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Mohd Jaafar F, Belhouchet M, Monsion B, Bell-Sakyi L, Mertens PPC, Attoui H. Orbivirus NS4 Proteins Play Multiple Roles to Dampen Cellular Responses. Viruses 2023; 15:1908. [PMID: 37766314 PMCID: PMC10535134 DOI: 10.3390/v15091908] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Non-structural protein 4 (NS4) of insect-borne and tick-borne orbiviruses is encoded by genome segment 9, from a secondary open reading frame. Though a protein dispensable for bluetongue virus (BTV) replication, it has been shown to counter the interferon response in cells infected with BTV or African horse sickness virus. We further explored the functional role(s) of NS4 proteins of BTV and the tick-borne Great Island virus (GIV). We show that NS4 of BTV or GIV helps an E3L deletion mutant of vaccinia virus to replicate efficiently in interferon-treated cells, further confirming the role of NS4 as an interferon antagonist. Our results indicate that ectopically expressed NS4 of BTV localised with caspase 3 within the nucleus and was found in a protein complex with active caspase 3 in a pull-down assay. Previous studies have shown that pro-apoptotic caspases (including caspase 3) suppress type I interferon response by cleaving mediators involved in interferon signalling. Our data suggest that orbivirus NS4 plays a role in modulating the apoptotic process and/or regulating the interferon response in mammalian cells, thus acting as a virulence factor in pathogenesis.
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Affiliation(s)
- Fauziah Mohd Jaafar
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, 94700 Maisons-Alfort, France;
| | - Mourad Belhouchet
- Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, Oxford OX3 7BN, UK;
| | - Baptiste Monsion
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, 94700 Maisons-Alfort, France;
| | - Lesley Bell-Sakyi
- Department of Infection Biology and Microbiomes, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, 146 Brownlow Hill, Liverpool L3 5RF, UK;
| | - Peter P. C. Mertens
- One Virology, The Wolfson Centre for Global Virus Research, School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK;
| | - Houssam Attoui
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, 94700 Maisons-Alfort, France;
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Monsion B, Mohd Jaafar F, Mertens PPC, Attoui H. Uncovering the Underlying Mechanisms Blocking Replication of Bluetongue Virus Serotype 26 (BTV-26) in Culicoides Cells. Biomolecules 2023; 13:878. [PMID: 37371457 DOI: 10.3390/biom13060878] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/05/2023] [Accepted: 05/18/2023] [Indexed: 06/29/2023] Open
Abstract
At least 12 serotypes of 'atypical' bluetongue virus (BTV-25 to BTV-36) have been identified to date. These atypical serotypes fail to infect/replicate in Culicoides-derived cell lines and/or adult Culicoides vectors and hence can no longer be transmitted by these vectors. They appear to be horizontally transmitted from infected to in-contact ruminants, although the route(s) of infection remain to be identified. Viral genome segments 1, 2 and 3 (Seg-1, Seg2 and Seg-3) of BTV-26 were identified as involved in blocking virus replication in KC cells. We have developed Culicoides-specific expression plasmids, which we used in transfected insect cells to assess the stability of viral mRNAs and protein expression from full-length open reading frames of Seg-1, -2 and -3 of BTV-1 (a Culicoides-vectored BTV) or BTV-26. Our results indicate that the blocked replication of BTV-26 in KC cells is not due to an RNAi response, which would lead to rapid degradation of viral mRNAs. A combination of degradation/poor expression and/or modification of the proteins encoded by these segments appears to drive the failure of BTV-26 core/whole virus-particles to assemble and replicate effectively in Culicoides cells.
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Affiliation(s)
- Baptiste Monsion
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Fauziah Mohd Jaafar
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Peter P C Mertens
- One Virology, The Wolfson Centre for Global Virus Research, School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, Leicestershire, UK
| | - Houssam Attoui
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
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Attoui H, Mohd Jaafar F, Monsion B, Klonjkowski B, Reid E, Fay PC, Saunders K, Lomonossoff G, Haig D, Mertens PPC. Increased Clinical Signs and Mortality in IFNAR (-/-) Mice Immunised with the Bluetongue Virus Outer-Capsid Proteins VP2 or VP5, after Challenge with an Attenuated Heterologous Serotype. Pathogens 2023; 12:pathogens12040602. [PMID: 37111488 PMCID: PMC10141489 DOI: 10.3390/pathogens12040602] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/06/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Bluetongue is an economically important disease of domesticated and wild ruminants caused by bluetongue virus (BTV). There are at least 36 different serotypes of BTV (the identity of which is determined by its outer-capsid protein VP2), most of which are transmitted by Culicoides biting midges. IFNAR(-/-) mice immunised with plant-expressed outer-capsid protein VP2 (rVP2) of BTV serotypes -1, -4 or -8, or the smaller outer-capsid protein rVP5 of BTV-10, or mock-immunised with PBS, were subsequently challenged with virulent strains of BTV-4 or BTV-8, or with an attenuated clone of BTV-1 (BTV-1RGC7). The mice that had received rVP2 generated a protective immune response against the homologous BTV serotype, reducing viraemia (as detected by qRT-PCR), the severity of clinical signs and mortality levels. No cross-serotype protection was observed after challenge with the heterologous BTV serotypes. However, the severity of clinical signs, viraemia and fatality levels after challenge with the attenuated strain of BTV-1 were all increased in mice immunised with rVP2 of BTV-4 and BTV-8, or with rVP5 of BTV10. The possibility is discussed that non-neutralising antibodies, reflecting serological relationships between the outer-capsid proteins of these different BTV serotypes, could lead to 'antibody-dependent enhancement of infection' (ADE). Such interactions could affect the epidemiology and emergence of different BTV strains in the field and would therefore be relevant to the design and implementation of vaccination campaigns.
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Affiliation(s)
- Houssam Attoui
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Fauziah Mohd Jaafar
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Baptiste Monsion
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Bernard Klonjkowski
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Elizabeth Reid
- One Virology, The Wolfson Centre for Global Virus Research, Sutton Bonington Campus, School of Veterinary Medicine and Science, University of Nottingham, Leicestershire LE12 5RD, UK
| | - Petra C Fay
- One Virology, The Wolfson Centre for Global Virus Research, Sutton Bonington Campus, School of Veterinary Medicine and Science, University of Nottingham, Leicestershire LE12 5RD, UK
| | - Keith Saunders
- John Innes Centre, Department of Biochemistry and Metabolism, Norwich NR4 7UH, UK
| | - George Lomonossoff
- John Innes Centre, Department of Biochemistry and Metabolism, Norwich NR4 7UH, UK
| | - David Haig
- One Virology, The Wolfson Centre for Global Virus Research, Sutton Bonington Campus, School of Veterinary Medicine and Science, University of Nottingham, Leicestershire LE12 5RD, UK
| | - Peter P C Mertens
- One Virology, The Wolfson Centre for Global Virus Research, Sutton Bonington Campus, School of Veterinary Medicine and Science, University of Nottingham, Leicestershire LE12 5RD, UK
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Mohd Jaafar F, Monsion B, Mertens PPC, Attoui H. Identification of Orbivirus Non-Structural Protein 5 (NS5), Its Role and Interaction with RNA/DNA in Infected Cells. Int J Mol Sci 2023; 24:ijms24076845. [PMID: 37047816 PMCID: PMC10095184 DOI: 10.3390/ijms24076845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 03/31/2023] [Indexed: 04/09/2023] Open
Abstract
Bioinformatic analyses have predicted that orbiviruses encode an additional, small non-structural protein (NS5) from a secondary open reading frame on genome segment 10. However, this protein has not previously been detected in infected mammalian or insect cells. NS5-specific antibodies were generated in mice and were used to identify NS5 synthesised in orbivirus-infected BSR cells or cells transfected with NS5 expression plasmids. Confocal microscopy shows that although NS5 accumulates in the nucleus, particularly in the nucleolus, which becomes disrupted, it also appears in the cell cytoplasm, co-localising with mitochondria. NS5 helps to prevent the degradation of ribosomal RNAs during infection and reduces host-cell protein synthesis However, it helps to extend cell viability by supporting viral protein synthesis and virus replication. Pulldown studies showed that NS5 binds to ssRNAs and supercoiled DNAs and demonstrates interactions with ZBP1, suggesting that it modulates host-cell responses.
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Affiliation(s)
- Fauziah Mohd Jaafar
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Baptiste Monsion
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
| | - Peter P. C. Mertens
- One Virology, The Wolfson Centre for Global Virus Research, School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Leicestershire LE12 5RD, UK
| | - Houssam Attoui
- UMR1161 VIROLOGIE, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France
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Matthijnssens J, Attoui H, Bányai K, Brussaard CPD, Danthi P, del Vas M, Dermody TS, Duncan R, Fāng Q, Johne R, Mertens PPC, Mohd Jaafar F, Patton JT, Sasaya T, Suzuki N, Wei T. ICTV Virus Taxonomy Profile: Spinareoviridae 2022. J Gen Virol 2022; 103. [DOI: 10.1099/jgv.0.001781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Spinareoviridae is a large family of icosahedral viruses that are usually regarded as non-enveloped with segmented (9–12 linear segments) dsRNA genomes of 23–29 kbp. Spinareovirids have a broad host range, infecting animals, fungi and plants. Some have important pathogenic potential for humans (e.g. Colorado tick fever virus), livestock (e.g. avian orthoreoviruses), fish (e.g. aquareoviruses) and plants (e.g. rice ragged stunt virus and rice black streaked dwarf virus). This is a summary of the ICTV Report on the family Spinareoviridae, which is available at ictv.global/report/spinareoviridae.
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Affiliation(s)
| | - Houssam Attoui
- National Institute for Agricultural Research (INRA), Maisons Alfort, France
| | - Krisztián Bányai
- Veterinary Medical Research Institute, Budapest, H-1143, Hungary
| | - Corina P. D. Brussaard
- NIOZ Royal Netherlands Institute for Sea Research & University of Utrecht, Texel, The Netherlands
| | | | - Mariana del Vas
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Buenos Aires, Argentina
| | - Terence S. Dermody
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Roy Duncan
- Dalhousie University, Halifax, Nova Scotia, Canada
| | - Qín Fāng
- Wuhan Institute of Virology, Wuhan, PR China
| | - Reimar Johne
- German Federal Institute for Risk Assessment, Berlin, Germany
| | | | | | | | - Takahide Sasaya
- National Agriculture and Food Research Organization, Fukuyama, Japan
| | | | - Taiyun Wei
- Fujian Agriculture and Forestry University, Fuzhou, PR China
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6
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Matthijnssens J, Attoui H, Bányai K, Brussaard CPD, Danthi P, Del Vas M, Dermody TS, Duncan R, Fāng 方勤 Q, Johne R, Mertens PPC, Mohd Jaafar F, Patton JT, Sasaya 笹谷孝英 T, Suzuki 鈴木信弘 N, Wei 魏太云 T. ICTV Virus Taxonomy Profile: Sedoreoviridae 2022. J Gen Virol 2022; 103. [PMID: 36215107 DOI: 10.1099/jgv.0.001782] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [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: 01/17/2023] Open
Abstract
Sedoreoviridae is a large family of icosahedral viruses that are usually regarded as non-enveloped with segmented (10-12 linear segments) dsRNA genomes of 18-26 kbp. Sedoreovirids have a broad host range, infecting mammals, birds, crustaceans, arthropods, algae and plants. Some of them have important pathogenic potential for humans (e.g. rotavirus A), livestock (e.g. bluetongue virus) and plants (e.g. rice dwarf virus). This is a summary of the ICTV Report on the family Sedoreoviridae, which is available at ictv.global/report/sedoreoviridae.
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Affiliation(s)
| | - Houssam Attoui
- National Institute for Agricultural Research (INRA), Maisons Alfort, France
| | | | - Corina P D Brussaard
- NIOZ Royal Netherlands Institute for Sea Research & University of Utrecht, Texel, The Netherlands
| | | | - Mariana Del Vas
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Buenos Aires, Argentina
| | - Terence S Dermody
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Roy Duncan
- Dalhousie University, Halifax, Nova Scotia, Canada
| | - Qín Fāng 方勤
- Wuhan Institute of Virology, Wuhan, PR China
| | - Reimar Johne
- German Federal Institute for Risk Assessment, Berlin, Germany
| | | | | | | | | | | | - Taiyun Wei 魏太云
- Fujian Agriculture and Forestry University, Fuzhou, PR China
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7
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Fairbanks EL, Brennan ML, Mertens PPC, Tildesley MJ, Daly JM. Re-parameterisation of a mathematical model of African horse sickness virus using data from a systematic literature search. Transbound Emerg Dis 2021; 69:e671-e681. [PMID: 34921513 PMCID: PMC9543668 DOI: 10.1111/tbed.14420] [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] [Received: 07/20/2021] [Revised: 09/29/2021] [Accepted: 09/29/2021] [Indexed: 11/26/2022]
Abstract
African horse sickness (AHS) is a vector‐borne disease transmitted by Culicoides spp., endemic to sub‐Saharan Africa. There have been many examples of historic and recent outbreaks in the Middle East, Asia and Europe. However, not much is known about infection dynamics and outbreak potential in these naive populations. In order to better inform a previously published ordinary differential equation model, we performed a systematic literature search to identify studies documenting experimental infection of naive (control) equids in vaccination trials. Data on the time until the onset of viraemia, clinical signs and death after experimental infection of a naive equid and duration of viraemia were extracted. The time to viraemia was 4.6 days and the time to clinical signs was 4.9 days, longer than the previously estimated latent period of 3.7 days. The infectious periods of animals that died/were euthanized or survived were found to be 3.9 and 8.7 days, whereas previous estimations were 4.4 and 6 days, respectively. The case fatality was also found to be higher than previous estimations. The updated parameter values (along with other more recently published estimates from literature) resulted in an increase in the number of host deaths, decrease in the duration of the outbreak and greater prevalence in vectors.
