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Issaka S, Traoré O, Longué RDS, Pinel-Galzi A, Gill MS, Dellicour S, Bastide P, Guindon S, Hébrard E, Dugué MJ, Séré Y, Semballa S, Aké S, Lemey P, Fargette D. Rivers and landscape ecology of a plant virus, Rice yellow mottle virus along the Niger Valley. Virus Evol 2021; 7:veab072. [PMID: 36819970 PMCID: PMC9927878 DOI: 10.1093/ve/veab072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 08/08/2021] [Accepted: 08/16/2021] [Indexed: 11/14/2022] Open
Abstract
To investigate the spread of Rice yellow mottle virus (RYMV) along the Niger River, regular sampling of virus isolates was conducted along 500 km of the Niger Valley in the Republic of Niger and was complemented by additional sampling in neighbouring countries in West Africa and Central Africa. The spread of RYMV into and within the Republic of Niger was inferred as a continuous process using a Bayesian statistical framework applied previously to reconstruct its dispersal history in West Africa, East Africa, and Madagascar. The spatial resolution along this section of the Niger River was the highest implemented for RYMV and possibly for any plant virus. We benefited from the results of early field surveys of the disease for the validation of the phylogeographic reconstruction and from the well-documented history of rice cultivation changes along the Niger River for their interpretation. As a prerequisite, the temporal signal of the RYMV data sets was revisited in the light of recent methodological advances. The role of the hydrographic network of the Niger Basin in RYMV spread was examined, and the link between virus population dynamics and the extent of irrigated rice was assessed. RYMV was introduced along the Niger River in the Republic of Niger in the early 1980s from areas to the southwest of the country where rice was increasingly grown. Viral spread was triggered by a major irrigation scheme made of a set of rice perimeters along the river valley. The subsequent spatial and temporal host continuity and the inoculum build-up allowed for a rapid spread of RYMV along the Niger River, upstream and downstream, over hundreds of kilometres, and led to the development of severe epidemics. There was no evidence of long-distance dissemination of the virus through natural water. Floating rice in the main meanders of the Middle Niger did not contribute to virus dispersal from West Africa to Central Africa. RYMV along the Niger River is an insightful example of how agricultural intensification favours pathogen emergence and spread.
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Affiliation(s)
| | - Oumar Traoré
- Laboratoire de Virologie et de Biotechnologie Végétale (LVBV), Laboratoire National de Biosécurité, Institut de l'Environnement et de Recherches Agricoles (INERA), Ouagadougou 01 BP 476, Burkina Faso
| | - Régis Dimitri Skopé Longué
- Laboratoire des Sciences Biologiques et Agronomiques pour le Développement (LaSBAD), Département des Sciences de la Vie, Université de Bangui, Bangui BP 908, République Centrafricaine
| | - Agnès Pinel-Galzi
- PHIM Plant Health Institute, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro., Montpellier cedex 5 BP 64501 34394, France
| | - Mandev S Gill
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Herestraat 49, Leuven 3000, Belgium
| | - Simon Dellicour
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Herestraat 49, Leuven 3000, Belgium,Spatial Epidemiology Lab. (SpELL), Université Libre de Bruxelles, CP160/12, 50, av. FD Roosevelt, Bruxelles 1050, Belgium
| | - Paul Bastide
- IMAG – UMR 5149, Université de Montpellier, Case courrier 051, Place Eugène Bataillon, Montpellier 34090, France
| | - Stéphane Guindon
- Department of Computer Science, LIRMM, CNRS and Université de Montpellier, Montpellier, France
| | - Eugénie Hébrard
- PHIM Plant Health Institute, Université de Montpellier, IRD, CIRAD, INRAE, Institut Agro., Montpellier cedex 5 BP 64501 34394, France
| | - Marie-Jo Dugué
- Agronomy and Farming Systems, 3 avenue des Cistes, Saint Mathieu de Tréviers 34270, France
| | - Yacouba Séré
- Agricultural Research and Development, Bobo-Dioulasso BP 1324, Burkina Faso
| | - Silla Semballa
- Laboratoire des Sciences Biologiques et Agronomiques pour le Développement (LaSBAD), Département des Sciences de la Vie, Université de Bangui, Bangui BP 908, République Centrafricaine
| | - Séverin Aké
- UFR Biosciences, Laboratoire de Physiologie Végétale, Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’Ivoire
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52
