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Karch JL, Okorie CL, Maymone MBC, Laughter M, Vashi NA. Vascular cutaneous manifestations of COVID-19 and RNA viral pathogens: a systematic review. Clin Exp Dermatol 2024; 49:313-324. [PMID: 37936304 DOI: 10.1093/ced/llad377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 11/09/2023]
Abstract
BACKGROUND COVID-19, the widely recognized and highly contagious respiratory tract infection, has had a substantial impact on the field of dermatology since its emergence in 2019. SARS-CoV-2, the causative virus of COVID-19, is classified as an RNA virus. Various skin-related symptoms have been reported in patients with COVID-19, most notably the distinctive purple-red acral rash resembling chilblain lesions, commonly referred to as 'COVID toe'; similarly, skin-related symptoms have been observed in connection with other RNA viruses. OBJECTIVES To explore the relationship between RNA viruses and their associated vascular cutaneous manifestations vs. those observed in patients infected with SARS-CoV-2. METHODS A systematic literature review was conducted using PubMed and medical subject heading terms related to RNA viruses and related skin manifestations. RESULTS In total, 3994 patients diagnosed with COVID-19 presenting with skin rashes were included. Chilblain-like lesions were most frequently observed (30.2%), followed by erythematous maculopapular/morbilliform rashes (9.1%) and urticarial rashes (4.7%). Of 8362 patients diagnosed with RNA viruses, more than half of the skin findings reported were erythematous/maculopapular/morbilliform rashes (52.3%), followed by unspecified (11.3%) and purpuric rashes (10.6%). CONCLUSIONS When comparing RNA viral infections with COVID-19 infection, we observed similarities in the reported skin manifestations and their presumed pathways, with many implicated in the proinflammatory response. Owing to the wide range of cutaneous symptoms associated with RNA viruses and our currently limited understanding of the underlying mechanisms, additional research is warranted to investigate the pathology behind viral-induced skin lesions.
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Affiliation(s)
- Jamie L Karch
- Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | - Chiamaka L Okorie
- Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | - Mayra B C Maymone
- Department of Dermatology, The Warren Alpert Medical School, Brown University, Providence, RI, USA
| | - Melissa Laughter
- Department of Dermatology, New York University, New York, NY, USA
| | - Neelam A Vashi
- Department of Dermatology, Boston University School of Medicine, Boston, MA, USA
- Department of Dermatology, US Department of Veteran Affairs, Boston Health Care System, Boston, MA, USA
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2
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Ponomareva NV, Novikova NA. Neurotropic enteroviruses (Picornaviridae: Enterovirus): predominant types, basis of neurovirulence. Vopr Virusol 2023; 68:479-487. [PMID: 38156564 DOI: 10.36233/0507-4088-205] [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: 11/26/2023] [Indexed: 12/30/2023]
Abstract
Enteroviruses are one of the most common causative agents of infectious diseases of the central nervous system. They are characterized by genetic variability, the ability to infect a wide range of cells, including brain microglial cells and astrocytes, and persist in the central nervous system tissue, causing delayed and chronic diseases. The review presents data on the basis of neurovirulence of non-polio enteroviruses and the most common pathogens causing enteroviral neuroinfections.
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Affiliation(s)
- N V Ponomareva
- Academician I.N. Blokhina Nizhny Novgorod Scientific Research Institute of Epidemiology and Microbiology of the Rospotrebnadzor
| | - N A Novikova
- Academician I.N. Blokhina Nizhny Novgorod Scientific Research Institute of Epidemiology and Microbiology of the Rospotrebnadzor
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3
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Wells AI, Coyne CB. An In Vivo Model of Echovirus-Induced Meningitis Defines the Differential Roles of Type I and Type III Interferon Signaling in Central Nervous System Infection. J Virol 2022; 96:e0033022. [PMID: 35699446 PMCID: PMC9278148 DOI: 10.1128/jvi.00330-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/20/2022] [Indexed: 11/20/2022] Open
Abstract
Echoviruses are among the most common worldwide causes of aseptic meningitis, which can cause long-term sequelae and death, particularly in neonates. However, the mechanisms by which these viruses induce meningeal inflammation are poorly understood, owing at least in part to the lack of in vivo models that recapitulate this aspect of echovirus pathogenesis. Here, we developed an in vivo neonatal mouse model that recapitulates key aspects of echovirus-induced meningitis. We show that expression of the human homologue of the primary echovirus receptor, the neonatal Fc receptor (FcRn), is not sufficient for infection of the brains of neonatal mice. However, ablation of type I, but not III, interferon (IFN) signaling in mice expressing human FcRn permitted high levels of echovirus replication in the brain, with corresponding clinical symptoms, including delayed motor skills and hind-limb weakness. Using this model, we defined the immunological response of the brain to echovirus infection and identified key cytokines, such as granulocyte colony-stimulating factor (G-CSF) and interleukin 6 (IL-6), that were induced by this infection. Lastly, we showed that echoviruses specifically replicate in the leptomeninges, where they induce profound inflammation and cell death. Together, this work establishes an in vivo model of aseptic meningitis associated with echovirus infections that delineates the differential roles of type I and type III IFNs in echovirus-associated neuronal disease and defines the specificity of echoviral infections within the meninges. IMPORTANCE Echoviruses are among the most common worldwide causes of aseptic meningitis, which can cause long-term sequelae or even death. The mechanisms by which echoviruses infect the brain are poorly understood, largely owing to the lack of robust in vivo models that recapitulate this aspect of echovirus pathogenesis. Here, we establish a neonatal mouse model of echovirus-induced aseptic meningitis and show that expression of the human homologue of the FcRn, the primary receptor for echoviruses, and ablation of type I IFN signaling are required to recapitulate echovirus-induced meningitis and clinical disease. These findings provide key insights into the host factors that control echovirus-induced meningitis and a model that could be used to test anti-echovirus therapeutics.
