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20 results on '"Spagnoletti, Matteo"'

1. Recent Asian origin of chytrid fungi causing global amphibian declines

Author

O’Hanlon, Simon J., Rieux, Adrien, Farrer, Rhys A., Rosa, Gonçalo M., Waldman, Bruce, Bataille, Arnaud, Kosch, Tiffany A., Murray, Kris A., Brankovics, Balázs, Fumagalli, Matteo, Martin, Michael D., Wales, Nathan, Alvarado-Rybak, Mario, Bates, Kieran A., Berger, Lee, Böll, Susanne, Brookes, Lola, Clare, Frances, Courtois, Elodie A., Cunningham, Andrew A., Doherty-Bone, Thomas M., Ghosh, Pria, Gower, David J., Hintz, William E., Höglund, Jacob, Jenkinson, Thomas S., Lin, Chun-Fu, Laurila, Anssi, Loyau, Adeline, Martel, An, Meurling, Sara, Miaud, Claude, Minting, Pete, Pasmans, Frank, Schmeller, Dirk S., Schmidt, Benedikt R., Shelton, Jennifer M. G., Skerratt, Lee F., Smith, Freya, Soto-Azat, Claudio, Spagnoletti, Matteo, Tessa, Giulia, Toledo, Luís Felipe, Valenzuela-Sánchez, Andrés, Verster, Ruhan, Vörös, Judit, Webb, Rebecca J., Wierzbicki, Claudia, Wombwell, Emma, Zamudio, Kelly R., Aanensen, David M., James, Timothy Y., Gilbert, M. Thomas P., Weldon, Ché, Bosch, Jaime, Balloux, François, Garner, Trenton W. J., and Fisher, Matthew C.

Published
2018

5. New V. cholerae atypical El Tor variant emerged during the 2006 epidemic outbreak in Angola

Author

Cappuccinelli Piero, Bacciu Donatella, Spagnoletti Matteo, Ceccarelli Daniela, and Colombo Mauro M

Subjects
Microbiology, QR1-502
Abstract

Abstract Background V. cholerae is the etiological agent of cholera, a major public health concern in most developing countries. Virulence of V. cholerae relies on the powerful cholera toxin, encoded by the CTX prophage. The emergence of new pathogenic variants in the recent years has been mostly associated with new CTX prophage rearrangements. Results In this retrospective study, we show that the epidemic V. cholerae O1 El Tor strain responsible for the 2006 outbreak in Angola is clonally and genetically different from El Tor strains circulating in the 1990s in the same area. Strains from 2006 carry ICEVchAng3 of the SXT/R391 family. This ICE is associated with a narrower multidrug resistance profile compared to the one conferred by plasmid p3iANG to strains of the 1990s. The CTX prophage carried by 2006 El Tor strains is characterized by rstRET and ctxBCla alleles organized in a RS1-RS2-Core array on chromosome I. Interestingly, the newly emerging atypical strain belongs to a clade previously known to comprise only clinical isolates from the Indian subcontinent that also contain the same ICE of the SXT/R391 family. Conclusions Our findings remark the appearance of a novel V. cholerae epidemic variant in Africa with a new CTXΦ arrangement previously described only in the Indian Subcontinent.

Published
2011
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6. Recent Asian origin of chytrid fungi causing global amphibian declines

Author

O'Hanlon, Simon J., Rieux, Adrien, Farrer, Rhys A., Rosa, Goncalo M., Waldman, Bruce, Bataille, Arnaud, Kosch, Tiffany A., Murray, Kris A., Brankovics, Balazs, Fumagalli, Matteo, Martin, Michael D., Wales, Nathan, Alvarado-Rybak, Mario, Bates, Kieran A., Berger, Lee, Boell, Susanne, Brookes, Lola, Clare, Frances, Courtois, Elodie A., Cunningham, Andrew A., Doherty-Bone, Thomas M., Ghosh, Pria, Gower, David J., Hintz, William E., Höglund, Jacob, Jenkinson, Thomas S., Lin, Chun-Fu, Laurila, Anssi, Loyau, Adeline, Martel, An, Meurling, Sara, Miaud, Claude, Minting, Pete, Pasmans, Frank, Schmeller, Dirk S., Schmidt, Benedikt R., Shelton, Jennifer M. G., Skerratt, Lee F., Smith, Freya, Soto-Azat, Claudio, Spagnoletti, Matteo, Tessa, Giulia, Toledo, Luis Felipe, Valenzuela-Sanchez, Andres, Verster, Ruhan, Voros, Judit, Webb, Rebecca J., Wierzbicki, Claudia, Wombwell, Emma, Zamudio, Kelly R., Aanensen, David M., James, Timothy Y., Gilbert, M. Thomas P., Weldon, Che, Bosch, Jaime, Balloux, Francois, Garner, Trenton W. J., Fisher, Matthew C., O'Hanlon, Simon J., Rieux, Adrien, Farrer, Rhys A., Rosa, Goncalo M., Waldman, Bruce, Bataille, Arnaud, Kosch, Tiffany A., Murray, Kris A., Brankovics, Balazs, Fumagalli, Matteo, Martin, Michael D., Wales, Nathan, Alvarado-Rybak, Mario, Bates, Kieran A., Berger, Lee, Boell, Susanne, Brookes, Lola, Clare, Frances, Courtois, Elodie A., Cunningham, Andrew A., Doherty-Bone, Thomas M., Ghosh, Pria, Gower, David J., Hintz, William E., Höglund, Jacob, Jenkinson, Thomas S., Lin, Chun-Fu, Laurila, Anssi, Loyau, Adeline, Martel, An, Meurling, Sara, Miaud, Claude, Minting, Pete, Pasmans, Frank, Schmeller, Dirk S., Schmidt, