Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe

Abstract Background Ticks are significant vectors of pathogens, including viruses, bacteria, and protozoa. With approximately 900 tick species worldwide, many are expanding their geographical range due to changing socioeconomic and climate factors. The Danube Delta, one of Europe’s largest wetlands,...

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Main Authors: Bianca Elena Bratuleanu, Delphine Chretien, Thomas Bigot, Beatrice Regnault, Philippe Pérot, Gheorghe Savuta, Marc Eloit, Sarah Temmam
Format: Article
Language:English
Published: BMC 2024-11-01
Series:Parasites & Vectors
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Online Access:https://doi.org/10.1186/s13071-024-06557-2
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author Bianca Elena Bratuleanu
Delphine Chretien
Thomas Bigot
Beatrice Regnault
Philippe Pérot
Gheorghe Savuta
Marc Eloit
Sarah Temmam
author_facet Bianca Elena Bratuleanu
Delphine Chretien
Thomas Bigot
Beatrice Regnault
Philippe Pérot
Gheorghe Savuta
Marc Eloit
Sarah Temmam
author_sort Bianca Elena Bratuleanu
collection DOAJ
description Abstract Background Ticks are significant vectors of pathogens, including viruses, bacteria, and protozoa. With approximately 900 tick species worldwide, many are expanding their geographical range due to changing socioeconomic and climate factors. The Danube Delta, one of Europe’s largest wetlands, is an ecosystem that, despite its ecological importance, remains understudied concerning the risk of introducing new tick-borne viruses. This region serves as a critical habitat for migratory birds, which can carry ticks over long distances, potentially introducing exotic tick species and their pathogens into the local ecosystem. Hyalomma marginatum ticks, the primary vector of Crimean-Congo hemorrhagic fever virus (CCHFV), are of particular concern due to their expanding presence in Europe and potential to spread other arboviruses. In addition to being the primary vector for CCHFV, Hyalomma sp. ticks are capable of transmitting other pathogens of medical and veterinary importance, including Dugbe virus, West Nile virus, African horse sickness virus, and Kyasanur forest disease virus. Therefore, it is essential to monitor the presence of Hyalomma sp. ticks while simultaneously surveilling arbovirus circulation in tick populations to mitigate the risk of arboviral outbreaks. Methods In this work, we used an RNA sequencing technique to analyze the virome of H. marginatum ticks collected from the Danube Delta Biosphere Reserve, Romania, one of the major bird migration hubs from Africa to Europe. Results Among the viral taxa detected in H. marginatum ticks, sequences belonging to Volzhskoe tick virus (VTV), Balambala tick virus (BMTV) and Bole tick virus 4 (BTV4) were identified. In addition, we report the first identification of a novel Rhabdoviridae-related virus, Hyalomma marginatum rhabdovirus (HMRV). No CCHFV or any CCHFV-related nairovirus were detected in this study. Conclusions To summarize, detecting new viruses is essential for monitoring potential viral outbreaks. Our research expands the understanding of virus diversity in Eastern Europe, including the identification of novel viruses. This insight is crucial for monitoring viruses that may pose risks to both animal and human health, such as CCHFV. Graphical Abstract
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spelling doaj-art-ace4dd48df8b4148995876c7fca4a4592025-08-20T02:32:49ZengBMCParasites & Vectors1756-33052024-11-0117111010.1186/s13071-024-06557-2Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern EuropeBianca Elena Bratuleanu0Delphine Chretien1Thomas Bigot2Beatrice Regnault3Philippe Pérot4Gheorghe Savuta5Marc Eloit6Sarah Temmam7Regional Center of Advanced Research for Emerging Diseases, Zoonoses and Food Safety, “Ion Ionescu de La Brad” Iasi University of Life SciencesPathogen Discovery Laboratory, Institut Pasteur, Université Paris CitéPathogen Discovery Laboratory, Institut Pasteur, Université Paris CitéPathogen Discovery Laboratory, Institut Pasteur, Université Paris CitéPathogen Discovery Laboratory, Institut Pasteur, Université Paris CitéRegional Center of Advanced Research for Emerging Diseases, Zoonoses and Food Safety, “Ion Ionescu de La Brad” Iasi University of Life SciencesPathogen Discovery Laboratory, Institut Pasteur, Université Paris CitéPathogen Discovery Laboratory, Institut Pasteur, Université Paris CitéAbstract Background Ticks are significant vectors of pathogens, including viruses, bacteria, and protozoa. With approximately 900 tick species worldwide, many are expanding their geographical range due to changing socioeconomic and climate factors. The Danube Delta, one of Europe’s largest wetlands, is an ecosystem that, despite its ecological importance, remains understudied concerning the risk of introducing new tick-borne viruses. This region serves as a critical habitat for migratory birds, which can carry ticks over long distances, potentially introducing exotic tick species and their pathogens into the local ecosystem. Hyalomma marginatum ticks, the primary vector of Crimean-Congo hemorrhagic fever virus (CCHFV), are of particular concern due to their expanding presence in Europe and potential to spread other arboviruses. In addition to being the primary vector for CCHFV, Hyalomma sp. ticks are capable of transmitting other pathogens of medical and veterinary importance, including Dugbe virus, West Nile virus, African horse sickness virus, and Kyasanur forest disease virus. Therefore, it is essential to monitor the presence of Hyalomma sp. ticks while simultaneously surveilling arbovirus circulation in tick populations to mitigate the risk of arboviral outbreaks. Methods In this work, we used an RNA sequencing technique to analyze the virome of H. marginatum ticks collected from the Danube Delta Biosphere Reserve, Romania, one of the major bird migration hubs from Africa to Europe. Results Among the viral taxa detected in H. marginatum ticks, sequences belonging to Volzhskoe tick virus (VTV), Balambala tick virus (BMTV) and Bole tick virus 4 (BTV4) were identified. In addition, we report the first identification of a novel Rhabdoviridae-related virus, Hyalomma marginatum rhabdovirus (HMRV). No CCHFV or any CCHFV-related nairovirus were detected in this study. Conclusions To summarize, detecting new viruses is essential for monitoring potential viral outbreaks. Our research expands the understanding of virus diversity in Eastern Europe, including the identification of novel viruses. This insight is crucial for monitoring viruses that may pose risks to both animal and human health, such as CCHFV. Graphical Abstracthttps://doi.org/10.1186/s13071-024-06557-2ViromeTicksHyalomma marginatumArbovirusesRomaniaSurveillance
spellingShingle Bianca Elena Bratuleanu
Delphine Chretien
Thomas Bigot
Beatrice Regnault
Philippe Pérot
Gheorghe Savuta
Marc Eloit
Sarah Temmam
Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe
Parasites & Vectors
Virome
Ticks
Hyalomma marginatum
Arboviruses
Romania
Surveillance
title Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe
title_full Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe
title_fullStr Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe
title_full_unstemmed Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe
title_short Insights into the virome of Hyalomma marginatum in the Danube Delta: a major vector of Crimean-Congo hemorrhagic fever virus in Eastern Europe
title_sort insights into the virome of hyalomma marginatum in the danube delta a major vector of crimean congo hemorrhagic fever virus in eastern europe
topic Virome
Ticks
Hyalomma marginatum
Arboviruses
Romania
Surveillance
url https://doi.org/10.1186/s13071-024-06557-2
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