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O’Connor TW, Hick PM, Finlaison DS, Kirkland PD, Toribio JAL. Revisiting the Importance of Orthobunyaviruses for Animal Health: A Scoping Review of Livestock Disease, Diagnostic Tests, and Surveillance Strategies for the Simbu Serogroup. Viruses 2024; 16:294. [PMID: 38400069 PMCID: PMC10892073 DOI: 10.3390/v16020294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/07/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024] Open
Abstract
Orthobunyaviruses (order Bunyavirales, family Peribunyaviridae) in the Simbu serogroup have been responsible for widespread epidemics of congenital disease in ruminants. Australia has a national program to monitor arboviruses of veterinary importance. While monitoring for Akabane virus, a novel orthobunyavirus was detected. To inform the priority that should be given to this detection, a scoping review was undertaken to (1) characterise the associated disease presentations and establish which of the Simbu group viruses are of veterinary importance; (2) examine the diagnostic assays that have undergone development and validation for this group of viruses; and (3) describe the methods used to monitor the distribution of these viruses. Two search strategies identified 224 peer-reviewed publications for 33 viruses in the serogroup. Viruses in this group may cause severe animal health impacts, but only those phylogenetically arranged in clade B are associated with animal disease. Six viruses (Akabane, Schmallenberg, Aino, Shuni, Peaton, and Shamonda) were associated with congenital malformations, neurological signs, and reproductive disease. Diagnostic test interpretation is complicated by cross-reactivity, the timing of foetal immunocompetence, and sample type. Serological testing in surveys remains a mainstay of the methods used to monitor the distribution of SGVs. Given significant differences in survey designs, only broad mean seroprevalence estimates could be provided. Further research is required to determine the disease risk posed by novel orthobunyaviruses and how they could challenge current diagnostic and surveillance capabilities.
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Affiliation(s)
- Tiffany W. O’Connor
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia;
- Virology Laboratory, Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia; (P.M.H.); (D.S.F.); (P.D.K.)
| | - Paul M. Hick
- Virology Laboratory, Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia; (P.M.H.); (D.S.F.); (P.D.K.)
| | - Deborah S. Finlaison
- Virology Laboratory, Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia; (P.M.H.); (D.S.F.); (P.D.K.)
| | - Peter D. Kirkland
- Virology Laboratory, Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia; (P.M.H.); (D.S.F.); (P.D.K.)
| | - Jenny-Ann L.M.L. Toribio
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia;
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Edridge AWD, van den Brekel N, Mukungu P, Nakayima R, Bbosa S, Isagara P, van Boele Hensbroek M, van der Hoek L, Kayiwa J, Lutwama JJ, Idro R. No Evidence of Ntwetwe Virus Infections in Children Presenting to Kiboga Hospital, Uganda. Trop Med Infect Dis 2022; 8:21. [PMID: 36668928 DOI: 10.3390/tropicalmed8010021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/27/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
We investigated whether Ntwetwe virus-a novel orthobunyavirus discovered in a Ugandan girl with a fatal encephalopathy-was a common reason for hospital admission for children to Kiboga hospital, Uganda. A case-control was conducted between September 2019 and September 2020, including cases with severe neurological disease and mild febrile illness, matched to a healthy control without fever. Among 143 subjects, no cases with an acute infection were identified. This result suggests that Ntwetwe virus does not cause a major burden of disease amongst children presenting to Kiboga hospital during the study period.
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Omoga DCA, Tchouassi DP, Venter M, Ogola EO, Eibner GJ, Kopp A, Slothouwer I, Torto B, Junglen S, Sang R. Circulation of Ngari Virus in Livestock, Kenya. mSphere 2022; 7:e0041622. [PMID: 36472449 DOI: 10.1128/msphere.00416-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Ngari virus (NRIV) is a mosquito-borne reassortant orthobunyavirus that causes severe febrile illness and hemorrhagic fever in humans and small ruminants. Due to limited diagnostics and surveillance, NRIV has only been detected sporadically during Rift Valley fever virus outbreaks. Little is known on its interepidemic maintenance and geographic distribution. In this study, sera from cattle, goats, and sheep were collected through a cross-sectional survey after the rainy seasons between 2020 and 2021 in two pastoralist-dominated semiarid ecosystems, Baringo and Kajiado counties in Kenya. NRIV was detected in 11 apparently healthy animals (11/2,039, 0.54%) by RT-PCR and isolated in cell culture from seven individuals. Growth analyses displayed efficient replication in cells from sheep and humans in contrast to weak replication in goat cells. NRIV infection of a wide variety of different vector cells showed only rapid replication in Aedes albopictus cells but not in cells derived from other mosquito species or sandflies. Phylogenetic analyses of complete-coding sequences of L, M, and S segments of four viruses showed that the Kenyan sequences established a monophyletic clade most closely related to a NRIV sequence from a small ruminant from Mauritania. NRIV neutralizing reactivity in cattle, goats, and sheep were 41.6% (95% CI = 30 to 54.3), 52.4% (95% CI = 37.7 to 66.6), and 19% (95% CI = 9.7 to 33.6), respectively. This is the first detection of NRIV in livestock in Kenya. Our results demonstrate active and undetected circulation of NRIV in the three most common livestock species highlighting the need for an active one-health surveillance of host networks, including humans, livestock, and vectors. IMPORTANCE Surveillance of vectors and hosts for infection with zoonotic arthropod-borne viruses is important for early detection and intervention measures to prevent outbreaks. Here, we report the undetected circulation of Ngari virus (NRIV) in apparently healthy cattle, sheep, and goats in Kenya. NRIV is associated with outbreaks of hemorrhagic fever in humans and small ruminants. We demonstrate the isolation of infectious virus from several animals as well as presence of neutralizing antibodies in 38% of the tested animals. Our data indicate active virus circulation and endemicity likely having important implications for human and animal health.
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Walsh E, Torres TZB, Rückert C. Culex Mosquito Piwi4 Is Antiviral against Two Negative-Sense RNA Viruses. Viruses 2022; 14. [PMID: 36560761 DOI: 10.3390/v14122758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
Culex spp. mosquitoes transmit several pathogens concerning public health, including West Nile virus and Saint Louis encephalitis virus. Understanding the antiviral immune system of Culex spp. mosquitoes is important for reducing the transmission of these viruses. Mosquitoes rely on RNA interference (RNAi) to control viral replication. While the siRNA pathway in mosquitoes is heavily studied, less is known about the piRNA pathway. The piRNA pathway in mosquitoes has recently been connected to mosquito antiviral immunity. In Aedes aegypti, Piwi4 has been implicated in antiviral responses. The antiviral role of the piRNA pathway in Culex spp. mosquitoes is understudied compared to Ae. aegypti. Here, we aimed to identify the role of PIWI genes and piRNAs in Culex quinquefasciatus and Culex tarsalis cells during virus infection. We examined the effect of PIWI gene silencing on virus replication of two arboviruses and three insect-specific viruses in Cx. quinquefasciatus derived cells (Hsu) and Cx. tarsalis derived (CT) cells. We show that Piwi4 is antiviral against the La Crosse orthobunyavirus (LACV) in Hsu and CT cells, and the insect-specific rhabdovirus Merida virus (MERDV) in Hsu cells. None of the silenced PIWI genes impacted replication of the two flaviviruses Usutu virus (USUV) and Calbertado virus, or the phasivirus Phasi-Charoen-like virus. We further used small RNA sequencing to determine that LACV-derived piRNAs, but not USUV-derived piRNAs were generated in Hsu cells and that PIWI gene silencing resulted in a small reduction in vpiRNAs. Finally, we determined that LACV-derived DNA was produced in Hsu cells during infection, but whether this viral DNA is required for vpiRNA production remains unclear. Overall, we expanded our knowledge on the piRNA pathway and how it relates to the antiviral response in Culex spp mosquitoes.
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Hopkins FR, Álvarez-Rodríguez B, Heath GR, Panayi K, Hover S, Edwards TA, Barr JN, Fontana J. The Native Orthobunyavirus Ribonucleoprotein Possesses a Helical Architecture. mBio 2022; 13:e0140522. [PMID: 35762594 PMCID: PMC9426602 DOI: 10.1128/mbio.01405-22] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The Bunyavirales order is the largest group of negative-sense RNA viruses, containing many lethal human pathogens for which approved anti-infective measures are not available. The bunyavirus genome consists of multiple negative-sense RNA segments enwrapped by the virus-encoded nucleocapsid protein (NP), which together with the viral polymerase form ribonucleoproteins (RNPs). RNPs represent substrates for RNA synthesis and virion assembly, which require inherent flexibility, consistent with the appearance of RNPs spilled from virions. These observations have resulted in conflicting models describing the overall RNP architecture. Here, we purified RNPs from Bunyamwera virus (BUNV), the prototypical orthobunyavirus. The lengths of purified RNPs imaged by negative staining resulted in 3 populations of RNPs, suggesting that RNPs possess a consistent method of condensation. Employing microscopy approaches, we conclusively show that the NP portion of BUNV RNPs is helical. Furthermore, we present a pseudo-atomic model for this portion based on a cryo-electron microscopy average at 13 Å resolution, which allowed us to fit the BUNV NP crystal structure by molecular dynamics. This model was confirmed by NP mutagenesis using a mini-genome system. The model shows that adjacent NP monomers in the RNP chain interact laterally through flexible N- and C-terminal arms only, with no longitudinal helix-stabilizing interactions, thus providing a potential model for the molecular basis for RNP flexibility. Excessive RNase treatment disrupts native RNPs, suggesting that RNA was key in maintaining the RNP structure. Overall, this work will inform studies on bunyaviral RNP assembly, packaging, and RNA replication, and aid in future antiviral strategies. IMPORTANCE Bunyaviruses are emerging RNA viruses that cause significant disease and economic burden and for which vaccines or therapies approved for humans are not available. The bunyavirus genome is wrapped up by the nucleoprotein (NP) and interacts with the viral polymerase, forming a ribonucleoprotein (RNP). This is the only form of the genome active for viral replication and assembly. However, until now how NPs are organized within an RNP was not known for any orthobunyavirus. Here, we purified RNPs from the prototypical orthobunyavirus, Bunyamwera virus, and employed microscopy approaches to show that the NP portion of the RNP was helical. We then combined our helical average with the known structure of an NP monomer, generating a pseudo-atomic model of this region. This arrangement allowed the RNPs to be highly flexible, which was critical for several stages of the viral replication cycle, such as segment circularization.
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Affiliation(s)
- Francis R. Hopkins
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - Beatriz Álvarez-Rodríguez
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - George R. Heath
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
- School of Physics and Astronomy, Faculty of Engineering and Physical Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - Kyriakoulla Panayi
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - Samantha Hover
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - Thomas A. Edwards
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - John N. Barr
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
| | - Juan Fontana
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leedsgrid.9909.9, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leedsgrid.9909.9, Leeds, United Kingdom
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Hollidge BS, Salzano MV, Ibrahim JM, Fraser JW, Wagner V, Leitner NE, Weiss SR, Weber F, González-Scarano F, Soldan SS. Targeted Mutations in the Fusion Peptide Region of La Crosse Virus Attenuate Neuroinvasion and Confer Protection against Encephalitis. Viruses 2022; 14:1464. [PMID: 35891445 PMCID: PMC9317099 DOI: 10.3390/v14071464] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/25/2022] [Accepted: 06/29/2022] [Indexed: 02/06/2023] Open
Abstract
La Crosse virus (LACV) is a major cause of pediatric encephalitis and aseptic meningitis in the Midwestern, Mid-Atlantic, and Southern United States, where it is an emerging pathogen. The LACV Gc glycoprotein plays a critical role in the neuropathogenesis of LACV encephalitis as the putative virus attachment protein. Previously, we identified and experimentally confirmed the location of the LACV fusion peptide within Gc and generated a panel of recombinant LACVs (rLACVs) containing mutations in the fusion peptide as well as the wild-type sequence. These rLACVs retained their ability to cause neuronal death in a primary embryonic rat neuronal culture system, despite decreased replication and fusion phenotypes. To test the role of the fusion peptide in vivo, we tested rLACVs in an age-dependent murine model of LACV encephalitis. When inoculated directly into the CNS of young adult mice (P28), the rLACV fusion peptide mutants were as neurovirulent as the rLACV engineered with a wild-type sequence, confirming the results obtained in tissue culture. In contrast, the fusion peptide mutant rLACVs were less neuroinvasive when suckling (P3) or weanling (P21) mice were inoculated peripherally, demonstrating that the LACV fusion peptide is a determinant of neuroinvasion, but not of neurovirulence. In a challenge experiment, we found that peripheral challenge of weanling (P21) mice with fusion peptide mutant rLACVs protected from a subsequent WT-LACV challenge, suggesting that mutations in the fusion peptide are an attractive target for generating live-attenuated virus vaccines. Importantly, the high degree of conservation of the fusion peptide amongst the Bunyavirales and, structurally, other arboviruses suggests that these findings are broadly applicable to viruses that use a class II fusion mechanism and cause neurologic disease.
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Affiliation(s)
- Bradley S. Hollidge
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
- Neuroscience Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Mary-Virginia Salzano
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
| | - John M. Ibrahim
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
| | - Jonathan W. Fraser
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
| | - Valentina Wagner
- Abteilung Virologie, Institut für Medizinische Mikrobiologie und Hygiene, Universität Freiburg, 79008 Freiburg, Germany; (V.W.); (F.W.)
| | - Nicole E. Leitner
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
| | - Susan R. Weiss
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
| | - Friedemann Weber
- Abteilung Virologie, Institut für Medizinische Mikrobiologie und Hygiene, Universität Freiburg, 79008 Freiburg, Germany; (V.W.); (F.W.)
- Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, 35392 Giessen, Germany
| | - Francisco González-Scarano
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
| | - Samantha S. Soldan
- Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA; (B.S.H.); (M.-V.S.); (J.M.I.); (J.W.F.); (N.E.L.); (S.R.W.); (F.G.-S.)
- The Wistar Institute, Philadelphia, PA 19104, USA
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Windhaber S, Xin Q, Uckeley ZM, Koch J, Obr M, Garnier C, Luengo-Guyonnot C, Duboeuf M, Schur FKM, Lozach PY. The Orthobunyavirus Germiston Enters Host Cells from Late Endosomes. J Virol 2022; 96:e0214621. [PMID: 35019710 PMCID: PMC8906410 DOI: 10.1128/jvi.02146-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/03/2022] [Indexed: 01/01/2023] Open
Abstract
With more than 80 members worldwide, the Orthobunyavirus genus in the Peribunyaviridae family is a large genus of enveloped RNA viruses, many of which are emerging pathogens in humans and livestock. How orthobunyaviruses (OBVs) penetrate and infect mammalian host cells remains poorly characterized. Here, we investigated the entry mechanisms of the OBV Germiston (GERV). Viral particles were visualized by cryo-electron microscopy and appeared roughly spherical with an average diameter of 98 nm. Labeling of the virus with fluorescent dyes did not adversely affect its infectivity and allowed the monitoring of single particles in fixed and live cells. Using this approach, we found that endocytic internalization of bound viruses was asynchronous and occurred within 30 to 40 min. The virus entered Rab5a-positive (Rab5a+) early endosomes and, subsequently, late endosomal vacuoles containing Rab7a but not LAMP-1. Infectious entry did not require proteolytic cleavage, and endosomal acidification was sufficient and necessary for viral fusion. Acid-activated penetration began 15 to 25 min after initiation of virus internalization and relied on maturation of early endosomes to late endosomes. The optimal pH for viral membrane fusion was slightly below 6.0, and penetration was hampered when the potassium influx was abolished. Overall, our study provides real-time visualization of GERV entry into host cells and demonstrates the importance of late endosomal maturation in facilitating OBV penetration. IMPORTANCE Orthobunyaviruses (OBVs), which include La Crosse, Oropouche, and Schmallenberg viruses, represent a growing threat to humans and domestic animals worldwide. Ideally, preventing OBV spread requires approaches that target early stages of infection, i.e., virus entry. However, little is known about the molecular and cellular mechanisms by which OBVs enter and infect host cells. Here, we developed accurate, sensitive tools and assays to investigate the penetration process of GERV. Our data emphasize the central role of late endosomal maturation in GERV entry, providing a comprehensive overview of the early stages of an OBV infection. Our study also brings a complete toolbox of innovative methods to study each step of the OBV entry program in fixed and living cells, from virus binding and endocytosis to fusion and penetration. The information gained herein lays the foundation for the development of antiviral strategies aiming to block OBV entry.
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Affiliation(s)
- Stefan Windhaber
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Qilin Xin
- University of Lyon, INRAE, EPHE, IVPC, Lyon, France
| | - Zina M. Uckeley
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Jana Koch
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Martin Obr
- Institute of Science and Technology Austria, Klosterneuburg, Austria
| | | | | | | | | | - Pierre-Yves Lozach
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
- University of Lyon, INRAE, EPHE, IVPC, Lyon, France
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Laredo-Tiscareño SV, Garza-Hernandez JA, Rodríguez-Alarcón CA, Adame-Gallegos JR, Beristain-Ruiz DM, Barajas-López IN, González-Peña R, Baylon-Jaquez D, Camacho-Perea A, Vega-Durán A, Rubio-Tabares E, Rivera-Barreno R, Montelongo-Ponce C, Tangudu CS, Blitvich BJ. Detection of Antibodies to Lokern, Main Drain, St. Louis Encephalitis, and West Nile Viruses in Vertebrate Animals in Chihuahua, Guerrero, and Michoacán, Mexico. Vector Borne Zoonotic Dis 2021; 21:884-891. [PMID: 34652234 DOI: 10.1089/vbz.2021.0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We conducted serologic surveillance for flaviviruses and orthobunyaviruses in vertebrate animals in Mexico in 2018-2019. Sera were collected from 856 vertebrate animals, including 323 dogs, 223 horses, and 121 cows, from 16 species. The animals were from 3 states: Chihuahua in northwest Mexico (704 animals) and Guerrero and Michoacán on the Pacific Coast (27 and 125 animals, respectively). Sera were assayed by plaque reduction neutralization test using four flaviviruses (dengue type 2, St. Louis encephalitis, West Nile, and Zika viruses) and six orthobunyaviruses from the Bunyamwera (BUN) serogroup (Cache Valley, Lokern, Main Drain, Northway, Potosi, and Tensaw viruses). Antibodies to West Nile virus (WNV) were detected in 154 animals of 9 species, including 89 (39.9%) horses, 3 (21.4%) Indian peafowl, and 41 (12.7%) dogs. Antibodies to St. Louis encephalitis virus (SLEV) were detected in seven animals, including three (0.9%) dogs. Antibodies to Lokern virus (LOKV) were detected in 22 animals: 19 (8.5%) horses, 2 (1.7%) cows, and a dog (0.3%). Antibodies to Main Drain virus (MDV) were detected in three (1.3%) horses. WNV and LOKV activity was detected in all three states, SLEV activity was detected in Chihuahua and Michoacán, and MDV activity was detected in Chihuahua. None of the animals was seropositive for Cache Valley virus, the most common and widely distributed BUN serogroup virus in North America. In conclusion, we provide serologic evidence that select flaviviruses and BUN serogroup viruses infect vertebrate animals in Chihuahua, Guerrero, and Michoacán. We also provide the first evidence of LOKV and MDV activity in Mexico.
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Affiliation(s)
| | - Javier A Garza-Hernandez
- Departamento de Ciencias Químico Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | - Carlos A Rodríguez-Alarcón
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | | | - Diana M Beristain-Ruiz
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | | | | | - David Baylon-Jaquez
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | - Adriana Camacho-Perea
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, México
| | - Alfonso Vega-Durán
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | - Ezequiel Rubio-Tabares
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | - Ramón Rivera-Barreno
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | - Carolina Montelongo-Ponce
- Departamento de Ciencias Veterinarias, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, México
| | - Chandra S Tangudu
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Bradley J Blitvich
- Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
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Neill WA, Kading RC. Viral Ecology and Natural Infection Dynamics of Kaeng Khoi Virus in Cave-Dwelling Wrinkle-Lipped Free-Tailed Bats ( Chaerephon plicatus) in Thailand. Diseases 2021; 9:73. [PMID: 34698148 DOI: 10.3390/diseases9040073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/28/2021] [Accepted: 10/12/2021] [Indexed: 11/16/2022] Open
Abstract
Kaeng Khoi virus (KKV; Order: Bunyavirales), is an endemic viral infection of the wrinkle-lipped free-tailed bat (Chaerephon plicatus aka Tadarida plicata plicata). Little is known about the ecology and maintenance of KKV within the bat population, nor the infection dynamics and transmission among bats or between bats and other vertebrates. Therefore, KKV was studied in Kaeng Khoi cave, Saraburi province, Thailand, during 1973–1974 with the objectives to (1) characterize the seasonal infection rates of KKV in the context of the bat population ecology, and (2) describe the infection dynamics and viral shedding by naturally- and experimentally-infected bats. To this end, the free-tailed bat population was estimated by a series of timed photographs taken during the evening exodus. The case population of 900,000 adult bats doubled at the time of weaning of the young and returned to its previous level soon thereafter. The newborn bats had neutralizing antibodies to KKV that were likely to be maternal in origin. The KKV antibody prevalence in adult bats was high (69–91%) in March–May and low (29–40%) in August and September. Kaeng Khoi virus was isolated from 75% of dead and 50% of moribund bats, but was not found in nearly 400 apparently healthy bats. Virus was present in saliva, urine and blood of most of the naturally-moribund bats tested. Consistent with observations from naturally-infected bats, experimental infection of bats with KKV revealed significant liver pathology, also suggestive that this is not a benign infection. Kaeng Khoi virus is an endemic, year-round infection maintained by the annual recruitment of a large number of immunologically-naïve juvenile bats. Moreover, it produces an acute infection in the bat, either leading to death by hepatitis, or immunity.
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10
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López K, Wilson SN, Coutermash-Ott S, Tanelus M, Stone WB, Porier DL, Auguste DI, Muller JA, Allicock OM, Paulson SL, Erasmus JH, Auguste AJ. Novel murine models for studying Cache Valley virus pathogenesis and in utero transmission. Emerg Microbes Infect 2021; 10:1649-1659. [PMID: 34353229 PMCID: PMC8381923 DOI: 10.1080/22221751.2021.1965497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cache Valley virus (CVV) is a prevalent emerging pathogen of significant importance to agricultural and human health in North America. Emergence in livestock can result in substantial agroeconomic losses resulting from the severe embryonic lethality associated with infection during pregnancy. Although CVV pathogenesis has been well described in ruminants, small animal models are still unavailable, which limits our ability to study its pathogenesis and perform preclinical testing of therapeutics. Herein, we explored CVV pathogenesis, tissue tropism, and disease outcomes in a variety of murine models, including immune -competent and -compromised animals. Our results show that development of CVV disease in mice is dependent on innate immune responses, and type I interferon signalling is essential for preventing infection in mice. IFN-αβR-/- mice infected with CVV present with significant disease and lethal infections, with minimal differences in age-dependent pathogenesis, suggesting this model is appropriate for pathogenesis-related, and short- and long-term therapeutic studies. We also developed a novel CVV in utero transmission model that showed high rates of transmission, spontaneous abortions, and congenital malformations during infection. CVV infection presents a wide tissue tropism, with significant amplification in liver, spleen, and placenta tissues. Immune-competent mice are generally resistant to infection, and only show disease in an age dependent manner. Given the high seropositivity rates in regions of North America, and the continuing geographic expansion of competent mosquito vectors, the risk of epidemic and epizootic emergence of CVV is high, and interventions are needed for this important pathogen.
