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Cui J, Jia W, Li P, Zhang X, Li Z, Song C. Influenza a H1N1 infection complicated with encephalopathy and acute pancreatitis: a case report. BMC Pediatr 2024; 24:156. [PMID: 38443804 PMCID: PMC10916310 DOI: 10.1186/s12887-024-04651-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/16/2024] [Indexed: 03/07/2024] Open
Abstract
This paper reports a case of influenza complicated with influenza associated encephalopathy complicated with acute pancreatitis. This kind of disease is relatively rare, we hope to draw people's attention to it in order to improve early detection and prognosis.
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Affiliation(s)
- Junhao Cui
- Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, No. 1, University South Road, Erqi District, Zhengzhou, Henan Province, 450000, China
| | - Wanyu Jia
- Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, No. 1, University South Road, Erqi District, Zhengzhou, Henan Province, 450000, China
| | - Peng Li
- Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, No. 1, University South Road, Erqi District, Zhengzhou, Henan Province, 450000, China
| | - Xue Zhang
- Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, No. 1, University South Road, Erqi District, Zhengzhou, Henan Province, 450000, China
| | - Zheng Li
- Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100000, China
| | - Chunlan Song
- Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, No. 1, University South Road, Erqi District, Zhengzhou, Henan Province, 450000, China.
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Xu Z, Wang H, Jiang S, Teng J, Zhou D, Chen Z, Wen C, Xu Z. Brain Pathology in COVID-19: Clinical Manifestations and Potential Mechanisms. Neurosci Bull 2024; 40:383-400. [PMID: 37715924 PMCID: PMC10912108 DOI: 10.1007/s12264-023-01110-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 05/25/2023] [Indexed: 09/18/2023] Open
Abstract
Neurological manifestations of coronavirus disease 2019 (COVID-19) are less noticeable than the respiratory symptoms, but they may be associated with disability and mortality in COVID-19. Even though Omicron caused less severe disease than Delta, the incidence of neurological manifestations is similar. More than 30% of patients experienced "brain fog", delirium, stroke, and cognitive impairment, and over half of these patients presented abnormal neuroimaging outcomes. In this review, we summarize current advances in the clinical findings of neurological manifestations in COVID-19 patients and compare them with those in patients with influenza infection. We also illustrate the structure and cellular invasion mechanisms of SARS-CoV-2 and describe the pathway for central SARS-CoV-2 invasion. In addition, we discuss direct damage and other pathological conditions caused by SARS-CoV-2, such as an aberrant interferon response, cytokine storm, lymphopenia, and hypercoagulation, to provide treatment ideas. This review may offer new insights into preventing or treating brain damage in COVID-19.
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Affiliation(s)
- Zhixing Xu
- First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Hui Wang
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Siya Jiang
- Second School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Jiao Teng
- Affiliated Lin'an People's Hospital of Hangzhou Medical College, First People's Hospital of Hangzhou Lin'an District, Lin'an, Hangzhou, 311300, China
| | - Dongxu Zhou
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Zhong Chen
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Chengping Wen
- Laboratory of Rheumatology and Institute of TCM Clinical Basic Medicine, College of Basic Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
| | - Zhenghao Xu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
- Laboratory of Rheumatology and Institute of TCM Clinical Basic Medicine, College of Basic Medical Science, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
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Davé VA, Klein RS. The multitaskers of the brain: Glial responses to viral infections and associated post-infectious neurologic sequelae. Glia 2023; 71:803-818. [PMID: 36334073 PMCID: PMC9931640 DOI: 10.1002/glia.24294] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 10/19/2022] [Accepted: 10/21/2022] [Indexed: 11/08/2022]
Abstract
Many viral infections cause acute and chronic neurologic diseases which can lead to degeneration of cortical functions. While neurotropic viruses that gain access to the central nervous system (CNS) may induce brain injury directly via infection of neurons or their supporting cells, they also alter brain function via indirect neuroimmune mechanisms that may disrupt the blood-brain barrier (BBB), eliminate synapses, and generate neurotoxic astrocytes and microglia that prevent recovery of neuronal circuits. Non-neuroinvasive, neurovirulent viruses may also trigger aberrant responses in glial cells, including those that interfere with motor and sensory behaviors, encoding of memories and executive function. Increasing evidence from human and animal studies indicate that neuroprotective antiviral responses that amplify levels of innate immune molecules dysregulate normal neuroimmune processes, even in the absence of neuroinvasion, which may persist after virus is cleared. In this review, we discuss how select emerging and re-emerging RNA viruses induce neuroimmunologic responses that lead to dysfunction of higher order processes including visuospatial recognition, learning and memory, and motor control. Identifying therapeutic targets that return the neuroimmune system to homeostasis is critical for preventing virus-induced neurodegenerative disorders.
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Affiliation(s)
- Veronica A Davé
- Center for Neuroimmunology & Neuroinfectious Diseases, Departments of Medicine, Pathology & Immunology, Neurosciences, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Robyn S Klein
- Center for Neuroimmunology & Neuroinfectious Diseases, Departments of Medicine, Pathology & Immunology, Neurosciences, Washington University School of Medicine, St. Louis, Missouri, USA
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4
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Seasonal Trends in the Prevalence and Incidence of Viral Encephalitis in Korea (2015-2019). J Clin Med 2023; 12:jcm12052003. [PMID: 36902789 PMCID: PMC10003849 DOI: 10.3390/jcm12052003] [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: 02/16/2023] [Revised: 02/21/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Viral infections are a common cause of encephalitis. This study investigated the relationship between the incidence of encephalitis and that of respiratory and enteric viral infections in all age groups from 2015 to 2019, using the Health Insurance Review and Assessment (HIRA) Open Access Big Data Platform. We identified monthly incidence patterns and seasonal trends using the autoregressive integrated moving average (ARIMA). The Granger causality test was used to analyze correlations between encephalitis incidence and the positive detection rate (PDR) at 1-month intervals. A total of 42,775 patients were diagnosed with encephalitis during the study period. The incidence of encephalitis was highest in the winter (26.8%). The PDRs for respiratory syncytial virus (HRSV) and coronavirus (HCoV) were associated with the trend in encephalitis diagnosis in all age groups, with a 1-month lag period. In addition, an association with norovirus was observed in patients aged over 20 years, and with influenza virus (IFV) in patients aged over 60 years. This study found that HRSV, HCoV, IFV, and norovirus tended to precede encephalitis by 1 month. Further research is required to confirm the association between these viruses and encephalitis.