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Duchêne S, Ho SYW, Carmichael AG, Holmes EC, Poinar H. The Recovery, Interpretation and Use of Ancient Pathogen Genomes. Curr Biol 2021; 30:R1215-R1231. [PMID: 33022266 PMCID: PMC7534838 DOI: 10.1016/j.cub.2020.08.081] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The ability to sequence genomes from ancient biological material has provided a rich source of information for evolutionary biology and engaged considerable public interest. Although most studies of ancient genomes have focused on vertebrates, particularly archaic humans, newer technologies allow the capture of microbial pathogens and microbiomes from ancient and historical human and non-human remains. This coming of age has been made possible by techniques that allow the preferential capture and amplification of discrete genomes from a background of predominantly host and environmental DNA. There are now near-complete ancient genome sequences for three pathogens of considerable historical interest — pre-modern bubonic plague (Yersinia pestis), smallpox (Variola virus) and cholera (Vibrio cholerae) — and for three equally important endemic human disease agents — Mycobacterium tuberculosis (tuberculosis), Mycobacterium leprae (leprosy) and Treponema pallidum pallidum (syphilis). Genomic data from these pathogens have extended earlier work by paleopathologists. There have been efforts to sequence the genomes of additional ancient pathogens, with the potential to broaden our understanding of the infectious disease burden common to past populations from the Bronze Age to the early 20th century. In this review we describe the state-of-the-art of this rapidly developing field, highlight the contributions of ancient pathogen genomics to multidisciplinary endeavors and describe some of the limitations in resolving questions about the emergence and long-term evolution of pathogens.
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Affiliation(s)
- Sebastián Duchêne
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC 3000, Australia.
| | - Simon Y W Ho
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2006, Australia
| | | | - Edward C Holmes
- Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Life and Environmental Sciences and School of Medical Sciences, University of Sydney, Sydney, NSW 2006, Australia.
| | - Hendrik Poinar
- McMaster Ancient DNA Centre, Departments of Anthropology and Biochemistry, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4L9, Canada; Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4L8, Canada; Humans and the Microbiome Program, Canadian Institute for Advanced Research, Toronto, Canada.
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53
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Ingle DJ, Ambrose RL, Baines SL, Duchene S, Gonçalves da Silva A, Lee DYJ, Jones M, Valcanis M, Taiaroa G, Ballard SA, Kirk MD, Howden BP, Pearson JS, Williamson DA. Evolutionary dynamics of multidrug resistant Salmonella enterica serovar 4,[5],12:i:- in Australia. Nat Commun 2021; 12:4786. [PMID: 34373455 PMCID: PMC8352879 DOI: 10.1038/s41467-021-25073-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 07/20/2021] [Indexed: 02/07/2023] Open
Abstract
Salmonella enterica serovar 4,[5],12:i:- (Salmonella 4,[5],12:i:-) is a monophasic variant of Salmonella Typhimurium that has emerged as a global cause of multidrug resistant salmonellosis. We used Bayesian phylodynamics, genomic epidemiology, and phenotypic characterization to describe the emergence and evolution of Salmonella 4,[5],12:i:- in Australia. We show that the interruption of the genetic region surrounding the phase II flagellin, FljB, causing a monophasic phenotype, represents a stepwise evolutionary event through the accumulation of mobile resistance elements with minimal impairment to bacterial fitness. We identify three lineages with different population dynamics and discrete antimicrobial resistance profiles emerged, likely reflecting differential antimicrobial selection pressures. Two lineages are associated with travel to South-East Asia and the third lineage is endemic to Australia. Moreover antimicrobial-resistant Salmonella 4,[5],12:i- lineages efficiently infected and survived in host phagocytes and epithelial cells without eliciting significant cellular cytotoxicity, suggesting a suppression of host immune response that may facilitate the persistence of Salmonella 4,[5],12:i:-.
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Affiliation(s)
- Danielle J Ingle
- Research School of Population Health, Australian National University, Canberra, ACT, Australia.
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
| | - Rebecca L Ambrose
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Research, Monash University, Melbourne, VIC, Australia
- Department of Microbiology, Monash University, Melbourne, VIC, Australia
| | - Sarah L Baines
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Sebastian Duchene
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Anders Gonçalves da Silva
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Darren Y J Lee
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Miriam Jones
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Research, Monash University, Melbourne, VIC, Australia
- Department of Microbiology, Monash University, Melbourne, VIC, Australia
| | - Mary Valcanis
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - George Taiaroa
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Susan A Ballard
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Martyn D Kirk
- Research School of Population Health, Australian National University, Canberra, ACT, Australia
| | - Benjamin P Howden
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Jaclyn S Pearson
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Research, Monash University, Melbourne, VIC, Australia
- Department of Microbiology, Monash University, Melbourne, VIC, Australia
| | - Deborah A Williamson
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
- Department of Microbiology, Royal Melbourne Hospital, Melbourne, VIC, Australia.