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Affiliation(s)
- Krisangel López
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Sarah N Wilson
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Sheryl Coutermash-Ott
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD College of Veterinary Medicine, Blacksburg, VA, USA
| | - Manette Tanelus
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - William B Stone
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Danielle L Porier
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Dawn I Auguste
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - John A Muller
- Department of Biology, University of Oklahoma, Norman, OK, USA
| | - Orchid M Allicock
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Sally L Paulson
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | | | - Albert J Auguste
- Department of Entomology, College of Agriculture and Life Sciences, Fralin Life Science Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.,Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
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11
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Pérot P, Bielle F, Bigot T, Foulongne V, Bolloré K, Chrétien D, Gil P, Gutiérrez S, L'Ambert G, Mokhtari K, Hellert J, Flamand M, Tamietti C, Coulpier M, Huard de Verneuil A, Temmam S, Couderc T, De Sousa Cunha E, Boluda S, Plu I, Delisle MB, Bonneville F, Brassat D, Fieschi C, Malphettes M, Duyckaerts C, Mathon B, Demeret S, Seilhean D, Eloit M. Identification of Umbre Orthobunyavirus as a Novel Zoonotic Virus Responsible for Lethal Encephalitis in 2 French Patients with Hypogammaglobulinemia. Clin Infect Dis 2021; 72:1701-1708. [PMID: 32516409 DOI: 10.1093/cid/ciaa308] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/18/2020] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Human encephalitis represents a medical challenge from a diagnostic and therapeutic point of view. We investigated the cause of 2 fatal cases of encephalitis of unknown origin in immunocompromised patients. METHODS Untargeted metatranscriptomics was applied on the brain tissue of 2 patients to search for pathogens (viruses, bacteria, fungi, or protozoans) without a prior hypothesis. RESULTS Umbre arbovirus, an orthobunyavirus never previously identified in humans, was found in 2 patients. In situ hybridization and reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR) showed that Umbre virus infected neurons and replicated at high titers. The virus was not detected in cerebrospinal fluid by RT-qPCR. Viral sequences related to Koongol virus, another orthobunyavirus close to Umbre virus, were found in Culex pipiens mosquitoes captured in the south of France where the patients had spent some time before the onset of symptoms, demonstrating the presence of the same clade of arboviruses in Europe and their potential public health impact. A serological survey conducted in the same area did not identify individuals positive for Umbre virus. The absence of seropositivity in the population may not reflect the actual risk of disease transmission in immunocompromised individuals. CONCLUSIONS Umbre arbovirus can cause encephalitis in immunocompromised humans and is present in Europe.
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Affiliation(s)
- Philippe Pérot
- Pathogen Discovery Laboratory, Institut Pasteur, Paris, France
| | - Franck Bielle
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France
| | - Thomas Bigot
- Hub de Bioinformatique et Biostatistique - Département Biologie Computationnelle, Institut Pasteur, Unité de Service et de Recherche 3756 CNRS, Paris, France
| | - Vincent Foulongne
- Pathogenesis and Control of Chronic Infections, INSERM, University of Montpellier, Etablissement Français du Sang, Centre Hospitalier Universitaire (CHU) Montpellier, Montpellier, France
| | - Karine Bolloré
- Pathogenesis and Control of Chronic Infections, INSERM, University of Montpellier, Etablissement Français du Sang, Centre Hospitalier Universitaire (CHU) Montpellier, Montpellier, France
| | | | - Patricia Gil
- Centre de Coopération Internationale en Recherche Agronomique Pour le Développement (CIRAD), UMR ASTRE, Montpellier, France.,ASTRE, CIRAD, Institut National de la Recherche Agronomique, University of Montpellier, Montpellier, France
| | - Serafín Gutiérrez
- Centre de Coopération Internationale en Recherche Agronomique Pour le Développement (CIRAD), UMR ASTRE, Montpellier, France.,ASTRE, CIRAD, Institut National de la Recherche Agronomique, University of Montpellier, Montpellier, France
| | - Grégory L'Ambert
- Entente Interdépartementale Pour la Démoustication Méditerranée, Montpellier, France
| | - Karima Mokhtari
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France
| | - Jan Hellert
- Structural Virology Unit, Institut Pasteur, CNRS UMR 3569, Paris, France
| | - Marie Flamand
- Structural Virology Unit, Institut Pasteur, CNRS UMR 3569, Paris, France
| | - Carole Tamietti
- Structural Virology Unit, Institut Pasteur, CNRS UMR 3569, Paris, France
| | - Muriel Coulpier
- UMR Virologie, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, École Nationale Vétérinaire d'Alfort, Institut National de Recherche Pour l'Agriculture, l'Alimentation et l'Environnement, Université Paris Est, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Anne Huard de Verneuil
- UMR Virologie, Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail, École Nationale Vétérinaire d'Alfort, Institut National de Recherche Pour l'Agriculture, l'Alimentation et l'Environnement, Université Paris Est, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Sarah Temmam
- Pathogen Discovery Laboratory, Institut Pasteur, Paris, France
| | - Thérèse Couderc
- Biology of Infection Unit, Institut Pasteur, INSERM U1117, Paris, France
| | - Edouard De Sousa Cunha
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Susana Boluda
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France.,Centre National de Référence des Agents Transmissibles Non Conventionnels (Reference Center for Nonconventional Transmissible Agents), Laboratory and Neuropathology Network for the Surveillance of Creutzfeldt-Jakob Disease, Santé Publique France, AP-HP, Paris, France
| | - Isabelle Plu
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France.,Centre National de Référence des Agents Transmissibles Non Conventionnels (Reference Center for Nonconventional Transmissible Agents), Laboratory and Neuropathology Network for the Surveillance of Creutzfeldt-Jakob Disease, Santé Publique France, AP-HP, Paris, France
| | - Marie Bernadette Delisle
- Laboratoire de Neuropathologie, Laboratoire Universitaire d'Anatomie et Cytologie Pathologiques, CHU de Toulouse, Université Toulouse III-Paul Sabatier, Toulouse, France
| | - Fabrice Bonneville
- Department of Neuroradiology, CHU de Toulouse and UMR 1214 Toulouse NeuroImaging Center, Université de Toulouse, INSERM, Toulouse, France
| | - David Brassat
- Centre de Ressources et de Compétences Sclérose en Plaques, Pole des Neurosciences CHU Toulouse and UMR 1043, Université de Toulouse III, Toulouse, France
| | - Claire Fieschi
- Service d'Immunologie Clinique, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université de Paris, Paris, France
| | - Marion Malphettes
- Service d'Immunologie Clinique, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université de Paris, Paris, France
| | - Charles Duyckaerts
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France
| | - Bertrand Mathon
- Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France.,AP-HP, Hôpitaux Universitaires Pitié-Salpêtrière Charles-Foix, Department of Neurosurgery, Paris, France
| | - Sophie Demeret
- Department of Neurology, Neuro ICU, Groupe Hospitalier Pitié-Salpêtrière, AP-HP, Paris, France
| | - Danielle Seilhean
- Département de Neuropathologie Raymond Escourolle, Assistance Publique - Hôpitaux de Paris (AP-HP)-Sorbonne, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Université, Brain Institute (Institut du Cerveau et de la Moelle épinière; Institut National de la Santé et de la Recherche Médicale [INSERM], Unité Mixte de Recherche Santé 1127; Centre National de la Recherche Scientifique [CNRS], Unité Mixte de Recherche [UMR] 7225), Paris, France.,Centre National de Référence des Agents Transmissibles Non Conventionnels (Reference Center for Nonconventional Transmissible Agents), Laboratory and Neuropathology Network for the Surveillance of Creutzfeldt-Jakob Disease, Santé Publique France, AP-HP, Paris, France
| | - Marc Eloit
- Pathogen Discovery Laboratory, Institut Pasteur, Paris, France.,Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
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12
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Steyn J, Motlou P, van Eeden C, Pretorius M, Stivaktas VI, Williams J, Snyman LP, Buss PE, Beechler B, Jolles A, Perez-Martin E, Myburgh JG, Steyl J, Venter M. Shuni Virus in Wildlife and Nonequine Domestic Animals, South Africa. Emerg Infect Dis 2021; 26:1521-1525. [PMID: 32568048 PMCID: PMC7323521 DOI: 10.3201/eid2607.190770] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We screened nonequine animals with unexplained neurologic signs or death in South Africa during 2010-2018 for Shuni virus (SHUV). SHUV was detected in 3.3% of wildlife, 1.1% of domestic, and 2.0% of avian species. Seropositivity was also demonstrated in wildlife. These results suggest a range of possible SHUV hosts in Africa.
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13
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Rodriguez C, Gricourt G, Ndebi M, Demontant V, Poiteau L, Burrel S, Boutolleau D, Woerther PL, Calvez V, Stroer S, Pawlotsky JM. Fatal Encephalitis Caused by Cristoli Virus, an Emerging Orthobunyavirus, France. Emerg Infect Dis 2021; 26:1287-1290. [PMID: 32441621 PMCID: PMC7258463 DOI: 10.3201/eid2606.191431] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We report the discovery of a new orthobunyavirus, Cristoli virus, by means of shotgun metagenomics. The virus was identified in an immunodepressed patient with fatal encephalitis. Full-length genome sequencing revealed high-level expression of a virulence factor, possibly explaining the severity of the infection. The patient’s recent history suggests circulation in France.
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14
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Abstract
We describe Shuni virus (SHUV) detection in human neurologic disease cases in South Africa. SHUV RNA was identified in 5% of cerebrospinal fluid specimens collected during the arbovirus season from public sector hospitals. This finding suggests that SHUV may be a previously unrecognized cause of human neurologic infections in Africa.
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15
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Sánchez Romano J, Omazic A, Leijon M, Hagström Å, Tryland M, Kantanen J, Reilas T, Rockström U, Fedorov V, Albihn A. Screening of Eurasian Tundra Reindeer for Viral Sequences by Next-Generation Sequencing. Int J Environ Res Public Health 2021; 18:6561. [PMID: 34207171 DOI: 10.3390/ijerph18126561] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/09/2021] [Accepted: 06/14/2021] [Indexed: 11/17/2022]
Abstract
Reindeer husbandry is essential for the livelihood and culture of indigenous people in the Arctic. Parts of the herding areas are also used as pastures for farm animals, facilitating potential transmission of viruses between species. Following the Covid-19 pandemic, viruses circulating in the wild are receiving increased attention, since they might pose a potential threat to human health. Climate change will influence the prevalence of infectious diseases of both humans and animals. The aim of this study was to detect known and previously unknown viruses in Eurasian tundra reindeer. In total, 623 nasal and 477 rectal swab samples were collected from reindeer herds in Fennoscandia, Iceland, and Eastern Russia during 2016–2019. Next-generation sequencing analysis and BLAST-homology searches indicated the presence of viruses of domesticated and wild animals, such as bovine viral diarrhea virus, bovine papillomavirus, alcephaline herpesvirus 1 and 2, deer mastadenovirus B, bovine rotavirus, and roe deer picobirnavirus. Several viral species previously found in reindeer and some novel species were detected, although the clinical relevance of these viruses in reindeer is largely unknown. These results indicate that it should be possible to find emerging viruses of relevance for both human and animal health using reindeer as a sentinel species.