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Affiliation(s)
- Alexandra I. Wells
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Carolyn B. Coyne
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, USA
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, USA
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4
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Del Giudice P, Hubiche T. Disseminated febrile punctiform erythematous and petechial eruption in children - a paraviral phenomenon. J Eur Acad Dermatol Venereol 2022; 36:e887-e888. [PMID: 35690991 DOI: 10.1111/jdv.18320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 06/03/2022] [Indexed: 11/30/2022]
Affiliation(s)
- P Del Giudice
- Infectiology and Dermatology Unit, Centre Hospitalier Intercommunal de Fréjus-Saint-Raphaël, Fréjus, France
| | - T Hubiche
- Infectiology and Dermatology Unit, Centre Hospitalier Intercommunal de Fréjus-Saint-Raphaël, Fréjus, France.,Dermatology, Centre Hospitalier Universitaire de Nice, Hôpital L'Archet, Nice, France
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5
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Löscher W, Howe CL. Molecular Mechanisms in the Genesis of Seizures and Epilepsy Associated With Viral Infection. Front Mol Neurosci 2022; 15:870868. [PMID: 35615063 PMCID: PMC9125338 DOI: 10.3389/fnmol.2022.870868] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/05/2022] [Indexed: 12/16/2022] Open
Abstract
Seizures are a common presenting symptom during viral infections of the central nervous system (CNS) and can occur during the initial phase of infection ("early" or acute symptomatic seizures), after recovery ("late" or spontaneous seizures, indicating the development of acquired epilepsy), or both. The development of acute and delayed seizures may have shared as well as unique pathogenic mechanisms and prognostic implications. Based on an extensive review of the literature, we present an overview of viruses that are associated with early and late seizures in humans. We then describe potential pathophysiologic mechanisms underlying ictogenesis and epileptogenesis, including routes of neuroinvasion, viral control and clearance, systemic inflammation, alterations of the blood-brain barrier, neuroinflammation, and inflammation-induced molecular reorganization of synapses and neural circuits. We provide clinical and animal model findings to highlight commonalities and differences in these processes across various neurotropic or neuropathogenic viruses, including herpesviruses, SARS-CoV-2, flaviviruses, and picornaviruses. In addition, we extensively review the literature regarding Theiler's murine encephalomyelitis virus (TMEV). This picornavirus, although not pathogenic for humans, is possibly the best-characterized model for understanding the molecular mechanisms that drive seizures, epilepsy, and hippocampal damage during viral infection. An enhanced understanding of these mechanisms derived from the TMEV model may lead to novel therapeutic interventions that interfere with ictogenesis and epileptogenesis, even within non-infectious contexts.
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Affiliation(s)
- Wolfgang Löscher
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
| | - Charles L. Howe
- Division of Experimental Neurology, Department of Neurology, Mayo Clinic, Rochester, MN, United States
- Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN, United States
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6
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Zhang M, Guo W, Xu D, Feng C, Bao G, Sun H, Yang Z, Ma S. Molecular characterization of echovirus 9 strains isolated from hand-foot-and-mouth disease in Kunming, Yunnan Province, China. Sci Rep 2022; 12:2293. [PMID: 35145190 PMCID: PMC8831506 DOI: 10.1038/s41598-022-06309-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 01/24/2022] [Indexed: 11/09/2022] Open
Abstract
Echovirus 9 (E9) belongs to the species Enterovirus B. So far, 12 whole genome sequences of E9 are available in GenBank. In this study, we determined the whole genomic sequences of five E9 strains isolated from the stools of patients with hand-foot-and-mouth disease in Kunming, Yunnan Province, China, in 2019. Their nucleotide and amino acid sequences shared 80.8–80.9% and 96.4–96.8% identity with the prototype Hill strain, respectively, and shared 99.3–99.9% and 99.1–99.8% mutual identity, respectively. Recombination analyses revealed that intertype recombination had occurred in the 2C and 3D regions of the five Yunnan E9 strains with coxsackieviruses B5 and B4, respectively. This study augmented the whole genome sequences of E9 in the GenBank database and extended the molecular characterization of this virus in China.