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Affiliation(s)
- Emma L Fairbanks
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, LE12 5RD, UK
| | - Marnie L Brennan
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, LE12 5RD, UK
| | - Peter P C Mertens
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, LE12 5RD, UK
| | - Michael J Tildesley
- The Zeeman Institute for Systems Biology & Infectious Disease Epidemiology Research, School of Life Sciences and Mathematics Institute, University of Warwick, Coventry, CV4 7AL, UK
| | - Janet M Daly
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, LE12 5RD, UK
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Fay PC, Mohd Jaafar F, Batten C, Attoui H, Saunders K, Lomonossoff GP, Reid E, Horton D, Maan S, Haig D, Daly JM, Mertens PPC. Serological Cross-Reactions between Expressed VP2 Proteins from Different Bluetongue Virus Serotypes. Viruses 2021; 13:1455. [PMID: 34452321 PMCID: PMC8402635 DOI: 10.3390/v13081455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 06/05/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 01/26/2023] Open
Abstract
Bluetongue (BT) is a severe and economically important disease of ruminants that is widely distributed around the world, caused by the bluetongue virus (BTV). More than 28 different BTV serotypes have been identified in serum neutralisation tests (SNT), which, along with geographic variants (topotypes) within each serotype, reflect differences in BTV outer-capsid protein VP2. VP2 is the primary target for neutralising antibodies, although the basis for cross-reactions and serological variations between and within BTV serotypes is poorly understood. Recombinant BTV VP2 proteins (rVP2) were expressed in Nicotiana benthamiana, based on sequence data for isolates of thirteen BTV serotypes (primarily from Europe), including three 'novel' serotypes (BTV-25, -26 and -27) and alternative topotypes of four serotypes. Cross-reactions within and between these viruses were explored using rabbit anti-rVP2 sera and post BTV-infection sheep reference-antisera, in I-ELISA (with rVP2 target antigens) and SNT (with reference strains of BTV-1 to -24, -26 and -27). Strong reactions were generally detected with homologous rVP2 proteins or virus strains/serotypes. The sheep antisera were largely serotype-specific in SNT, but more cross-reactive by ELISA. Rabbit antisera were more cross-reactive in SNT, and showed widespread, high titre cross-reactions against homologous and heterologous rVP2 proteins in ELISA. Results were analysed and visualised by antigenic cartography, showing closer relationships in some, but not all cases, between VP2 topotypes within the same serotype, and between serotypes belonging to the same 'VP2 nucleotype'.
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Affiliation(s)
- Petra C. Fay
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough LE12 5RD, UK; (P.C.F.); (E.R.); (D.H.); (J.M.D.)
- The Pirbright Institute, Surrey, Woking GU24 ONF, UK;
| | - Fauziah Mohd Jaafar
- UMR VIROLOGIE 1161, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France; (F.M.J.); (H.A.)
| | - Carrie Batten
- The Pirbright Institute, Surrey, Woking GU24 ONF, UK;
| | - Houssam Attoui
- UMR VIROLOGIE 1161, INRAE, Ecole Nationale Vétérinaire d’Alfort, ANSES, Université Paris-Est, F-94700 Maisons-Alfort, France; (F.M.J.); (H.A.)
| | - Keith Saunders
- John Innes Centre, Department of Biochemistry and Metabolism, Norwich Research Park, Norwich NR4 7UH, UK; (K.S.); (G.P.L.)
| | - George P. Lomonossoff
- John Innes Centre, Department of Biochemistry and Metabolism, Norwich Research Park, Norwich NR4 7UH, UK; (K.S.); (G.P.L.)
| | - Elizabeth Reid
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough LE12 5RD, UK; (P.C.F.); (E.R.); (D.H.); (J.M.D.)
| | - Daniel Horton
- Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford GU2 7XH, UK;
| | - Sushila Maan
- Department of Animal Biotechnology, Lala Lajpat Rai University of Veterinary & Animal Sciences, Hisar 125004, India;
| | - David Haig
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough LE12 5RD, UK; (P.C.F.); (E.R.); (D.H.); (J.M.D.)
| | - Janet M. Daly
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough LE12 5RD, UK; (P.C.F.); (E.R.); (D.H.); (J.M.D.)
| | - Peter P. C. Mertens
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough LE12 5RD, UK; (P.C.F.); (E.R.); (D.H.); (J.M.D.)
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9
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Pascall DJ, Nomikou K, Bréard E, Zientara S, Filipe ADS, Hoffmann B, Jacquot M, Singer JB, De Clercq K, Bøtner A, Sailleau C, Viarouge C, Batten C, Puggioni G, Ligios C, Savini G, van Rijn PA, Mertens PPC, Biek R, Palmarini M. "Frozen evolution" of an RNA virus suggests accidental release as a potential cause of arbovirus re-emergence. PLoS Biol 2020; 18:e3000673. [PMID: 32343693 PMCID: PMC7188197 DOI: 10.1371/journal.pbio.3000673] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 03/24/2020] [Indexed: 12/12/2022] Open
Abstract
The mechanisms underlying virus emergence are rarely well understood, making the appearance of outbreaks largely unpredictable. Bluetongue virus serotype 8 (BTV-8), an arthropod-borne virus of ruminants, emerged in livestock in northern Europe in 2006, spreading to most European countries by 2009 and causing losses of billions of euros. Although the outbreak was successfully controlled through vaccination by early 2010, puzzlingly, a closely related BTV-8 strain re-emerged in France in 2015, triggering a second outbreak that is still ongoing. The origin of this virus and the mechanisms underlying its re-emergence are unknown. Here, we performed phylogenetic analyses of 164 whole BTV-8 genomes sampled throughout the two outbreaks. We demonstrate consistent clock-like virus evolution during both epizootics but found negligible evolutionary change between them. We estimate that the ancestor of the second outbreak dates from the height of the first outbreak in 2008. This implies that the virus had not been replicating for multiple years prior to its re-emergence in 2015. Given the absence of any known natural mechanism that could explain BTV-8 persistence over this long period without replication, we hypothesise that the second outbreak could have been initiated by accidental exposure of livestock to frozen material contaminated with virus from approximately 2008. Our work highlights new targets for pathogen surveillance programmes in livestock and illustrates the power of genomic epidemiology to identify pathways of infectious disease emergence.
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Affiliation(s)
- David J. Pascall
- Institute of Biodiversity, Animal Health and Comparative Medicine, Boyd Orr Centre for Population and Ecosystem Health, University of Glasgow, Glasgow, United Kingdom
| | - Kyriaki Nomikou
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
- The School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Leicestershire, United Kingdom
| | - Emmanuel Bréard
- UMR Virologie, INRA, École Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale d’Alfort, ANSES, Université Paris-Est, Maisons-Alfort, France
| | - Stephan Zientara
- UMR Virologie, INRA, École Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale d’Alfort, ANSES, Université Paris-Est, Maisons-Alfort, France
| | - Ana da Silva Filipe
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Bernd Hoffmann
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Maude Jacquot
- Spatial Epidemiology Lab (SpELL), University of Brussels, Brussels, Belgium
- INRAE-VetAgro Sup, UMR Epidemiology of Animal and Zoonotic Diseases, Saint Genès-Champanelle, France
| | - Joshua B. Singer
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Kris De Clercq
- Infectious Diseases in Animals, Exotic and Particular Diseases, Sciensano, Brussels, Belgium
| | - Anette Bøtner
- Section for Veterinary Clinical Microbiology, Department of Veterinary and Animal Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Copenhagen, Denmark
| | - Corinne Sailleau
- UMR Virologie, INRA, École Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale d’Alfort, ANSES, Université Paris-Est, Maisons-Alfort, France
| | - Cyril Viarouge
- UMR Virologie, INRA, École Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale d’Alfort, ANSES, Université Paris-Est, Maisons-Alfort, France
| | - Carrie Batten
- The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
| | - Giantonella Puggioni
- Istituto Zooprofilattico Sperimentale della Sardegna, Via Duca degli Abruzzi, Sassari, Italy
| | - Ciriaco Ligios
- Istituto Zooprofilattico Sperimentale della Sardegna, Via Duca degli Abruzzi, Sassari, Italy
| | - Giovanni Savini
- Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise (IZSAM), Teramo, Italy
| | - Piet A. van Rijn
- Department of Virology, Wageningen Bioveterinary Research (WBVR), Lelystad, the Netherlands
- Department of Biochemistry, Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - Peter P. C. Mertens
- The School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Leicestershire, United Kingdom
- The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
| | - Roman Biek
- Institute of Biodiversity, Animal Health and Comparative Medicine, Boyd Orr Centre for Population and Ecosystem Health, University of Glasgow, Glasgow, United Kingdom
| | - Massimo Palmarini
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
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10
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Stevens LM, Moffat K, Cooke L, Nomikou K, Mertens PPC, Jackson T, Darpel KE. A low-passage insect-cell isolate of bluetongue virus uses a macropinocytosis-like entry pathway to infect natural target cells derived from the bovine host. J Gen Virol 2019; 100:568-582. [PMID: 30843784 DOI: 10.1099/jgv.0.001240] [Citation(s) in RCA: 6] [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] [Indexed: 01/12/2023] Open
Abstract
Bluetongue virus (BTV) causes an economically important disease in domestic and wildlife ruminants and is transmitted by Culicoides biting midges. In ruminants, BTV has a wide cell tropism that includes endothelial cells of vascular and lymphatic vessels as important cell targets for virus replication, and several cell types of the immune system including monocytes, macrophages and dendritic cells. Thus, cell-entry represents a particular challenge for BTV as it infects many different cell types in widely diverse vertebrate and invertebrate hosts. Improved understanding of BTV cell-entry could lead to novel antiviral approaches that can block virus transmission from cell to cell between its invertebrate and vertebrate hosts. Here, we have investigated BTV cell-entry using endothelial cells derived from the natural bovine host (BFA cells) and purified whole virus particles of a low-passage, insect-cell isolate of a virulent strain of BTV-1. Our results show that the main entry pathway for infection of BFA cells is dependent on actin and dynamin, and shares certain characteristics with macropinocytosis. The ability to use a macropinocytosis-like entry route could explain the diverse cell tropism of BTV and contribute to the efficiency of transmission between vertebrate and invertebrate hosts.
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Affiliation(s)
- Lisa M Stevens
- 1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK.,2University of Surrey, Guildford, Surrey, GU2 7XH, UK.,‡Present address: Animal and Plant Health Agency, Woodham Lane, New Haw, KT15 3NB, UK
| | - Katy Moffat
- 1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Lyndsay Cooke
- 1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK.,2University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Kyriaki Nomikou
- 1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK.,§Present address: School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonnington, Leicestershire, LE12 5RD, UK
| | - Peter P C Mertens
- 1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK.,§Present address: School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonnington, Leicestershire, LE12 5RD, UK
| | - Terry Jackson
- 1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
| | - Karin E Darpel
- 2University of Surrey, Guildford, Surrey, GU2 7XH, UK.,1The Pirbright Institute, Ash Road, Pirbright, GU24 0NF, UK
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11
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Brugman VA, Medlock JM, Logan JG, Wilson AJ, Lindsay SW, Fooks AR, Mertens PPC, Johnson N, Carpenter ST. Bird-biting mosquitoes on farms in southern England. Vet Rec 2018; 183:474. [PMID: 30099408 PMCID: PMC6227795 DOI: 10.1136/vr.104830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 11/25/2022]
Affiliation(s)
- Victor Albert Brugman
- Entomology group, The Pirbright Institute, Woking, UK.,Department of Disease Control, London School of Hygiene and Tropical Medicine, London, UK
| | - Jolyon M Medlock
- Department of Medical Entomology & Zoonoses Ecology, Emergency Response Department, Public Health England, Salisbury, UK.,Health Protection Research Unit in Emerging Infections & Zoonoses, Salisbury, UK
| | - James G Logan
- Department of Disease Control, London School of Hygiene and Tropical Medicine, London, UK
| | | | - Steve W Lindsay
- Department of Disease Control, London School of Hygiene and Tropical Medicine, London, UK.,Department of Biosciences, Durham University, Durham, UK
| | - Anthony R Fooks
- Animal and Plant Health Agency, Weybridge, UK.,Department of Clinical Infection, Microbiology and Immunology, University of Liverpool, Liverpool, UK
| | - Peter P C Mertens
- Entomology group, The Pirbright Institute, Woking, UK.,School of Veterinary Medicine and Science, The University of Nottingham, Sutton Bonington, UK
| | - Nicholas Johnson
- Animal and Plant Health Agency, Weybridge, UK.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
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12
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Conte A, Daniels P, Goffredo M, Ostlund EN, Di Lorenzo A, Savini L, Tora S, Lubisi BA, Calistri P, Bruno R, Di Sabatino D, Ippoliti C, Monaco F, Mertens PPC, Lorusso A, Capobianco A, Ripani A, MacLachlan NJ, Savini G. OIEBTLABNET: the web-based network of the OIE Bluetongue Reference Laboratories. Vet Ital 2017; 52:187-193. [PMID: 27723026 DOI: 10.12834/vetit.583.2799.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Bluetongue (BT) is a mild to severe disease of domestic and wild ruminants caused by the Bluetongue virus (BTV) and generally transmitted by Culicoides biting midges. Its occurrence also determines a livestock trade ban in affected countries with severe economic consequences on national and international trade. For this reason, in May 2011, the OIE encouraged the OIE Reference Laboratories to establish and maintain a BT network to provide expertise and training to the OIE and OIE Member Countries for BT diagnosis, surveillance and control. The network is constantly sustained by world leading scientists in the field of virology, epidemiology, serology, entomology and vaccine development. The website, available at http://oiebtnet.izs.it/btlabnet/, hosts an Information System containing data on BTV outbreaks and strains and a WebGIS that distributes maps on BTV occurrence. In this paper we describe the applications and present the benefits derived from the use of the WebGIS in the context of BT international surveillance network.