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16
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Abstract
The Orthobunyavirus genus, family Peribunyaviridae, contains several important emerging and re-emerging arboviruses of veterinary and medical importance. These viruses may cause mild febrile illness, to severe encephalitis, fetal deformity, abortion, hemorrhagic fever and death in humans and/or animals. Shuni virus (SHUV) is a zoonotic arbovirus thought to be transmitted by hematophagous arthropods. It was previously reported in a child in Nigeria in 1966 and horses in Southern Africa in the 1970s and again in 2009, and in humans with neurological signs in 2017. Here we investigated the epidemiology and phylogenetic relationship of SHUV strains detected in horses presenting with febrile and neurological signs in South Africa. In total, 24/1820 (1.3%) horses submitted to the zoonotic arbovirus surveillance program tested positive by real-time reverse transcription (RTPCR) between 2009 and 2019. Cases were detected in all provinces with most occurring in Gauteng (9/24, 37.5%). Neurological signs occurred in 21/24 (87.5%) with a fatality rate of 45.8%. Partial sequencing of the nucleocapsid gene clustered the identified strains with SHUV strains previously identified in South Africa (SA). Full genome sequencing of a neurological case detected in 2016 showed 97.8% similarity to the SHUV SA strain (SAE18/09) and 97.5% with the Nigerian strain and 97.1% to the 2014 Israeli strain. Our findings suggest that SHUV is circulating annually in SA and despite it being relatively rare, it causes severe neurological disease and death in horses.
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Affiliation(s)
- Thopisang P. Motlou
- Zoonotic Arbo and Respiratory Virus Program, Centre for Viral Zoonoses, Department Medical Virology, Faculty of Health Sciences, University of Pretoria, Pretoria 0031, South Africa;
| | - June Williams
- Department of Paraclinical Sciences, Section Pathology, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa;
| | - Marietjie Venter
- Zoonotic Arbo and Respiratory Virus Program, Centre for Viral Zoonoses, Department Medical Virology, Faculty of Health Sciences, University of Pretoria, Pretoria 0031, South Africa;
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17
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Ramírez-Martínez MM, Bennett AJ, Dunn CD, Yuill TM, Goldberg TL. Bat Flies of the Family Streblidae (Diptera: Hippoboscoidea) Host Relatives of Medically and Agriculturally Important "Bat-Associated" Viruses. Viruses 2021; 13:v13050860. [PMID: 34066683 PMCID: PMC8150819 DOI: 10.3390/v13050860] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 01/05/2023] Open
Abstract
Bat flies (Hippoboscoidea: Nycteribiidae and Streblidae) are obligate hematophagous ectoparasites of bats. We collected streblid bat flies from the New World (México) and the Old World (Uganda), and used metagenomics to identify their viruses. In México, we found méjal virus (Rhabdoviridae; Vesiculovirus), Amate virus (Reoviridae: Orbivirus), and two unclassified viruses of invertebrates. Méjal virus is related to emerging zoonotic encephalitis viruses and to the agriculturally important vesicular stomatitis viruses (VSV). Amate virus and its sister taxon from a bat are most closely related to mosquito- and tick-borne orbiviruses, suggesting a previously unrecognized orbivirus transmission cycle involving bats and bat flies. In Uganda, we found mamucuso virus (Peribunyaviridae: Orthobunyavirus) and two unclassified viruses (a rhabdovirus and an invertebrate virus). Mamucuso virus is related to encephalitic viruses of mammals and to viruses from nycteribiid bat flies and louse flies, suggesting a previously unrecognized orthobunyavirus transmission cycle involving hippoboscoid insects. Bat fly virus transmission may be neither strictly vector-borne nor strictly vertical, with opportunistic feeding by bat flies occasionally leading to zoonotic transmission. Many "bat-associated" viruses, which are ecologically and epidemiologically associated with bats but rarely or never found in bats themselves, may actually be viruses of bat flies or other bat ectoparasites.
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Affiliation(s)
- María M. Ramírez-Martínez
- Departamento de Ciencias de la Salud y Ecología Humana, Universidad de Guadalajara, Guadalajara, Autlán CP 48900, Mexico;
| | - Andrew J. Bennett
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
- Genomics and Bioinformatics Department, Biological Defense Research Directorate, Naval Medical Research Center–Frederick, Fort Detrick, Frederick, MD 21702, USA
| | - Christopher D. Dunn
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
| | - Thomas M. Yuill
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
| | - Tony L. Goldberg
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin–Madison, Madison, WI 53706, USA; (A.J.B.); (C.D.D.); (T.M.Y.)
- Correspondence: ; Tel.: +1-608-890-2618
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18
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Affiliation(s)
- Kyle J Coleman
- Neuro-Infectious Diseases Group, Division of Infectious Diseases, Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Lakshmi Chauhan
- Neuro-Infectious Diseases Group, Division of Infectious Diseases, Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Amanda L Piquet
- Neuro-Infectious Diseases Group, Division of Infectious Diseases, Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Kenneth L Tyler
- Neuro-Infectious Diseases Group, Division of Infectious Diseases, Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA.,Department of Immunology-Microbiology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Daniel M Pastula
- Neuro-Infectious Diseases Group, Division of Infectious Diseases, Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA.,Department of Epidemiology, Colorado School of Public Health, Aurora, CO, USA
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19
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Wernike K, Aebischer A, Sick F, Szillat KP, Beer M. Differentiation of Antibodies against Selected Simbu Serogroup Viruses by a Glycoprotein Gc-Based Triplex ELISA. Vet Sci 2021; 8:12. [PMID: 33477718 DOI: 10.3390/vetsci8010012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/11/2021] [Accepted: 01/15/2021] [Indexed: 11/17/2022] Open
Abstract
The Simbu serogroup of orthobunyaviruses includes several pathogens of veterinary importance, among them Schmallenberg virus (SBV), Akabane virus (AKAV) and Shuni virus (SHUV). They infect predominantly ruminants and induce severe congenital malformation. In adult animals, the intra vitam diagnostics by direct virus detection is limited to only a few days due to a short-lived viremia. For surveillance purposes the testing for specific antibodies is a superior approach. However, the serological differentiation is hampered by a considerable extent of cross-reactivity, as viruses were assigned into this serogroup based on antigenic relatedness. Here, we established a glycoprotein Gc-based triplex enzyme-linked immunosorbent assay (ELISA) for the detection and differentiation of antibodies against SBV, AKAV, and SHUV. A total of 477 negative samples of various ruminant species, 238 samples positive for SBV-antibodies, 36 positive for AKAV-antibodies and 53 SHUV antibody-positive samples were tested in comparison to neutralization tests. For the newly developed ELISA, overall diagnostic specificities of 84.56%, 94.68% and 89.39% and sensitivities of 89.08%, 69.44% and 84.91% were calculated for SBV, AKAV and SHUV, respectively, with only slight effects of serological cross-reactivity on the diagnostic specificity. Thus, this test system could be used for serological screening in suspected populations or as additional tool during outbreak investigations.
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Solomon IH, Ganesh VS, Yu G, Deng XD, Wilson MR, Miller S, Milligan TA, Mukerji SS, Mathewson A, Linxweiler J, Morse D, Ritter JM, Staples JE, Hughes H, Gould CV, Sabeti PC, Chiu CY, Piantadosi A. Fatal Case of Chronic Jamestown Canyon Virus Encephalitis Diagnosed by Metagenomic Sequencing in Patient Receiving Rituximab. Emerg Infect Dis 2021; 27. [PMID: 33261720 PMCID: PMC7774567 DOI: 10.3201/eid2701.203448] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
A 56-year-old man receiving rituximab who had months of neurologic symptoms was found to have Jamestown Canyon virus in cerebrospinal fluid by clinical metagenomic sequencing. The patient died, and postmortem examination revealed extensive neuropathologic abnormalities. Deep sequencing enabled detailed characterization of viral genomes from the cerebrospinal fluid, cerebellum, and cerebral cortex.
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21
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Thamamongood T, Aebischer A, Wagner V, Chang MW, Elling R, Benner C, García-Sastre A, Kochs G, Beer M, Schwemmle M. A Genome-Wide CRISPR-Cas9 Screen Reveals the Requirement of Host Cell Sulfation for Schmallenberg Virus Infection. J Virol 2020; 94:e00752-20. [PMID: 32522852 DOI: 10.1128/JVI.00752-20] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 06/05/2020] [Indexed: 02/07/2023] Open
Abstract
Schmallenberg virus (SBV) is an insect-transmitted orthobunyavirus that can cause abortions and congenital malformations in the offspring of ruminants. Even though the two viral surface glycoproteins Gn and Gc are involved in host cell entry, the specific cellular receptors of SBV are currently unknown. Using genome-wide CRISPR-Cas9 forward screening, we identified 3'-phosphoadenosine 5'-phosphosulfate (PAPS) transporter 1 (PAPST1) as an essential factor for SBV infection. PAPST1 is a sulfotransferase involved in heparan sulfate proteoglycan synthesis encoded by the solute carrier family 35 member B2 gene (SLC35B2). SBV cell surface attachment and entry were largely reduced upon the knockout of SLC35B2, whereas the reconstitution of SLC35B2 in these cells fully restored their susceptibility to SBV infection. Furthermore, treatment of cells with heparinase diminished infection with SBV, confirming that heparan sulfate plays an important role in cell attachment and entry, although to various degrees, heparan sulfate was also found to be important to initiate infection by two other bunyaviruses, La Crosse virus and Rift Valley fever virus. Thus, PAPST1-triggered synthesis of cell surface heparan sulfate is required for the efficient replication of SBV and other bunyaviruses.IMPORTANCE SBV is a newly emerging orthobunyavirus (family Peribunyaviridae) that has spread rapidly across Europe since 2011, resulting in substantial economic losses in livestock farming. In this study, we performed unbiased genome-wide CRISPR-Cas9 screening and identified PAPST1, a sulfotransferase encoded by SLC35B2, as a host entry factor for SBV. Consistent with its role in the synthesis of heparan sulfate, we show that this activity is required for efficient infection by SBV. A comparable dependency on heparan sulfate was also observed for La Crosse virus and Rift Valley fever virus, highlighting the importance of heparan sulfate for host cell infection by bunyaviruses. Thus, the present work provides crucial insights into virus-host interactions of important animal and human pathogens.
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22
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Oymans J, Wichgers Schreur PJ, van Oort S, Vloet R, Venter M, Pijlman GP, van Oers MM, Kortekaas J. Reverse Genetics System for Shuni Virus, an Emerging Orthobunyavirus with Zoonotic Potential. Viruses 2020; 12:E455. [PMID: 32316542 PMCID: PMC7232226 DOI: 10.3390/v12040455] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 01/10/2023] Open
Abstract
The genus Orthobunyavirus (family Peribunyaviridae, order Bunyavirales) comprises over 170 named mosquito- and midge-borne viruses, several of which cause severe disease in animals or humans. Their three-segmented genomes enable reassortment with related viruses, which may result in novel viruses with altered host or tissue tropism and virulence. One such reassortant, Schmallenberg virus (SBV), emerged in north-western Europe in 2011. Shuni virus (SHUV) is an orthobunyavirus related to SBV that is associated with neurological disease in horses in southern Africa and recently caused an outbreak manifesting with neurological disease and birth defects among ruminants in Israel. The zoonotic potential of SHUV was recently underscored by its association with neurological disease in humans. We here report a reverse genetics system for SHUV and provide first evidence that the non-structural (NSs) protein of SHUV functions as an antagonist of host innate immune responses. We furthermore report the rescue of a reassortant containing the L and S segments of SBV and the M segment of SHUV. This novel reverse genetics system can now be used to study SHUV virulence and tropism, and to elucidate the molecular mechanisms that drive reassortment events.
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Affiliation(s)
- Judith Oymans
- Department of Virology, Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, The Netherlands; (J.O.); (P.J.W.S.); (S.v.O.); (R.V.)
- Laboratory of Virology, Wageningen University & Research, P.O. Box 16, 6700 AA Wageningen, The Netherlands; (G.P.P.); (M.M.v.O.)
| | - Paul J. Wichgers Schreur
- Department of Virology, Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, The Netherlands; (J.O.); (P.J.W.S.); (S.v.O.); (R.V.)
| | - Sophie van Oort
- Department of Virology, Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, The Netherlands; (J.O.); (P.J.W.S.); (S.v.O.); (R.V.)
| | - Rianka Vloet
- Department of Virology, Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, The Netherlands; (J.O.); (P.J.W.S.); (S.v.O.); (R.V.)
| | - Marietjie Venter
- Department Medical Virology, Faculty of Health Science, Centre for Viral Zoonoses, University of Pretoria, Pretoria 0028, South Africa;
| | - Gorben P. Pijlman
- Laboratory of Virology, Wageningen University & Research, P.O. Box 16, 6700 AA Wageningen, The Netherlands; (G.P.P.); (M.M.v.O.)
| | - Monique M. van Oers
- Laboratory of Virology, Wageningen University & Research, P.O. Box 16, 6700 AA Wageningen, The Netherlands; (G.P.P.); (M.M.v.O.)
| | - Jeroen Kortekaas
- Department of Virology, Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, The Netherlands; (J.O.); (P.J.W.S.); (S.v.O.); (R.V.)
- Laboratory of Virology, Wageningen University & Research, P.O. Box 16, 6700 AA Wageningen, The Netherlands; (G.P.P.); (M.M.v.O.)
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Abstract
Epizootic congenital abnormalities caused by Akabane, Aino, and Chuzan viruses have damaged the reproduction of domestic ruminants in East Asia for many years. In the past, large outbreaks of febrile illness related to bovine ephemeral fever and Ibaraki viruses severely affected the cattle industry in that region. In recent years, vaccines against these viruses have reduced the occurrence of diseases, although the viruses are still circulating and have occasionally caused sporadic and small-scaled epidemics. Over a long-term monitoring period, many arboviruses other than the above-mentioned viruses have been isolated from cattle and Culicoides biting midges in Japan. Several novel arboviruses that may infect ruminants (e.g., mosquito- and tick-borne arboviruses) were recently reported in mainland China based on extensive surveillance. It is noteworthy that some are suspected of being associated with cattle diseases. Malformed calves exposed to an intrauterine infection with orthobunyaviruses (e.g., Peaton and Shamonda viruses) have been observed. Epizootic hemorrhagic disease virus serotype 6 caused a sudden outbreak of hemorrhagic disease in cattle in Japan. Unfortunately, the pathogenicity of many other viruses in ruminants has been uncertain, although these viruses potentially affect livestock production. As global transportation grows, the risk of an accidental incursion of arboviruses is likely to increase in previously non-endemic areas. Global warming will also certainly affect the distribution and active period of vectors, and thus the range of virus spreads will expand to higher-latitude regions. To prevent anticipated damages to the livestock industry, the monitoring system for arboviral circulation and incursion should be strengthened; moreover, the sharing of information and preventive strategies will be essential in East Asia.
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Affiliation(s)
- Tohru Yanase
- Kyushu Research Station, National Institute of Animal Health, NARO, Kagoshima, Japan
| | - Katsunori Murota
- Kyushu Research Station, National Institute of Animal Health, NARO, Kagoshima, Japan
| | - Yoko Hayama
- Viral Disease and Epidemiology Research Division, National Institute of Animal Health, NARO, Tsukuba, Japan
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de Oliveira Filho EF, Carneiro IO, Ribas JRL, Fischer C, Marklewitz M, Junglen S, Netto EM, Franke CR, Drexler JF. Identification of animal hosts of Fort Sherman virus, a New World zoonotic orthobunyavirus. Transbound Emerg Dis 2020; 67:1433-1441. [PMID: 32009301 DOI: 10.1111/tbed.13499] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 12/19/2019] [Accepted: 01/29/2020] [Indexed: 02/02/2023]
Abstract
An orthobunyavirus termed Fort Sherman virus (FSV) was isolated in 1985 from a febrile US soldier in Panama, yet potential animal reservoirs remained unknown. We investigated sera from 192 clinically healthy peri-domestic animals sampled in northeastern Brazil during 2014-2018 by broadly reactive RT-PCR for orthobunyavirus RNA, including 50 cattle, 57 sheep, 35 goats and 50 horses. One horse sampled in 2018 was positive (0.5%; 95% CI, 0.01-3.2) at 6.2 × 103 viral RNA copies/mL. Genomic comparisons following virus isolation in Vero cells and deep sequencing revealed high identity of translated amino acid sequences between the new orthobunyavirus and the Panamanian FSV prototype (genes: L, 98.8%; M, 83.5%; S, 100%), suggesting these viruses are conspecific. Database comparisons revealed even higher genomic identity between the Brazilian FSV and taxonomically unassigned Argentinian mosquito- and horse-derived viruses sampled in 1965, 1982 and 2013 with only 1.1% maximum translated amino acid distances across viral genes, suggesting the Argentinian viruses were also distinct FSV strains. The Panamanian FSV strain was an M gene reassortant relative to all Southern American FSV strains, clustering phylogenetically with Cache Valley virus (CVV). Mean dN/dS ratios among FSV genes ranged from 0.03 to 0.07, compatible with strong purifying selection. FSV-specific neutralizing antibodies occurred at relatively high end-point titres in the range of 1:300 in 22.0% of horses (11 out of 50 animals), 8.0% of cattle (4/50 animals), 7.0% of sheep (4/57 animals) and 2.9% of goats (1/35 animals). High specificity of serologic testing was suggested by significantly higher overall FSV-specific compared to CVV- and Bunyamwera virus-specific end-point titres (p = .009), corroborating a broad vertebrate host range within peri-domestic animals. Growth kinetics using mosquito-, midge- and sandfly-derived cell lines suggested Aedes mosquitos as potential vectors. Our findings highlight the occurrence of FSV across a geographic range exceeding 7,000 km, surprising genomic conservation across a time span exceeding 50 years, M gene-based reassortment events, and the existence of multiple animal hosts of FSV.
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Affiliation(s)
- Edmilson F de Oliveira Filho
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | | | | | - Carlo Fischer
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Marco Marklewitz
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Sandra Junglen
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | | | | | - Jan Felix Drexler
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,German Centre for Infection Research (DZIF), Associated Partner Site Charité, Berlin, Germany.,Martsinovsky Institute of Medical Parasitology, Tropical and Vector-Borne Diseases, Sechenov University, Moscow, Russia
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25
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Abstract
We reviewed the literature on the role of temperature in transmission of zoonotic arboviruses. Vector competence is affected by both direct and indirect effects of temperature, and generally increases with increasing temperature, but results may vary by vector species, population, and viral strain. Temperature additionally has a significant influence on life history traits of vectors at both immature and adult life stages, and for important behaviors such as blood-feeding and mating. Similar to vector competence, temperature effects on life history traits can vary by species and population. Vector, host, and viral distributions are all affected by temperature, and are generally expected to change with increased temperatures predicted under climate change. Arboviruses are generally expected to shift poleward and to higher elevations under climate change, yet significant variability on fine geographic scales is likely. Temperature effects are generally unimodal, with increases in abundance up to an optimum, and then decreases at high temperatures. Improved vector distribution information could facilitate future distribution modeling. A wide variety of approaches have been used to model viral distributions, although most research has focused on the West Nile virus. Direct temperature effects are frequently observed, as are indirect effects, such as through droughts, where temperature interacts with rainfall. Thermal biology approaches hold much promise for syntheses across viruses, vectors, and hosts, yet future studies must consider the specificity of interactions and the dynamic nature of evolving biological systems.
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Affiliation(s)
- Alexander T Ciota
- Wadsworth Center, New York State Department of Health, Albany, NY 12201, USA.
- Department of Biomedical Sciences, State University of New York at Albany School of Public Health, Rensselaer, NY 12144, USA.
| | - Alexander C Keyel
- Wadsworth Center, New York State Department of Health, Albany, NY 12201, USA.
- Department of Atmospheric and Environmental Sciences, University at Albany, Albany, NY 12222, USA.
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26
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Kopp A, Hübner A, Zirkel F, Hobelsberger D, Estrada A, Jordan I, Gillespie TR, Drosten C, Junglen S. Detection of Two Highly Diverse Peribunyaviruses in Mosquitoes from Palenque, Mexico. Viruses 2019; 11:v11090832. [PMID: 31500304 PMCID: PMC6783978 DOI: 10.3390/v11090832] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/05/2019] [Accepted: 09/06/2019] [Indexed: 01/29/2023] Open
Abstract
The Peribunyaviridae family contains the genera Orthobunyavirus, Herbevirus, Pacuvirus, and Shangavirus. Orthobunyaviruses and pacuviruses are mainly transmitted by blood-feeding insects and infect a variety of vertebrates whereas herbeviruses and shangaviruses have a host range restricted to insects. Here, we tested mosquitoes from a tropical rainforest in Mexico for infections with peribunyaviruses. We identified and characterized two previously unknown viruses, designated Baakal virus (BKAV) and Lakamha virus (LAKV). Sequencing and de novo assembly of the entire BKAV and LAKV genomes revealed that BKAV is an orthobunyavirus and LAKV is likely to belong to a new genus. LAKV was almost equidistant to the established peribunyavirus genera and branched as a deep rooting solitary lineage basal to herbeviruses. Virus isolation attempts of LAKV failed. BKAV is most closely related to the bird-associated orthobunyaviruses Koongol virus and Gamboa virus. BKAV was successfully isolated in mosquito cells but did not replicate in common mammalian cells from various species and organs. Also cells derived from chicken were not susceptible. Interestingly, BKAV can infect cells derived from a duck species that is endemic in the region where the BKAV-positive mosquito was collected. These results suggest a narrow host specificity and maintenance in a mosquito–bird transmission cycle.
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Affiliation(s)
- Anne Kopp
- Berlin Institute of Health, Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, 10117 Berlin, Germany.
| | - Alexandra Hübner
- Berlin Institute of Health, Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, 10117 Berlin, Germany.
| | - Florian Zirkel
- Institute of Virology, University of Bonn Medical Centre, Bonn, Germany, Biotest AG, 63303 Dreieich, Germany.
| | | | - Alejandro Estrada
- Estación de Biología Tropical Los Tuxtlas, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City 04513, Mexico.
| | | | - Thomas R Gillespie
- Department of Environmental Sciences and Program in Population Biology, Ecology and Evolution, Emory University, Atlanta, GA 30322, USA.
- Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA.
| | - Christian Drosten
- Berlin Institute of Health, Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, 10117 Berlin, Germany.
| | - Sandra Junglen
- Berlin Institute of Health, Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, 10117 Berlin, Germany.