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Affiliation(s)
- Ming Zhang
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China.,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China
| | - Wei Guo
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China.,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China
| | - Danhan Xu
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China.,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China
| | - Changzeng Feng
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China.,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China
| | - Guohong Bao
- First People's Hospital of Yunnan Province, Kunming, People's Republic of China
| | - Hao Sun
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China.,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China
| | - Zhaoqing Yang
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China.,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China
| | - Shaohui Ma
- Institute of Medical Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Kunming, 650118, People's Republic of China. .,Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious Disease, Kunming, 650118, People's Republic of China.
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7
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Cheng W, Ji T, Zhou S, Shi Y, Jiang L, Zhang Y, Yan D, Yang Q, Song Y, Cai R, Xu W. Molecular epidemiological characteristics of echovirus 6 in mainland China: extensive circulation of genotype F from 2007 to 2018. Arch Virol 2021; 166:1305-1312. [PMID: 33638089 PMCID: PMC8036204 DOI: 10.1007/s00705-020-04934-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 11/04/2020] [Indexed: 11/26/2022]
Abstract
Echovirus 6 (E6) is associated with various clinical diseases and is frequently detected in environmental sewage. Despite its high prevalence in humans and the environment, little is known about its molecular phylogeography in mainland China. In this study, 114 of 21,539 (0.53%) clinical specimens from hand, foot, and mouth disease (HFMD) cases collected between 2007 and 2018 were positive for E6. The complete VP1 sequences of 87 representative E6 strains, including 24 strains from this study, were used to investigate the evolutionary genetic characteristics and geographical spread of E6 strains. Phylogenetic analysis based on VP1 nucleotide sequence divergence showed that, globally, E6 strains can be grouped into six genotypes, designated A to F. Chinese E6 strains collected between 1988 and 2018 were found to belong to genotypes C, E, and F, with genotype F being predominant from 2007 to 2018. There was no significant difference in the geographical distribution of each genotype. The evolutionary rate of E6 was estimated to be 3.631 × 10-3 substitutions site-1 year-1 (95% highest posterior density [HPD]: 3.2406 × 10-3-4.031 × 10-3 substitutions site-1 year-1) by Bayesian MCMC analysis. The most recent common ancestor of the E6 genotypes was traced back to 1863, whereas their common ancestor in China was traced back to around 1962. A small genetic shift was detected in the Chinese E6 population size in 2009 according to Bayesian skyline analysis, which indicated that there might have been an epidemic around that year.
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Affiliation(s)
- Wenjun Cheng
- Medical School, Anhui University of Science and Technology, Huainan, 232001, Anhui, People's Republic of China
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Tianjiao Ji
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Shuaifeng Zhou
- Hunan Provincial Centers for Disease Control and Prevention, Changsha, People's Republic of China
| | - Yong Shi
- Jiangxi Provincial Centers for Disease Control and Prevention, Nanchang, People's Republic of China
| | - Lili Jiang
- Yunnan Provincial Centers for Disease Control and Prevention, Kunming, People's Republic of China
| | - Yong Zhang
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Dongmei Yan
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Qian Yang
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Yang Song
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Ru Cai
- Medical School, Anhui University of Science and Technology, Huainan, 232001, Anhui, People's Republic of China.
| | - Wenbo Xu
- Medical School, Anhui University of Science and Technology, Huainan, 232001, Anhui, People's Republic of China.
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China.