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Affiliation(s)
- Annamaria Conte
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise 'G. Caporale' in Teramo, Italy
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13
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Brugman VA, Hernández-Triana LM, England ME, Medlock JM, Mertens PPC, Logan JG, Wilson AJ, Fooks AR, Johnson N, Carpenter S. Blood-feeding patterns of native mosquitoes and insights into their potential role as pathogen vectors in the Thames estuary region of the United Kingdom. Parasit Vectors 2017; 10:163. [PMID: 28347323 PMCID: PMC5369192 DOI: 10.1186/s13071-017-2098-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [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] [Received: 11/20/2016] [Accepted: 03/20/2017] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The range of vertebrate hosts on which species of mosquito blood-feed is an important parameter for identifying potential vectors and in assessing the risk of incursion and establishment of vector-borne pathogens. In the United Kingdom, studies of mosquito host range have collected relatively few specimens and used techniques that could only broadly identify host species. This study conducted intensive collection and analysis of mosquitoes from a grazing marsh environment in southeast England. This site provides extensive wetland habitat for resident and migratory birds and has abundant human nuisance biting mosquitoes. The aim was to identify the blood-feeding patterns of mosquito species present at the site which could contribute to the transmission of pathogens. METHODS Twice-weekly collections of mosquitoes were made from Elmley Nature Reserve, Kent, between June and October 2014. Mosquitoes were collected using resting boxes, by aspiration from man-made structures and using a Mosquito Magnet Pro baited with 1-octen-3-ol. Blood-fed specimens were classified according to the degree of blood meal digestion using the Sella scale and vertebrate origin determined using sequencing of a fragment of the mitochondrial cytochrome C oxidase subunit I gene. Mosquitoes that were morphologically cryptic were identified to species level using multiplex PCR and sequencing methods. RESULTS A total of 20,666 mosquitoes of 11 species were collected, and 2,159 (10.4%) were blood-fed (Sella scale II-VI); of these 1,341 blood-fed specimens were selected for blood meal analysis. Vertebrate origin was successfully identified in 964 specimens (72%). Collections of blood-fed individuals were dominated by Anopheles maculipennis complex (73.5%), Culiseta annulata (21.2%) and Culex pipiens form pipiens (10.4%). Nineteen vertebrate hosts comprising five mammals and 14 birds were identified as hosts for mosquitoes, including two migratory bird species. Feeding on birds by Culex modestus and Anopheles atroparvus populations in England was demonstrated. CONCLUSIONS This study expands the vertebrate host range of mosquitoes in the Thames estuary region of the UK. Feeding on both resident and migratory bird species by potential arbovirus vectors including Cx. pipiens f. pipiens and Cx. modestus indicates the potential for enzootic transmission of an introduced arbovirus between migratory and local bird species by native mosquito species.
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Affiliation(s)
- V A Brugman
- The Pirbright Institute, Ash Road, Woking, Surrey, UK. .,London School of Hygiene and Tropical Medicine, Keppel Street, London, UK.
| | | | - M E England
- The Pirbright Institute, Ash Road, Woking, Surrey, UK
| | - J M Medlock
- Public Health England, Porton Down, Salisbury, UK.,Health Protection Research Unit in Emerging Infections & Zoonoses, Porton Down, Salisbury, UK
| | - P P C Mertens
- The Pirbright Institute, Ash Road, Woking, Surrey, UK.,The University of Nottingham, Sutton Bonington, Leicestershire, UK
| | - J G Logan
- London School of Hygiene and Tropical Medicine, Keppel Street, London, UK
| | - A J Wilson
- The Pirbright Institute, Ash Road, Woking, Surrey, UK
| | - A R Fooks
- Animal and Plant Health Agency, New Haw, Addlestone, Surrey, UK.,Department of Clinical Infection, Microbiology and Immunology, University of Liverpool, Liverpool, UK
| | - N Johnson
- London School of Hygiene and Tropical Medicine, Keppel Street, London, UK.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK
| | - S Carpenter
- The Pirbright Institute, Ash Road, Woking, Surrey, UK
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14
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Maan S, Kumar A, Gupta AK, Dalal A, Chaudhary D, Gupta TK, Bansal N, Kumar V, Batra K, Sindhu N, Kumar A, Mahajan NK, Maan NS, Mertens PPC. Concurrent infection of Bluetongue and Peste-des-petits-ruminants virus in small ruminants in Haryana State of India. Transbound Emerg Dis 2017; 65:235-239. [PMID: 28116836 DOI: 10.1111/tbed.12610] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 10/19/2016] [Indexed: 11/27/2022]
Abstract
Bluetongue (BT) and peste-des-petits-ruminants (PPR) are major transboundary diseases of small ruminant, which are endemic in India. Testing of bluetongue virus (BTV) and peste-des-petits-ruminants virus (PPRV) from recent outbreaks (2015-2016) in different regions of Haryana State of India revealed that 27.5% of the samples showed the presence of dual infection of BTV and PPRV. Analysis of Seg-2 of BTV (the serotype-determining protein) showed the presence of BTV-12w in several isolates. However, analysis of N gene fragment amplicons showed that viruses belong to lineage IV were most closely related to a pathogenic strain of PPRV from Delhi. This is the first report of co-circulation of PPRV lineage IV and bluetongue virus serotype 12 in the state.
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Affiliation(s)
- S Maan
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Aman Kumar
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - A K Gupta
- Department of Veterinary Microbiology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - A Dalal
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India.,Department of Veterinary Microbiology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - D Chaudhary
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - T K Gupta
- Teaching Veterinary Clinical Complex, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - N Bansal
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - V Kumar
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - K Batra
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - N Sindhu
- Teaching Veterinary Clinical Complex, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Ankit Kumar
- TVCC Regional Centre, Uchani (Karnal), College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - N K Mahajan
- Veterinary Public Health & Epidemiology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - N S Maan
- Department of Animal Nutrition and Resource faculty, Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - P P C Mertens
- The Pirbright Institute, Pirbright, Surrey, UK.,School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Leicestershire, UK
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15
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Hemadri D, Maan S, Chanda MM, Rao PP, Putty K, Krishnajyothi Y, Reddy GH, Kumar V, Batra K, Reddy YV, Maan NS, Reddy YN, Singh KP, Shivachandra SB, Hegde NR, Rahman H, Mertens PPC. Dual Infection with Bluetongue Virus Serotypes and First-Time Isolation of Serotype 5 in India. Transbound Emerg Dis 2016; 64:1912-1917. [PMID: 28004522 DOI: 10.1111/tbed.12589] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Indexed: 11/28/2022]
Abstract
Bluetongue is endemic in India and has been reported from most Indian states. Of late, the clinical disease is most frequently seen in the states of Andhra Pradesh, Telangana (erstwhile Andhra Pradesh state), Tamil Nadu and Karnataka. Our analysis of diagnostic samples from bluetongue outbreaks during 2010-2011 from the state of Karnataka identified bluetongue virus (BTV) serotype 5 (BTV-5) for the first time in India. One of the diagnostic samples (CH1) and subsequent virus isolate (IND2010/02) contained both BTV-2 and BTV-5. Segment 2 (seg-2) sequence data (400 bp: nucleotides 2538-2921) for IND2010/02-BTV5, showed 94.3% nucleotide identity to BTV-5 from South Africa (Accession no. AJ585126), confirming the virus serotype and also indicating that Seg-2 was derived from a Western topotype, which is in contrast to serotype 2, that belongs to an Eastern topotype. BTV-5 has been recently reported from Africa, China, French islands and the Americas. Although the exact source of the Indian BTV-5 isolate is still to be confirmed, recent identification of additional exotic serotypes in India is of real concern and might add to the severity of the disease seen in these outbreaks.
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Affiliation(s)
- D Hemadri
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bengaluru, Karnataka, India
| | - S Maan
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - M M Chanda
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bengaluru, Karnataka, India
| | - P P Rao
- Ella Foundation, Genome Valley, Hyderabad, Telangana, India
| | - K Putty
- College of Veterinary Science, P.V. Narsimha Rao Telangana Veterinary University, Hyderabad, Telangana, India
| | - Y Krishnajyothi
- Telangana State Veterinary Biological & Research Institute, Goverment of Telangana, Hyderabad, Telangana, India
| | - G H Reddy
- Telangana State Veterinary Biological & Research Institute, Goverment of Telangana, Hyderabad, Telangana, India
| | - V Kumar
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - K Batra
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Y V Reddy
- Ella Foundation, Genome Valley, Hyderabad, Telangana, India
| | - N S Maan
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Y N Reddy
- College of Veterinary Science, P.V. Narsimha Rao Telangana Veterinary University, Hyderabad, Telangana, India
| | - K P Singh
- Pathology Laboratory, Centre for Animal Disease Research and Diagnosis, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - S B Shivachandra
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bengaluru, Karnataka, India
| | - N R Hegde
- Ella Foundation, Genome Valley, Hyderabad, Telangana, India
| | - H Rahman
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bengaluru, Karnataka, India
| | - P P C Mertens
- The School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Leicestershire, UK
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16
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Rydevik G, Innocent GT, Marion G, Davidson RS, White PCL, Billinis C, Barrow P, Mertens PPC, Gavier-Widén D, Hutchings MR. Using Combined Diagnostic Test Results to Hindcast Trends of Infection from Cross-Sectional Data. PLoS Comput Biol 2016; 12:e1004901. [PMID: 27384712 PMCID: PMC4934910 DOI: 10.1371/journal.pcbi.1004901] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 04/07/2016] [Indexed: 11/19/2022] Open
Abstract
Infectious disease surveillance is key to limiting the consequences from infectious pathogens and maintaining animal and public health. Following the detection of a disease outbreak, a response in proportion to the severity of the outbreak is required. It is thus critical to obtain accurate information concerning the origin of the outbreak and its forward trajectory. However, there is often a lack of situational awareness that may lead to over- or under-reaction. There is a widening range of tests available for detecting pathogens, with typically different temporal characteristics, e.g. in terms of when peak test response occurs relative to time of exposure. We have developed a statistical framework that combines response level data from multiple diagnostic tests and is able to 'hindcast' (infer the historical trend of) an infectious disease epidemic. Assuming diagnostic test data from a cross-sectional sample of individuals infected with a pathogen during an outbreak, we use a Bayesian Markov Chain Monte Carlo (MCMC) approach to estimate time of exposure, and the overall epidemic trend in the population prior to the time of sampling. We evaluate the performance of this statistical framework on simulated data from epidemic trend curves and show that we can recover the parameter values of those trends. We also apply the framework to epidemic trend curves taken from two historical outbreaks: a bluetongue outbreak in cattle, and a whooping cough outbreak in humans. Together, these results show that hindcasting can estimate the time since infection for individuals and provide accurate estimates of epidemic trends, and can be used to distinguish whether an outbreak is increasing or past its peak. We conclude that if temporal characteristics of diagnostics are known, it is possible to recover epidemic trends of both human and animal pathogens from cross-sectional data collected at a single point in time.
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Affiliation(s)
- Gustaf Rydevik
- Biomathematics and Statistics Scotland (BIOSS), Edinburgh, United Kingdom
- SRUC, Edinburgh, United Kingdom
- Environment Department, University of York, York, United Kingdom
| | - Giles T. Innocent
- Biomathematics and Statistics Scotland (BIOSS), Edinburgh, United Kingdom
| | - Glenn Marion
- Biomathematics and Statistics Scotland (BIOSS), Edinburgh, United Kingdom
| | | | | | - Charalambos Billinis
- Laboratory of Microbiology and Parasitology, Faculty of Veterinary Medicine, University of Thessaly, Karditsa, Greece
- Department of Biomedicine, Institute for Research and Technology of Thessaly, Larissa, Greece
| | - Paul Barrow
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom
| | - Peter P. C. Mertens
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Surrey, United Kingdom
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17
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Forzan M, Maan S, Mazzei M, Belaganahalli MN, Bonuccelli L, Calamari M, Carrozza ML, Cappello V, Di Luca M, Bandecchi P, Mertens PPC, Tolari F. Generation of virus like particles for epizootic hemorrhagic disease virus. Res Vet Sci 2016; 107:116-122. [PMID: 27473984 DOI: 10.1016/j.rvsc.2016.05.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 10/09/2015] [Revised: 05/17/2016] [Accepted: 05/30/2016] [Indexed: 12/25/2022]
Abstract
Epizootic hemorrhagic disease virus (EHDV) is a distinct species within the genus Orbivirus, within the family Reoviridae. The epizootic hemorrhagic disease virus genome comprises ten segments of linear, double stranded (ds) RNA, which are packaged within each virus particle. The EHDV virion has a three layered capsid-structure, generated by four major viral proteins: VP2 and VP5 (outer capsid layer); VP7 (intermediate, core-surface layer) and VP3 (innermost, sub-core layer). Although EHDV infects cattle sporadically, several outbreaks have recently occurred in this species in five Mediterranean countries, indicating a potential threat to the European cattle industry. EHDV is transmitted by biting midges of the genus Culicoides, which can travel long distances through wind-born movements (particularly over water), increasing the potential for viral spread in new areas/countries. Expression systems to generate self-assembled virus like particles (VLPs) by simultaneous expression of the major capsid-proteins, have been established for several viruses (including bluetongue virus). This study has developed expression systems for production of EHDV VLPs, for use as non-infectious antigens in both vaccinology and serology studies, avoiding the risk of genetic reassortment between vaccine and field strains and facilitating large scale antigen production. Genes encoding the four major-capsid proteins of a field strain of EHDV-6, were isolated and cloned into transfer vectors, to generate two recombinant baculoviruses. The expression of these viral genes was assessed in insect cells by monitoring the presence of specific viral mRNAs and by western blotting. Electron microscopy studies confirmed the formation and purification of assembled VLPs.
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Affiliation(s)
- Mario Forzan
- Dipartimento di Scienze Veterinarie, Università di Pisa, Italy
| | | | - Maurizio Mazzei
- Dipartimento di Scienze Veterinarie, Università di Pisa, Italy
| | | | | | | | | | - Valentina Cappello
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation, NEST, Pisa, Italy
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18
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Maan S, Maan NS, Batra K, Kumar A, Gupta A, Rao PP, Hemadri D, Reddy YN, Guimera M, Belaganahalli MN, Mertens PPC. Reverse transcription loop-mediated isothermal amplification assays for rapid identification of eastern and western strains of bluetongue virus in India. J Virol Methods 2016; 234:65-74. [PMID: 27054888 DOI: 10.1016/j.jviromet.2016.04.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 03/18/2016] [Accepted: 04/01/2016] [Indexed: 12/30/2022]
Abstract
Bluetongue virus (BTV) infects all ruminants, including cattle, goats and camelids, causing bluetongue disease (BT) that is often severe in naïve deer and sheep. Reverse-transcription-loop-mediated-isothermal-amplification (RT-LAMP) assays were developed to detect eastern or western topotype of BTV strains circulating in India. Each assay uses four primers recognizing six distinct sequences of BTV genome-segment 1 (Seg-1). The eastern (e)RT-LAMP and western (w)RT-LAMP assay detected BTV RNA in all positive isolates that were tested (n=52, including Indian BTV-1, -2, -3, -5, -9, -10, -16, -21 -23, and -24 strains) with high specificity and efficiency. The analytical sensitivity of the RT-LAMP assays is comparable to real-time RT-PCR, but higher than conventional RT-PCR. The accelerated eRT-LAMP and wRT-LAMP assays generated detectable levels of amplified DNA, down to 0.216 fg of BTV RNA template or 108 fg of BTV RNA template within 60-90min respectively. The assays gave negative results with RNA from foot-and-mouth-disease virus (FMDV), peste des petits ruminants virus (PPRV), or DNA from Capripox viruses and Orf virus (n=10), all of which can cause clinical signs similar to BT. Both RT-LAMP assays did not show any cross-reaction among themselves. The assays are rapid, easy to perform, could be adapted as a 'penside' test making them suitable for 'front-line' diagnosis, helping to identify and contain field outbreaks of BTV.