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Jantarabenjakul W, Paprad T, Paprad T, Anugulruengkitt S, Pancharoen C, Puthanakit T, Chomtho K. Neurological complications associated with influenza in hospitalized children. Influenza Other Respir Viruses 2022; 17:e13075. [PMID: 36514185 PMCID: PMC9835412 DOI: 10.1111/irv.13075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 11/10/2022] [Accepted: 11/15/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Influenza is a known respiratory and potential neurotropic virus. This study aimed to determine the prevalence and outcomes of influenza-related neurological complications among hospitalized children. METHODS All medical records of hospitalized children aged <18 years old diagnosed with influenza at a tertiary care hospital in Bangkok were retrospectively reviewed. Influenza infection was confirmed by rapid antigen or reverse transcription polymerase chain reaction tests. Neurological characteristics and clinical outcomes were analyzed using the Pediatric Cerebral Performance Category Scale. RESULTS From 2013 to 2018, 397 hospitalized children with a median age of 3.7 years (interquartile range [IQR]: 1.6-6.9) were included. The prevalence of neurological complications, including seizure or acute encephalopathy, was 16.9% (95% confidence interval [CI]: 13.3-20.9). Influenza A and B were identified in 73.1% and 26.9% of the patients, respectively. Among 39 (58.2%) acute symptomatic seizure cases, 25 (37.3%) children had simple febrile seizures, 7 (10.4%) had repetitive seizures, and 7 (10.4%) had provoked seizures with pre-existing epilepsy. For 28 (41.8%) encephalopathy cases, the clinical courses were benign in 20 (29.9%) cases and severe in 8 (11.9%) cases. Ten (14.9%) children needed intensive care monitoring, and 62 (93.5%) fully recovered to their baselines at hospital discharge. Predisposing factors to the neurological complications included a history of febrile seizure (adjusted odds ratio [aOR]: 20.3; 95% CI: 6.6-63.0), pre-existing epilepsy (aOR: 3.6; 95% CI: 1.3-10.2), and a history of other neurological disorders (aOR: 3.5; 95% CI: 1.2-10.2). CONCLUSIONS One fifth of hospitalized children with influenza had neurological complications with a favorable outcome. Children with pre-existing neurological conditions were at higher risk for developing neurological complications.
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Affiliation(s)
- Watsamon Jantarabenjakul
- Division of Infectious Diseases, Department of Pediatrics, Faculty of MedicineChulalongkorn UniversityBangkokThailand,Center of Excellence for Pediatric Infectious Diseases and Vaccines, Faculty of MedicineChulalongkorn UniversityBangkokThailand,Thai Red Cross Emerging Infectious Diseases Clinical CenterKing Chulalongkorn Memorial HospitalBangkokThailand
| | - Tanitnun Paprad
- Division of Neurological Diseases, Department of Pediatrics, Faculty of MedicineChulalongkorn UniversityBangkokThailand
| | - Tunchanok Paprad
- Division of Diagnostic Radiology, Department of Radiology, Faculty of MedicineChulalongkorn University, King Chulalongkorn Memorial HospitalBangkokThailand
| | - Suvaporn Anugulruengkitt
- Division of Infectious Diseases, Department of Pediatrics, Faculty of MedicineChulalongkorn UniversityBangkokThailand,Center of Excellence for Pediatric Infectious Diseases and Vaccines, Faculty of MedicineChulalongkorn UniversityBangkokThailand
| | - Chitsanu Pancharoen
- Division of Infectious Diseases, Department of Pediatrics, Faculty of MedicineChulalongkorn UniversityBangkokThailand,Center of Excellence for Pediatric Infectious Diseases and Vaccines, Faculty of MedicineChulalongkorn UniversityBangkokThailand
| | - Thanyawee Puthanakit
- Division of Infectious Diseases, Department of Pediatrics, Faculty of MedicineChulalongkorn UniversityBangkokThailand,Center of Excellence for Pediatric Infectious Diseases and Vaccines, Faculty of MedicineChulalongkorn UniversityBangkokThailand
| | - Krisnachai Chomtho
- Division of Neurological Diseases, Department of Pediatrics, Faculty of MedicineChulalongkorn UniversityBangkokThailand
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Frankl S, Coffin SE, Harrison JB, Swami SK, McGuire JL. Influenza-Associated Neurologic Complications in Hospitalized Children. J Pediatr 2021; 239:24-31.e1. [PMID: 34293371 PMCID: PMC9753480 DOI: 10.1016/j.jpeds.2021.07.039] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To define the incidence and characteristics of influenza-associated neurologic complications in a cohort of children hospitalized at a tertiary care pediatric hospital with laboratory-confirmed influenza and to identify associated clinical, epidemiologic, and virologic factors. STUDY DESIGN This was an historical cohort study of children aged 0.5-18.0 years old hospitalized between 2010 and 2017 with laboratory-confirmed influenza. Children with immune compromise or a positive test due to recent receipt of live virus vaccine or recently resolved illness were excluded. Influenza-associated neurologic complications were defined as new-onset neurologic signs/symptoms during acute influenza illness without another clear etiology. RESULTS At least 1 influenza-associated neurologic complication was identified in 10.8% (95% CI 9.1-12.6%, n = 131 of 1217) of hospitalizations with laboratory-confirmed influenza. Seizures (n = 97) and encephalopathy (n = 44) were the most commonly identified influenza-associated neurologic complications, although an additional 20 hospitalizations had other influenza-associated neurologic complications. Hospitalizations with influenza-associated neurologic complications were similar in age and influenza type (A/B) to those without. Children with a pre-existing neurologic diagnosis (n = 326) had a greater proportion of influenza-associated neurologic complications compared with those without (22.7% vs 6.4%, P < .001). Presence of a pre-existing neurologic diagnosis (aOR 4.6, P < .001), lack of seasonal influenza vaccination (aOR 1.6, P = .020), and age ≤5 years (aOR 1.6, P = .017) were independently associated with influenza-associated neurologic complications. CONCLUSIONS Influenza-associated neurologic complications are common in children hospitalized with influenza, particularly those with pre-existing neurologic diagnoses. A better understanding of the epidemiology and factors associated with influenza-associated neurologic complications will direct future investigation into potential neuropathologic mechanisms and mitigating strategies. Vaccination is recommended and may help prevent influenza-associated neurologic complications in children.
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Affiliation(s)
- Sarah Frankl
- Division of Neurology, The Children’s Hospital of Philadelphia
| | - Susan E Coffin
- Division of Infectious Disease, The Children’s Hospital of Philadelphia,Department of Pediatrics, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | | | - Sanjeev K Swami
- Division of Infectious Disease, The Children’s Hospital of Philadelphia,Department of Pediatrics, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Jennifer L McGuire
- Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, PA; Department of Neurology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA; Department of Pediatrics, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA.
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Ali Awan H, Najmuddin Diwan M, Aamir A, Ali M, Di Giannantonio M, Ullah I, Shoib S, De Berardis D. SARS-CoV-2 and the Brain: What Do We Know about the Causality of 'Cognitive COVID? J Clin Med 2021; 10:3441. [PMID: 34362224 PMCID: PMC8347421 DOI: 10.3390/jcm10153441] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/23/2021] [Accepted: 07/28/2021] [Indexed: 12/22/2022] Open
Abstract
The second year of the COVID-19 (coronavirus disease) pandemic has seen the need to identify and assess the long-term consequences of a SARS-CoV-2 infection on an individual's overall wellbeing, including adequate cognitive functioning. 'Cognitive COVID' is an informal term coined to interchangeably refer to acute changes in cognition during COVID-19 and/or cognitive sequelae with various deficits following the infection. These may manifest as altered levels of consciousness, encephalopathy-like symptoms, delirium, and loss of various memory domains. Dysexecutive syndrome is a peculiar manifestation of 'Cognitive COVID' as well. In the previous major outbreaks of viruses like SARS-CoV, MERS-CoV and Influenza. There have been attempts to understand the underlying mechanisms describing the causality of similar symptoms following SARS-CoV-2 infection. This review, therefore, is attempting to highlight the current understanding of the various direct and indirect mechanisms, focusing on the role of neurotropism of SARS-CoV-2, the general pro-inflammatory state, and the pandemic-associated psychosocial stressors in the causality of 'Cognitive COVID.' Neurotropism is associated with various mechanisms including retrograde neuronal transmission via olfactory pathway, a general hematogenous spread, and the virus using immune cells as vectors. The high amounts of inflammation caused by COVID-19, compounded with potential intubation, are associated with a deleterious effect on the cognition as well. Finally, the pandemic's unique psychosocial impact has raised alarm due to its possible effect on cognition. Furthermore, with surfacing reports of post-COVID-vaccination cognitive impairments after vaccines containing mRNA encoding for spike glycoprotein of SARS-CoV-2, we hypothesize their causality and ways to mitigate the risk. The potential impact on the quality of life of an individual and the fact that even a minor proportion of COVID-19 cases developing cognitive impairment could be a significant burden on already overwhelmed healthcare systems across the world make it vital to gather further evidence regarding the prevalence, presentation, correlations, and causality of these events and reevaluate our approach to accommodate early identification, management, and rehabilitation of patients exhibiting cognitive symptoms.
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Affiliation(s)
- Hashir Ali Awan
- Department of Internal Medicine, Dow Medical College, Karachi 74200, Pakistan; (H.A.A.); (M.N.D.); (A.A.); (M.A.)
| | - Mufaddal Najmuddin Diwan
- Department of Internal Medicine, Dow Medical College, Karachi 74200, Pakistan; (H.A.A.); (M.N.D.); (A.A.); (M.A.)
| | - Alifiya Aamir
- Department of Internal Medicine, Dow Medical College, Karachi 74200, Pakistan; (H.A.A.); (M.N.D.); (A.A.); (M.A.)
| | - Muneeza Ali
- Department of Internal Medicine, Dow Medical College, Karachi 74200, Pakistan; (H.A.A.); (M.N.D.); (A.A.); (M.A.)
| | - Massimo Di Giannantonio
- Department of Neurosciences and Imaging, Chair of Psychiatry, University “G. D’Annunzio”, 66100 Chieti, Italy;
| | - Irfan Ullah
- Department of Internal Medicine, Kabir Medical College, Gandhara University, Peshawar 25000, Pakistan;
| | - Sheikh Shoib
- Department of Internal Medicine, Jawahar Lal Nehru Memorial Hospital, Srinagar 190003, India;
| | - Domenico De Berardis
- Department of Neurosciences and Imaging, Chair of Psychiatry, University “G. D’Annunzio”, 66100 Chieti, Italy;
- Department of Internal Medicine, Jawahar Lal Nehru Memorial Hospital, Srinagar 190003, India;
- NHS, National Health Service, Department of Mental Health, Psychiatric Service for Diagnosis and Treatment, Hospital “G. Mazzini,” ASL 4, 64100 Teramo, Italy
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Chhatbar C, Prinz M. The roles of microglia in viral encephalitis: from sensome to therapeutic targeting. Cell Mol Immunol 2021; 18:250-258. [PMID: 33437050 PMCID: PMC7802409 DOI: 10.1038/s41423-020-00620-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 12/08/2020] [Indexed: 01/31/2023] Open
Abstract
Viral encephalitis is a devastating disease with high mortality, and survivors often suffer from severe neurological complications. Microglia are innate immune cells of the central nervous system (CNS) parenchyma whose turnover is reliant on local proliferation. Microglia express a diverse range of proteins, which allows them to continuously sense the environment and quickly react to changes. Under inflammatory conditions such as CNS viral infection, microglia promote innate and adaptive immune responses to protect the host. However, during viral infection, a dysregulated microglia-T-cell interplay may result in altered phagocytosis of neuronal synapses by microglia that causes neurocognitive impairment. In this review, we summarize the current knowledge on the role of microglia in viral encephalitis, propose questions to be answered in the future and suggest possible therapeutic targets.
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Affiliation(s)
- Chintan Chhatbar
- grid.5963.9Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany
| | - Marco Prinz
- grid.5963.9Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany ,grid.5963.9Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany ,grid.5963.9Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
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9
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Yu MKL, Leung CPP, Wong WHS, Ho ACC, Chiu ATG, Zhi HH, Chan GCF, Chan SHS. Clinical Spectrum and Burden of Influenza-Associated Neurological Complications in Hospitalised Paediatric Patients. Front Pediatr 2021; 9:752816. [PMID: 35127584 PMCID: PMC8811455 DOI: 10.3389/fped.2021.752816] [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: 08/16/2021] [Accepted: 12/27/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Influenza is one of the most common causes of acute respiratory tract infections around the world. Influenza viruses can cause seasonal epidemics. There remains limited information on the impact of both seasonal influenza A and influenza B related hospitalisations from neurological complications in paediatric populations in Asia. OBJECTIVES To examine both the clinical spectrum and healthcare burden of influenza-associated neurological complications (IANCs) within the paediatric population of Hong Kong. METHODS We conducted a population-based retrospective study to identify all paediatric patients (<18 years) admitted to a public hospital in Hong Kong with a confirmed influenza A or B infection between 2014 and 2018 using the Clinical Data Analysis and Reporting System of the Hospital Authority. The clinical spectrum of the paediatric patients with IANCs was studied. The clinical burden of paediatric influenza patients with IANCs were compared to paediatric influenza patients without neurological complications. RESULTS A total of 28,016 children admitted to the paediatric wards diagnosed to have influenza A or B infection were identified, accounting for 5.7% (28,016/489,955) of total paediatric admissions. 67.3% had influenza A and 32.7% had influenza B, and 8.9% had IANCs. The mean annual incidence of IANCs in children was 57 per 100,000 population. The spectrum of IANCs in our paediatric patients included febrile seizures (80.6%), myositis (11.4%), seizures with fever (5.4%), influenza-associated encephalitis/encephalopathy (IAE) (2.6%) and rarely Guillain-Barré syndrome (0.04%). Most paediatric patients with IANCs (85.5%) presented at a young age of <6 years. Paediatric patients with IANCs had significant longer hospital stays (p < 0.001), higher percentages of mechanical ventilation use (p < 0.05) and PICU admissions (p < 0.001), and higher mortality rates (p < 0.001) compared to those without neurological complications. Amongst those with IANCs, IAE was the sole cause of all seven reported mortalities. CONCLUSIONS Seasonal influenza A & B is a common cause of hospitalisation for paediatric patients in Hong Kong. We found neurological complications from influenza A and B caused a significantly higher clinical burden compared to those without neurological complications. Children in younger age groups (<6 years old) are at highest risk and thus increasing vaccination coverage to this age group is recommended.
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Affiliation(s)
- Michael Kwan Leung Yu
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Cherry Pui Pik Leung
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Wilfred Hing Sang Wong
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Alvin Chi Chung Ho
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong SAR, China
| | - Annie Ting Gee Chiu
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong SAR, China
| | - Helen Hui Zhi
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Godfrey Chi Fung Chan
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Sophelia Hoi Shan Chan
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.,Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong SAR, China
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Takia L, Patra N, Nallasamy K, Saini L, Suthar R, Angurana SK, Jayashree M. Acute Necrotizing Encephalopathy of Childhood with H1N1 Infection. J Pediatr Intensive Care 2020; 9:222-224. [PMID: 32685254 DOI: 10.1055/s-0040-1705182] [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: 11/21/2019] [Accepted: 01/31/2020] [Indexed: 10/24/2022] Open
Abstract
Acute necrotizing encephalopathy of childhood (ANEC) is an uncommon and fulminant complication of seasonal influenza infection associated with high mortality and poor neurological outcome. We report a 4.5-year-old female who had pneumonia, ANEC, and raised intracranial pressure (ICP) with polymerase chain reaction proven H1N1 infection. Management included mechanical ventilation, invasive monitoring and control of ICP, oseltamivir, methylprednisolone, and supportive care in pediatric intensive care unit. She survived with poor neurological status at discharge.
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Affiliation(s)
- Lalit Takia
- Division of Pediatric Critical Care, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Nilamani Patra
- Division of Pediatric Critical Care, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Karthi Nallasamy
- Division of Pediatric Critical Care, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Lokesh Saini
- Division of Pediatric Neurology, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Renu Suthar
- Division of Pediatric Neurology, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Suresh K Angurana
- Division of Pediatric Critical Care, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Muralidharan Jayashree
- Division of Pediatric Critical Care, Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Macdonald-Laurs E, Koirala A, Britton PN, Rawlinson W, Hiew CC, Mcrae J, Dale RC, Jones C, Macartney K, McMullan B, Pillai S. CSF neopterin, a useful biomarker in children presenting with influenza associated encephalopathy? Eur J Paediatr Neurol 2019; 23:204-213. [PMID: 30316638 PMCID: PMC7128712 DOI: 10.1016/j.ejpn.2018.09.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/07/2018] [Accepted: 09/23/2018] [Indexed: 12/18/2022]
Abstract
PURPOSE Neurological complications of influenza cause significant disease in children. Central nervous system inflammation, the presumed mechanism of influenza-associated encephalopathy, is difficult to detect. Characteristics of children presenting with severe neurological complications of influenza, and potential biomarkers of influenza-associated encephalopathy are described. METHODS A multi-center, retrospective case-series of children with influenza and neurological complications during 2017 was performed. Enrolled cases met criteria for influenza-associated encephalopathy or had status epilepticus. Functional outcome at discharge was compared between groups using the Modified Rankin Scale (mRS). RESULTS There were 22 children with influenza studied of whom 11/22 had encephalopathy and 11/22 had status epilepticus. Only one child had a documented influenza immunization. The biomarker CSF neopterin was tested in 10/11 children with encephalopathy and was elevated in 8/10. MRI was performed in all children with encephalopathy and was abnormal in 8 (73%). Treatment of children with encephalopathy was with corticosteroids or intravenous immunoglobulin in 9/11 (82%). In all cases oseltamivir use was low (59%) while admission to the intensive care unit was frequent (14/22, 66%). Clinical outcome at discharge was moderate to severe disability (mRS score > 2) in the majority of children with encephalopathy (7/11, 64%), including one child who died. Children with status epilepticus recovered to near-baseline function in all cases. CONCLUSION Raised CSF neopterin was present in most cases of encephalopathy, and along with diffusion restriction on MRI, is a useful diagnostic biomarker. Lack of seasonal influenza vaccination represents a missed opportunity to prevent illness in children, including severe neurological disease.