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54
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Lin SK, De Maio N, Pedergnana V, Wu CH, Thézé J, Wilson DJ, Barnes E, Ansari MA. Using host genetics to infer the global spread and evolutionary history of HCV subtype 3a. Virus Evol 2021; 7:veab065. [PMID: 34532064 PMCID: PMC8438900 DOI: 10.1093/ve/veab065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/16/2021] [Accepted: 07/08/2021] [Indexed: 11/17/2022] Open
Abstract
Studies have shown that hepatitis C virus subtype 3a (HCV-3a) is likely to have been circulating in South Asia before its global spread. However, the time and route of this dissemination remain unclear. For the first time, we generated host and virus genome-wide data for more than 500 patients infected with HCV-3a from the UK, North America, Australia, and New Zealand. We used the host genomic data to infer the ancestry of the patients and used this information to investigate the epidemic history of HCV-3a. We observed that viruses from hosts of South Asian ancestry clustered together near the root of the tree, irrespective of the sampling country, and that they were more diverse than viruses from other host ancestries. We hypothesized that South Asian hosts are more likely to have been infected in South Asia and used the inferred host ancestries to distinguish between the location where the infection was acquired and where the sample was taken. Next, we inferred that three independent transmission events resulted in the spread of the virus from South Asia to the UK, North America, and Oceania. This initial spread happened during or soon after the end of World War II. This was subsequently followed by many independent transmissions between the UK, North America, and Oceania. Using both host and virus genomic information can be highly informative in studying the virus epidemic history, especially in the context of chronic infections where migration histories need to be accounted for.
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Affiliation(s)
| | | | - Vincent Pedergnana
- MIVEGEC, Université de Montpellier, CNRS, 911 avenue Agropolis, Montpellier 34000, France
| | - Chieh-Hsi Wu
- Building 54, Mathematical Sciences University of Southampton, Highfield, Southampton SO17 1BJ, UK
| | - Julien Thézé
- Department of Zoology, University of Oxford, South Parks Road, Oxford, Oxfordshire OX1 3PS, UK,Université Clermont Auvergne, INRAE, VetAgro Sup, UMR EPIA, Centre INRAE Clermont-Auvergne-Rhône-Alpes, Saint-Genès-Champanelle 63122, France
| | | | - Eleanor Barnes
- Peter Medawar Building for Pathogen Research, University of Oxford, South Parks Road, Oxford, Oxfordshire OX1 3SY, UK
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55
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Wang L, Didelot X, Bi Y, Gao GF. Assessing the extent of community spread caused by mink-derived SARS-CoV-2 variants. Innovation (N Y) 2021; 2:100128. [PMID: 34124706 PMCID: PMC8182980 DOI: 10.1016/j.xinn.2021.100128] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 06/03/2021] [Indexed: 12/13/2022] Open
Abstract
SARS-CoV-2 has recently been found to have spread from humans to minks and then to have transmitted back to humans. However, it is unknown to what extent the human-to-human transmission caused by the variant has reached. Here, we used publicly available SARS-CoV-2 genomic sequences from both humans and minks collected in Denmark and the Netherlands, and combined phylogenetic analysis with Bayesian inference under an epidemiological model, to trace the possibility of person-to-person transmission. The results showed that at least 12.5% of all people being infected with dominated mink-derived SARS-CoV-2 variants in Denmark and the Netherlands were caused by human-to-human transmission, indicating that this “back-to-human” SARS-CoV-2 variant has already caused human-to-human transmission. Our study also indicated the need for monitoring this mink-derived and other animal source “back-to-human” SARS-CoV-2 in future and that prevention and control measures should be tailored to avoid large-scale community transmission caused by the virus jumping between animals and humans. SARS-CoV-2 transmission from human to mink is not lineage specific Mink-derived SARS-CoV-2 variants keep human-to-human transmission At least 12.5% of patients with mink-derived SARS-CoV-2 were caused by human-to-human transmission
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Affiliation(s)
- Liang Wang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing 100101, China
| | - Xavier Didelot
- School of Life Sciences and Department of Statistics, University of Warwick, Coventry CV4 7AL, UK
| | - Yuhai Bi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 101408, China
| | - George F Gao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing 100101, China.,University of Chinese Academy of Sciences, Beijing 101408, China
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56
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Bainomugisa A, Meumann EM, Rajahram GS, Ong RTH, Coin L, Paul DC, William T, Coulter C, Ralph AP. Genomic epidemiology of tuberculosis in eastern Malaysia: insights for strengthening public health responses. Microb Genom 2021; 7:000573. [PMID: 33945455 PMCID: PMC8209721 DOI: 10.1099/mgen.0.000573] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 03/29/2021] [Indexed: 11/29/2022] Open
Abstract