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Affiliation(s)
- S Maan
- Department of Animal Biotechnology, College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India.
| | - N S Maan
- Department of Animal Biotechnology, College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India; Resource Faculty, Department of Animal Biotechnology, College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - K Batra
- Department of Animal Biotechnology, College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - A Kumar
- Department of Animal Biotechnology, College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - A Gupta
- Department of Animal Biotechnology, College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | | | - Divakar Hemadri
- National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Hebbal, Bengaluru 560024 K.A, India
| | - Yella Narasimha Reddy
- College of Veterinary Science, Acharya N.G. Ranga Agricultural University, Rajendra Nagar, Hyderabad 500 030, T.S, India
| | - M Guimera
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking GU24 0NF Surrey, United Kingdom
| | - M N Belaganahalli
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking GU24 0NF Surrey, United Kingdom
| | - P P C Mertens
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking GU24 0NF Surrey, United Kingdom
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Maan NS, Maan S, Potgieter AC, Wright IM, Belaganahalli M, Mertens PPC. Development of Real-Time RT-PCR Assays for Detection and Typing of Epizootic Haemorrhagic Disease Virus. Transbound Emerg Dis 2016; 64:1120-1132. [PMID: 26888716 PMCID: PMC5516135 DOI: 10.1111/tbed.12477] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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] [Received: 12/03/2015] [Indexed: 12/23/2022]
Abstract
Epizootic haemorrhagic disease virus (EHDV) is an emerging arboviral pathogen of wild and domestic ruminants worldwide. It is closely related to bluetongue virus (BTV) and is transmitted by adult females of competent Culicoides vector species. The EHDV genome consists of ten linear double‐stranded (ds)RNA segments, encoding five non‐structural and seven structural proteins. Genome‐segment reassortment contributes to a high level of genetic variation in individual virus strains, particularly in the areas where multiple and distinct virus lineages co‐circulate. In spite of the relatively close relationship between BTV and EHDV herd‐immunity to BTV does not appear to protect against the introduction and infection of animals by EHDV. Although EHDV can cause up to 80% morbidity in affected animals, vaccination with the homologous EHDV serotype is protective. Outer‐capsid protein VP2, encoded by Seg‐2, is the most variable of the EHDV proteins and determines both the specificity of reactions with neutralizing antibodies and consequently the identity of the eight EHDV serotypes. In contrast, VP6 (the viral helicase), encoded by Seg‐9, is highly conserved, representing a virus species/serogroup‐specific antigen. We report the development and evaluation of quantitative (q)RT‐PCR assays targeting EHDV Seg‐9 that can detect all EHDV strains (regardless of geographic origin/topotype/serotype), as well as type‐specific assays targeting Seg‐2 of the eight EHDV serotypes. The assays were evaluated using orbivirus isolates from the ‘Orbivirus reference collection’ (ORC) at The Pirbright Institute and were shown to be EHDV pan‐reactive or type‐specific. They can be used for rapid, sensitive and reliable detection and identification (typing) of EHDV RNA from infected blood, tissue samples, homogenized Culicoides, or tissue culture supernatant. None of the assays detected RNA from closely related but heterologous orbiviruses, or from uninfected host animals or cell cultures. The techniques presented could be used for both surveillance and vaccine matching (serotype identification) as part of control strategies for incursions in wild and domestic animal species.
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Affiliation(s)
- N S Maan
- The Pirbright Institute, Woking, Surrey, UK
| | - S Maan
- The Pirbright Institute, Woking, Surrey, UK
| | - A C Potgieter
- Deltamune Pty Ltd, Lyttelton, Centurion, South Africa.,Department of Biochemistry, Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - I M Wright
- Deltamune Pty Ltd, Lyttelton, Centurion, South Africa.,Department of Biochemistry, Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa
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20
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Maan S, Maan NS, Belaganahalli MN, Rao PP, Singh KP, Hemadri D, Putty K, Kumar A, Batra K, Krishnajyothi Y, Chandel BS, Reddy GH, Nomikou K, Reddy YN, Attoui H, Hegde NR, Mertens PPC. Full-Genome Sequencing as a Basis for Molecular Epidemiology Studies of Bluetongue Virus in India. PLoS One 2015; 10:e0131257. [PMID: 26121128 PMCID: PMC4488075 DOI: 10.1371/journal.pone.0131257] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 05/29/2015] [Indexed: 01/04/2023] Open
Abstract
Since 1998 there have been significant changes in the global distribution of bluetongue virus (BTV). Ten previously exotic BTV serotypes have been detected in Europe, causing severe disease outbreaks in naïve ruminant populations. Previously exotic BTV serotypes were also identified in the USA, Israel, Australia and India. BTV is transmitted by biting midges (Culicoides spp.) and changes in the distribution of vector species, climate change, increased international travel and trade are thought to have contributed to these events. Thirteen BTV serotypes have been isolated in India since first reports of the disease in the country during 1964. Efficient methods for preparation of viral dsRNA and cDNA synthesis, have facilitated full-genome sequencing of BTV strains from the region. These studies introduce a new approach for BTV characterization, based on full-genome sequencing and phylogenetic analyses, facilitating the identification of BTV serotype, topotype and reassortant strains. Phylogenetic analyses show that most of the equivalent genome-segments of Indian BTV strains are closely related, clustering within a major eastern BTV 'topotype'. However, genome-segment 5 (Seg-5) encoding NS1, from multiple post 1982 Indian isolates, originated from a western BTV topotype. All ten genome-segments of BTV-2 isolates (IND2003/01, IND2003/02 and IND2003/03) are closely related (>99% identity) to a South African BTV-2 vaccine-strain (western topotype). Similarly BTV-10 isolates (IND2003/06; IND2005/04) show >99% identity in all genome segments, to the prototype BTV-10 (CA-8) strain from the USA. These data suggest repeated introductions of western BTV field and/or vaccine-strains into India, potentially linked to animal or vector-insect movements, or unauthorised use of 'live' South African or American BTV-vaccines in the country. The data presented will help improve nucleic acid based diagnostics for Indian serotypes/topotypes, as part of control strategies.
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Affiliation(s)
- Sushila Maan
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, 125 004, Haryana, India
- * E-mail: (SM); (PPCM)
| | - Narender S. Maan
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, 125 004, Haryana, India
| | - Manjunatha N. Belaganahalli
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | | | - Karam Pal Singh
- Pathology Laboratory, Centre for Animal Disease Research and Diagnosis, Indian Veterinary Research Institute, Izatnagar, 243122, U.P, India
| | - Divakar Hemadri
- National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Hebbal, Bengaluru, 560024, K.A, India
| | - Kalyani Putty
- College of Veterinary Science, Acharya N.G. Ranga Agricultural University, Rajendra Nagar, Hyderabad, 500 030, T.S, India
| | - Aman Kumar
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, 125 004, Haryana, India
| | - Kanisht Batra
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, 125 004, Haryana, India
| | - Yadlapati Krishnajyothi
- Veterinary Biological & Research Institute, Govt. of Andhra Pradesh, Hyderabad, 500028, T.S, India
| | - Bharat S. Chandel
- College of Veterinary Science and AH, S.D. Agricultural University, Sardarkrushinagar-385 506, B.K., Gujarat, India
| | - G. Hanmanth Reddy
- Veterinary Biological & Research Institute, Govt. of Andhra Pradesh, Hyderabad, 500028, T.S, India
| | - Kyriaki Nomikou
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | - Yella Narasimha Reddy
- College of Veterinary Science, Acharya N.G. Ranga Agricultural University, Rajendra Nagar, Hyderabad, 500 030, T.S, India
| | - Houssam Attoui
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
| | | | - Peter P. C. Mertens
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking, Surrey, GU24 0NF, United Kingdom
- * E-mail: (SM); (PPCM)
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21
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Belaganahalli MN, Maan S, Maan NS, Pritchard I, Kirkland PD, Brownlie J, Attoui H, Mertens PPC. Full genome characterization of the culicoides-borne marsupial orbiviruses: Wallal virus, Mudjinbarry virus and Warrego viruses. PLoS One 2014; 9:e108379. [PMID: 25299687 PMCID: PMC4191977 DOI: 10.1371/journal.pone.0108379] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 08/19/2014] [Indexed: 01/24/2023] Open
Abstract
Viruses belonging to the species Wallal virus and Warrego virus of the genus Orbivirus were identified as causative agents of blindness in marsupials in Australia during 1994/5. Recent comparisons of nucleotide (nt) and amino acid (aa) sequences have provided a basis for the grouping and classification of orbivirus isolates. However, full-genome sequence data are not available for representatives of all Orbivirus species. We report full-genome sequence data for three additional orbiviruses: Wallal virus (WALV); Mudjinabarry virus (MUDV) and Warrego virus (WARV). Comparisons of conserved polymerase (Pol), sub-core-shell 'T2' and core-surface 'T13' proteins show that these viruses group with other Culicoides borne orbiviruses, clustering with Eubenangee virus (EUBV), another orbivirus infecting marsupials. WARV shares <70% aa identity in all three conserved proteins (Pol, T2 and T13) with other orbiviruses, consistent with its classification within a distinct Orbivirus species. Although WALV and MUDV share <72.86%/67.93% aa/nt identity with other orbiviruses in Pol, T2 and T13, they share >99%/90% aa/nt identities with each other (consistent with membership of the same virus species - Wallal virus). However, WALV and MUDV share <68% aa identity in their larger outer capsid protein VP2(OC1), consistent with membership of different serotypes within the species - WALV-1 and WALV-2 respectively.
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Affiliation(s)
- Manjunatha N. Belaganahalli
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Sushila Maan
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Narender S. Maan
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Ian Pritchard
- Australian Animal Health Laboratory, CSIRO, Geelong, Victoria, Australia
| | - Peter D. Kirkland
- Elizabeth Macarthur Agricultural Institute, Camden, New South Wales, Australia
| | - Joe Brownlie
- Department of Pathology and Infectious Diseases, Royal Veterinary College, North Mymms, Hatfield, Herts, United Kingdom
| | - Houssam Attoui
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Peter P. C. Mertens
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
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22
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Tuppurainen ESM, Pearson CR, Bachanek-Bankowska K, Knowles NJ, Amareen S, Frost L, Henstock MR, Lamien CE, Diallo A, Mertens PPC. Characterization of sheep pox virus vaccine for cattle against lumpy skin disease virus. Antiviral Res 2014; 109:1-6. [PMID: 24973760 PMCID: PMC4149609 DOI: 10.1016/j.antiviral.2014.06.009] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 06/11/2014] [Accepted: 06/16/2014] [Indexed: 11/28/2022]
Abstract
Lumpy skin disease is of significant economic impact for the cattle industry in Africa. The disease is currently spreading aggressively in the Near East, posing a threat of incursion to Europe and Asia. Due to cross-protection within the Capripoxvirus genus, sheep pox virus (SPPV) vaccines have been widely used for cattle against lumpy skin disease virus (LSDV). In the Middle East and the Horn of Africa these vaccines have been associated with incomplete protection and adverse reactions in cattle post-vaccination. The present study confirms that the real identity of the commonly used Kenyan sheep and goat pox vaccine virus (KSGP) O-240 is not SPPV but is actually LSDV. The low level attenuation of this virus is likely to be not sufficient for safe use in cattle, causing clinical disease in vaccinated animals. In addition, Isiolo and Kedong goat pox strains, capable of infecting sheep, goats and cattle are identified for potential use as broad-spectrum vaccine candidates against all capripox diseases.
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Affiliation(s)
| | | | | | - Nick J Knowles
- The Pirbright Institute, Ash Road, Pirbright, Surrey GU24 0NF, UK
| | - Shadi Amareen
- Jordan Bio-Industries Centre (JOVAC), PO Box 43, Amman 11941, Jordan
| | - Lorraine Frost
- The Pirbright Institute, Ash Road, Pirbright, Surrey GU24 0NF, UK
| | - Mark R Henstock
- The Pirbright Institute, Ash Road, Pirbright, Surrey GU24 0NF, UK
| | - Charles E Lamien
- Animal Production and Health Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Wagramer Strasse 5, P.O. Box 100, A-1400 Vienna, Austria
| | - Adama Diallo
- Animal Production and Health Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Wagramer Strasse 5, P.O. Box 100, A-1400 Vienna, Austria
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23
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Mohd Jaafar F, Belhouchet M, Vitour D, Adam M, Breard E, Zientara S, Mertens PPC, Attoui H. Immunisation with bacterial expressed VP2 and VP5 of bluetongue virus (BTV) protect α/β interferon-receptor knock-out (IFNAR(-/-)) mice from homologous lethal challenge. Vaccine 2014; 32:4059-67. [PMID: 24886956 DOI: 10.1016/j.vaccine.2014.05.056] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 01/31/2014] [Revised: 04/22/2014] [Accepted: 05/15/2014] [Indexed: 12/23/2022]
Abstract
BTV-4 structural proteins VP2 (as two domains: VP2D1 and VP2D2), VP5 (lacking the first 100 amino acids: VP5Δ1-100) and full-length VP7, expressed in bacteria as soluble glutathione S-transferase (GST) fusion-proteins, were used to immunise Balb/c and α/β interferon receptor knock-out (IFNAR(-/-)) mice. Neutralising antibody (NAbs) titres (expressed as log10 of the reciprocal of the last dilution of mouse serum which reduced plaque number by ≥50%) induced by the VP2 domains ranged from 1.806 to 2.408 in Balb/c and IFNAR(-/-) mice. The immunised IFNAR(-/-) mice challenged with a homologous live BTV-4 survived and failed to develop signs of infection (ocular discharge and apathy). Although subsequent attempts to isolate virus were unsuccessful (possibly reflecting presence of neutralising antibodies), a transient/low level viraemia was detected by real time RT-PCR. In contrast, mice immunised with the two VP2 domains with or without VP5Δ1-100 and VP7, then challenged with the heterologous serotype, BTV-8, all died by day 7 post-infection. We conclude that immunisation with bacterially-expressed VP2 domains can induce strong serotype-specific NAb responses. Bacterial expression could represent a cost effective and risk-free alternative to the use of live or inactivated vaccines, particularly if viruses prove to be difficult to propagate in cell culture (like BTV-25). A vaccine based on bacterially expressed VP2 and VP5 of BTV is also DIVA-compatible.