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8
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Huang CW, Hsieh CH, Lin MR, Huang YC. Clinical features of gingivostomatitis due to primary infection of herpes simplex virus in children. BMC Infect Dis 2020; 20:782. [PMID: 33081701 PMCID: PMC7573873 DOI: 10.1186/s12879-020-05509-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 10/12/2020] [Indexed: 11/10/2022] Open
Abstract
Background Primary herpetic gingivostomatitis (PHGS) in children, though usually self-limited, might mimic bacterial and enteroviral pharyngitis clinically. We conducted a study to define the clinical features of PHGS in children. Methods Between January 2012 and December 2016, 282 inpatients aged less than 19 years with cell culture-confirmed herpes simplex virus (HSV) infection in a medical center were identified from the virologic laboratory logbook. Clinical data were retrospectively collected. Results Among the 282 inpatients, 185 cases were considered as PHGS and were included for analysis. Fever was present in 99.5%. The mean duration of fever was 5.11 days (±2.24) with the longest being 17 days. Common oral manifestations included oral ulcers (84.3%), which equally resided in the anterior and posterior part of the oral cavity (65.4% vs. 63.2%), gum swelling and/or bleeding (67.6%), and exudate coated tonsils (16.8%). Leukocytosis (WBC count > 15,000/uL3) was noted in 52 patients (28.1%) and a serum C-reactive protein level > 40 mg/L in 55 patients (29.7%). Fixty-five patients (35%) were diagnosed with PHGS on admission and were significantly more likely to have ulcers over the anterior oral cavity (76.1% vs. 26.7%) and gum swelling/bleeding (76.2% vs. 7.5%, p-value all < 0.001) on admission and were significantly less likely to receive antibiotic treatment (16.9 vs. 36.7%, p-value < 0.01) than others. Forty-six patients (25%) undiagnosed as PHGS on discharge were significantly more likely to have exudate coated on the tonsils, to receive antibiotic treatment and significantly less likely to have gum swelling/bleeding and oral ulcers (all p-values < 0.01). Conclusions Meticulously identifying specific oral manifestations of gum swelling/bleeding and ulcers over the anterior oral cavity in children can help making the diagnosis of PHGS earlier and subsequently reduce unnecessary prescription of antibiotics.
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Affiliation(s)
- Chen-Wei Huang
- Department of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chi-Hsien Hsieh
- Department of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Ming-Ru Lin
- Department of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Pediatrics, Chang Gung Memorial Hospital, No.5, Fu-Hsin Street, Kweishan, 333, Taoyuan, Taiwan
| | - Yhu-Chering Huang
- Department of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan. .,Department of Pediatrics, Chang Gung Memorial Hospital, No.5, Fu-Hsin Street, Kweishan, 333, Taoyuan, Taiwan.
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9
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Li J, Wang X, Cai J, Ge Y, Wang C, Qiu Y, Xia A, Zeng M. Non-polio enterovirus infections in children with central nervous system disorders in Shanghai, 2016-2018: Serotypes and clinical characteristics. J Clin Virol 2020; 129:104516. [PMID: 32585621 DOI: 10.1016/j.jcv.2020.104516] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 06/01/2020] [Accepted: 06/16/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND Non-polio enrerovirus causes a wide spectrum of neurologic syndromes. The epidemiological and clinical profiles of non-polio enrerovirus-associated central nervous system infections vary by regions and over year. OBJECTIVES This study aimed to understand the prevalence, serotypes and clinical characteristics of enterovirus-associated aseptic meningitis, encephalitis and meningo-encephalitis in children in Shanghai during 2016-2018. METHODS We collected the clinical data and the cerebrospinal fluid specimens from the pediatric patients with aseptic meningitis, encephalitis and meningo-encephalitis during 2016-2018. The nested RT-PCR and sequencing were performed to identify enterovirus and serotypes. RESULTS A total of 424 patients were included in this study and their non-duplicated cerebrospinal fluid specimens were collected during the acute stage of illness. Based on PCR assay, enterovirus was detected in 272 (64.15 %) patients, of whom, the ratio of male to female subjects was 1.99, and the mean age was 5.71 ± 3.55 years (range: 0.03-16 years). There were 17 serotypes identified. Echovirus 30 (24.63 %), Coxsackievirus A10 (20.96 %), Coxsackievirus A6 (18.01 %) accounted for 63.6 %, followed by Coxsackievirus B5 (7.72 %), Echovirus 6 (5.88 %), and other serotypes (22.8 %). Of the 10 (3.68 %) critically severe patients, all had refractory seizure, 8 required mechanical ventilation, 7 survivors had recurrent attacks of epilepsy and 3 abandoned treatment; Coxsackievirus A10, Echovirus 9, Coxsackievirus A2, Coxsackievirus A6 and Echovirus 6 were identified. CONCLUSIONS Non-polio enterovirus is the major pathogen causing aseptic meningitis, encephalitis and meningo-encephalitis in Chinese children and can cause life-threatening encephalitis and severe sequelae.
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Affiliation(s)
- Jingjing Li
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Xiangshi Wang
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Jiehao Cai
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Yanling Ge
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Chuning Wang
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Yue Qiu
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Aimei Xia
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
| | - Mei Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, 201102, China.