Tuberculosis is a leading public health priority in eastern Malaysia. Knowledge of the genomic epidemiology of tuberculosis can help tailor public health interventions. Our aims were to determine tuberculosis genomic epidemiology and characterize resistance mutations in the ethnically diverse city of Kota Kinabalu, Sabah, located at the nexus of Malaysia, Indonesia, Philippines and Brunei. We used an archive of prospectively collected Mycobacterium tuberculosis samples paired with epidemiological data. We collected sputum and demographic data from consecutive consenting outpatients with pulmonary tuberculosis at the largest tuberculosis clinic from 2012 to 2014, and selected samples from tuberculosis inpatients from the tertiary referral centre during 2012-2014 and 2016-2017. Two hundred and eight M. tuberculosis sequences were available for analysis, representing 8 % of cases notified during the study periods. Whole-genome phylogenetic analysis demonstrated that most strains were lineage 1 (195/208, 93.8 %), with the remainder being lineages 2 (8/208, 3.8 %) or 4 (5/208, 2.4 %). Lineages or sub-lineages were not associated with patient ethnicity. The lineage 1 strains were diverse, with sub-lineage 1.2.1 being dominant (192, 98 %). Lineage 1.2.1.3 isolates were geographically most widely distributed. The greatest diversity occurred in a border town sub-district. The time to the most recent common ancestor for the three major lineage 1.2.1 clades was estimated to be the year 1966 (95 % HPD 1948-1976). An association was found between failure of culture conversion by week 8 of treatment and infection with lineage 2 (4/6, 67 %) compared with lineage 1 strains (4/83, 5 %) (P<0.001), supporting evidence of greater virulence of lineage 2 strains. Eleven potential transmission clusters (SNP difference ≤12) were identified; at least five included people living in different sub-districts. Some linked cases spanned the whole 4-year study period. One cluster involved a multidrug-resistant tuberculosis strain matching a drug-susceptible strain from 3 years earlier. Drug resistance mutations were uncommon, but revealed one phenotype-genotype mismatch in a genotypically multidrug-resistant isolate, and rare nonsense mutations within the katG gene in two isolates. Consistent with the regionally mobile population, M. tuberculosis strains in Kota Kinabalu were diverse, although several lineage 1 strains dominated and were locally well established. Transmission clusters - uncommonly identified, likely attributable to incomplete sampling - showed clustering occurring across the community, not confined to households or sub-districts. The findings indicate that public health priorities should include active case finding and early institution of tuberculosis management in mobile populations, while there is a need to upscale effective contact investigation beyond households to include other contacts within social networks.
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Affiliation(s)
| | - Ella M. Meumann
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
- Department of Medicine, Royal Darwin Hospital, Northern Territory, Australia
| | - Giri Shan Rajahram
- Infectious Diseases Society Sabah-Menzies School of Health Research Clinical Research Unit, Kota Kinabalu, Sabah, Malaysia
- Department of Medicine, Queen Elizabeth Hospital, Kota Kinabalu, Sabah, Malaysia
- Clinical Research Centre, Queen Elizabeth Hospital, Sabah, Malaysia
| | - Rick Twee-Hee Ong
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
| | - Lachlan Coin
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia
| | | | - Timothy William
- Infectious Diseases Society Sabah-Menzies School of Health Research Clinical Research Unit, Kota Kinabalu, Sabah, Malaysia
- Clinical Research Centre, Queen Elizabeth Hospital, Sabah, Malaysia
- Gleneagles Hospital Kota Kinabalu, Sabah, Malaysia
| | | | - Anna P. Ralph
- Queensland Mycobacterium Reference Laboratory, Brisbane, Australia
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
- Department of Medicine, Royal Darwin Hospital, Northern Territory, Australia
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57
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Hong SL, Lemey P, Suchard MA, Baele G. Bayesian Phylogeographic Analysis Incorporating Predictors and Individual Travel Histories in BEAST. Curr Protoc 2021; 1:e98. [PMID: 33836121 DOI: 10.1002/cpz1.98] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Advances in sequencing technologies have tremendously reduced the time and costs associated with sequence generation, making genomic data an important asset for routine public health practices. Within this context, phylogenetic and phylogeographic inference has become a popular method to study disease transmission. In a Bayesian context, these approaches have the benefit of accommodating phylogenetic uncertainty, and popular implementations provide the possibility to parameterize the transition rates between locations as a function of epidemiological and ecological data to reconstruct spatial spread while simultaneously identifying the main factors impacting the spatial spread dynamics. Recent developments enable researchers to make use of travel history data of infected individuals in the reconstruction of pathogen spread, offering increased inference accuracy and mitigating sampling bias. Here, we describe a detailed workflow to reconstruct the spatial spread of a pathogen through Bayesian phylogeographic analysis in discrete space using these novel approaches, implemented in BEAST. The individual protocols focus on how to incorporate molecular data, covariates of spread, and individual travel history data into the analysis. © 2021 Wiley Periodicals LLC. Basic Protocol 1: Creating a SARS-CoV-2 MSA using sequences from GISAID Basic Protocol 2: Setting up a discrete trait phylogeographic reconstruction in BEAUti Basic Protocol 3: Phylogeographic reconstruction incorporating travel history information Basic Protocol 4: Visualizing ancestral spatial trajectories for specific taxa.