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Affiliation(s)
- Fauziah Mohd Jaafar
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey GU240NF, United Kingdom
| | - Mourad Belhouchet
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey GU240NF, United Kingdom
| | - Damien Vitour
- Anses, INRA, ENVA-UPEC, UMR 1161 Virology Unit, French Agency for Food, Environmental and Occupational Health and Safety, Maisons-Alfort, 94703 France
| | - Micheline Adam
- Anses, INRA, ENVA-UPEC, UMR 1161 Virology Unit, French Agency for Food, Environmental and Occupational Health and Safety, Maisons-Alfort, 94703 France
| | - Emmanuel Breard
- Anses, INRA, ENVA-UPEC, UMR 1161 Virology Unit, French Agency for Food, Environmental and Occupational Health and Safety, Maisons-Alfort, 94703 France
| | - Stéphan Zientara
- Anses, INRA, ENVA-UPEC, UMR 1161 Virology Unit, French Agency for Food, Environmental and Occupational Health and Safety, Maisons-Alfort, 94703 France
| | - Peter P C Mertens
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey GU240NF, United Kingdom
| | - Houssam Attoui
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey GU240NF, United Kingdom.
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Bachanek-Bankowska K, Maan S, Castillo-Olivares J, Manning NM, Maan NS, Potgieter AC, Di Nardo A, Sutton G, Batten C, Mertens PPC. Real time RT-PCR assays for detection and typing of African horse sickness virus. PLoS One 2014; 9:e93758. [PMID: 24721971 PMCID: PMC3983086 DOI: 10.1371/journal.pone.0093758] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Accepted: 03/05/2014] [Indexed: 12/25/2022] Open
Abstract
Although African horse sickness (AHS) can cause up to 95% mortality in horses, naïve animals can be protected by vaccination against the homologous AHSV serotype. Genome segment 2 (Seg-2) encodes outer capsid protein VP2, the most variable of the AHSV proteins. VP2 is also a primary target for AHSV specific neutralising antibodies, and consequently determines the identity of the nine AHSV serotypes. In contrast VP1 (the viral polymerase) and VP3 (the sub-core shell protein), encoded by Seg-1 and Seg-3 respectively, are highly conserved, representing virus species/orbivirus-serogroup-specific antigens. We report development and evaluation of real-time RT-PCR assays targeting AHSV Seg-1 or Seg-3, that can detect any AHSV type (virus species/serogroup-specific assays), as well as type-specific assays targeting Seg-2 of the nine AHSV serotypes. These assays were evaluated using isolates of different AHSV serotypes and other closely related orbiviruses, from the ‘Orbivirus Reference Collection’ (ORC) at The Pirbright Institute. The assays were shown to be AHSV virus-species-specific, or type-specific (as designed) and can be used for rapid, sensitive and reliable detection and identification (typing) of AHSV RNA in infected blood, tissue samples, homogenised Culicoides, or tissue culture supernatant. None of the assays amplified cDNAs from closely related heterologous orbiviruses, or from uninfected host animals or cell cultures.
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Affiliation(s)
| | - Sushila Maan
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
| | - Javier Castillo-Olivares
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
| | - Nicola M. Manning
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
| | - Narender Singh Maan
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
| | - Abraham C. Potgieter
- Deltamune (Pty) Ltd, Lyttelton, Centurion, South Africa
- Department of Biochemistry, Centre for Human Metabonomics, North-West University, Private Bag X6001, Potchefstroom, South Africa
| | - Antonello Di Nardo
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
| | - Geoff Sutton
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Carrie Batten
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
| | - Peter P. C. Mertens
- Vector-borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, United Kingdom
- * E-mail:
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25
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Mohd Jaafar F, Belhouchet M, Belaganahalli M, Tesh RB, Mertens PPC, Attoui H. Full-genome characterisation of Orungo, Lebombo and Changuinola viruses provides evidence for co-evolution of orbiviruses with their arthropod vectors. PLoS One 2014; 9:e86392. [PMID: 24475112 PMCID: PMC3901712 DOI: 10.1371/journal.pone.0086392] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 12/07/2013] [Indexed: 01/06/2023] Open
Abstract
The complete genomes of Orungo virus (ORUV), Lebombo virus (LEBV) and Changuinola virus (CGLV) were sequenced, confirming that they each encode 11 distinct proteins (VP1-VP7 and NS1-NS4). Phylogenetic analyses of cell-attachment protein 'outer-capsid protein 1' (OC1), show that orbiviruses fall into three large groups, identified as: VP2(OC1), in which OC1 is the 2nd largest protein, including the Culicoides transmitted orbiviruses; VP3(OC1), which includes the mosquito transmitted orbiviruses; and VP4(OC1) which includes the tick transmitted viruses. Differences in the size of OC1 between these groups, places the T2 'subcore-shell protein' as the third largest protein 'VP3(T2)' in the first of these groups, but the second largest protein 'VP3(T2)' in the other two groups. ORUV, LEBV and CGLV all group with the Culicoides-borne VP2(OC1)/VP3(T2) viruses. The G+C content of the ORUV, LEBV and CGLV genomes is also similar to that of the Culicoides-borne, rather than the mosquito-borne, or tick borne orbiviruses. These data suggest that ORUV and LEBV are Culicoides- rather than mosquito-borne. Multiple isolations of CGLV from sand flies suggest that they are its primary vector. OC1 of the insect-borne orbiviruses is approximately twice the size of the equivalent protein of the tick borne viruses. Together with internal sequence similarities, this suggests its origin by duplication (concatermerisation) of a smaller OC1 from an ancestral tick-borne orbivirus. Phylogenetic comparisons showing linear relationships between the dates of evolutionary-separation of their vector species, and genetic-distances between tick-, mosquito- or Culicoides-borne virus-groups, provide evidence for co-evolution of the orbiviruses with their arthropod vectors.
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Affiliation(s)
- Fauziah Mohd Jaafar
- Department of Vector-Borne Viral Diseases, The Pirbright Institute, Pirbright, United Kingdom
| | - Mourad Belhouchet
- Department of Vector-Borne Viral Diseases, The Pirbright Institute, Pirbright, United Kingdom
| | | | - Robert B. Tesh
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Peter P. C. Mertens
- Department of Vector-Borne Viral Diseases, The Pirbright Institute, Pirbright, United Kingdom
| | - Houssam Attoui
- Department of Vector-Borne Viral Diseases, The Pirbright Institute, Pirbright, United Kingdom
- * E-mail:
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Shaw AE, Brüning-Richardson A, Morrison EE, Bond J, Simpson J, Ross-Smith N, Alpar O, Mertens PPC, Monaghan P. Bluetongue virus infection induces aberrant mitosis in mammalian cells. Virol J 2013; 10:319. [PMID: 24165208 PMCID: PMC3874736 DOI: 10.1186/1743-422x-10-319] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 09/27/2013] [Indexed: 12/25/2022] Open
Abstract
Background Bluetongue virus (BTV) is an arbovirus that is responsible for ‘bluetongue’, an economically important disease of livestock. Although BTV is well characterised at the protein level, less is known regarding its interaction with host cells. During studies of virus inclusion body formation we observed what appeared to be a large proportion of cells in mitosis. Although the modulation of the cell cycle is well established for many viruses, this was a novel observation for BTV. We therefore undertook a study to reveal in more depth the impact of BTV upon cell division. Methods We used a confocal microscopy approach to investigate the localisation of BTV proteins in a cellular context with their respective position relative to cellular proteins. In addition, to quantitatively assess the frequency of aberrant mitosis induction by the viral non-structural protein (NS) 2 we utilised live cell imaging to monitor HeLa-mCherry tubulin cells transfected with a plasmid expressing NS2. Results Our data showed that these ‘aberrant mitoses’ can be induced in multiple cell types and by different strains of BTV. Further study confirmed multiplication of the centrosomes, each resulting in a separate mitotic spindle during mitosis. Interestingly, the BTV NS1 protein was strongly localised to the centrosomal regions. In a separate, yet related observation, the BTV NS2 protein was co-localised with the condensed chromosomes to a region suggestive of the kinetochore. Live cell imaging revealed that expression of an EGFP-NS2 fusion protein in HeLa-mCherry tubulin cells also results in mitotic defects. Conclusions We hypothesise that NS2 is a microtubule cargo protein that may inadvertently disrupt the interaction of microtubule tips with the kinetochores during mitosis. Furthermore, the BTV NS1 protein was distinctly localised to a region encompassing the centrosome and may therefore be, at least in part, responsible for the disruption of the centrosome as observed in BTV infected mammalian cells.
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27
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Belaganahalli MN, Maan S, Maan NS, Nomikou K, Guimera M, Brownlie J, Tesh R, Attoui H, Mertens PPC. Full genome sequencing of Corriparta virus, identifies California mosquito pool virus as a member of the Corriparta virus species. PLoS One 2013; 8:e70779. [PMID: 24015178 PMCID: PMC3754974 DOI: 10.1371/journal.pone.0070779] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 06/21/2013] [Indexed: 11/19/2022] Open
Abstract
The species Corriparta virus (CORV), within the genus Orbivirus, family Reoviridae, currently contains six virus strains: corriparta virus MRM1 (CORV-MRM1); CS0109; V654; V370; Acado virus and Jacareacanga virus. However, lack of neutralization assays, or reference genome sequence data has prevented further analysis of their intra-serogroup/species relationships and identification of individual serotypes. We report whole-genome sequence data for CORV-MRM1, which was isolated in 1960 in Australia. Comparisons of the conserved, polymerase (VP1), sub-core-shell 'T2' and core-surface 'T13' proteins encoded by genome segments 1, 2 and 8 (Seg-1, Seg-2 and Seg-8) respectively, show that this virus groups with the other mosquito borne orbiviruses. However, highest levels of nt/aa sequence identity (75.9%/91.6% in Seg-2/T2: 77.6%/91.7% in Seg-8/T13, respectively) were detected between CORV-MRM1 and California mosquito pool virus (CMPV), an orbivirus isolated in the USA in 1974, showing that they belong to the same virus species. The data presented here identify CMPV as a member of the Corriparta virus species and will facilitate identification of additional CORV isolates, diagnostic assay design and epidemiological studies.
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Affiliation(s)
- Manjunatha N. Belaganahalli
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
| | - Sushila Maan
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Narender S. Maan
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Kyriaki Nomikou
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
| | - Marc Guimera
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
| | - Joe Brownlie
- Department of Pathology and Infectious Diseases, Royal Veterinary College, North Mymms, Hatfield, Herts, United Kingdom
| | - Robert Tesh
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Houssam Attoui
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
| | - Peter P. C. Mertens
- The Vector-Borne Viral Diseases Programme, The Pirbright Institute, Pirbright, Woking, Surrey, United Kingdom
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Aklilu N, Batten C, Gelaye E, Jenberie S, Ayelet G, Wilson A, Belay A, Asfaw Y, Oura C, Maan S, Bachanek-Bankowska K, Mertens PPC. African horse sickness outbreaks caused by multiple virus types in Ethiopia. Transbound Emerg Dis 2012; 61:185-92. [PMID: 23083078 DOI: 10.1111/tbed.12024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [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: 08/21/2012] [Indexed: 12/01/2022]
Abstract
African horse sickness (AHS) is associated with high morbidity and mortality in equids, especially horses. A retrospective analysis was carried out concerning 737 AHS outbreaks that occurred during 2007-2010 in Ethiopia. A total of ten outbreaks were investigated in the study period. All four forms of the disease (pulmonary, cardiac, horse sickness fever and the combined form) were observed, with the cardiac form being the most prevalent. Multiple African horse sickness virus serotypes (AHSV-2, AHSV-4, AHSV-6, AHSV-8 and AHSV-9) were detected by molecular methods (type-specific real-time RT-PCR assays), and fourteen isolates were derived from blood and tissue samples collected during 2009-2010. This is the first report of AHSV-4, AHSV-6 or AHSV-8 in Ethiopia.
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Affiliation(s)
- N Aklilu
- Society for the Protection of Animals Abroad (SPANA) Ethiopia Project, College of Veterinary Medicine and Agriculture, Addis Ababa University, Debre Zeit, Ethiopia
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Lv X, Mohd Jaafar F, Sun X, Belhouchet M, Fu S, Zhang S, Tong SX, Lv Z, Mertens PPC, Liang G, Attoui H. Isolates of Liao ning virus from wild-caught mosquitoes in the Xinjiang province of China in 2005. PLoS One 2012; 7:e37732. [PMID: 22649554 PMCID: PMC3359322 DOI: 10.1371/journal.pone.0037732] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 04/23/2012] [Indexed: 12/02/2022] Open
Abstract
Liao ning virus (LNV) is related to Banna virus, a known human-pathogen present in south-east Asia. Both viruses belong to the genus Seadornavirus, family Reoviridae. LNV causes lethal haemorrhage in experimentally infected mice. Twenty seven isolates of LNV were made from mosquitoes collected in different locations within the Xinjiang province of north-western China during 2005. These mosquitoes were caught in the accommodation of human patients with febrile manifestations, or in animal barns where sheep represent the main livestock species. The regions where LNV was isolated are affected by seasonal encephalitis, but are free of Japanese encephalitis (JE). Genome segment 10 (Seg-10) (encoding cell-attachment and serotype-determining protein VP10) and Seg-12 (encoding non-structural protein VP12) were sequenced for multiple LNV isolates. Phylogenetic analyses showed a less homogenous Seg-10 gene pool, as compared to segment 12. However, all of these isolates appear to belong to LNV type-1. These data suggest a relatively recent introduction of LNV into Xinjiang province, with substitution rates for LNV Seg-10 and Seg-12, respectively, of 2.29×10−4 and 1.57×10−4 substitutions/nt/year. These substitution rates are similar to those estimated for other dsRNA viruses. Our data indicate that the history of LNV is characterized by a lack of demographic fluctuations. However, a decline in the LNV population in the late 1980s - early 1990s, was indicated by data for both Seg-10 and Seg-12. Data also suggest a beginning of an expansion in the late 1990s as inferred from Seg-12 skyline plot.