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10
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Coutinho CRM, Siqueira JAM, Machado RS, Bandeira RDS, Ferreira JL, Alves JCDS, Gabbay YB, Tavares FN. Enterovirus detection and serotyping of fecal material collected from three children living on the outskirts of Belém city, Amazon region, Brazil, during the first 3 years of life (1983-1986). J Med Virol 2020; 92:1075-1084. [PMID: 31840822 DOI: 10.1002/jmv.25656] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 12/12/2019] [Indexed: 12/17/2022]
Abstract
In the current investigation, fecal material was obtained during a community-based longitudinal study conducted from 1983 to 1986. This study consisted of 71 children aged newborn to 3 years. A total of 216 samples from three of these children were screened by real-time quantitative polymerase chain reaction (RT-qPCR) for the presence of enteroviruses, and positive samples were serotyped by VP1 and VP3 sequencing of the viral genome. Of these, 12 (5.6%) came from symptomatic cases, and the remaining asymptomatic cases were collected fortnightly during the 3 years of study. A positivity of 63.4% (137/216) was obtained by RT-qPCR, with 58.3% (7/12) in relation to the symptomatic group and 63.7% (130/204) in relation to the asymptomatic group. The 137 positive samples were inoculated into the RD, HEp2C, and L20B cell lines, and the cytopathic effect was observed in 37.2% (51/137) samples. It was also possible to identify 40.9% (56/137), between isolated (n = 46) and nonisolated (n = 10). Enterovirus serotype diversity (n = 25) was identified in this study, with the predominant species being B (80.3%), followed by C (16.1%) and A (3.6%). Cases of reinfection by different serotypes were also observed in the three children studied. Analyses involving different age groups of these minors confirmed that the most affected age was between 12 to 24 months, with a prevalence of 77.6% (52/67). The enterovirus (EV) circulated in the 3 years of research, showed peaks in some months, without defined seasonality. This study demonstrated a high circulation and serotype diversity of EV in fecal samples, collected over 30 years ago. This endorsed the evaluation of important points of the epidemiology of these viruses, such as the presence of coinfection and reinfection of the same individual by different circulating serotypes. Understanding the frequency and duration of EV infections is important in determining their association with persistent diarrhea.
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Affiliation(s)
- Carla Rafaela Monteiro Coutinho
- Programa de Pós-graduação em Biologia Parasitária na Amazônia (PPGBPA), Universidade do Estado do Pará - UEPA, Belém, Pará, Brazil
| | - Jones Anderson Monteiro Siqueira
- Laboratório de Norovírus e outros Vírus Gastroentéricos-LNOV, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Raiana Scerni Machado
- Laboratório de Enterovírus-LEV, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Renato Da Silva Bandeira
- Laboratório de Rotavírus, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - James Lima Ferreira
- Laboratório de Enterovírus-LEV, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Jainara Cristina Dos Santos Alves
- Laboratório de Enterovírus-LEV, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Yvone Benchimol Gabbay
- Laboratório de Norovírus e outros Vírus Gastroentéricos-LNOV, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
| | - Fernando Neto Tavares
- Laboratório de Enterovírus-LEV, Seção de Virologia-SAVIR, Instituto Evandro Chagas-IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, Pará, Brazil
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11
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Monge S, Benschop K, Soetens L, Pijnacker R, Hahné S, Wallinga J, Duizer E. Echovirus type 6 transmission clusters and the role of environmental surveillance in early warning, the Netherlands, 2007 to 2016. ACTA ACUST UNITED AC 2019; 23. [PMID: 30424830 PMCID: PMC6234528 DOI: 10.2807/1560-7917.es.2018.23.45.1800288] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background In the Netherlands, echovirus type 6 (E6) is identified through clinical and environmental enterovirus surveillance (CEVS and EEVS). Aim We aimed to identify E6 transmission clusters and to assess the role of EEVS in surveillance and early warning of E6. Methods We included all E6 strains from CEVS and EEVS from 2007 through 2016. CEVS samples were from patients with enterovirus illness. EEVS samples came from sewage water at pre-specified sampling points. E6 strains were defined by partial VP1 sequence, month and 4-digit postcode. Phylogenetic E6 clusters were detected using pairwise genetic distances. We identified transmission clusters using a combined pairwise distance in time, place and phylogeny dimensions. Results E6 was identified in 157 of 3,506 CEVS clinical episodes and 92 of 1,067 EEVS samples. Increased E6 circulation was observed in 2009 and from 2014 onwards. Eight phylogenetic clusters were identified; five included both CEVS and EEVS strains. Among these, identification in EEVS did not consistently precede CEVS. One phylogenetic cluster was dominant until 2014, but genetic diversity increased thereafter. Of 14 identified transmission clusters, six included both EEVS and CEVS; in two of them, EEVS identification preceded CEVS identification. Transmission clusters were consistent with phylogenetic clusters, and with previous outbreak reports. Conclusion Algorithms using combined time–place–phylogeny data allowed identification of clusters not detected by any of these variables alone. EEVS identified strains circulating in the population, but EEVS samples did not systematically precede clinical case surveillance, limiting EEVS usefulness for early warning in a context where E6 is endemic.