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27
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Evans AB, Peterson KE. Throw out the Map: Neuropathogenesis of the Globally Expanding California Serogroup of Orthobunyaviruses. Viruses 2019; 11:E794. [PMID: 31470541 DOI: 10.3390/v11090794] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/23/2019] [Accepted: 08/26/2019] [Indexed: 12/19/2022] Open
Abstract
The California serogroup (CSG) comprises 18 serologically and genetically related mosquito-borne orthobunyaviruses. Of these viruses, at least seven have been shown to cause neurological disease in humans, including the leading cause of pediatric arboviral encephalitis in the USA, La Crosse virus. Despite the disease burden from these viruses, much is still unknown about the CSG viruses. This review summarizes our current knowledge of the CSG viruses, including human disease and the mechanisms of neuropathogenesis.
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28
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Sick F, Beer M, Kampen H, Wernike K. Culicoides Biting Midges-Underestimated Vectors for Arboviruses of Public Health and Veterinary Importance. Viruses 2019; 11:E376. [PMID: 31022868 DOI: 10.3390/v11040376] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/10/2019] [Accepted: 04/18/2019] [Indexed: 01/12/2023] Open
Abstract
Culicoides biting midges, small hematophagous dipterans, are the demonstrated or putative vectors of multiple arboviruses of veterinary and public health importance. Despite its relevance in disease spread, the ceratopogonid genus Culicoides is still a largely neglected group of species, predominantly because the major human-affecting arboviruses are considered to be transmitted by mosquitoes. However, when a pathogen is detected in a certain vector species, a thorough search for further vectors often remains undone and, therefore, the relevant vector species may remain unknown. Furthermore, for many hematophagous arthropods, true vector competence is often merely suspected and not experimentally proven. Therefore, we aim to illuminate the general impact of Culicoides biting midges and to summarize the knowledge about biting midge-borne disease agents using the order Bunyavirales, the largest and most diverse group of RNA viruses, as an example. When considering only viruses evidentially transmitted by Culicoides midges, the Simbu serogroup (genus Orthobunyavirus) is presumably the most important group within the virus order. Its members are of great veterinary importance, as a variety of simbuviruses, e.g., the species Akabane orthobunyavirus or Schmallenberg orthobunyavirus, induces severe congenital infections in pregnant animals. The major zoonotic representative of this serogroup occurs in South and Central America and causes the so-called Oropouche fever, an acute febrile illness in humans.
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29
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Jo WK, Pfankuche VM, Lehmbecker A, Martina B, Rubio-Garcia A, Becker S, Kruppa J, Jung K, Klotz D, Metzger J, Ludlow M, Baumgärtner W, van der Vries E, Osterhaus A. Association of Batai Virus Infection and Encephalitis in Harbor Seals, Germany, 2016. Emerg Infect Dis 2019; 24:1691-1695. [PMID: 30124416 PMCID: PMC6106443 DOI: 10.3201/eid2409.171829] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
We isolated Batai virus from the brain of a euthanized, 26-year-old, captive harbor seal with meningoencephalomyelitis in Germany. We provide evidence that this orthobunyavirus can naturally infect the central nervous system of a mammal. The full-genome sequence showed differences from a previously reported virus isolate from a mosquito in Germany.
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30
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Maes P, Adkins S, Alkhovsky SV, Avšič-Županc T, Ballinger MJ, Bente DA, Beer M, Bergeron É, Blair CD, Briese T, Buchmeier MJ, Burt FJ, Calisher CH, Charrel RN, Choi IR, Clegg JCS, de la Torre JC, de Lamballerie X, DeRisi JL, Digiaro M, Drebot M, Ebihara H, Elbeaino T, Ergünay K, Fulhorst CF, Garrison AR, Gāo GF, Gonzalez JPJ, Groschup MH, Günther S, Haenni AL, Hall RA, Hewson R, Hughes HR, Jain RK, Jonson MG, Junglen S, Klempa B, Klingström J, Kormelink R, Lambert AJ, Langevin SA, Lukashevich IS, Marklewitz M, Martelli GP, Mielke-Ehret N, Mirazimi A, Mühlbach HP, Naidu R, Nunes MRT, Palacios G, Papa A, Pawęska JT, Peters CJ, Plyusnin A, Radoshitzky SR, Resende RO, Romanowski V, Sall AA, Salvato MS, Sasaya T, Schmaljohn C, Shí X, Shirako Y, Simmonds P, Sironi M, Song JW, Spengler JR, Stenglein MD, Tesh RB, Turina M, Wèi T, Whitfield AE, Yeh SD, Zerbini FM, Zhang YZ, Zhou X, Kuhn JH. Taxonomy of the order Bunyavirales: second update 2018. Arch Virol 2019; 164:927-941. [PMID: 30663021 PMCID: PMC6581445 DOI: 10.1007/s00705-018-04127-3] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In October 2018, the order Bunyavirales was amended by inclusion of the family Arenaviridae, abolishment of three families, creation of three new families, 19 new genera, and 14 new species, and renaming of three genera and 22 species. This article presents the updated taxonomy of the order Bunyavirales as now accepted by the International Committee on Taxonomy of Viruses (ICTV).
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Affiliation(s)
- Piet Maes
- Zoonotic Infectious Diseases unit, Rega Institute, KU Leuven, Leuven, Belgium
| | - Scott Adkins
- United States Department of Agriculture, Agricultural Research Service, US Horticultural Research Laboratory, Fort Pierce, FL, USA
| | - Sergey V Alkhovsky
- D. I. Ivanovsky Institute of Virology, N. F. Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | | | - Matthew J Ballinger
- Department of Biological Sciences, Mississippi State University, Mississippi State, MS, USA
| | | | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Éric Bergeron
- Viral Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Carol D Blair
- Department of Microbiology, Immunology & Pathology, Arthropod-borne and Infectious Diseases Laboratory, Colorado State University, Fort Collins, CO, USA
| | - Thomas Briese
- Department of Epidemiology, Mailman School of Public Health, Center for Infection and Immunity, Columbia University, New York, NY, USA
| | - Michael J Buchmeier
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Felicity J Burt
- Division of Virology, National Health Laboratory Service, Bloemfontein, Republic of South Africa
- Division of Virology, University of the Free State, Bloemfontein, Republic of South Africa
| | - Charles H Calisher
- Department of Microbiology, Immunology & Pathology, Arthropod-borne and Infectious Diseases Laboratory, Colorado State University, Fort Collins, CO, USA
| | - Rémi N Charrel
- Unité des Virus Emergents (Aix-Marseille Univ-IRD 190-Inserm 1207-IHU Méditerranée Infection), Marseille, France
| | - Il Ryong Choi
- Plant Breeding Genetics and Biotechnology Division, International Rice Research Institute, Los Baños, Philippines
| | | | - Juan Carlos de la Torre
- Department of Immunology and Microbiology IMM-6, The Scripps Research Institute, La Jolla, CA, USA
| | - Xavier de Lamballerie
- Unité des Virus Emergents (Aix-Marseille Univ-IRD 190-Inserm 1207-IHU Méditerranée Infection), Marseille, France
| | - Joseph L DeRisi
- Department of Medicine, University of California, San Francisco, CA, USA
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA, USA
- Department of Microbiology, University of California, San Francisco, CA, USA
| | | | - Mike Drebot
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Hideki Ebihara
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN, USA
| | | | - Koray Ergünay
- Virology Unit, Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | | | - Aura R Garrison
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, USA
| | - George Fú Gāo
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jean-Paul J Gonzalez
- Center of Excellence for Emerging and Zoonotic Animal Disease, Kansas State University, Manhattan, KS, USA
| | - Martin H Groschup
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, Beijing, China
- Shanghai Public Health Clinical Center & Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Stephan Günther
- Department of Virology, Bernhard-Nocht Institute for Tropical Medicine, WHO Collaborating Centre for Arboviruses and Hemorrhagic Fever Reference and Research, Hamburg, Germany
| | - Anne-Lise Haenni
- Institut Jacques Monod, CNRS-Université Paris-Diderot, Paris, France
| | - Roy A Hall
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Roger Hewson
- Public Health England, Porton Down, Wiltshire, Salisbury, UK
| | - Holly R Hughes
- Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Rakesh K Jain
- Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi, India
| | - Miranda Gilda Jonson
- Department of Agricultural Biotechnology, Center for Fungal Pathogenesis, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Sandra Junglen
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Free University Berlin, Humboldt-University Berlin, and Berlin Institute of Health, Berlin, Germany
- German Centre for Infection Research, Berlin, Germany
| | - Boris Klempa
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Free University Berlin, Humboldt-University Berlin, and Berlin Institute of Health, Berlin, Germany
- Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Jonas Klingström
- Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Richard Kormelink
- Laboratory of Virology, Department of Plant Sciences, Wageningen University, Wageningen, The Netherlands
| | - Amy J Lambert
- Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | | | - Igor S Lukashevich
- Department of Pharmacology and Toxicology, School of Medicine, and the Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville, Louisville, KY, USA
| | - Marco Marklewitz
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Free University Berlin, Humboldt-University Berlin, and Berlin Institute of Health, Berlin, Germany
- German Centre for Infection Research, Berlin, Germany
| | - Giovanni P Martelli
- Department of Plant, Soil and Food Sciences, University of Bari Aldo Moro, Bari, Italy
| | | | | | | | - Rayapati Naidu
- Department of Plant Pathology, Irrigated Agricultural Research and Extension Center, Washington State University, Prosser, WA, USA
| | | | - Gustavo Palacios
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, USA
| | - Anna Papa
- Department of Microbiology, Medical School, National Reference Centre for Arboviruses and Haemorrhagic Fever Viruses, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Janusz T Pawęska
- Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases, National Health Laboratory Service, Sandringham, South Africa
- Department of Medical Virology, Centre for Viral Zoonoses, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | | | - Alexander Plyusnin
- Department of Virology, University of Helsinki, Medicum, Helsinki, Finland
| | - Sheli R Radoshitzky
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, USA
| | - Renato O Resende
- Departamento de Biologia Celular, Universidade de Brasília, Barsília, DF, Brazil
| | - Víctor Romanowski
- Instituto de Biotecnología y Biología Molecular, Centro Cientifico Technológico-La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de La Plata, La Plata, Argentina
| | | | - Maria S Salvato
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Takahide Sasaya
- Department of Planning and Coordination, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Connie Schmaljohn
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD, USA
| | - Xiǎohóng Shí
- MRC-University of Glasgow Centre for Virus Research, Glasgow, Scotland, UK
| | - Yukio Shirako
- Asian Center for Bioresources and Environmental Sciences, University of Tokyo, Tokyo, Japan
| | - Peter Simmonds
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Manuela Sironi
- Bioinformatics Scientific Institute IRCCS E. MEDEA, Bosisio Parini, Italy
| | - Jin-Won Song
- Department of Microbiology, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Jessica R Spengler
- Viral Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Mark D Stenglein
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, USA
| | - Robert B Tesh
- University of Texas Medical Branch, Galveston, TX, USA
| | - Massimo Turina
- Institute for Sustainable Plant Protection, CNR, Torino, Italy
| | - Tàiyún Wèi
- Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Anna E Whitfield
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, USA
| | - Shyi-Dong Yeh
- Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan
| | - F Murilo Zerbini
- Departamento de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Yong-Zhen Zhang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, Beijing, China
- Shanghai Public Health Clinical Center & Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Xueping Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jens H Kuhn
- Integrated Research Facility at Fort Detrick (IRF-Frederick), Division of Clinical Research (DCR), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), B-8200 Research Plaza, Fort Detrick, Frederick, MD, 21702, USA.
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Wise EL, Pullan ST, Márquez S, Paz V, Mosquera JD, Zapata S, Jackson SK, Fejer G, Trueba G, Logue CH. Isolation of Oropouche Virus from Febrile Patient, Ecuador. Emerg Infect Dis 2019; 24:935-937. [PMID: 29664378 PMCID: PMC5938787 DOI: 10.3201/eid2405.171569] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We report identification of an Oropouche virus strain in a febrile patient from Ecuador by using metagenomic sequencing and real-time reverse transcription PCR. Virus was isolated from patient serum by using Vero cells. Phylogenetic analysis of the whole-genome sequence showed the virus to be similar to a strain from Peru.