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Affiliation(s)
- Xinjun Lv
- State Key Laboratory for Infectious Disease Prevention and Control, Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Fauziah Mohd Jaafar
- Department of Vector-borne Viral Diseases, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Xiaohong Sun
- State Key Laboratory for Infectious Disease Prevention and Control, Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Mourad Belhouchet
- Department of Vector-borne Viral Diseases, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Shihong Fu
- State Key Laboratory for Infectious Disease Prevention and Control, Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Song Zhang
- Xinjiang Center for Disease Control and Prevention, Xinjiang, People's Republic of China
| | - Su-xiang Tong
- Xinjiang Center for Disease Control and Prevention, Xinjiang, People's Republic of China
| | - Zhi Lv
- State Key Laboratory for Infectious Disease Prevention and Control, Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Peter P. C. Mertens
- Department of Vector-borne Viral Diseases, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
| | - Guodong Liang
- State Key Laboratory for Infectious Disease Prevention and Control, Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Houssam Attoui
- Department of Vector-borne Viral Diseases, Institute for Animal Health, Pirbright, Woking, Surrey, United Kingdom
- * E-mail:
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Belaganahalli MN, Maan S, Maan NS, Nomikou K, Pritchard I, Lunt R, Kirkland PD, Attoui H, Brownlie J, Mertens PPC. Full genome sequencing and genetic characterization of Eubenangee viruses identify Pata virus as a distinct species within the genus Orbivirus. PLoS One 2012; 7:e31911. [PMID: 22438872 PMCID: PMC3305294 DOI: 10.1371/journal.pone.0031911] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 01/16/2012] [Indexed: 12/31/2022] Open
Abstract
Eubenangee virus has previously been identified as the cause of Tammar sudden death syndrome (TSDS). Eubenangee virus (EUBV), Tilligery virus (TILV), Pata virus (PATAV) and Ngoupe virus (NGOV) are currently all classified within the Eubenangee virus species of the genus Orbivirus, family Reoviridae. Full genome sequencing confirmed that EUBV and TILV (both of which are from Australia) show high levels of aa sequence identity (>92%) in the conserved polymerase VP1(Pol), sub-core VP3(T2) and outer core VP7(T13) proteins, and are therefore appropriately classified within the same virus species. However, they show much lower amino acid (aa) identity levels in their larger outer-capsid protein VP2 (<53%), consistent with membership of two different serotypes - EUBV-1 and EUBV-2 (respectively). In contrast PATAV showed significantly lower levels of aa sequence identity with either EUBV or TILV (with <71% in VP1(Pol) and VP3(T2), and <57% aa identity in VP7(T13)) consistent with membership of a distinct virus species. A proposal has therefore been sent to the Reoviridae Study Group of ICTV to recognise 'Pata virus' as a new Orbivirus species, with the PATAV isolate as serotype 1 (PATAV-1). Amongst the other orbiviruses, PATAV shows closest relationships to Epizootic Haemorrhagic Disease virus (EHDV), with 80.7%, 72.4% and 66.9% aa identity in VP3(T2), VP1(Pol), and VP7(T13) respectively. Although Ngoupe virus was not available for these studies, like PATAV it was isolated in Central Africa, and therefore seems likely to also belong to the new species, possibly as a distinct 'type'. The data presented will facilitate diagnostic assay design and the identification of additional isolates of these viruses.
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Affiliation(s)
| | - Sushila Maan
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Narender S. Maan
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Kyriaki Nomikou
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Ian Pritchard
- Australian Animal Health Laboratory, CSIRO, Geelong, Victoria, Australia
| | - Ross Lunt
- Australian Animal Health Laboratory, CSIRO, Geelong, Victoria, Australia
| | - Peter D. Kirkland
- Elizabeth Macarthur Agricultural Institute, Camden, New South Wales, Australia
| | - Houssam Attoui
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Joe Brownlie
- Department of Pathology and Infectious Diseases, Royal Veterinary College, North Mymms, Hatfield, Herts, United Kingdom
| | - Peter P. C. Mertens
- Vector-borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
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Maan NS, Maan S, Belaganahalli MN, Ostlund EN, Johnson DJ, Nomikou K, Mertens PPC. Identification and differentiation of the twenty six bluetongue virus serotypes by RT-PCR amplification of the serotype-specific genome segment 2. PLoS One 2012; 7:e32601. [PMID: 22389711 PMCID: PMC3289656 DOI: 10.1371/journal.pone.0032601] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 01/27/2012] [Indexed: 01/07/2023] Open
Abstract
Bluetongue (BT) is an arthropod-borne viral disease, which primarily affects ruminants in tropical and temperate regions of the world. Twenty six bluetongue virus (BTV) serotypes have been recognised worldwide, including nine from Europe and fifteen in the United States. Identification of BTV serotype is important for vaccination programmes and for BTV epidemiology studies. Traditional typing methods (virus isolation and serum or virus neutralisation tests (SNT or VNT)) are slow (taking weeks, depend on availability of reference virus-strains or antisera) and can be inconclusive. Nucleotide sequence analyses and phylogenetic comparisons of genome segment 2 (Seg-2) encoding BTV outer-capsid protein VP2 (the primary determinant of virus serotype) were completed for reference strains of BTV-1 to 26, as well as multiple additional isolates from different geographic and temporal origins. The resulting Seg-2 database has been used to develop rapid (within 24 h) and reliable RT-PCR-based typing assays for each BTV type. Multiple primer-pairs (at least three designed for each serotype) were widely tested, providing an initial identification of serotype by amplification of a cDNA product of the expected size. Serotype was confirmed by sequencing of the cDNA amplicons and phylogenetic comparisons to previously characterised reference strains. The results from RT-PCR and sequencing were in perfect agreement with VNT for reference strains of all 26 BTV serotypes, as well as the field isolates tested. The serotype-specific primers showed no cross-amplification with reference strains of the remaining 25 serotypes, or multiple other isolates of the more closely related heterologous BTV types. The primers and RT-PCR assays developed in this study provide a rapid, sensitive and reliable method for the identification and differentiation of the twenty-six BTV serotypes, and will be updated periodically to maintain their relevance to current BTV distribution and epidemiology (http://www.reoviridae.org/dsRNA_virus_proteins/ReoID/rt-pcr-primers.htm).
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Affiliation(s)
- Narender S. Maan
- Arbovirus Molecular Research Group, Vector-Borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Sushila Maan
- Arbovirus Molecular Research Group, Vector-Borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Manjunatha N. Belaganahalli
- Arbovirus Molecular Research Group, Vector-Borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Eileen N. Ostlund
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, U.S. Department of Agriculture, Ames, Iowa, United States of America
| | - Donna J. Johnson
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, U.S. Department of Agriculture, Ames, Iowa, United States of America
| | - Kyriaki Nomikou
- Arbovirus Molecular Research Group, Vector-Borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
| | - Peter P. C. Mertens
- Arbovirus Molecular Research Group, Vector-Borne Viral Diseases Programme, Institute for Animal Health, Woking, Surrey, United Kingdom
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Maan S, Maan NS, Nomikou K, Veronesi E, Bachanek-Bankowska K, Belaganahalli MN, Attoui H, Mertens PPC. Complete genome characterisation of a novel 26th bluetongue virus serotype from Kuwait. PLoS One 2011; 6:e26147. [PMID: 22031822 PMCID: PMC3198726 DOI: 10.1371/journal.pone.0026147] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 09/20/2011] [Indexed: 11/18/2022] Open
Abstract
Bluetongue virus is the "type" species of the genus Orbivirus, family Reoviridae. Twenty four distinct bluetongue virus (BTV) serotypes have been recognized for decades, any of which is thought to be capable of causing "bluetongue" (BT), an insect-borne disease of ruminants. However, two further BTV serotypes, BTV-25 (Toggenburg orbivirus, from Switzerland) and BTV-26 (from Kuwait) have recently been identified in goats and sheep, respectively. The BTV genome is composed of ten segments of linear dsRNA, encoding 7 virus-structural proteins (VP1 to VP7) and four distinct non-structural (NS) proteins (NS1 to NS4). We report the entire BTV-26 genome sequence (isolate KUW2010/02) and comparisons to other orbiviruses. Highest identity levels were consistently detected with other BTV strains, identifying KUW2010/02 as BTV. The outer-core protein and major BTV serogroup-specific antigen "VP7" showed 98% aa sequence identity with BTV-25, indicating a common ancestry. However, higher level of variation in the nucleotide sequence of Seg-7 (81.2% identity) suggests strong conservation pressures on the protein of these two strains, and that they diverged a long time ago. Comparisons of Seg-2, encoding major outer-capsid component and cell-attachment protein "VP2" identified KUW2010/02 as 26th BTV, within a 12th Seg-2 nucleotype [nucleotype L]. Comparisons of Seg-6, encoding the smaller outer capsid protein VP5, also showed levels of nt/aa variation consistent with identification of KUW2010/02 as BTV-26 (within a 9th Seg-6 nucleotype - nucleotype I). Sequence data for Seg-2 of KUW2010/02 were used to design four sets of oligonucleotide primers for use in BTV-26, type-specific RT-PCR assays. Analyses of other more conserved genome segments placed KUW2010/02 and BTV-25/SWI2008/01 closer to each other than to other "eastern" or "western" BTV strains, but as representatives of two novel and distinct geographic groups (topotypes). Our analyses indicate that all of the BTV genome segments have evolved under strong purifying selection.
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Affiliation(s)
- Sushila Maan
- Vector-Borne Diseases Programme, Institute for Animal Health, Pirbright, Woking Surrey, United Kingdom
| | - Narender S. Maan
- Vector-Borne Diseases Programme, Institute for Animal Health, Pirbright, Woking Surrey, United Kingdom
| | - Kyriaki Nomikou
- Vector-Borne Diseases Programme, Institute for Animal Health, Pirbright, Woking Surrey, United Kingdom
| | - Eva Veronesi
- Vector-Borne Diseases Programme, Institute for Animal Health, Pirbright, Woking Surrey, United Kingdom
| | | | | | - Houssam Attoui
- Vector-Borne Diseases Programme, Institute for Animal Health, Pirbright, Woking Surrey, United Kingdom
| | - Peter P. C. Mertens
- Vector-Borne Diseases Programme, Institute for Animal Health, Pirbright, Woking Surrey, United Kingdom
- * E-mail:
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Belhouchet M, Mohd Jaafar F, Firth AE, Grimes JM, Mertens PPC, Attoui H. Detection of a fourth orbivirus non-structural protein. PLoS One 2011; 6:e25697. [PMID: 22022432 PMCID: PMC3192121 DOI: 10.1371/journal.pone.0025697] [Citation(s) in RCA: 158] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 09/08/2011] [Indexed: 12/22/2022] Open
Abstract
The genus Orbivirus includes both insect and tick-borne viruses. The orbivirus genome, composed of 10 segments of dsRNA, encodes 7 structural proteins (VP1–VP7) and 3 non-structural proteins (NS1–NS3). An open reading frame (ORF) that spans almost the entire length of genome segment-9 (Seg-9) encodes VP6 (the viral helicase). However, bioinformatic analysis recently identified an overlapping ORF (ORFX) in Seg-9. We show that ORFX encodes a new non-structural protein, identified here as NS4. Western blotting and confocal fluorescence microscopy, using antibodies raised against recombinant NS4 from Bluetongue virus (BTV, which is insect-borne), or Great Island virus (GIV, which is tick-borne), demonstrate that these proteins are synthesised in BTV or GIV infected mammalian cells, respectively. BTV NS4 is also expressed in Culicoides insect cells. NS4 forms aggregates throughout the cytoplasm as well as in the nucleus, consistent with identification of nuclear localisation signals within the NS4 sequence. Bioinformatic analyses indicate that NS4 contains coiled-coils, is related to proteins that bind nucleic acids, or are associated with membranes and shows similarities to nucleolar protein UTP20 (a processome subunit). Recombinant NS4 of GIV protects dsRNA from degradation by endoribonucleases of the RNAse III family, indicating that it interacts with dsRNA. However, BTV NS4, which is only half the putative size of the GIV NS4, did not protect dsRNA from RNAse III cleavage. NS4 of both GIV and BTV protect DNA from degradation by DNAse. NS4 was found to associate with lipid droplets in cells infected with BTV or GIV or transfected with a plasmid expressing NS4.
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Affiliation(s)
- Mourad Belhouchet
- Vector-Borne Viral Diseases Programme, Institute for Animal Health, Pirbright, United Kingdom
- Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, Oxford, United Kingdom
| | - Fauziah Mohd Jaafar
- Vector-Borne Viral Diseases Programme, Institute for Animal Health, Pirbright, United Kingdom
| | - Andrew E. Firth
- Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Jonathan M. Grimes
- Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, Oxford, United Kingdom
| | - Peter P. C. Mertens
- Vector-Borne Viral Diseases Programme, Institute for Animal Health, Pirbright, United Kingdom
| | - Houssam Attoui
- Vector-Borne Viral Diseases Programme, Institute for Animal Health, Pirbright, United Kingdom
- * E-mail:
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Anthony SJ, Darpel KE, Belaganahalli MN, Maan N, Nomikou K, Sutton G, Attoui H, Maan S, Mertens PPC. RNA segment 9 exists as a duplex concatemer in an Australian strain of epizootic haemorrhagic disease virus (EHDV): Genetic analysis and evidence for the presence of concatemers as a normal feature of orbivirus replication. Virology 2011; 420:164-71. [PMID: 21968198 DOI: 10.1016/j.virol.2011.09.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 08/11/2011] [Accepted: 09/12/2011] [Indexed: 11/26/2022]
Abstract
This paper reports a concatemeric RNA in a strain of epizootic haemorrhagic disease virus (EHDV) serotype 5. Sequencing showed that the concatemeric RNA contains two identical full-length copies of genome segment 9, arranged in series, which has apparently replaced the monomeric form of the segment. In vitro translation demonstrated that the concatemeric RNA can act as a viable template for VP6 translation, but that no double-sized protein is produced. Studies were also performed to assess whether mutations might be easily introduced into the second copy (which might indicate some potential evolutionary significance of a concatemeric RNA segment), however multiple (n=40) passages generated no changes in the sequence of either the upstream or downstream segments. Further, we present results that demonstrate the presence of concatemers or partial gene duplications in multiple segments of different orbiviruses (in tissue culture and purified virus), suggesting their generation is likely to be a normal feature of orbivirus replication.