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Affiliation(s)
- Emma Macdonald-Laurs
- Sydney Children's Hospital Network (SCHN), Australia; The University of New South Wales, Australia.
| | - Archana Koirala
- Sydney Children's Hospital Network (SCHN), Australia; The University of New South Wales, Australia
| | - Philip N Britton
- Sydney Children's Hospital Network (SCHN), Australia; The University of Sydney, Discipline of Child and Adolescent Health, Australia
| | | | - Chee Chung Hiew
- Sydney Children's Hospital Network (SCHN), Australia; Prince of Wales Hospital, Sydney, Australia
| | | | - Russell C Dale
- Sydney Children's Hospital Network (SCHN), Australia; The University of Sydney, Discipline of Child and Adolescent Health, Australia
| | - Cheryl Jones
- Sydney Children's Hospital Network (SCHN), Australia; The University of Sydney, Discipline of Child and Adolescent Health, Australia; The Royal Children's Hospital, Melbourne, Australia; The University of Melbourne, Department of Paediatrics, Australia
| | - Kristine Macartney
- Sydney Children's Hospital Network (SCHN), Australia; The University of Sydney, Discipline of Child and Adolescent Health, Australia
| | - Brendan McMullan
- Sydney Children's Hospital Network (SCHN), Australia; The University of New South Wales, Australia
| | - Sekhar Pillai
- Sydney Children's Hospital Network (SCHN), Australia; The University of New South Wales, Australia
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12
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Bohmwald K, Gálvez NMS, Ríos M, Kalergis AM. Neurologic Alterations Due to Respiratory Virus Infections. Front Cell Neurosci 2018; 12:386. [PMID: 30416428 PMCID: PMC6212673 DOI: 10.3389/fncel.2018.00386] [Citation(s) in RCA: 400] [Impact Index Per Article: 66.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 10/09/2018] [Indexed: 11/14/2022] Open
Abstract
Central Nervous System (CNS) infections are one of the most critical problems in public health, as frequently patients exhibit neurologic sequelae. Usually, CNS pathologies are caused by known neurotropic viruses such as measles virus (MV), herpes virus and human immunodeficiency virus (HIV), among others. However, nowadays respiratory viruses have placed themselves as relevant agents responsible for CNS pathologies. Among these neuropathological viruses are the human respiratory syncytial virus (hRSV), the influenza virus (IV), the coronavirus (CoV) and the human metapneumovirus (hMPV). These viral agents are leading causes of acute respiratory infections every year affecting mainly children under 5 years old and also the elderly. Up to date, several reports have described the association between respiratory viral infections with neurological symptoms. The most frequent clinical manifestations described in these patients are febrile or afebrile seizures, status epilepticus, encephalopathies and encephalitis. All these viruses have been found in cerebrospinal fluid (CSF), which suggests that all these pathogens, once in the lungs, can spread throughout the body and eventually reach the CNS. The current knowledge about the mechanisms and routes used by these neuro-invasive viruses remains scarce. In this review article, we describe the most recent findings associated to neurologic complications, along with data about the possible invasion routes of these viruses in humans and their various effects on the CNS, as studied in animal models.
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Affiliation(s)
- Karen Bohmwald
- Millennium Institute on Immunology and Immunotherapy (MIII), Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Nicolás M. S. Gálvez
- Millennium Institute on Immunology and Immunotherapy (MIII), Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Mariana Ríos
- Millennium Institute on Immunology and Immunotherapy (MIII), Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alexis M. Kalergis
- Millennium Institute on Immunology and Immunotherapy (MIII), Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- Departamento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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13
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Britton PN, Blyth CC, Macartney K, Dale RC, Li-Kim-Moy J, Khandaker G, Crawford NW, Marshall H, Clark JE, Elliott EJ, Booy R, Cheng AC, Jones CA. The Spectrum and Burden of Influenza-Associated Neurological Disease in Children: Combined Encephalitis and Influenza Sentinel Site Surveillance From Australia, 2013-2015. Clin Infect Dis 2018; 65:653-660. [PMID: 29017268 DOI: 10.1093/cid/cix412] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 04/27/2017] [Indexed: 11/14/2022] Open
Abstract
Background There are few longitudinal studies of seasonal influenza-associated neurological disease (IAND) and none from the Southern Hemisphere. Methods We extracted prospectively acquired Australian surveillance data from 2 studies nested within the Paediatric Active Enhanced Disease Surveillance (PAEDS) network: the Influenza Complications Alert Network (FluCAN) study and the Australian Childhood Encephalitis (ACE) study between 2013 and 2015. We described the clinical features and severity of IAND in children, including influenza-associated encephalitis/encephalopathy (IAE). We calculated the proportion of hospitalized influenza that is associated with IAND and IAE, and incidence of IAE. Results Over 3 influenza seasons, we identified 54 cases of IAND at 2 tertiary children's hospitals from Australia that accounted for 7.6% of hospitalized influenza. These included 10 cases of IAE (1.4% hospitalized influenza). The mean annual incidence of IAE among Australian children (aged ≤14 years) was 2.8 per 1000000. The spectrum of IAND was broad and included IAE (n = 10) including distinct acute encephalopathy syndromes, simple febrile seizures (n = 14), other seizures (n = 16), acute ataxia (n = 4), and other subacute syndromes (transverse myelitis [n = 1], opsoclonus myoclonus [n = 1]). Two-thirds of children with IAND were aged ≤4 years; less than half had preexisting neurological disease or other risk factors for severe influenza. IAE caused death or neurological morbidity in half of cases. Conclusions Seasonal influenza is an important cause of acute neurological disease in Australian children. The spectrum of seasonal IAND appears similar to that described during the 2009 H1N1 pandemic. IAE is associated with high morbidity and mortality.
