequently translated into RT-qPCR assays and evaluated in an independent validation set comprising MIS-C (n = 37), KD (n = 19), DB (n = 56), DV (n = 43), and COVID-19 (n = 39). Results: In the discovery set, 5696 genes were SDE between MIS-C and combined comparator disease groups. Five genes were identified as potential MIS-C diagnostic biomarkers (HSPBAP1, VPS37C, TGFB1, MX2, and TRBV11-2), achieving an AUC of 96.8% (95% CI: 94.6%-98.9%) in the discovery set, and were translated into RT-qPCR assays. The RT-qPCR 5-gene signature achieved an AUC of 93.2% (95% CI: 88.3%-97.7%) in the independent validation set when distinguishing MIS-C from KD, DB, and DV. Conclusions: MIS-C can be distinguished from KD, DB, and DV groups using a 5-gene blood RNA expression signature. The small number of genes in the signature and good performance in both discovery and validation sets should enable the development of a diagnostic test for MIS-C.Peer reviewe

European study confirms the combination of fever and petechial rash as an important warning sign for childhood sepsis and meningitis

Funding Information: This project received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 668303. The research was supported by the National Institute for Health Research Biomedical Research Centres at Imperial College London, Newcastle Hospitals NHS Foundation Trust and Newcastle University. Publisher Copyright: © 2023 The Authors. Acta Paediatrica published by John Wiley & Sons Ltd on behalf of Foundation Acta Paediatrica.AIM: This study investigated febrile children with petechial rashes who presented to European emergency departments (EDs) and investigated the role that mechanical causes played in diagnoses. METHODS: Consecutive patients with fever presenting to EDs in 11 European emergency departments in 2017-2018 were enrolled. The cause and focus of infection were identified and a detailed analysis was performed on children with petechial rashes. The results are presented as odds ratios (OR) with 95% confidence intervals (CI). RESULTS: We found that 453/34,010 (1.3%) febrile children had petechial rashes. The focus of the infection included sepsis (10/453, 2.2%) and meningitis (14/453, 3.1%). Children with a petechial rash were more likely than other febrile children to have sepsis or meningitis (OR 8.5, 95% CI 5.3-13.1) and bacterial infections (OR 1.4, 95% CI 1.0-1.8) as well as need for immediate life-saving interventions (OR 6.6, 95% CI 4.4-9.5) and intensive care unit admissions (OR 6.5, 95% CI 3.0-12.5). CONCLUSION: The combination of fever and petechial rash is still an important warning sign for childhood sepsis and meningitis. Ruling out coughing and/or vomiting was insufficient to safely identify low-risk patients.publishersversionPeer reviewe

Fever in high-risk paediatric patients presenting to European emergency departments : the perform experience

publishersversionPeer reviewe

Impact of infection on proteome-wide glycosylation revealed by distinct signatures for bacterial and viral pathogens

Funding Information: This research, part of the PERFORM project, has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 668303 . The samples collected previously were funded by: the European Seventh Framework Programme for Research and Technological Development ( FP7 ) under EUCLIDS Grant Agreement No. 279185 . Funding Information: This research, part of the PERFORM project, has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No. 668303. The samples collected previously were funded by: the European Seventh Framework Programme for Research and Technological Development (FP7) under EUCLIDS Grant Agreement No. 279185. We would like to thank all the patients and the healthy controls for donating their blood for the EUCLIDS, IRIS, and Westra studies. We would like to thank the Radboud Consortium for Glycoscience for their advice for data interpretation. We also thank the PERFORM consortium (see supplemental material for all participants) for their collaboration and fruitful discussions. Conceptualization, E.W. H.W. and M.J.; Methodology, E.W. M.D. H.W. and M.J.; Investigation, E.W.; Software, A.S. and H.W.; Formal Analysis, E.W. and H.W.; Visualization, E.W. and H.W.; Resources, M.F. L.H. N.K. R.P. M.K. V.W. J.H. and F.M.; Writing – Original Draft, E.W. and M.J.; Writing – Review & Editing, E.W. J.G. A.S. M.F. L.H. N.K. R.P. M.D. M.K. V.W. J.H. F.M. M.L. R.G. A.G. D.L. H.W. and M.J.; Funding Acquisition, M.J. R.G. and M.L.; Supervision, H.W. D.L. and M.J. The authors declare no competing interests. We support inclusive, diverse, and equitable conduct of research. Publisher Copyright: © 2023 The Author(s)Mechanisms of infection and pathogenesis have predominantly been studied based on differential gene or protein expression. Less is known about posttranslational modifications, which are essential for protein functional diversity. We applied an innovative glycoproteomics method to study the systemic proteome-wide glycosylation in response to infection. The protein site-specific glycosylation was characterized in plasma derived from well-defined controls and patients. We found 3862 unique features, of which we identified 463 distinct intact glycopeptides, that could be mapped to more than 30 different proteins. Statistical analyses were used to derive a glycopeptide signature that enabled significant differentiation between patients with a bacterial or viral infection. Furthermore, supported by a machine learning algorithm, we demonstrated the ability to identify the causative pathogens based on the distinctive host blood plasma glycopeptide signatures. These results illustrate that glycoproteomics holds enormous potential as an innovative approach to improve the interpretation of relevant biological changes in response to infection.Peer reviewe