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Affiliation(s)
- Susana Monge
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control, (ECDC), Stockholm, Sweden.,Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Kimberley Benschop
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Loes Soetens
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.,Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Roan Pijnacker
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Susan Hahné
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Jacco Wallinga
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.,Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Erwin Duizer
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
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12
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Iwasaki J, Chai LY, Khoo SK, Bizzintino J, Laing IA, Le Souëf PN, Thomas WR, Hales BJ. Lower anti-echovirus antibody responses in children presenting to hospital with asthma exacerbations. Clin Exp Allergy 2016; 45:1523-30. [PMID: 25640320 DOI: 10.1111/cea.12501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/16/2014] [Accepted: 12/02/2014] [Indexed: 12/22/2022]
Abstract
BACKGROUND Rhinoviruses from the Enterovirus genus cause frequent infections and induce remarkably high titres of anticapsid antigen antibodies in asthmatics, while the prevalence of neutralising antibodies to the gut-trophic echoviruses from the same genus is diminished. OBJECTIVE To assess the absolute and specific antibody titres to VP1 antigens of the gut-trophic enteroviruses, echovirus 30 and Sabin 1 poliovirus, in asthmatic and non-asthmatic children. METHODS Recombinant polypeptides representing the VP1 capsid antigens of echovirus 30 and Sabin poliovirus 1 were produced. Their ability to bind IgG1 antibodies from the plasma of asthmatic (n = 45) and non-asthmatic (n = 29) children were quantitated by immunoassays that incorporated immunoabsorptions to remove cross-reactivity. RESULTS The IgG1 antibody titres and prevalence of antibody binding to echovirus 30 were significantly lower for asthmatic children compared to controls (P < 0.05) and inversely correlated with total IgE levels for the whole study population (r = -0.262; P < 0.05). There was no difference in the prevalence and titre between groups to the VP1 antigen of Sabin poliovirus. Anti-tetanus toxoid titres measured for comparison did not correlate with anti-echovirus or poliovirus, but correlated with anti-rhinovirus titres in controls but not asthmatics, where the titres were higher for the asthmatic group. CONCLUSIONS AND CLINICAL RELEVANCE The associations of lower antibody titres of asthmatic children to echovirus reported here and those of our previous findings of a heightened response to rhinovirus suggest a dichotomy where respiratory enterovirus infection/immunity increases the probability of developing asthma and enteric infections lower the risk. This provides further support for the concept of intestinal infection playing a key role in the development of allergic respiratory disease.
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Affiliation(s)
- J Iwasaki
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia
| | - L Y Chai
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia
| | - S-K Khoo
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia.,School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - J Bizzintino
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia.,School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - I A Laing
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia.,School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - P N Le Souëf
- School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
| | - W R Thomas
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia
| | - B J Hales
- Telethon Kids Institute, The University of Western Australia, Perth, WA, Australia.,School of Paediatrics and Child Health, The University of Western Australia, Perth, WA, Australia
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13
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Molecular characterization of a new human echovirus 11 isolate associated with severe hand, foot and mouth disease in Yunnan, China, in 2010. Arch Virol 2015; 160:2343-7. [DOI: 10.1007/s00705-015-2496-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/11/2015] [Indexed: 11/26/2022]
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14
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Danthanarayana N, Williams DT, Williams SH, Thevanesam V, Speers DJ, Fernando MSS. Acute meningoencephalitis associated with echovirus 9 infection in Sri Lanka, 2009. J Med Virol 2015; 87:2033-9. [PMID: 25983131 DOI: 10.1002/jmv.24267] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2015] [Indexed: 11/05/2022]
Abstract
The aetiology of acute meningoencephalitis in Sri Lankan children and adults is poorly understood. This study was carried out to determine pathogens responsible for meningoencephalitis in Sri Lanka. A hospital-based cross-sectional study was performed using cerebrospinal fluid samples (22 adult and 17 pediatric) collected from August to December 2009 from patients clinically diagnosed with acute meningoencephalitis at two tertiary care hospitals in Sri Lanka. Routine microbiology for bacterial pathogens together with in-house RT-PCR and PCR assays for the detection of dengue viruses, Japanese encephalitis virus, West Nile virus, chikungunya virus, enteroviruses, mumps virus, measles virus, herpes simplex viruses types 1 and 2, and varicella zoster virus were performed. Bacterial pathogens were not isolated from any patient specimens. However, from nine of the paediatric patients aged 1 month to 10 years (mean age 5.2 years) echovirus 9 (E-9; family Picornaviridae, genus Enterovirus,species Enterovirus B ) was detected by RT-PCR. All nine patients presented with fever, six had headache, and seven had vomiting. Neck stiffness indicating meningitis was present in six of the patients. Phylogenetic analysis of partial VP1 and VP4-VP2 genes showed these E-9 strains to be most closely related to E-9 strains detected in CSF from Korea and France in 2005 and 2006. The remaining patients were negative for all other viruses tested. E-9 was the most common cause of acute meningoencephalitis in the tested paediatric population from Sri Lanka in 2009, which likely reflects circulation of this E-9 strain between Europe and Asia over several years.