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32
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König P, Wernike K, Hechinger S, Tauscher K, Breithaupt A, Beer M. Fetal infection with Schmallenberg virus - An experimental pathogenesis study in pregnant cows. Transbound Emerg Dis 2018; 66:454-462. [PMID: 30354028 DOI: 10.1111/tbed.13045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/22/2018] [Accepted: 10/16/2018] [Indexed: 11/29/2022]
Abstract
Since its first appearance in 2011, Schmallenberg virus (SBV) has been repeatedly detected in aborted ruminant foetuses or severely malformed newborns whose mothers were naturally infected during pregnancy. However, especially the knowledge about dynamics of foetal infection in cattle is still scarce. Therefore, a total of 36 pregnant heifers were experimentally infected during two animal trials with SBV between days 60 and 150 of gestation. The foetuses were collected between 10 and 35 days after infection and virologically and pathologically investigated. Overall, 33 heifers yielded normally developed, macroscopically inconspicuous foetuses, but abundant virus replication was evident at the maternal/foetal interface and viral genome was detectable in at least one organ system of 18 out of 35 foetuses. One heifer was found to be not pregnant at autopsy. One of the animals aborted at day 4 after infection, viral RNA was detectable in the lymphatic tissue of the dam, in the maternal and foetal placenta, and in organs and lymphatic tissue of the foetus. In another foetus, SBV typical malformations like torticollis and arthrogryposis were observed. The corresponding dam was infected at day 90 of pregnancy and viral genome was detectable in the cerebellum of the unborn. Interestingly, no common patterns of infected foetal organs or maternal/foetal placentas could be identified, and both, sites of virus replication and genome loads, varied to a high degree in the individual foetuses. It is therefore concluded, that SBV infects in many cases also the bovine foetus of naïve pregnant cattle, however, the experimentally observed low abortion/malformation rate is in concordance to the reported low rates in the field during the first outbreak wave following the introduction of SBV. This observation speaks for a natural resistance of most bovine foetuses even during the vulnerable phase of early pregnancy, which has to be further studied in the future.
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Affiliation(s)
- Patricia König
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Kerstin Wernike
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Silke Hechinger
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Kerstin Tauscher
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Angele Breithaupt
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
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Abstract
Despite the lack of evidence for symptomatic human infection with Maguari virus (MAGV), its close relation to Cache Valley virus (CVV), which does infect humans, remains a concern. We sequenced the complete genome of a MAGV-like isolate (OBS6657) obtained from a febrile patient in Pucallpa, Ucayali, Peru, in 1998. To facilitate its classification, we generated additional full-length sequences for the MAGV prototype strain, 3 additional MAGV-like isolates, and the closely related CVV (7 strains), Tlacotalpan (1 strain), Playas (3 strains), and Fort Sherman (1 strain) viruses. The OBS6657 isolate is similar to the MAGV prototype, whereas 2 of the other MAGV-like isolates are located on a distinct branch and most likely warrant classification as a separate virus species and 1 is, in fact, a misclassified CVV strain. Our findings provide clear evidence that MAGV can cause human disease.
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34
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Hirashima Y, Kitahara S, Kato T, Shirafuji H, Tanaka S, Yanase T. Congenital Malformations of Calves Infected with Shamonda Virus, Southern Japan. Emerg Infect Dis 2018; 23:993-996. [PMID: 28518043 PMCID: PMC5443447 DOI: 10.3201/eid2306.161946] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In 2015 and 2016, we observed 15 malformed calves that were exposed to
intrauterine infection with Shamonda virus, a Simbu serogroup orthobunyavirus,
in Japan. Characteristic manifestations were arthrogryposis and gross lesions in
the central nervous system. Our results indicate that this arbovirus should be
considered a teratogenic virus in ruminants.
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35
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Putkuri N, Kantele A, Levanov L, Kivistö I, Brummer-Korvenkontio M, Vaheri A, Vapalahti O. Acute Human Inkoo and Chatanga Virus Infections, Finland. Emerg Infect Dis 2016; 22:810-7. [PMID: 27088268 PMCID: PMC4861510 DOI: 10.3201/eid2205.151015] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Most cases appeared to be subclinical, but a few patients, usually children, required hospitalization. Inkoo virus (INKV) and Chatanga virus (CHATV), which are circulating in Finland, are mosquitoborne California serogroup orthobunyaviruses that have a high seroprevalence among humans. Worldwide, INKV infection has been poorly described, and CHATV infection has been unknown. Using serum samples collected in Finland from 7,961 patients suspected of having viral neurologic disease or Puumala virus infection during the summers of 2001–2013, we analyzed the samples to detect California serogroup infections. IgM seropositivity revealed 17 acute infections, and cross-neutralization tests confirmed presence of INKV or CHATV infections. All children (<16 years of age) with INKV infection were hospitalized; adults were outpatients with mild disease, except for 1 who was hospitalized with CHATV infection. Symptoms included fever, influenza-like illness, nausea or vomiting, disorientation, nuchal rigidity, headache, drowsiness, and seizures. Although many INKV and CHATV infections appear to be subclinical, these viruses can cause more severe disease, especially in children.
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36
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Hedil M, Kormelink R. Viral RNA Silencing Suppression: The Enigma of Bunyavirus NSs Proteins. Viruses 2016; 8:v8070208. [PMID: 27455310 PMCID: PMC4974542 DOI: 10.3390/v8070208] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/18/2016] [Accepted: 07/19/2016] [Indexed: 12/21/2022] Open
Abstract
The Bunyaviridae is a family of arboviruses including both plant- and vertebrate-infecting representatives. The Tospovirus genus accommodates plant-infecting bunyaviruses, which not only replicate in their plant host, but also in their insect thrips vector during persistent propagative transmission. For this reason, they are generally assumed to encounter antiviral RNA silencing in plants and insects. Here we present an overview on how tospovirus nonstructural NSs protein counteracts antiviral RNA silencing in plants and what is known so far in insects. Like tospoviruses, members of the related vertebrate-infecting bunyaviruses classified in the genera Orthobunyavirus, Hantavirus and Phlebovirus also code for a NSs protein. However, for none of them RNA silencing suppressor activity has been unambiguously demonstrated in neither vertebrate host nor arthropod vector. The second part of this review will briefly describe the role of these NSs proteins in modulation of innate immune responses in mammals and elaborate on a hypothetical scenario to explain if and how NSs proteins from vertebrate-infecting bunyaviruses affect RNA silencing. If so, why this discovery has been hampered so far.
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Affiliation(s)
- Marcio Hedil
- Laboratory of Virology, Department of Plant Sciences, Wageningen University, Wageningen, 6708PB, The Netherlands.
| | - Richard Kormelink
- Laboratory of Virology, Department of Plant Sciences, Wageningen University, Wageningen, 6708PB, The Netherlands.
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37
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38
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Abstract
Schmallenberg virus (SBV) emerged in Germany in 2011, spread rapidly across Europe, and almost disappeared in 2013. However, since late summer 2014, new cases have occurred in adult cattle. Full-genome analysis revealed some amino acid substitution differences from the first SBV sample. Viremia developed in experimentally infected sheep and cattle for 4-6 days.
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39
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Shchetinin AM, Lvov DK, Deriabin PG, Botikov AG, Gitelman AK, Kuhn JH, Alkhovsky SV. Genetic and Phylogenetic Characterization of Tataguine and Witwatersrand Viruses and Other Orthobunyaviruses of the Anopheles A, Capim, Guamá, Koongol, Mapputta, Tete, and Turlock Serogroups. Viruses 2015; 7:5987-6008. [PMID: 26610546 PMCID: PMC4664991 DOI: 10.3390/v7112918] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/22/2015] [Accepted: 11/07/2015] [Indexed: 01/12/2023] Open
Abstract
The family Bunyaviridae has more than 530 members that are distributed among five genera or remain to be classified. The genus Orthobunyavirus is the most diverse bunyaviral genus with more than 220 viruses that have been assigned to more than 18 serogroups based on serological cross-reactions and limited molecular-biological characterization. Sequence information for all three orthobunyaviral genome segments is only available for viruses belonging to the Bunyamwera, Bwamba/Pongola, California encephalitis, Gamboa, Group C, Mapputta, Nyando, and Simbu serogroups. Here we present coding-complete sequences for all three genome segments of 15 orthobunyaviruses belonging to the Anopheles A, Capim, Guamá, Kongool, Tete, and Turlock serogroups, and of two unclassified bunyaviruses previously not known to be orthobunyaviruses (Tataguine and Witwatersrand viruses). Using those sequence data, we established the most comprehensive phylogeny of the Orthobunyavirus genus to date, now covering 15 serogroups. Our results emphasize the high genetic diversity of orthobunyaviruses and reveal that the presence of the small nonstructural protein (NSs)-encoding open reading frame is not as common in orthobunyavirus genomes as previously thought.
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Affiliation(s)
- Alexey M Shchetinin
- D.I. Ivanovsky Institute of Virology, Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098, Moscow, Russia.
| | - Dmitry K Lvov
- D.I. Ivanovsky Institute of Virology, Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098, Moscow, Russia.
| | - Petr G Deriabin
- D.I. Ivanovsky Institute of Virology, Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098, Moscow, Russia.
| | - Andrey G Botikov
- D.I. Ivanovsky Institute of Virology, Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098, Moscow, Russia.
| | - Asya K Gitelman
- D.I. Ivanovsky Institute of Virology, Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098, Moscow, Russia.
| | - Jens H Kuhn
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Fort Detrick, Frederick, MD 21702, USA.
| | - Sergey V Alkhovsky
- D.I. Ivanovsky Institute of Virology, Gamaleya Federal Research Center for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, 123098, Moscow, Russia.
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40
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Abstract
Trivittatus virus (family Bunyaviridae, genus Orthobunyavirus) represents an important genetic intermediate between the California encephalitis group and the Bwamba/Pongola and Nyando groups. Here, we report the first complete genome sequence of the prototype (Eklund) strain, isolated in 1948, which, interestingly, shows only a few differences when compared to partial sequences of modern strains.
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Affiliation(s)
- Allison Groseth
- Laboratory of Virology, Molecular Virology and Host-Pathogen Interactions Unit, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, 903 South 4th Street, Hamilton, MT, 59840, USA
| | - Veronica Vine
- Laboratory of Virology, Molecular Virology and Host-Pathogen Interactions Unit, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, 903 South 4th Street, Hamilton, MT, 59840, USA
| | - Carla Weisend
- Laboratory of Virology, Molecular Virology and Host-Pathogen Interactions Unit, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, 903 South 4th Street, Hamilton, MT, 59840, USA
| | - Hideki Ebihara
- Laboratory of Virology, Molecular Virology and Host-Pathogen Interactions Unit, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, 903 South 4th Street, Hamilton, MT, 59840, USA.