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Affiliation(s)
- Philip N Britton
- Sydney Medical School, University of Sydney, NSW.,Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney.,Children's Hospital at Westmead, New South Wales
| | - Christopher C Blyth
- Department of Infectious Diseases and Department of Microbiology, Princess Margaret Hospital, Subiaco.,Department of Microbiology, PathWest Laboratory, Nedlands, Western Australia.,School of Medicine, University of Western Australia.,Wesfarmers Centre for Vaccines and Infectious Diseases, Telethon Kids Institute
| | - Kristine Macartney
- Sydney Medical School, University of Sydney, NSW.,Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney.,Children's Hospital at Westmead, New South Wales.,National Centre for Immunisation Research and Surveillance, Westmead, New South Wales
| | - Russell C Dale
- Sydney Medical School, University of Sydney, NSW.,Children's Hospital at Westmead, New South Wales
| | - Jean Li-Kim-Moy
- Sydney Medical School, University of Sydney, NSW.,Children's Hospital at Westmead, New South Wales.,National Centre for Immunisation Research and Surveillance, Westmead, New South Wales
| | - Gulam Khandaker
- Sydney Medical School, University of Sydney, NSW.,National Centre for Immunisation Research and Surveillance, Westmead, New South Wales
| | - Nigel W Crawford
- Royal Children's Hospital, Melbourne, Victoria.,Murdoch Children's Research Institute and University of Melbourne, Victoria
| | - Helen Marshall
- Women's and Children's Hospital, Adelaide Medical School, University of Adelaide, South Australia
| | - Julia E Clark
- Lady Cilento Children's Hospital, Queensland.,School of Medicine, University of Queensland, Brisbane
| | - Elizabeth J Elliott
- Sydney Medical School, University of Sydney, NSW.,Australian Paediatric Surveillance Unit, Westmead, New South Wales
| | - Robert Booy
- Sydney Medical School, University of Sydney, NSW.,Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney.,Children's Hospital at Westmead, New South Wales.,National Centre for Immunisation Research and Surveillance, Westmead, New South Wales
| | - Allen C Cheng
- School of Public Health and Preventive Medicine, Monash University.,Infection Prevention and Healthcare Epidemiology Unit, Alfred Health, Melbourne, Victoria, Australia
| | - Cheryl A Jones
- Sydney Medical School, University of Sydney, NSW.,Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney.,Royal Children's Hospital, Melbourne, Victoria.,Murdoch Children's Research Institute and University of Melbourne, Victoria
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14
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Challenges of Treating Adenovirus Infection: Application of a Deployable Rapid-Assembly Shelter Hospital. Disaster Med Public Health Prep 2017; 12:109-114. [PMID: 28260561 DOI: 10.1017/dmp.2016.187] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This article outlines the evolution of a rescue team in responding to adenovirus prevention with a deployable field hospital. The local governments mobilized a shelter hospital and a rescue team consisting of 59 members to assist with rescue and response efforts after an epidemic outbreak of adenovirus. We describe and evaluate the challenges of preparing for deployment, field hospital maintenance, treatment mode, and primary treatment methods. The field hospital established at the rescue scene consisted of a medical command vehicle, a computed tomography shelter, an X-ray shelter, a special laboratory shelter, an oxygen and electricity supply vehicle, and epidemic prevention and protection equipment. The rescue team comprised paramedics, physicians, X-ray technicians, respiratory therapists, and logistical personnel. In 22 days, more than 3000 patients with suspected adenovirus infection underwent initial examinations. All patients were properly treated, and no deaths occurred. After emergency measures were implemented, the spread of adenovirus was eventually controlled. An emergency involving infectious diseases in less-developed regions demands the rapid development of a field facility with specialized medical personnel when local hospital facilities are either unavailable or unusable. An appropriate and detailed prearranged action plan is important for infectious diseases prevention. (Disaster Med Public Health Preparedness. 2018;12:109-114).
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15
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Mammas IN, Theodoridou M, Kramvis A, Thiagarajan P, Gardner S, Papaioannou G, Melidou A, Koutsaki M, Kostagianni G, Achtsidis V, Koutsaftiki C, Calachanis M, Zaravinos A, Greenough A, Spandidos DA. Paediatric Virology: A rapidly increasing educational challenge. Exp Ther Med 2017; 13:364-377. [PMID: 28352303 PMCID: PMC5348700 DOI: 10.3892/etm.2016.3997] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 12/16/2016] [Indexed: 12/12/2022] Open
Abstract
The '2nd Workshop on Paediatric Virology', which took place on Saturday the 8th of October 2016 in Athens, Greece, provided an overview on recent views and advances on Paediatric Virology. Emphasis was given to HIV-1 management in Greece, a country under continuous financial crisis, hepatitis B vaccination in Africa, treatment options for hepatitis C virus in childhood, Zika virus in pregnancy and infancy, the burden of influenza on childhood, hand-foot-mouth disease and myocarditis associated with Coxsackie viruses. Other general topics covered included a critical evaluation of Paediatric Accident and Emergency viral infections, multimodality imaging of viral infections in children, surgical approaches of otolaryngologists to complex viral infections, new advances in the diagnosis and treatment of viral conjunctivitis and novel molecular diagnostic methods for HPV in childhood. A brief historical overview of the anti-vaccination movement was also provided, as well as presentations on the educational challenge of Paediatric Virology as a new subspecialty of Paediatrics. This review highlights selected lectures and discussions of the workshop.