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Affiliation(s)
- Nayomi Danthanarayana
- Medical Research Institute, Colombo 08, Sri Lanka.,Teaching Hospital Karapitiya, Galle, Sri Lanka
| | - David T Williams
- PathWest Laboratory Medicine, Nedlands, Western Australia, Australia.,CSIRO, Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | | | - Vasanthi Thevanesam
- Department of Microbiology, Faculty of Medicine, University of Peradeniya, Sri Lanka
| | - David J Speers
- PathWest Laboratory Medicine, Nedlands, Western Australia, Australia.,School of Medicine and Pharmacology, University of Western Australia, Nedlands, Western Australia, Australia
| | - M S S Fernando
- Lady Ridgeway Children's Hospital, Colombo 08, Sri Lanka
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15
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Abstract
Invasion of the central nervous system (CNS) by viral agents typically produces a meningoencephalitis in which either meningitis or encephalitis may predominate. Viruses may also infect cranial or spinal blood vessels to produce ischemic injury. Viral and other infections may also elicit a host immune response which is cross-reactive with components of the neural tissue, resulting in encephalomyelitis, transverse myelitis, injury to peripheral nerves, or optic neuritis. This chapter discusses the pathogenesis of CNS viral infections and reviews clinical features of these disorders, major agents responsible in immunocompromised and immunocompetent individuals, and treatment. Prion diseases and postinfectious viral CNS syndromes including postinfectious encephalomyelitis, acute hemorrhagic leukoencephalitis, cerebellar ataxia, and transverse myelitis are also discussed.
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16
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Figueiredo CA, Luchs A, Russo DH, de Cassia Compagnoli Carmona R, Afonso AMS, de Oliveira MI, Curti SP, de Moraes JC, Toscano CM, Ciccone FH, Timenetsky MDCST. Rubella virus genotype 1G and echovirus 9 as etiologic agents of exanthematous diseases in Brazil: insights from phylogenetic analysis. Arch Virol 2013; 159:1445-51. [PMID: 24327091 DOI: 10.1007/s00705-013-1935-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 11/24/2013] [Indexed: 11/28/2022]
Abstract
The aim of the present study was to identify the rubella virus (RV) and enterovirus (EV) genotypes detected during the Epidemiological Surveillance on Exanthematic Febrile Diseases (VIGIFEX) study and to perform phylogenetic analysis. Ten RV- and four EV-positive oropharyngeal samples isolated from cell culture were subjected to RT-PCR and sequencing. Genotype 1G and echovirus 9 (E-9) was identified in RV- and EV-positive samples, respectively. The RV 1G genotype has been persisting in Brazil since 2000-2001. No evidence of E-9 being involved in exanthematic illness in Brazil has been reported previously. Differential laboratory diagnosis is essential for management of rash and fever disease.
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17
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Smura T, Kakkola L, Blomqvist S, Klemola P, Parsons A, Kallio-Kokko H, Savolainen-Kopra C, Kainov DE, Roivainen M. Molecular evolution and epidemiology of echovirus 6 in Finland. INFECTION GENETICS AND EVOLUTION 2013; 16:234-47. [DOI: 10.1016/j.meegid.2013.02.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 01/10/2013] [Accepted: 02/05/2013] [Indexed: 12/30/2022]
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18
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Yamayoshi S, Iizuka S, Yamashita T, Minagawa H, Mizuta K, Okamoto M, Nishimura H, Sanjoh K, Katsushima N, Itagaki T, Nagai Y, Fujii K, Koike S. Human SCARB2-dependent infection by coxsackievirus A7, A14, and A16 and enterovirus 71. J Virol 2012; 86:5686-96. [PMID: 22438546 PMCID: PMC3347270 DOI: 10.1128/jvi.00020-12] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 03/06/2012] [Indexed: 01/11/2023] Open
Abstract
Human enterovirus species A (HEV-A) consists of at least 16 members of different serotypes that are known to be the causative agents of hand, foot, and mouth disease (HFMD), herpangina, and other diseases, such as respiratory disease and polio-like flaccid paralysis. Enterovirus 71 (EV71) and coxsackievirus A16 (CVA16) are the major causative agents of HFMD. CVA5, CVA6, CVA10, and CVA12 mainly cause herpangina or are occasionally involved with sporadic cases of HFMD. We have previously shown that human scavenger receptor class B, member 2 (SCARB2) is a cellular receptor for EV71 and CVA16. Using a large number of clinical isolates of HEV-A, we explored whether all clinical isolates of EV71 and other serotypes of HEV-A infected cells via SCARB2. We tested this possibility by infecting L-SCARB2 cells, which are L929 cells expressing human SCARB2, by infecting human RD cells that had been treated with small interfering RNAs for SCARB2 and by directly binding the viruses to a soluble SCARB2 protein. We showed that all 162 clinical isolates of EV71 propagated in L-SCARB2 cells, suggesting that SCARB2 is the critical receptor common to all EV71 strains. In addition, CVA7, CVA14, and CVA16, which are most closely related to each other, also utilized SCARB2 for infection. EV71, CVA14, and CVA16 are highly associated with HFMD, and EV71 and CVA7 are occasionally associated with neurological diseases, suggesting that SCARB2 plays important roles in the development of these diseases. In contrast, another group of viruses, such as CVA2, CVA3, CVA4, CVA5, CVA6, CVA8, CVA10, and CVA12, which are relatively distant from the EV71 group, is associated mainly with herpangina. None of these clinical isolates infected via the SCARB2-dependent pathway. HEV-A viruses can be divided into at least two groups depending on the use of SCARB2, and the receptor usage plays an important role in developing the specific diseases for each group.