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Affiliation(s)
- S J Anthony
- Vector-borne Disease Program, Institute for Animal Health, Ash Road, Pirbright, Surrey, GU24 0NF, UK.
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Maan S, Maan NS, Nomikou K, Batten C, Antony F, Belaganahalli MN, Samy AM, Reda AA, Al-Rashid SA, El Batel M, Oura CAL, Mertens PPC. Novel bluetongue virus serotype from Kuwait. Emerg Infect Dis 2011; 17:886-9. [PMID: 21529403 PMCID: PMC3321788 DOI: 10.3201/eid1705.101742] [Citation(s) in RCA: 174] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Sheep and goats sampled in Kuwait during February 2010 were seropositive for bluetongue virus (BTV). BTV isolate KUW2010/02, from 1 of only 2 sheep that also tested positive for BTV by real-time reverse transcription-PCR, caused mild clinical signs in sheep. Nucleotide sequencing identified KUW2010/02 as a novel BTV serotype.
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36
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Belaganahalli MN, Maan S, Maan NS, Tesh R, Attoui H, Mertens PPC. Umatilla virus genome sequencing and phylogenetic analysis: identification of stretch lagoon orbivirus as a new member of the Umatilla virus species. PLoS One 2011; 6:e23605. [PMID: 21897849 PMCID: PMC3163642 DOI: 10.1371/journal.pone.0023605] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 07/20/2011] [Indexed: 11/19/2022] Open
Abstract
The genus Orbivirus, family Reoviridae, includes 22 species of viruses with genomes composed of ten segments of linear dsRNA that are transmitted between their vertebrate hosts by insects or ticks, or with no identified vectors. Full-genome sequence data are available for representative isolates of the insect borne mammalian orbiviruses (including bluetongue virus), as well as a tick borne avian orbivirus (Great Island virus). However, no sequence data are as yet available for the mosquito borne avian orbiviruses.We report full-length, whole-genome sequence data for Umatilla virus (UMAV), a mosquito borne avian orbivirus from the USA, which belongs to the species Umatilla virus. Comparisons of conserved genome segments 1, 2 and 8 (Seg-1, Seg-2 and Seg-8) - encoding the polymerase-VP1, sub-core 'T2' protein and core-surface 'T13' protein, respectively, show that UMAV groups with the mosquito transmitted mammalian orbiviruses. The highest levels of sequence identity were detected between UMAV and Stretch Lagoon orbivirus (SLOV) from Australia, showing that they belong to the same virus species (with nt/aa identity of 76.04%/88.07% and 77.96%/95.36% in the polymerase and T2 genes and protein, respectively). The data presented here has assisted in identifying the SLOV as a member of the Umatilla serogroup. This sequence data reported here will also facilitate identification of new isolates, and epidemiological studies of viruses belonging to the species Umatilla virus.
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Affiliation(s)
| | - Sushila Maan
- Vector-borne Diseases Programme, Institute for Animal Health, Surrey, United Kingdom
| | - Narender S. Maan
- Vector-borne Diseases Programme, Institute for Animal Health, Surrey, United Kingdom
| | - Robert Tesh
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Houssam Attoui
- Vector-borne Diseases Programme, Institute for Animal Health, Surrey, United Kingdom
| | - Peter P. C. Mertens
- Vector-borne Diseases Programme, Institute for Animal Health, Surrey, United Kingdom
- * E-mail:
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37
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Matthijnssens J, Ciarlet M, McDonald SM, Attoui H, Bányai K, Brister JR, Buesa J, Esona MD, Estes MK, Gentsch JR, Iturriza-Gómara M, Johne R, Kirkwood CD, Martella V, Mertens PPC, Nakagomi O, Parreño V, Rahman M, Ruggeri FM, Saif LJ, Santos N, Steyer A, Taniguchi K, Patton JT, Desselberger U, Van Ranst M. Uniformity of rotavirus strain nomenclature proposed by the Rotavirus Classification Working Group (RCWG). Arch Virol 2011; 156:1397-413. [PMID: 21597953 DOI: 10.1007/s00705-011-1006-z] [Citation(s) in RCA: 731] [Impact Index Per Article: 56.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 04/19/2011] [Indexed: 12/31/2022]
Abstract
In April 2008, a nucleotide-sequence-based, complete genome classification system was developed for group A rotaviruses (RVs). This system assigns a specific genotype to each of the 11 genome segments of a particular RV strain according to established nucleotide percent cutoff values. Using this approach, the genome of individual RV strains are given the complete descriptor of Gx-P[x]-Ix-Rx-Cx-Mx-Ax-Nx-Tx-Ex-Hx. The Rotavirus Classification Working Group (RCWG) was formed by scientists in the field to maintain, evaluate and develop the RV genotype classification system, in particular to aid in the designation of new genotypes. Since its conception, the group has ratified 51 new genotypes: as of April 2011, new genotypes for VP7 (G20-G27), VP4 (P[28]-P[35]), VP6 (I12-I16), VP1 (R5-R9), VP2 (C6-C9), VP3 (M7-M8), NSP1 (A15-A16), NSP2 (N6-N9), NSP3 (T8-T12), NSP4 (E12-E14) and NSP5/6 (H7-H11) have been defined for RV strains recovered from humans, cows, pigs, horses, mice, South American camelids (guanaco), chickens, turkeys, pheasants, bats and a sugar glider. With increasing numbers of complete RV genome sequences becoming available, a standardized RV strain nomenclature system is needed, and the RCWG proposes that individual RV strains are named as follows: RV group/species of origin/country of identification/common name/year of identification/G- and P-type. In collaboration with the National Center for Biotechnology Information (NCBI), the RCWG is also working on developing a RV-specific resource for the deposition of nucleotide sequences. This resource will provide useful information regarding RV strains, including, but not limited to, the individual gene genotypes and epidemiological and clinical information. Together, the proposed nomenclature system and the NCBI RV resource will offer highly useful tools for investigators to search for, retrieve, and analyze the ever-growing volume of RV genomic data.
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Affiliation(s)
- Jelle Matthijnssens
- Laboratory of Clinical & Epidemiological Virology, Department of Microbiology & Immunology, Rega Institute for Medical Research, University of Leuven, Minderbroedersstraat 10, 3000, Leuven, Belgium.
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38
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Crafford JE, Guthrie AJ, Van Vuuren M, Mertens PPC, Burroughs JN, Howell PG, Batten CA, Hamblin C. A competitive ELISA for the detection of group-specific antibody to equine encephalosis virus. J Virol Methods 2011; 174:60-4. [PMID: 21458496 DOI: 10.1016/j.jviromet.2011.03.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 03/17/2011] [Accepted: 03/23/2011] [Indexed: 11/18/2022]
Abstract
A polyclonal antibody-based, group-specific, competitive ELISA (C-ELISA) for the detection of antibodies to equine encephalosis virus (EEV) was developed. The assay measures the competition between a specific guinea pig antiserum and a test serum, for a pre-titrated EEV antigen. The C-ELISA detected antibodies to the seven known EEV serotypes. Reference antisera raised against other arboviruses did not cross react with EEV antigen. Negative sera from horses in the United Kingdom were used to establish the baseline for a negative population. Negative and positive populations of South African horses, selected on the basis of virus neutralisation were assayed subsequently. Optimal test parameters, where sensitivity≅specificity≅100%, were calculated by two-graph receiver operator characteristic (TG-ROC) analysis to be at a cut-off value of 29.5% inhibition. Results show the EEV C-ELISA described to be sensitive, specific and reliable. Used in conjunction with ELISAs available for African horse sickness virus (AHSV), differential serological diagnosis between EEV and AHSV can be achieved.
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Affiliation(s)
- J E Crafford
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort 0110, South Africa
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39
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Darpel KE, Langner KFA, Nimtz M, Anthony SJ, Brownlie J, Takamatsu HH, Mellor PS, Mertens PPC. Saliva proteins of vector Culicoides modify structure and infectivity of bluetongue virus particles. PLoS One 2011; 6:e17545. [PMID: 21423801 PMCID: PMC3056715 DOI: 10.1371/journal.pone.0017545] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 02/08/2011] [Indexed: 11/18/2022] Open
Abstract
Bluetongue virus (BTV) and epizootic haemorrhagic disease virus (EHDV) are related orbiviruses, transmitted between their ruminant hosts primarily by certain haematophagous midge vectors (Culicoides spp.). The larger of the BTV outer-capsid proteins, 'VP2', can be cleaved by proteases (including trypsin or chymotrypsin), forming infectious subviral particles (ISVP) which have enhanced infectivity for adult Culicoides, or KC cells (a cell-line derived from C. sonorensis). We demonstrate that VP2 present on purified virus particles from 3 different BTV strains can also be cleaved by treatment with saliva from adult Culicoides. The saliva proteins from C. sonorensis (a competent BTV vector), cleaved BTV-VP2 more efficiently than those from C. nubeculosus (a less competent/non-vector species). Electrophoresis and mass spectrometry identified a trypsin-like protease in C. sonorensis saliva, which was significantly reduced or absent from C. nubeculosus saliva. Incubating purified BTV-1 with C. sonorensis saliva proteins also increased their infectivity for KC cells ∼10 fold, while infectivity for BHK cells was reduced by 2-6 fold. Treatment of an 'eastern' strain of EHDV-2 with saliva proteins of either C. sonorensis or C. nubeculosus cleaved VP2, but a 'western' strain of EHDV-2 remained unmodified. These results indicate that temperature, strain of virus and protein composition of Culicoides saliva (particularly its protease content which is dependent upon vector species), can all play a significant role in the efficiency of VP2 cleavage, influencing virus infectivity. Saliva of several other arthropod species has previously been shown to increase transmission, infectivity and virulence of certain arboviruses, by modulating and/or suppressing the mammalian immune response. The findings presented here, however, demonstrate a novel mechanism by which proteases in Culicoides saliva can also directly modify the orbivirus particle structure, leading to increased infectivity specifically for Culicoides cells and, in turn, efficiency of transmission to the insect vector.
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Affiliation(s)
- Karin E Darpel
- Pirbright Laboratory, Vector-borne Disease Programme, Institute for Animal Health, Woking, United Kingdom.
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40
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Williamson SM, Scholes SFE, Welchman DDB, Dennison M, Batten CA, Williams DL, Mertens PPC, Mellor PS, Darpel KE. Bluetongue virus serotype 8-associated hydranencephaly in two calves in south-eastern England. Vet Rec 2010; 167:216-8. [PMID: 20693506 DOI: 10.1136/vr.c3302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- S M Williamson
- Veterinary Laboratories Agency, Bury St Edmunds, Rougham Hill, Bury St Edmunds, Suffolk.
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41
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Maan NS, Maan S, Nomikou K, Johnson DJ, El Harrak M, Madani H, Yadin H, Incoglu S, Yesilbag K, Allison AB, Stallknecht DE, Batten C, Anthony SJ, Mertens PPC. RT-PCR assays for seven serotypes of epizootic haemorrhagic disease virus & their use to type strains from the Mediterranean region and North America. PLoS One 2010; 5:e12782. [PMID: 20862243 PMCID: PMC2941451 DOI: 10.1371/journal.pone.0012782] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Accepted: 08/16/2010] [Indexed: 11/18/2022] Open
Abstract
Epizootic haemorrhagic disease virus (EHDV) infects wild ruminants, causing a frequently fatal haemorrhagic disease. However, it can also cause bluetongue-like disease in cattle, involving significant levels of morbidity and mortality, highlighting a need for more rapid and reliable diagnostic assays. EHDV outer-capsid protein VP2 (encoded by genome-segment 2 [Seg-2]) is highly variable and represents the primary target for neutralising antibodies generated by the mammalian host. Consequently VP2 is also the primary determinant of virus "serotype", as identified in virus neutralisation tests (VNT). Although previous reports have indicated eight to ten EHDV serotypes, recent serological comparisons and molecular analyses of Seg-2 indicate only seven EHDV "types". Oligonucleotide primers were developed targeting Seg-2, for use in conventional RT-PCR assays to detect and identify these seven types. These assays, which are more rapid and sensitive, still show complete agreement with VNT and were used to identify recent EHDV isolates from the Mediterranean region and North America.
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Affiliation(s)
- Narender S. Maan
- Vector Borne Diseases Programme, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Sushila Maan
- Vector Borne Diseases Programme, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Kyriaki Nomikou
- Vector Borne Diseases Programme, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Donna J. Johnson
- United States Department of Agriculture (USDA) National Veterinary Services Laboratories, Ames, Iowa, United States of America
| | | | - Hafsa Madani
- Laboratoire Central Vétérinaire d'Alger, Hacen Badi, El Harrach, Alger, Algeria
| | - Hagai Yadin
- Kimron Veterinary Institute, Beit-Dagan, Israel
| | | | - Kadir Yesilbag
- Department of Virology, Uludag University Faculty of Veterinary Medicine, Gorukle, Bursa, Turkey
| | - Andrew B. Allison
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - David E. Stallknecht
- Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Carrie Batten
- Vector Borne Diseases Programme, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Simon J. Anthony
- Vector Borne Diseases Programme, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Peter P. C. Mertens
- Vector Borne Diseases Programme, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
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42
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Belhouchet M, Mohd Jaafar F, Tesh R, Grimes J, Maan S, Mertens PPC, Attoui H. Complete sequence of Great Island virus and comparison with the T2 and outer-capsid proteins of Kemerovo, Lipovnik and Tribec viruses (genus Orbivirus, family Reoviridae). J Gen Virol 2010; 91:2985-93. [PMID: 20739272 DOI: 10.1099/vir.0.024760-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The complete nucleotide sequence of Great Island virus (GIV) genome was determined, along with genome segments (Seg) 1, 2 and 6 of Kemerovo (KEMV), Lipovnik (LIPV) and Tribec (TRBV) viruses. All four viruses, together with Broadhaven virus, are currently classified within the species Great Island virus and have been isolated from ticks, birds or humans. Sequence comparisons showed that Seg-4 of GIV encoded the outer-capsid protein responsible for cell attachment, although it was approximately half the length of its counterpart in the Culicoides or mosquito-transmitted orbiviruses. A second overlapping ORF (in the +2 reading frame) was identified in Seg-9 of GIV, encoding a putative dsRNA-binding protein. Phylogenetic analyses of the RNA-dependent RNA polymerase (Pol) and T2 protein amino acid sequences indicated that the tick-borne orbiviruses represent an ancestral group from which the mosquito-borne orbiviruses have evolved. This mirrors the evolutionary relationships between the arthropod vectors of these viruses, supporting a co-speciation hypothesis for these arboviruses and their arthropod-vectors. Phylogenetic analyses of the T2 proteins of KEMV, LIPV, TRBV and GIV (showing 82% amino acid identity) correlated with the early classification of Great Island viruses as two distinct serocomplexes (Great Island and Kemerovo serocomplexes). Amino acid identity levels in the VP1(Pol) and T2 proteins between the two serocomplexes were 73 and 82%, respectively, whilst those between previously characterized Orbivirus species are 53-73% and 26-83%, respectively. These data suggest that, despite limited genome segment reassortment between these two groups, their current classification within the same Orbivirus species could be re-evaluated.
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Affiliation(s)
- Mourad Belhouchet
- Department of Vector-Borne Diseases, Institute for Animal Health, Pirbright, UK
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43
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Darpel KE, Batten CA, Veronesi E, Williamson S, Anderson P, Dennison M, Clifford S, Smith C, Philips L, Bidewell C, Bachanek-Bankowska K, Sanders A, Bin-Tarif A, Wilson AJ, Gubbins S, Mertens PPC, Oura CA, Mellor PS. Transplacental transmission of bluetongue virus 8 in cattle, UK. Emerg Infect Dis 2010; 15:2025-8. [PMID: 19961692 PMCID: PMC3044536 DOI: 10.3201/eid1512.090788] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
To determine whether transplacental transmission could explain overwintering of bluetongue virus in the United Kingdom, we studied calves born to dams naturally infected during pregnancy in 2007–08. Approximately 33% were infected transplacentally; some had compromised health. In all infected calves, viral load decreased after birth; no evidence of persistent infection was found.
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Affiliation(s)
- Karin E Darpel
- Institute for Animal Health, Pirbright Laboratory, Ash Road, Pirbright, Surrey GU240NF, UK.
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44
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Attoui H, Mendez-Lopez MR, Rao S, Hurtado-Alendes A, Lizaraso-Caparo F, Mohd Jaafar F, Samuel AR, Belhouchet M, Pritchard LI, Melville L, Weir RP, Hyatt AD, Davis SS, Lunt R, Calisher CH, Tesh RB, Fujita R, Mertens PPC. Peruvian horse sickness virus and Yunnan orbivirus, isolated from vertebrates and mosquitoes in Peru and Australia. Virology 2009; 394:298-310. [PMID: 19766284 DOI: 10.1016/j.virol.2009.08.032] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2009] [Revised: 07/21/2009] [Accepted: 08/21/2009] [Indexed: 11/19/2022]
Abstract
During 1997, two new viruses were isolated from outbreaks of disease that occurred in horses, donkeys, cattle and sheep in Peru. Genome characterization showed that the virus isolated from horses (with neurological disorders, 78% fatality) belongs to a new species the Peruvian horse sickness virus (PHSV), within the genus Orbivirus, family Reoviridae. This represents the first isolation of PHSV, which was subsequently also isolated during 1999, from diseased horses in the Northern Territory of Australia (Elsey virus, ELSV). Serological and molecular studies showed that PHSV and ELSV are very similar in the serotype-determining protein (99%, same serotype). The second virus (Rioja virus, RIOV) was associated with neurological signs in donkeys, cattle, sheep and dogs and was shown to be a member of the species Yunnan orbivirus (YUOV). RIOV and YUOV are also almost identical (97% amino acid identity) in the serotype-determining protein. YUOV was originally isolated from mosquitoes in China.
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Affiliation(s)
- Houssam Attoui
- Department of Vector Borne Diseases, Institute for Animal Health, Pirbright, Woking, Surrey, GU24 0NF, UK.
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45
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Anthony SJ, Darpel KE, Maan S, Sutton G, Attoui H, Mertens PPC. The evolution of two homologues of the core protein VP6 of epizootic haemorrhagic disease virus (EHDV), which correspond to the geographical origin of the virus. Virus Genes 2009; 40:67-75. [PMID: 19830536 DOI: 10.1007/s11262-009-0410-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2009] [Accepted: 09/30/2009] [Indexed: 11/25/2022]
Abstract
Epizootic haemorrhagic disease virus is a 10-segmented, double-stranded RNA virus. When these ten segments of dsRNA are run on 1% agarose, eastern (Australia, Japan) and western (North America, Africa, Middle-East) strains of the virus can be separated phenotypically based on the migration of genome segments 7-9. In western strains, segments 7-9 are roughly the same size and co-migrate as a single RNA band. In eastern strains, segment 9 is smaller, so while segments 7 and 8 co-migrate, the segment 9 RNA runs faster than its western homologue. Translation experiments demonstrated that these two segment 9 homologues are both functional and produce proteins (VP6) of different sizes-something that has not been reported in any other orbivirus species to date. Sequence analysis suggests that eastern and western versions of segment 9 (VP6) have likely evolved as a response to adaptive selection in different geographical regions via gene duplication and subsequent mutation. These significant findings are considered unusual given the conserved nature of VP6 and its presumed role as the viral helicase. It is not currently known what the biological relevance of each homologue is to the virus.
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Affiliation(s)
- S J Anthony
- Vector-Borne Diseases Program, Institute for Animal Health, Ash Road, Pirbright, Surrey, GU24 0NF, UK.
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46
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Nomikou K, Dovas CΙ, Maan S, Anthony SJ, Samuel AR, Papanastassopoulou M, Maan NS, Mangana O, Mertens PPC. Evolution and phylogenetic analysis of full-length VP3 genes of Eastern Mediterranean bluetongue virus isolates. PLoS One 2009; 4:e6437. [PMID: 19649272 PMCID: PMC2713410 DOI: 10.1371/journal.pone.0006437] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Accepted: 05/02/2009] [Indexed: 11/19/2022] Open
Abstract
Bluetongue virus (BTV) is the ‘type’ species of the genus Orbivirus within the family Reoviridae. The BTV genome is composed of ten linear segments of double-stranded RNA (dsRNA), each of which codes for one of ten distinct viral proteins. Previous phylogenetic comparisons have evaluated variations in genome segment 3 (Seg-3) nucleotide sequence as way to identify the geographical origin (different topotypes) of BTV isolates. The full-length nucleotide sequence of genome Seg-3 was determined for thirty BTV isolates recovered in the eastern Mediterranean region, the Balkans and other geographic areas (Spain, India, Malaysia and Africa). These data were compared, based on molecular variability, positive-selection-analysis and maximum-likelihood phylogenetic reconstructions (using appropriate substitution models) to 24 previously published sequences, revealing their evolutionary relationships. These analyses indicate that negative selection is a major force in the evolution of BTV, restricting nucleotide variability, reducing the evolutionary rate of Seg-3 and potentially of other regions of the BTV genome. Phylogenetic analysis of the BTV-4 strains isolated over a relatively long time interval (1979–2000), in a single geographic area (Greece), showed a low level of nucleotide diversity, indicating that the virus can circulate almost unchanged for many years. These analyses also show that the recent incursions into south-eastern Europe were caused by BTV strains belonging to two different major-lineages: representing an ‘eastern’ (BTV-9, -16 and -1) and a ‘western’ (BTV-4) group/topotype. Epidemiological and phylogenetic analyses indicate that these viruses originated from a geographic area to the east and southeast of Greece (including Cyprus and the Middle East), which appears to represent an important ecological niche for the virus that is likely to represent a continuing source of future BTV incursions into Europe.
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Affiliation(s)
- Kyriaki Nomikou
- Arbovirus Molecular Research Group, Department of vector borne diseases, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
- Virus Laboratory, Institute of Infectious and Parasitic Diseases, Ministry of Rural Development and Food, Athens, Greece
| | - Chrysostomos Ι. Dovas
- Department of Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Sushila Maan
- Arbovirus Molecular Research Group, Department of vector borne diseases, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Simon J. Anthony
- Wildlife Disease Laboratory, San Diego Zoo Conservation Research, Escondido, California, United States of America
| | - Alan R. Samuel
- Arbovirus Molecular Research Group, Department of vector borne diseases, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Maria Papanastassopoulou
- Department of Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Narender S. Maan
- Arbovirus Molecular Research Group, Department of vector borne diseases, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
| | - Olga Mangana
- Virus Laboratory, Institute of Infectious and Parasitic Diseases, Ministry of Rural Development and Food, Athens, Greece
| | - Peter P. C. Mertens
- Arbovirus Molecular Research Group, Department of vector borne diseases, Institute for Animal Health, Pirbright Laboratory, Woking, Surrey, United Kingdom
- * E-mail:
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47
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Anthony SJ, Maan N, Maan S, Sutton G, Attoui H, Mertens PPC. Genetic and phylogenetic analysis of the core proteins VP1, VP3, VP4, VP6 and VP7 of epizootic haemorrhagic disease virus (EHDV). Virus Res 2009; 145:187-99. [PMID: 19632280 DOI: 10.1016/j.virusres.2009.07.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 07/15/2009] [Accepted: 07/16/2009] [Indexed: 11/29/2022]
Abstract
The core proteins of epizootic haemorrhagic disease virus (EHDV) have important roles to perform in maintaining the structure and function of the virus. A complete genetic and phylogenetic analysis was therefore performed on these proteins (and the genes that code for them) to allow comparison of the selective pressures acting on each. Accession numbers, gene and protein sizes, ORF positions, G+C contents, terminal hexanucleotides, start and stop codons and phylogenetic relationships are all presented. The inner core proteins (VP1, VP3, VP4 and VP6) were characterised by high levels of sequence conservation, and the ability to topotype isolates very strongly into eastern or western groups. This is particularly evident in genome segment 9 (VP6) which exists as two different sized homologues. VP7 did not topotype, but rather exhibited a more random, radial phylogeny suggestive of genetic drift. With the exception of VP6, all of the core proteins also showed high numbers of synonymous mutations in the third base position, suggesting they have been evolving for a long period of time. Interestingly, VP6 did not show this, and possible reasons for this are discussed.
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Affiliation(s)
- S J Anthony
- Vector-borne Diseases Program, Institute for Animal Health, Ash Road, Pirbright, Surrey GU24 0NF, United Kingdom.
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48
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Anthony SJ, Maan S, Maan N, Kgosana L, Bachanek-Bankowska K, Batten C, Darpel KE, Sutton G, Attoui H, Mertens PPC. Genetic and phylogenetic analysis of the outer-coat proteins VP2 and VP5 of epizootic haemorrhagic disease virus (EHDV): comparison of genetic and serological data to characterise the EHDV serogroup. Virus Res 2009; 145:200-10. [PMID: 19632281 DOI: 10.1016/j.virusres.2009.07.012] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 07/15/2009] [Accepted: 07/16/2009] [Indexed: 11/24/2022]
Abstract
The outer-coat proteins, VP2 and VP5, of epizootic haemorrhagic disease virus (EHDV) are important for host cell binding during the initiation of infection. They are also known to determine virus serotype. This study presents a complete genetic and phylogenetic analysis of these proteins (and the genes that code for them) to allow comparison of the selective pressures acting on each and the correlation of genetic sequence data with serotype. Accession numbers, gene and protein sizes, ORF positions, G+C contents, terminal hexanucleotides, start and stop codons and phylogenetic relationships are all presented. The results show that VP2 is highly variable, is under great pressure to adapt and can be correlated with serotype. While also variable, VP5 appears to be under less adaptive pressure than VP2 but still shows some correlation with serotype. Seven serotypes of EHDV have been defined in this study, although the results do show that some serotypes are extremely closely related--and highlight the benefit of using both molecular and serologic analyses. Analysis of the terminal hexanucleotides showed that the 5' terminus is under greater purifying selection than the 3'. Evidence is also presented that both segments 2 and 6 (coding for VP2 and VP5 respectively) have grown via gene duplication and subsequent mutation.
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Affiliation(s)
- S J Anthony
- Vector-borne Diseases Program, Institute for Animal Health, Ash Road, Pirbright, Surrey GU24 0NF, United Kingdom.
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49
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Purse BV, Brown HE, Harrup L, Mertens PPC, Rogers DJ. Invasion of bluetongue and other orbivirus infections into Europe: the role of biological and climatic processes. REV SCI TECH OIE 2008; 27:427-442. [PMID: 18819670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The invasion of multiple strains of the midge-borne bluetongue virus into southern Europe since the late 1990s provides a rare example of a clear impact of climate change on a vector-borne disease. However, the subsequent dramatic continent-wide spread and burden of this disease has depended largely on altered biotic interactions with vector and host communities in newly invaded areas. Transmission by Palearctic vectors has facilitated the establishment of the disease in cooler and wetter areas of both northern and southern Europe. This paper discusses the important biological and climatic processes involved in these invasions, and the lessons that must be drawn for effective risk management of bluetongue and other midge-borne viruses in Europe.
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Affiliation(s)
- B V Purse
- Natural Environment Research Council (NERC) Centre for Ecology and Hydrology, Bush Estate, Penicuik, Edinburgh, United Kingdom
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50
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Abstract
Bluetongue virus (BTV) exists around the world in a broad band covering much of the Americas, Africa, southern Asia and northern Australia. Historically, it also occasionally occurred in the southern fringes of Europe. It is considered to be one of the most important diseases of domestic livestock. Recently BTV has extended its range northwards into areas of Europe never before affected and has persisted in many of these locations causing the greatest epizootic of bluetongue (BT), the disease caused by BTV, on record. Indeed, the most recent outbreaks of BT in Europe are further north than this virus has ever previously occurred anywhere in the world. The reasons for this dramatic change in BT epidemiology are complex but are linked to recent extensions in the distribution of its major vector, Culicoides imicola, to the involvement of novel Culicoides vector(s) and to on-going climate-change. This paper investigates these recent outbreaks in the European theatre, up to the beginning of 2006, highlights prospects for the future and sets the scene for the following papers in this special issue.
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Affiliation(s)
- Philip S Mellor
- Institute for Animal Health, Pirbright Laboratory, Pirbright, Woking, Surrey, UK.
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