672 results match your criteria: "Centre national de référence des Herpès virus[Affiliation]"

Toscana virus: A comprehensive review of 1381 cases showing an emerging threat in the Mediterranean regions.

J Infect

January 2025

Unité des Virus Émergents (UVE: Aix-Marseille Univ, Università di Corsica, IRD 190, Inserm 1207, IRBA), France; Laboratoire des Infections Virales Aigues et Tropicales, Pole des Maladies Infectieuses, AP-HM Hopitaux Universitaires de Marseille, France; Le Service de Prévention du Risque Infectieux (LESPRI), CLIN AP-HM Hôpitaux Universitaires de Marseille, France. Electronic address:

Background: Toscana virus (TOSV) is a sand fly-borne phlebovirus causing central nervous system (CNS) infection in Mediterranean countries, during summer season. However, clinical aspects of the disease caused by this virus are poorly known by clinicians, so that its prevalence is probably underestimated due to a lack of diagnosis.

Study Design: The data was gathered from all available case series and retrospective studies identifying TOSV as the causative viral agent.

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Article Synopsis
  • Human Aichi virus 1 (AiV-1) is a picornavirus linked to gastroenteritis and is found frequently in environmental waters, indicating potential fecal contamination.
  • Recent research examined 450 water samples from a Tunisian drinking water treatment plant and Sidi Salem dam, revealing 18.9% tested positive for AiV-1 with varying viral loads throughout different treatment stages.
  • The presence of infectious AiV-1 particles poses a public health risk, and the study highlights the effectiveness of the integrated cell culture approach combined with quantitative molecular detection (ICC-RT-qPCR) for monitoring viruses in water.
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Safety of baricitinib in vaccinated patients with severe and critical COVID-19 sub study of the randomised Bari-SolidAct trial.

EBioMedicine

January 2025

Research Institute of Internal Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway; Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Section for Clinical Immunology and Infectious Diseases, Oslo University Hospital Rikshospitalet, Oslo, Norway. Electronic address:

Background: The Bari-SolidAct randomized controlled trial compared baricitinib with placebo in patients with severe COVID-19. A post hoc analysis revealed a higher incidence of serious adverse events (SAEs) among SARS-CoV-2-vaccinated participants who had received baricitinib. This sub-study aimed to investigate whether vaccination influences the safety profile of baricitinib in patients with severe COVID-19.

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Performance of whole genome sequencing for respiratory syncytial virus: insights from the first external quality assessment, France, 2024.

Clin Microbiol Infect

December 2024

Laboratoire de Virologie, Institut des Agents Infectieux, Centre National de Référence des Virus des Infections Respiratoires, Hospices Civils de Lyon, Lyon, France; CIRI, Centre International de Recherche en Infectiologie, Team VirPath, Université de Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France; GenEPII Sequencing platform, Institut des Agents Infectieux, Hospices Civils de Lyon, Lyon, France. Electronic address:

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West Nile Virus (WNV) and Usutu virus (USUV) circulate through complex cryptic transmission cycles involving mosquitoes as vectors, birds as amplifying hosts and several mammal species as dead-end hosts. Both viruses can be transmitted to humans through mosquito bites, which can lead to neuroinvasive and potentially fatal disease. Notably, WNV can also be transmitted through blood donations and organ transplants.

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The pandemic dramatically accelerated research on vaccine attitudes and uptake, a field which mobilizes researchers from the social sciences and humanities as well as biomedical and public health disciplines. The field has the potential to contribute much more, but the growth in research and the deeper connections between disciplines brings challenges as well as opportunities. This perspective article assesses the recent development of the field, exploring progress whilst emphasizing that not enough attention has been paid to national and local contexts.

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Mosquito-borne viruses represent a large global health burden. With geographic expansion of competent vectors for chikungunya virus (CHIKV), dengue virus (DENV), and Zika virus (ZIKV) in Europe, it is anticipated that the number of autochthonous cases of these tropical viruses in Europe will increase. Therefore, regular assessment of diagnostic capabilities in Europe is important.