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Affiliation(s)
- Samuel L Hong
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Laboratory of Clinical and Evolutionary Virology, Leuven, Belgium
| | - Philippe Lemey
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Laboratory of Clinical and Evolutionary Virology, Leuven, Belgium
| | - Marc A Suchard
- Department of Biomathematics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California.,Department of Biostatistics, Fielding School of Public Health, University of California Los Angeles, Los Angeles, California.,Department of Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| | - Guy Baele
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Laboratory of Clinical and Evolutionary Virology, Leuven, Belgium
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Abstract
The rooting of the SARS-CoV-2 phylogeny is important for understanding the origin and early spread of the virus. Previously published phylogenies have used different rootings that do not always provide consistent results. We investigate several different strategies for rooting the SARS-CoV-2 tree and provide measures of statistical uncertainty for all methods. We show that methods based on the molecular clock tend to place the root in the B clade, whereas methods based on outgroup rooting tend to place the root in the A clade. The results from the two approaches are statistically incompatible, possibly as a consequence of deviations from a molecular clock or excess back-mutations. We also show that none of the methods provide strong statistical support for the placement of the root in any particular edge of the tree. These results suggest that phylogenetic evidence alone is unlikely to identify the origin of the SARS-CoV-2 virus and we caution against strong inferences regarding the early spread of the virus based solely on such evidence.
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Affiliation(s)
- Lenore Pipes
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Hongru Wang
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, USA
| | - John P Huelsenbeck
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Rasmus Nielsen
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, USA
- Department of Statistics, University of California, Berkeley, Berkeley, CA, USA
- Globe Institute, University of Copenhagen, Copenhagen, Denmark
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59
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Ingle DJ, Howden BP, Duchene S. Development of Phylodynamic Methods for Bacterial Pathogens. Trends Microbiol 2021; 29:788-797. [PMID: 33736902 DOI: 10.1016/j.tim.2021.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/13/2021] [Accepted: 02/15/2021] [Indexed: 11/30/2022]
Abstract
Phylodynamic methods have been essential to understand the interplay between the evolution and epidemiology of infectious diseases. To date, the field has centered on viruses. Bacterial pathogens are seldom analyzed under such phylodynamic frameworks, due to their complex genome evolution and, until recently, a paucity of whole-genome sequence data sets with rich associated metadata. We posit that the increasing availability of bacterial genomes and epidemiological data means that the field is now ripe to lay the foundations for applying phylodynamics to bacterial pathogens. The development of new methods that integrate more complex genomic and ecological data will help to inform public heath surveillance and control strategies for bacterial pathogens that represent serious threats to human health.
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Affiliation(s)
- Danielle J Ingle
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Victoria, Australia; National Centre for Epidemiology and Population Health, The Australian National University, Canberra, Australia; Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Victoria, Australia
| | - Benjamin P Howden
- Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Victoria, Australia; Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Victoria, Australia; Doherty Applied Microbial Genomics, Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Victoria, Australia
| | - Sebastian Duchene
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Victoria, Australia.