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Affiliation(s)
- Seiya Yamayoshi
- Neurovirology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Setsuko Iizuka
- Shimane Prefectural Institute of Public Health and Environmental Science, Matsue, Shimane, Japan
| | - Teruo Yamashita
- Aichi Prefectural Institute of Public Health, Nagoya, Aichi, Japan
| | - Hiroko Minagawa
- Aichi Prefectural Institute of Public Health, Nagoya, Aichi, Japan
| | - Katsumi Mizuta
- Yamagata Prefectural Institute of Public Health, Yamagata, Japan
| | - Michiko Okamoto
- Virus Research Center, Sendai Medical Center, Sendai, Miyagi, Japan
| | | | | | | | | | - Yukio Nagai
- Nagai Children's Clinic, Sendai, Miyagi, Japan
| | - Ken Fujii
- Neurovirology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Satoshi Koike
- Neurovirology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
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19
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Olofsson S, Brittain-Long R, Andersson LM, Westin J, Lindh M. PCR for detection of respiratory viruses: seasonal variations of virus infections. Expert Rev Anti Infect Ther 2011; 9:615-26. [PMID: 21819328 PMCID: PMC7103711 DOI: 10.1586/eri.11.75] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Real-time PCR and related methods have revolutionized the laboratory diagnosis of viral respiratory infections because of their high detection sensitivity, rapidness and potential for simultaneous detection of 15 or more respiratory agents. Results from studies with this diagnostic modality have significantly expanded our knowledge about the seasonality of viral respiratory diseases, pinpointed the difficulties to make a reliable etiologic diagnosis without the aid of an unbiased multiplex molecular assay for respiratory viruses, and revealed previously unknown details as to possible infections with multiple agents as aggravating factors. The scope of this article is to review and discuss this new knowledge and its implications for diagnostic strategies and other measures essential for the clinical management of respiratory viral infections and for epidemiological surveillance of seasonal respiratory infections.
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Affiliation(s)
- Sigvard Olofsson
- Department of Clinical Virology, University of Gothenburg, Guldhedsgatan 10B, S-413 46 Gothenburg, Sweden.
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20
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Cocirculation of two transmission lineages of echovirus 6 in jinan, china, as revealed by environmental surveillance and sequence analysis. Appl Environ Microbiol 2011; 77:3786-92. [PMID: 21478313 DOI: 10.1128/aem.03044-10] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Enterovirus environmental surveillance on sewage from the city of Jinan, Shandong Province, China, was initiated in 2008. Thirty echovirus 6 (E6) strains-1 in 2008 and 29 in 2010-were isolated and identified. Most E6 isolates (n = 21) came from the sewage collected on August 2010, revealing high local E6 activity at that time. Interestingly, the VP1 sequences of most isolates, even from the same sewage, were not identical. Phylogenetic analysis of VP1 sequences revealed two lineages for these isolates, with 78.0 to 80.0% nucleotide identities with one another, 94.8 to 100.0% identity within the major lineage, and 92.7 to 98.5% identity within the minor one. The VP1 sequences of environmental isolates, clinical isolates from 1998 to 2010, and global E6 were subjected to evolutionary analysis using Bayesian phylodynamic methods. The inferred E6 VP1 ancestral sequence dated back to 1901 (range, 1873 to 1928) and evolved with 7.047 × 10(-3) substitutions per site per year. Shandong E6 segregated into three clusters, and the two environmental lineages belonged to clusters A and C, which originated in 2003 and 1992, respectively. The antigenicity analysis via neutralization assay confirmed great antigenic differences between Shandong isolates and a prototype strain. These findings underscore the value of continuous environmental surveillance and genetic analysis to monitor circulating enteroviruses in the population and give further insight into E6 evolution.
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