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Affiliation(s)
- Ioannis N. Mammas
- Department of Clinical Virology, School of Medicine, University of Crete, Heraklion 71003, Greece
| | - Maria Theodoridou
- 1st Department of Paediatrics, ‘Aghia Sophia’ Children's Hospital, University of Athens School of Medicine, Athens 11527, Greece
| | - Anna Kramvis
- Hepatitis Virus Diversity Research Unit, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa
| | - Prakash Thiagarajan
- Neonatal Unit, Division for Women's and Children's Health, Noble's Hospital, Douglas, Isle of Man IM4 4RJ, British Isles
| | - Sharryn Gardner
- Department of Children's Accident and Emergency, Southport and Ormskirk Hospital NHS Trust, Ormskirk L39 2AZ, UK
| | - Georgia Papaioannou
- Department of Paediatric Radiology, ‘Mitera’ Children's Hospital, Athens 15123, Greece
| | - Angeliki Melidou
- 2nd Laboratory of Microbiology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Maria Koutsaki
- Paediatric Neurology Division, 3rd Department of Paediatrics, School of Medicine, University of Athens, ‘Attikon’ University Hospital, Athens 12462, Greece
| | - Georgia Kostagianni
- Department of Otorhinolaryngology - Head and Neck Surgery, ‘Triassio’ General Hospital, Elefsina 19200, Greece
| | - Vassilis Achtsidis
- Department of Ophthalmology, Royal Cornwall Hospitals, Truro, Cornwall TR1 3LQ, UK
| | - Chryssie Koutsaftiki
- Paediatric Intensive Care Unit (PICU), ‘Penteli’ Children's Hospital, Penteli 15236, Greece
| | - Marcos Calachanis
- Department of Paediatric Cardiology, ‘Penteli’ Children's Hospital, Penteli 15236, Greece
| | - Apostolos Zaravinos
- Department of Life Sciences, School of Sciences, European University Cyprus, Nicosia 1516, Cyprus
| | - Anne Greenough
- Division of Asthma, Allergy and Lung Biology, King's College London, London SE5 9RS, UK
| | - Demetrios A. Spandidos
- Department of Clinical Virology, School of Medicine, University of Crete, Heraklion 71003, Greece
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16
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Achiriloaie A, Michelson D, Lei L, Denham L, Oberg K, Raghavan R. Acute Postviral Encephalopathy: Pathologic and Radiologic Correlation in an Atypical Case. Child Neurol Open 2016; 3:2329048X16658845. [PMID: 28503611 PMCID: PMC5417279 DOI: 10.1177/2329048x16658845] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/28/2016] [Accepted: 06/05/2016] [Indexed: 12/02/2022] Open
Abstract
The authors report a case of fatal acute encephalopathy following influenza infection, with slightly atypical pathological and imaging findings. A healthy 8-year-old boy with probable recent influenza A/B infection admitted for refractory seizures was placed on phenobarbital coma and later developed hemodynamic instability. Magnetic resonance imaging revealed bilateral cerebral and cerebellar white matter lesions and microhemorrhages. Following his demise, the autopsy revealed a large area of necrosis in the right centrum semiovale with similar lesions in the temporal and cerebellar regions. Microscopically, there was extensive coagulative necrosis, compatible with necrotizing white matter encephalopathy, and neuronal loss suggesting superimposed hypoxic–ischemia. The acute progressive neurologic deterioration was partly reminiscent on acute necrotizing encephalopathy, a condition recently associated with influenza A. In acute necrotizing encephalopathy, typical brain findings are characterized by bilateral thalamic necrosis/petechiae with variable white matter edema. The somewhat atypical findings in our case can relate to superadded cardiovascular collapse and hypoxic–ischemic effects.
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Affiliation(s)
- Adina Achiriloaie
- Department of Radiology, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - David Michelson
- Department of Neurology, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - Li Lei
- Department of Pathology, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - Laura Denham
- Department of Pathology, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - Kerby Oberg
- Department of Pathology, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - Ravi Raghavan
- Department of Pathology, Loma Linda University Medical Center, Loma Linda, CA, USA
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17
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Yoganathan S, Sudhakar SV, James EJ, Thomas MM. Acute necrotising encephalopathy in a child with H1N1 influenza infection: a clinicoradiological diagnosis and follow-up. BMJ Case Rep 2016; 2016:bcr-2015-213429. [PMID: 26759402 DOI: 10.1136/bcr-2015-213429] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Acute necrotising encephalopathy of childhood (ANEC) is a fulminant disorder with rapid progressive encephalopathy, seizures and poor outcome. It has been reported in association with various viral infections. We describe the clinicoradiological findings and short-term follow-up in a child with H1N1 influenza-associated ANEC. Laminar, target or tricolour pattern of involvement of the thalami was seen on apparent diffusion coefficient images. Our patient had significant morbidity at discharge despite early diagnosis and management with oseltamivir and immunoglobulin. Repeat imaging after 3 months had shown significant resolution of thalamic swelling, but there was persistence of cytotoxic oedema involving bilateral thalami. She was pulsed with intravenous steroids and maintained on a tapering schedule of oral steroids. This report emphasises the need for a high index of suspicion to establish early diagnosis, promotion of widespread immunisation strategies to prevent influenza outbreak, and more research to establish standard treatment protocols for this under-recognised entity.