Genomic investigations of unexplained acute hepatitis in children

Funding Information: UKHSA funded the metagenomics and HAdV sequencing. We thank A. Nathwani for helpful discussions. We acknowledge the considerable contribution from the GOSH microbiology laboratory. We thank the medical students who contributed to the DIAMOND consortium. All research at GOSH and UCL GOSH Institute of Child Health is made possible by the NIHR GOSH Biomedical Research Centre. The views expressed are those of the authors and not necessarily those of the NHS, the National Institute for Health Research (NIHR), the UKRI or the Department of Health and Social Care. The work was part funded by the NIHR Blood and Transplant Research Unit in Genomics to Enhance Microbiology Screening (GEMS), the National Institute for Health and Care Research (CO-CIN-01) or jointly by NIHR and UK Research and Innovation (CV220-169, MC_PC_19059). S. Morfopoulou is funded by a W.T. Henry Wellcome fellowship (206478/Z/17/Z). S.B. and O.E.T.M. are funded by the NIHR Blood and Transplant Research Unit (GEMS). M.M.M. and M.L. are supported in part by the NIHR Biomedical Research Centre of Imperial College NHS Trust. J.B. receives NIHR Senior Investigator Funding. M.N. and J.B. are supported by the Wellcome Trust (207511/Z/17/Z and 203268/Z/16/Z). M.N., J.B. and G.P. are supported by the NIHR University College London Hospitals Biomedical Research Centre. P. Simmonds is supported by the NIHR (NIHR203338). T.S.J. is grateful for funding from the Brain Tumour Charity, Children with Cancer UK, GOSH Children’s Charity, Olivia Hodson Cancer Fund, Cancer Research UK and the NIHR. DIAMONDS is funded by the European Union (Horizon 2020; grant 848196). PERFORM was funded by the European Union (Horizon 2020; grant 668303). Publisher Copyright: © 2023, The Author(s).Since its first identification in Scotland, over 1,000 cases of unexplained paediatric hepatitis in children have been reported worldwide, including 278 cases in the UK1. Here we report an investigation of 38 cases, 66 age-matched immunocompetent controls and 21 immunocompromised comparator participants, using a combination of genomic, transcriptomic, proteomic and immunohistochemical methods. We detected high levels of adeno-associated virus 2 (AAV2) DNA in the liver, blood, plasma or stool from 27 of 28 cases. We found low levels of adenovirus (HAdV) and human herpesvirus 6B (HHV-6B) in 23 of 31 and 16 of 23, respectively, of the cases tested. By contrast, AAV2 was infrequently detected and at low titre in the blood or the liver from control children with HAdV, even when profoundly immunosuppressed. AAV2, HAdV and HHV-6 phylogeny excluded the emergence of novel strains in cases. Histological analyses of explanted livers showed enrichment for T cells and B lineage cells. Proteomic comparison of liver tissue from cases and healthy controls identified increased expression of HLA class 2, immunoglobulin variable regions and complement proteins. HAdV and AAV2 proteins were not detected in the livers. Instead, we identified AAV2 DNA complexes reflecting both HAdV-mediated and HHV-6B-mediated replication. We hypothesize that high levels of abnormal AAV2 replication products aided by HAdV and, in severe cases, HHV-6B may have triggered immune-mediated hepatic disease in genetically and immunologically predisposed children.publishersversionPeer reviewe

Rapid Viral Testing and Antibiotic Prescription in Febrile Children with Respiratory Symptoms Visiting Emergency Departments in Europe