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BackgroundWithin the International Health Regulations framework, the French High Council for Public Health was mandated in 2022 by health authorities to establish a list of priority infectious diseases for public health, surveillance and research in mainland and overseas France.AimOur objective was to establish this list.MethodsA multi-criteria decision analysis was used, as recommended by the European Centre for Disease Prevention and Control.

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The HUSH epigenetic repressor complex silences PML nuclear body-associated HSV-1 quiescent genomes.

Proc Natl Acad Sci U S A

December 2024

Université Claude Bernard Lyon 1, Centre national de la recherche scientifique (CNRS) UMR 5261, Institut national de la santé et de la recherche médicale (Inserm) U1315, Laboratoire d'Excellence (LabEx) DEV2CAN, Institut NeuroMyoGène-Pathophysiology and Genetics of Neuron and Muscle (INMG-PGNM), team "Chromatin dynamics, Nuclear Domains, Virus", Lyon 69008, France.

Herpes simplex virus 1 (HSV-1) latently infected neurons display diverse patterns in the distribution of the viral genomes within the nucleus. A key pattern involves quiescent HSV-1 genomes sequestered in promyelocytic leukemia nuclear bodies (PML NBs) forming viral DNA-containing PML-NBs (vDCP NBs). Using a cellular model that replicates vDCP NB formation, we previously demonstrated that these viral genomes are chromatinized with the H3.

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Pathogen-pathogen interactions represent a critical but little-understood feature of infectious disease dynamics. In particular, experimental evidence suggests that influenza virus and respiratory syncytial virus (RSV) compete with each other, such that infection with one confers temporary protection against the other. However, such interactions are challenging to study using common epidemiologic methods.

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rVSVΔG-ZEBOV-GP and Ad26.ZEBOV, MVA-BN-Filo are WHO-prequalified vaccination regimens against Ebola virus disease (EVD). Challenges associated with measuring long-term clinical protection warrant the evaluation of immune response kinetics after vaccination.

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The mosquito-borne alphavirus o'nyong-nyong virus (ONNV) has proven its potential to cause major human outbreaks. On the African continent, ONNV causes unspecific febrile illness and co-circulates with the close relative chikungunya virus (CHIKV). The true scale of ONNV burden is poorly understood in Africa, because of the scarce availability of molecular in-house and commercial assays, strong cross-reactivity between ONNV and CHIKV in serological assays and a lack of surveillance.

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We estimated XBB.1.5 vaccine effectiveness (VE) against symptomatic SARS-CoV-2 infection among adults aged ≥ 65 years during the 2023/2024 JN.

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Article Synopsis
  • - cVDPV3s were found in wastewater samples in French Guiana between May and August 2024, indicating the detection of circulating type 3 vaccine-derived polioviruses.
  • - The oral polio vaccine isn’t used in the area, suggesting these polioviruses may have been imported or derived from a vaccine strain.
  • - This situation emphasizes the need for environmental monitoring to catch and eliminate any hidden poliovirus activity, which is vital for the global polio eradication effort.
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Article Synopsis
  • Yellow fever virus (YFV) is a disease prevalent in some regions of Africa and South America, and recent research suggests using urine as a diagnostic specimen may be beneficial alongside blood tests.
  • An extensive literature review found that urine tests showed a comparable detection rate of YFV to blood, with some differences in timing regarding when the virus can first and last be detected.
  • The study concludes that urine could be a valuable addition to YFV diagnostics, particularly for samples taken later in the infection process.
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Auto-Abs neutralizing type I IFNs in patients with severe Powassan, Usutu, or Ross River virus disease.

J Exp Med

December 2024

Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale (INSERM) U1163, Necker Hospital for Sick Children, Paris, France.

Arboviral diseases are a growing global health concern. Pre-existing autoantibodies (auto-Abs) neutralizing type I interferons (IFNs) can underlie encephalitis due to West Nile virus (WNV) (∼40% of patients) and tick-borne encephalitis (TBE, due to TBE virus [TBEV]) (∼10%). We report here that these auto-Abs can also underlie severe forms of rarer arboviral infections.

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Article Synopsis
  • A study conducted in France during the 2023-24 RSV season analyzed the effectiveness of nirsevimab, a monoclonal antibody, in preventing RSV infections in infants, focusing on breakthrough cases.
  • Out of 695 RSV-infected infants, researchers sequenced the full-length RSV genome of 545 infants, identifying that 48% had breakthrough infections despite receiving nirsevimab.
  • While no resistance was found in RSV-A infections from nirsevimab-treated infants, two cases of RSV-B showed substitutions linked to resistance, indicating a potential concern for the antibody's effectiveness against this variant.
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Article Synopsis
  • - First-generation monoclonal antibodies (mAbs) for COVID-19 were withdrawn due to resistance from Omicron variants, but two new mAbs, VYD222/Pemivibart and AZD3152/Sipavibart, were approved in 2024.
  • - Researchers tested these mAbs against contemporary JN.1 sublineages and found VYD222 still had moderate activity, but AZD3152 lost effectiveness against several variants.
  • - The study underscores the importance of monitoring VYD222's clinical performance and raises concerns about AZD3152's efficacy in treating infections from newer variants.
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Article Synopsis
  • * Recent analysis of dengue virus genomes from the French Caribbean revealed a mutation (NS4B:V91A) associated with reduced sensitivity to mosnodenvir, particularly in the DENV-2 strain, where sensitivity dropped by more than 1000 times.
  • * Phylogenetic analysis suggests that the low sensitivity due to the V91A mutation has re-emerged several times over the past 30 years in DENV-2 and DENV-3, highlighting the need for
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As multiple UN fora develop parallel rules for sharing benefits from digital sequence information, we urge better coordination. International policymakers should focus on harmonizing new benefit-sharing rules to ensure open access to data, database interoperability, and better benefit sharing outcomes.

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A specific domain within the 3' untranslated region of Usutu virus confers resistance to the exonuclease ISG20.

Nat Commun

October 2024

Viral Trafficking, Restriction and Innate Signaling, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, Montpellier, France.

Article Synopsis
  • Usutu virus (USUV) and West Nile virus (WNV) are mosquito-borne flaviviruses that primarily affect wild birds but can cause serious neurological issues in humans.
  • These viruses are suppressed by type I interferon (IFN), which hinders their replication and spread, but USUV shows a unique resistance to the ISG20 gene, which is involved in this suppression.
  • The study reveals that the USUV genome's resistance to ISG20 is due to a specific sequence in its 3' untranslated region, suggesting that this feature could potentially be transferred to other flaviviruses to help them evade host defenses.
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The molecular dissection of TRIM25's RNA-binding mechanism provides key insights into its antiviral activity.

Nat Commun

October 2024

Molecular Systems Biology Unit, European Molecular Biology Laboratory (EMBL) Heidelberg, 69117, Heidelberg, Germany.

TRIM25 is an RNA-binding ubiquitin E3 ligase with central but poorly understood roles in the innate immune response to RNA viruses. The link between TRIM25's RNA binding and its role in innate immunity has not been established. Thus, we utilized a multitude of biophysical techniques to identify key RNA-binding residues of TRIM25 and developed an RNA-binding deficient mutant (TRIM25-m9).

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Fatal case of imported visceral leishmaniasis in a dog caused by Leishmania infantum in French Guiana.

Vet Parasitol Reg Stud Reports

October 2024

Laboratoire Tropical Biome and ImmunoPathophysiology (TBIP), Université de Guyane, Cayenne, French Guiana; Université de Lille, CNRS, Inserm, Institut Pasteur de Lille, Centre Hospitalier Régional Universitaire de Lille, U1019-UMR9017-CIIL Centre d'Infection et d'Immunité de Lille, 59000 Lille, France. Electronic address:

Article Synopsis
  • - The report discusses a case of fatal canine visceral leishmaniasis (VL) in a 2-year-old pug from Brazil, which was imported to French Guiana, a region not typically associated with this disease.
  • - The dog initially showed a skin issue that healed, but later developed serious symptoms, leading to suspicion of VL, which was confirmed posthumously by testing for L. infantum.
  • - This case highlights the rarity of canine VL in French Guiana and suggests a need for increased local surveillance to monitor potential transmission routes of the parasite.
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