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Affiliation(s)
- Sangeetha Yoganathan
- Department of Neurological Sciences, Christian Medical College, Vellore, Tamilnadu, India
| | - Sniya Valsa Sudhakar
- Department of Radiodiagnosis, Christian Medical College, Vellore, Tamil Nadu, India
| | - Ebor Jacob James
- Department of Pediatrics, Christian Medical College, Vellore, Tamilnadu, India
| | - Maya Mary Thomas
- Department of Neurological Sciences, Christian Medical College, Vellore, Tamilnadu, India
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18
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Tomás J, Macário MC, Gaspar E, Santana I. Severe post-influenza (H1N1) encephalitis involving pulvinar nuclei in an adult patient. BMJ Case Rep 2015; 2015:bcr-2015-212667. [PMID: 26494725 DOI: 10.1136/bcr-2015-212667] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Neurological complications of H1N1 infections are mostly found in children, but rare cases of acute encephalopathy and post-infectious encephalitis such as acute disseminated encephalomyelitis (ADEM) have been described in adults. We report a case of an adult presenting with a progressive and severe encephalopathy that developed after H1N1 respiratory infection resolution. Cerebrospinal fluid (CSF) analysis was normal, including negative PCR for herpes simplex virus, H1N1, influenza B and JC virus, and absent oligoclonal IgG bands in CSF and serum. Initial CT scan was normal, but later MRI showed posterior multifocal leucoencephalopathy with pulvinar sign. The delayed neurological findings together with the ancillary investigation, namely the MRI pattern with both grey and white matter involvement, raised the possibility of a post-infectious process, rather than an acute encephalitis. Despite aggressive immunotherapy, the patient experienced severe neurological sequelae. Early recognition of ADEM manifestations by those dealing with H1N1 infection is important as early immunotherapy may improve the prognosis.
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Affiliation(s)
- José Tomás
- Neurology Department, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - Maria Carmo Macário
- Neurology Department, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - Elsa Gaspar
- Department of Internal Medicine, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - Isabel Santana
- Neurology Department, Coimbra Hospital and University Centre, Coimbra, Portugal
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19
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Sadasivan S, Zanin M, O’Brien K, Schultz-Cherry S, Smeyne RJ. Induction of microglia activation after infection with the non-neurotropic A/CA/04/2009 H1N1 influenza virus. PLoS One 2015; 10:e0124047. [PMID: 25861024 PMCID: PMC4393251 DOI: 10.1371/journal.pone.0124047] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 02/26/2015] [Indexed: 12/29/2022] Open
Abstract
Although influenza is primarily a respiratory disease, it has been shown, in some cases, to induce encephalitis, including people acutely infected with the pandemic A/California/04/2009 (CA/09) H1N1 virus. Based on previous studies showing that the highly pathogenic avian influenza (HPAI) A/Vietnam/1203/2004 H5N1 virus was neurotropic, induced CNS inflammation and a transient parkinsonism, we examined the neurotropic and inflammatory potential of the CA/09 H1N1 virus in mice. Following intranasal inoculation, we found no evidence for CA/09 H1N1 virus neurotropism in the enteric, peripheral or central nervous systems. We did, however, observe a robust increase in microglial activity in the brain characterized by an increase in the number of activated Iba-1-positive microglia in the substantia nigra (SN) and the hippocampus, despite the absence of virus in the brain. qPCR analysis in SN tissue showed that the induction of microgliosis was preceded by reduced gene expression of the neurotrophic factors bdnf, and gdnf and increases in the immune modulatory chemokine chemokine (C-C motif) ligand 4 (ccl4). We also noted changes in the expression of transforming growth factor-1 (tgfβ1) in the SN starting at 7 days post-infection (dpi) that was sustained through 21 dpi, coupled with increases in arginase-1 (arg1) and csf1, M2 markers for microglia. Given that neuroinflammation contributes to generation and progression of a number of neurodegenerative disorders, these findings have significant implications as they highlight the possibility that influenza and perhaps other non-neurotropic viruses can initiate inflammatory signals via microglia activation in the brain and contribute to, but not necessarily be the primary cause of, neurodegenerative disorders.
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Affiliation(s)
- Shankar Sadasivan
- Department of Developmental Neurobiology, Saint Jude Children’s Research Hospital, Memphis, Tennessee, 38105, United States of America
| | - Mark Zanin
- Department of Infectious Diseases, Saint Jude Children’s Research Hospital, Memphis, Tennessee, 38105, United States of America
| | - Kevin O’Brien
- Department of Infectious Diseases, Saint Jude Children’s Research Hospital, Memphis, Tennessee, 38105, United States of America
| | - Stacey Schultz-Cherry
- Department of Infectious Diseases, Saint Jude Children’s Research Hospital, Memphis, Tennessee, 38105, United States of America
| | - Richard J. Smeyne
- Department of Developmental Neurobiology, Saint Jude Children’s Research Hospital, Memphis, Tennessee, 38105, United States of America
- * E-mail:
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20
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New Onset Refractory Status Epilepticus in a Young Man with H1N1 Infection. Case Rep Neurol Med 2014; 2014:585428. [PMID: 25379313 PMCID: PMC4213402 DOI: 10.1155/2014/585428] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/30/2014] [Accepted: 09/01/2014] [Indexed: 12/02/2022] Open
Abstract
Objective. To report a case of refractory status epilepticus (SE) as an unusual early manifestation of H1N1 influenza infection.
Introduction. H1N1 neurological complications have been reported and consist mainly of seizures or encephalopathy occurring in children. However,
we only found a single report of an adult developing complex partial SE with H1N1 infection. Case Report. A 21-year-old previously healthy man was
brought to the emergency room (ER) after a witnessed generalized tonic clonic seizure (GTCS). He was fully alert and afebrile upon ER arrival, but a second GTCS
prompted treatment with Lorazepam and Fosphenytoin. The initial EEG showed diffuse slowing, but a repeat one requested as the patient failed to regain
consciousness revealed recurrent focal seizures of independent bihemispheric origin, fulfilling the criteria for nonconvulsive SE. Chest X-ray, followed by chest
CT scan, showed a left upper lobe consolidation. H1N1 infection was confirmed with PCR on bronchoalveolar lavage material. Despite aggressive treatment with
Midazolam, Propofol, and multiple high dose antiepileptic drugs, the electrographic seizures recurred at every attempt to reduce the intravenous sedative drugs.
The patient died two weeks after his initial presentation. Conclusion. H1N1 should be added to the list of rare causes of refractory SE, regardless of
the patient's age.
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