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60
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Bletsa M, Vrancken B, Gryseels S, Boonen I, Fikatas A, Li Y, Laudisoit A, Lequime S, Bryja J, Makundi R, Meheretu Y, Akaibe BD, Mbalitini SG, Van de Perre F, Van Houtte N, Těšíková J, Wollants E, Van Ranst M, Pybus OG, Drexler JF, Verheyen E, Leirs H, Gouy de Bellocq J, Lemey P. Molecular detection and genomic characterization of diverse hepaciviruses in African rodents. Virus Evol 2021; 7:veab036. [PMID: 34221451 PMCID: PMC8242229 DOI: 10.1093/ve/veab036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Hepatitis C virus (HCV; genus Hepacivirus) represents a major public health problem, infecting about three per cent of the human population. Because no animal reservoir carrying closely related hepaciviruses has been identified, the zoonotic origins of HCV still remain unresolved. Motivated by recent findings of divergent hepaciviruses in rodents and a plausible African origin of HCV genotypes, we have screened a large collection of small mammals samples from seven sub-Saharan African countries. Out of 4,303 samples screened, eighty were found positive for the presence of hepaciviruses in twenty-nine different host species. We, here, report fifty-six novel genomes that considerably increase the diversity of three divergent rodent hepacivirus lineages. Furthermore, we provide strong evidence for hepacivirus co-infections in rodents, which were exclusively found in four sampled species of brush-furred mice. We also detect evidence of recombination within specific host lineages. Our study expands the available hepacivirus genomic data and contributes insights into the relatively deep evolutionary history of these pathogens in rodents. Overall, our results emphasize the importance of rodents as a potential hepacivirus reservoir and as models for investigating HCV infection dynamics.
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Affiliation(s)
- Magda Bletsa
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Bram Vrancken
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Sophie Gryseels
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
- Department of Biology, Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium
| | - Ine Boonen
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Antonios Fikatas
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Yiqiao Li
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | | | - Sebastian Lequime
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Josef Bryja
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic
| | - Rhodes Makundi
- Pest Management Center -Sokoine University of Agriculture, Morogoro, Tanzania
| | - Yonas Meheretu
- Department of Biology and Institute of Mountain Research & Development, Mekelle University, Mekelle, Ethiopia
| | - Benjamin Dudu Akaibe
- Department of Ecology and Animal Resource Management, Faculty of Science, Biodiversity Monitoring Center, University of Kisangani, Kisangani, Democratic Republic of the Congo
| | - Sylvestre Gambalemoke Mbalitini
- Department of Ecology and Animal Resource Management, Faculty of Science, Biodiversity Monitoring Center, University of Kisangani, Kisangani, Democratic Republic of the Congo
| | - Frederik Van de Perre
- Department of Biology, Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium
| | - Natalie Van Houtte
- Department of Biology, Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium
| | - Jana Těšíková
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Elke Wollants
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Marc Van Ranst
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Oliver G Pybus
- Department of Zoology, University of Oxford, Oxford, UK
- Department of Pathobiology and Population Sciences, The Royal Veterinary College, London, UK
| | - Jan Felix Drexler
- Charite-Universitatsmedizin Berlin, Berlin, Germany
- German Center for Infection Research (DZIF), Berlin, Germany
| | - Erik Verheyen
- Department of Biology, Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium
- OD Taxonomy and Phylogeny-Royal Belgian Institute of Natural Sciences, Brussels, Belgium
| | - Herwig Leirs
- Department of Biology, Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium
| | | | - Philippe Lemey
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
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61
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Xu Y, Zhang S, Shen J, Wu Z, Du Z, Gao F. The phylogeographic history of tomato mosaic virus in Eurasia. Virology 2020; 554:42-47. [PMID: 33360588 DOI: 10.1016/j.virol.2020.12.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 11/19/2022]
Abstract
Tomato mosaic virus (ToMV) is a tobamovirus affecting solanaceous crops worldwide. The process of its emergence, however, is poorly understood. Here, Bayesian phylogenetic framework was employed to reconstruct the phylogeography of ToMV in Eurasia. The results showed that the ToMV in Europe, Middle East and East Asia has been evolving at a rate of 4.05 × 10-4 substitutions/site/year (95% credibility interval 2.43 × 10-4 - 5.62 × 10-4). Their most recent common ancestor (MRCA), most probably first appeared in Europe, was dated to around 1757 Common Era. The first introduction of ToMV into Middle East occurred in 1920s, with Europe as the source, while the first introduction of ToMV into East Asia occurred shortly afterwards, with Middle East as the source. From about 1950 onwards, inter-regional migrations of ToMV between Europe, Middle East and East Asia have been common. Overall, these data provide a glimpse into the phylogeographic history of ToMV in Eurasia.