Funding Information: This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 668303 and No. 848196. The Research was supported by the National Institute for Health Research Biomedical Research Centres at Imperial College London, Newcastle Hospitals NHS Foundation Trust and Newcastle University. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health. For the remaining authors no sources of funding were declared. Publisher Copyright: Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.Background. Inappropriate antibiotic prescribing often occurs in children with self-limiting respiratory tract infections, contributing to antimicrobial resistance. It has been suggested that rapid viral testing can reduce inappropriate antibiotic prescribing. We aimed to assess the association between rapid viral testing at the Emergency Department (ED) and antibiotic prescription in febrile children. Methods. This study is part of the MOFICHE study, which is an observational multicenter study including routine data of febrile children (0-18 years) attending 12 European EDs. In children with respiratory symptoms visiting 6 EDs equipped with rapid viral testing, we performed multivariable logistic regression analysis regarding rapid viral testing and antibiotic prescription adjusted for patient characteristics, disease severity, diagnostic tests, focus of infection, admission, and ED. Results. A rapid viral test was performed in 1061 children (8%) and not performed in 11,463 children. Rapid viral test usage was not associated with antibiotic prescription (aOR 0.9, 95% CI: 0.8-1.1). A positive rapid viral test was associated with less antibiotic prescription compared with children without test performed (aOR 0.6, 95% CI: 0.5-0.8), which remained significant after adjustment for CRP and chest radiograph result. Twenty percent of the positively tested children received antibiotics. A negative rapid viral test was not associated with antibiotic prescription (aOR 1.2, 95% CI: 1.0-1.4). Conclusions. Rapid viral test usage did not reduce overall antibiotic prescription, whereas a positive rapid viral test did reduce antibiotic prescription at the ED. Implementation of rapid viral testing in routine emergency care and compliance to the rapid viral test outcome will reduce inappropriate antibiotic prescribing at the ED.publishersversionPeer reviewe

A multi-platform approach to identify a blood-based host protein signature for distinguishing between bacterial and viral infections in febrile children (PERFORM) : a multi-cohort machine learning study

Copyright © 2023 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.BACKGROUND: Differentiating between self-resolving viral infections and bacterial infections in children who are febrile is a common challenge, causing difficulties in identifying which individuals require antibiotics. Studying the host response to infection can provide useful insights and can lead to the identification of biomarkers of infection with diagnostic potential. This study aimed to identify host protein biomarkers for future development into an accurate, rapid point-of-care test that can distinguish between bacterial and viral infections, by recruiting children presenting to health-care settings with fever or a history of fever in the previous 72 h. METHODS: In this multi-cohort machine learning study, patient data were taken from EUCLIDS, the Swiss Pediatric Sepsis study, the GENDRES study, and the PERFORM study, which were all based in Europe. We generated three high-dimensional proteomic datasets (SomaScan and two via liquid chromatography tandem mass spectrometry, referred to as MS-A and MS-B) using targeted and untargeted platforms (SomaScan and liquid chromatography mass spectrometry). Protein biomarkers were then shortlisted using differential abundance analysis, feature selection using forward selection-partial least squares (FS-PLS; 100 iterations), along with a literature search. Identified proteins were tested with Luminex and ELISA and iterative FS-PLS was done again (25 iterations) on the Luminex results alone, and the Luminex and ELISA results together. A sparse protein signature for distinguishing between bacterial and viral infections was identified from the selected proteins. The performance of this signature was finally tested using Luminex assays and by calculating disease risk scores. FINDINGS: 376 children provided serum or plasma samples for use in the discovery of protein biomarkers. 79 serum samples were collected for the generation of the SomaScan dataset, 147 plasma samples for the MS-A dataset, and 150 plasma samples for the MS-B dataset. Differential abundance analysis, and the first round of feature selection using FS-PLS identified 35 protein biomarker candidates, of which 13 had commercial ELISA or Luminex tests available. 16 proteins with ELISA or Luminex tests available were identified by literature review. Further evaluation via Luminex and ELISA and the second round of feature selection using FS-PLS revealed a six-protein signature: three of the included proteins are elevated in bacterial infections (SELE, NGAL, and IFN-γ), and three are elevated in viral infections (IL18, NCAM1, and LG3BP). Performance testing of the signature using Luminex assays revealed area under the receiver operating characteristic curve values between 89·4% and 93·6%. INTERPRETATION: This study has led to the identification of a protein signature that could be ultimately developed into a blood-based point-of-care diagnostic test for rapidly diagnosing bacterial and viral infections in febrile children. Such a test has the potential to greatly improve care of children who are febrile, ensuring that the correct individuals receive antibiotics. FUNDING: European Union's Horizon 2020 research and innovation programme, the European Union's Seventh Framework Programme (EUCLIDS), Imperial Biomedical Research Centre of the National Institute for Health Research, the Wellcome Trust and Medical Research Foundation, Instituto de Salud Carlos III, Consorcio Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, Grupos de Refeencia Competitiva, Swiss State Secretariat for Education, Research and Innovation.Peer reviewe