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41
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Cardoso BF, Serra OP, Heinen LBDS, Zuchi N, de Souza VC, Naveca FG, dos Santos MAM, Slhessarenko RD. Detection of Oropouche virus segment S in patients and inCulex quinquefasciatus in the state of Mato Grosso, Brazil. Mem Inst Oswaldo Cruz 2015; 110:745-54. [PMID: 26517653 PMCID: PMC4667577 DOI: 10.1590/0074-02760150123] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 08/06/2015] [Indexed: 01/17/2023] Open
Abstract
This study aimed to investigate the circulation of Orthobunyavirus species in the state of Mato Grosso (MT) Brazil. During a dengue outbreak in 2011/2012, 529 serum samples were collected from patients with acute febrile illness with symptoms for up to five days and 387 pools of female Culex quinquefasciatus captured in 2013 were subjected to nested-reverse transcription-polymerase chain reaction for segment S of the Simbu serogroup followed by nucleotide sequencing and virus isolation in Vero cells. Patients (5/529; 0.9%) from Cuiabá (n = 3), Várzea Grande (n = 1) and Nova Mutum (n = 1) municipalities were positive for the S segment of Oropouche virus (OROV). Additionally, eight/387 Cx. quinquefasciatus pools were positive for the segment, with a minimum infection rate of 2.3. Phylogenetic analysis indicated that all the samples belong to the subgenotype Ia, presenting high homology with OROV strains obtained from humans and animals in the Brazilian Amazon. The present paper reports the first detection of an Orthobunyavirus, possibly OROV, in patients and in Cx. quinquefasciatus mosquitoes in MT. This finding reinforces the notion that arboviruses frequently reported in the Amazon Region circulate sporadically in MT during dengue outbreaks.
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Affiliation(s)
- Belgath Fernandes Cardoso
- Universidade Federal de Mato Grosso, Faculdade de Medicina, Programa de
Pós-Graduação em Ciências da Saúde, Cuiabá, MT, Brasil
| | - Otacília Pereira Serra
- Universidade Federal de Mato Grosso, Faculdade de Medicina, Programa de
Pós-Graduação em Ciências da Saúde, Cuiabá, MT, Brasil
| | - Letícia Borges da Silva Heinen
- Universidade Federal de Mato Grosso, Faculdade de Medicina, Programa de
Pós-Graduação em Ciências da Saúde, Cuiabá, MT, Brasil
| | - Nayara Zuchi
- Universidade Federal de Mato Grosso, Faculdade de Medicina, Programa de
Pós-Graduação em Ciências da Saúde, Cuiabá, MT, Brasil
| | | | | | | | - Renata Dezengrini Slhessarenko
- Universidade Federal de Mato Grosso, Faculdade de Medicina, Programa de
Pós-Graduação em Ciências da Saúde, Cuiabá, MT, Brasil
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42
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Kato T, Shirafuji H, Tanaka S, Sato M, Yamakawa M, Tsuda T, Yanase T. Bovine Arboviruses in Culicoides Biting Midges and Sentinel Cattle in Southern Japan from 2003 to 2013. Transbound Emerg Dis 2015; 63:e160-e172. [PMID: 25597441 DOI: 10.1111/tbed.12324] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Indexed: 12/30/2022]
Abstract
Epizootic congenital abnormalities, encephalomyelitis and febrile illnesses in cattle caused by arthropod-borne viruses (arboviruses) are prevalent in Japan. Causative viruses including orthobunyaviruses, orbiviruses and rhabdovirus are thought to be transmitted by Culicoides biting midges. Recently, the incursions of several arboviruses, potentially Culicoides-borne, were newly confirmed in Japan. However, their spread pattern and exact vector species are currently uncertain. Attempts to isolate arboviruses from Culicoides biting midges and sentinel cattle were conducted in Kagoshima, located at the southernmost end of the main islands of Japan, a potentially high-risk area for incursion of arboviral diseases and outbreak of endemic ones. Seventy-eight isolates comprising Akabane, Peaton and Sathuperi viruses of the genus Orthobunyavirus of the family Bunyaviridae, bluetongue virus serotype 16, D'Aguilar virus, Bunyip Creek virus and epizootic haemorrhagic disease virus serotype 1 of the genus Orbivirus of the family Reoviridae, a potentially novel rhabdovirus of the genus Ephemerovirus and unidentified orbivirus-like viruses were obtained from Culicoides biting midges and sentinel cattle between 2003 and 2013. Akabane, Sathuperi, D'Aguilar and Bunyip Creek viruses were selectively isolated from Culicoides oxystoma, suggesting this vector's responsibility for these arbovirus outbreaks. The results of virus isolation also implied that C. tainanus, C. jacobsoni and C. punctatus are competent for the transmission of bluetongue virus serotype 16, Peaton virus and epizootic haemorrhagic disease virus serotype 1, respectively. Our monitoring in Culicoides biting midges and sentinel cattle detected the circulation of Akabane virus just prior to the accumulations of bovine congenital abnormalities and encephalomyelitis by it around study sites in 2003, 2006, 2008 and 2013. Silent circulations of the other arboviruses, including potentially new viruses, were also detected during the study period.
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Affiliation(s)
- T Kato
- Kyushu Research Station, National Institute of Animal Health, NARO, Kagoshima, Japan
| | - H Shirafuji
- Kyushu Research Station, National Institute of Animal Health, NARO, Kagoshima, Japan
| | - S Tanaka
- Kyushu Research Station, National Institute of Animal Health, NARO, Kagoshima, Japan
| | - M Sato
- National Institute of Animal Health, NARO, Tsukuba, Japan
| | - M Yamakawa
- National Institute of Animal Health, NARO, Tsukuba, Japan
| | - T Tsuda
- National Institute of Animal Health, NARO, Tsukuba, Japan
| | - T Yanase
- Kyushu Research Station, National Institute of Animal Health, NARO, Kagoshima, Japan.
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43
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Peperkamp NH, Luttikholt SJ, Dijkman R, Vos JH, Junker K, Greijdanus S, Roumen MP, van Garderen E, Meertens N, van Maanen C, Lievaart K, van Wuyckhuise L, Wouda W. Ovine and Bovine Congenital Abnormalities Associated With Intrauterine Infection With Schmallenberg Virus. Vet Pathol 2014; 52:1057-66. [PMID: 25428409 DOI: 10.1177/0300985814560231] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In December 2011, a previously unknown congenital syndrome of arthrogryposis and hydranencephaly in sheep and cattle appeared in the Netherlands as an emerging epizootic due to Schmallenberg virus (SBV). Gross lesions in 102 lambs and 204 calves included porencephaly, hydranencephaly, cerebellar dysplasia and dysplasia of the brainstem and spinal cord, a flattened skull with brachygnathia inferior, arthrogryposis, and vertebral column malformations. Microscopic lesions in the central nervous system showed rarefaction and cavitation in the white matter, as well as degeneration, necrosis, and loss of neurons in the gray matter. Brain and spinal cord lesions were more severe in lambs than in calves. Ovine and bovine cases examined early in the outbreak showed encephalomyelitis. SBV infection was confirmed by real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) in brain samples in 46 of 102 lambs (45%) and in 32 of 204 calves (16%). Immunohistochemistry, performed on tissue samples from 18 RT-qPCR-positive lambs, confirmed the presence of bunyaviral antigen in neurons of the brain in 16 cases. SBV antibodies were detected by enzyme-linked immunosorbent assay in fetal blood in 56 of 61 sampled ovine cases (92%). In a virus neutralization test, all tested dams of affected newborns, 46 ewes and 190 cows, were seropositive. Compared with other teratogenic viral infections, the pathogenesis and lesions of SBV in sheep and cattle fetuses are similar to those of other ruminant orthobunyaviruses. However, the loss of spinal ventral motor neurons and their tracts, resulting in micromyelia, distinguishes SBV infection from other viral central nervous system lesions in newborn ruminants.
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Affiliation(s)
- N H Peperkamp
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - S J Luttikholt
- Department of Small Ruminant Health, GD Animal Health, Deventer, The Netherlands
| | - R Dijkman
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - J H Vos
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - K Junker
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - S Greijdanus
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - M P Roumen
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - E van Garderen
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - N Meertens
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
| | - C van Maanen
- Department of Diagnostic Research and Epidemiology, GD Animal Health, Deventer, The Netherlands
| | - K Lievaart
- Department of Small Ruminant Health, GD Animal Health, Deventer, The Netherlands
| | - L van Wuyckhuise
- Department of Ruminant Health, GD Animal Health, Deventer, The Netherlands
| | - W Wouda
- Department of Pathology, GD Animal Health, Deventer, The Netherlands
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Dong H, Li P, Böttcher B, Elliott RM, Dong C. Crystal structure of Schmallenberg orthobunyavirus nucleoprotein-RNA complex reveals a novel RNA sequestration mechanism. RNA 2013; 19:1129-1136. [PMID: 23798666 PMCID: PMC3708532 DOI: 10.1261/rna.039057.113] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 05/31/2013] [Indexed: 06/02/2023]
Abstract
Schmallenberg virus (SBV) is a newly emerged orthobunyavirus (family Bunyaviridae) that has caused severe disease in the offspring of farm animals across Europe. Like all orthobunyaviruses, SBV contains a tripartite negative-sense RNA genome that is encapsidated by the viral nucleocapsid (N) protein in the form of a ribonucleoprotein complex (RNP). We recently reported the three-dimensional structure of SBV N that revealed a novel fold. Here we report the crystal structure of the SBV N protein in complex with a 42-nt-long RNA to 2.16 Å resolution. The complex comprises a tetramer of N that encapsidates the RNA as a cross-shape inside the protein ring structure, with each protomer bound to 11 ribonucleotides. Eight bases are bound in the positively charged cleft between the N- and C-terminal domains of N, and three bases are shielded by the extended N-terminal arm. SBV N appears to sequester RNA using a different mechanism compared with the nucleoproteins of other negative-sense RNA viruses. Furthermore, the structure suggests that RNA binding results in conformational changes of some residues in the RNA-binding cleft and the N- and C-terminal arms. Our results provide new insights into the novel mechanism of RNA encapsidation by orthobunyaviruses.
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Affiliation(s)
- Haohao Dong
- Biomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park NR4 7TJ, United Kingdom
- Biomedical Sciences Research Complex, School of Biology, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Ping Li
- Biomedical Sciences Research Complex, School of Biology, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Bettina Böttcher
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom
| | - Richard M. Elliott
- Biomedical Sciences Research Complex, School of Biology, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Changjiang Dong
- Biomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park NR4 7TJ, United Kingdom
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Hang J, Forshey BM, Kochel TJ, Li T, Solórzano VF, Halsey ES, Kuschner RA. Random amplification and pyrosequencing for identification of novel viral genome sequences. J Biomol Tech 2012; 23:4-10. [PMID: 22468136 DOI: 10.7171/jbt.12-2301-001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
ssRNA viruses have high levels of genomic divergence, which can lead to difficulty in genomic characterization of new viruses using traditional PCR amplification and sequencing methods. In this study, random reverse transcription, anchored random PCR amplification, and high-throughput pyrosequencing were used to identify orthobunyavirus sequences from total RNA extracted from viral cultures of acute febrile illness specimens. Draft genome sequence for the orthobunyavirus L segment was assembled and sequentially extended using de novo assembly contigs from pyrosequencing reads and orthobunyavirus sequences in GenBank as guidance. Accuracy and continuous coverage were achieved by mapping all reads to the L segment draft sequence. Subsequently, RT-PCR and Sanger sequencing were used to complete the genome sequence. The complete L segment was found to be 6936 bases in length, encoding a 2248-aa putative RNA polymerase. The identified L segment was distinct from previously published South American orthobunyaviruses, sharing 63% and 54% identity at the nucleotide and amino acid level, respectively, with the complete Oropouche virus L segment and 73% and 81% identity at the nucleotide and amino acid level, respectively, with a partial Caraparu virus L segment. The result demonstrated the effectiveness of a sequence-independent amplification and next-generation sequencing approach for obtaining complete viral genomes from total nucleic acid extracts and its use in pathogen discovery.
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Affiliation(s)
- Jun Hang
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910, USA.
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