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Affiliation(s)
- Yuting Xu
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Shuling Zhang
- Department of Horticulture and Garden, Fujian Vocational College of Agriculture, Fuzhou, Fujian, 350119, China
| | - Jianguo Shen
- Technology Center of Fuzhou Customs District, Fuzhou, 350001, China
| | - Zujian Wu
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhenguo Du
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Fangluan Gao
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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62
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Lemey P, Hong SL, Hill V, Baele G, Poletto C, Colizza V, O'Toole Á, McCrone JT, Andersen KG, Worobey M, Nelson MI, Rambaut A, Suchard MA. Accommodating individual travel history and unsampled diversity in Bayesian phylogeographic inference of SARS-CoV-2. Nat Commun 2020; 11:5110. [PMID: 33037213 PMCID: PMC7547076 DOI: 10.1038/s41467-020-18877-9] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 09/17/2020] [Indexed: 12/21/2022] Open
Abstract
Spatiotemporal bias in genome sampling can severely confound discrete trait phylogeographic inference. This has impeded our ability to accurately track the spread of SARS-CoV-2, the virus responsible for the COVID-19 pandemic, despite the availability of unprecedented numbers of SARS-CoV-2 genomes. Here, we present an approach to integrate individual travel history data in Bayesian phylogeographic inference and apply it to the early spread of SARS-CoV-2. We demonstrate that including travel history data yields i) more realistic hypotheses of virus spread and ii) higher posterior predictive accuracy compared to including only sampling location. We further explore methods to ameliorate the impact of sampling bias by augmenting the phylogeographic analysis with lineages from undersampled locations. Our reconstructions reinforce specific transmission hypotheses suggested by the inclusion of travel history data, but also suggest alternative routes of virus migration that are plausible within the epidemiological context but are not apparent with current sampling efforts.
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Affiliation(s)
- Philippe Lemey
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Laboratory of Clinical and Evolutionary Virology, Leuven, Belgium.
| | - Samuel L Hong
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Laboratory of Clinical and Evolutionary Virology, Leuven, Belgium
| | - Verity Hill
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3FL, UK
| | - Guy Baele
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Laboratory of Clinical and Evolutionary Virology, Leuven, Belgium
| | - Chiara Poletto
- INSERM, Sorbonne Université, Institut Pierre Louis d'Epidémiologie et de Santé Publique IPLESP, F75012, Paris, France
| | - Vittoria Colizza
- INSERM, Sorbonne Université, Institut Pierre Louis d'Epidémiologie et de Santé Publique IPLESP, F75012, Paris, France
| | - Áine O'Toole
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3FL, UK
| | - John T McCrone
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3FL, UK
| | - Kristian G Andersen
- Department of Immunology and Microbiology, Scripps Research, La Jolla, CA, 92037, USA
| | - Michael Worobey
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - Martha I Nelson
- Division of International Epidemiology and Population Studies, Fogarty International Center, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Andrew Rambaut
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3FL, UK
| | - Marc A Suchard
- Department of Biomathematics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Biostatistics, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA.
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63
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Duchene S, Featherstone L, Haritopoulou-Sinanidou M, Rambaut A, Lemey P, Baele G. Temporal signal and the phylodynamic threshold of SARS-CoV-2. Virus Evol 2020; 6:veaa061. [PMID: 33235813 PMCID: PMC7454936 DOI: 10.1093/ve/veaa061] [Citation(s) in RCA: 250] [Impact Index Per Article: 62.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The ongoing SARS-CoV-2 outbreak marks the first time that large amounts of genome sequence data have been generated and made publicly available in near real time. Early analyses of these data revealed low sequence variation, a finding that is consistent with a recently emerging outbreak, but which raises the question of whether such data are sufficiently informative for phylogenetic inferences of evolutionary rates and time scales. The phylodynamic threshold is a key concept that refers to the point in time at which sufficient molecular evolutionary change has accumulated in available genome samples to obtain robust phylodynamic estimates. For example, before the phylodynamic threshold is reached, genomic variation is so low that even large amounts of genome sequences may be insufficient to estimate the virus’s evolutionary rate and the time scale of an outbreak. We collected genome sequences of SARS-CoV-2 from public databases at eight different points in time and conducted a range of tests of temporal signal to determine if and when the phylodynamic threshold was reached, and the range of inferences that could be reliably drawn from these data. Our results indicate that by 2 February 2020, estimates of evolutionary rates and time scales had become possible. Analyses of subsequent data sets, that included between 47 and 122 genomes, converged at an evolutionary rate of about 1.1 × 10−3 subs/site/year and a time of origin of around late November 2019. Our study provides guidelines to assess the phylodynamic threshold and demonstrates that establishing this threshold constitutes a fundamental step for understanding the power and limitations of early data in outbreak genome surveillance.
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Affiliation(s)
- Sebastian Duchene
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Victoria, Australia, 3000
| | - Leo Featherstone
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Victoria, Australia, 3000
| | - Melina Haritopoulou-Sinanidou
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Victoria, Australia, 3000
| | - Andrew Rambaut
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, UK
| | - Philippe Lemey
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Guy Baele
- Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
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64
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Boni MF, Lemey P, Jiang X, Lam TTY, Perry BW, Castoe TA, Rambaut A, Robertson DL. Evolutionary origins of the SARS-CoV-2 sarbecovirus lineage responsible for the COVID-19 pandemic. Nat Microbiol 2020; 5:1408-1417. [DOI: 10.1038/s41564-020-0771-4] [Citation(s) in RCA: 568] [Impact Index Per Article: 142.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 07/10/2020] [Indexed: 02/07/2023]
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65
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Düx A, Lequime S, Patrono LV, Vrancken B, Boral S, Gogarten JF, Hilbig A, Horst D, Merkel K, Prepoint B, Santibanez S, Schlotterbeck J, Suchard MA, Ulrich M, Widulin N, Mankertz A, Leendertz FH, Harper K, Schnalke T, Lemey P, Calvignac-Spencer S. Measles virus and rinderpest virus divergence dated to the sixth century BCE. Science 2020; 368:1367-1370. [PMID: 32554594 DOI: 10.1126/science.aba9411] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 04/30/2020] [Indexed: 12/11/2022]
Abstract
Many infectious diseases are thought to have emerged in humans after the Neolithic revolution. Although it is broadly accepted that this also applies to measles, the exact date of emergence for this disease is controversial. We sequenced the genome of a 1912 measles virus and used selection-aware molecular clock modeling to determine the divergence date of measles virus and rinderpest virus. This divergence date represents the earliest possible date for the establishment of measles in human populations. Our analyses show that the measles virus potentially arose as early as the sixth century BCE, possibly coinciding with the rise of large cities.
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Affiliation(s)
- Ariane Düx
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany.,Viral Evolution Project Group, Robert Koch Institute, Berlin, Germany
| | - Sebastian Lequime
- Laboratory of Clinical and Evolutionary Virology, Department of Microbiology, Immunology and Transplantation, Rega Institute, Katholieke Universiteit (KU) Leuven, Leuven, Belgium
| | - Livia Victoria Patrono
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany.,Viral Evolution Project Group, Robert Koch Institute, Berlin, Germany
| | - Bram Vrancken
- Laboratory of Clinical and Evolutionary Virology, Department of Microbiology, Immunology and Transplantation, Rega Institute, Katholieke Universiteit (KU) Leuven, Leuven, Belgium
| | - Sengül Boral
- Institute for Pathology, Charité, Berlin, Germany
| | - Jan F Gogarten
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany.,Viral Evolution Project Group, Robert Koch Institute, Berlin, Germany
| | - Antonia Hilbig
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany
| | - David Horst
- Institute for Pathology, Charité, Berlin, Germany
| | - Kevin Merkel
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany.,Viral Evolution Project Group, Robert Koch Institute, Berlin, Germany
| | - Baptiste Prepoint
- Viral Evolution Project Group, Robert Koch Institute, Berlin, Germany.,Département de Biologie, Ecole Normale Supérieure, PSL Université Paris, Paris, France
| | - Sabine Santibanez
- National Reference Centre for Measles, Mumps, and Rubella, Robert Koch Institute, Berlin, Germany
| | | | - Marc A Suchard
- Department of Biostatistics, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, CA, USA.,Department of Biomathematics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA.,Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - Markus Ulrich
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany
| | - Navena Widulin
- Berlin Museum of Medical History, Charité, Berlin, Germany
| | - Annette Mankertz
- National Reference Centre for Measles, Mumps, and Rubella, Robert Koch Institute, Berlin, Germany
| | - Fabian H Leendertz
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany
| | - Kyle Harper
- Department of Classics and Letters, University of Oklahoma, Norman, OK, USA
| | | | - Philippe Lemey
- Laboratory of Clinical and Evolutionary Virology, Department of Microbiology, Immunology and Transplantation, Rega Institute, Katholieke Universiteit (KU) Leuven, Leuven, Belgium
| | - Sébastien Calvignac-Spencer
- Epidemiology of Highly Pathogenic Microorganisms Project Group, Robert Koch Institute, Berlin, Germany. .,Viral Evolution Project Group, Robert Koch Institute, Berlin, Germany
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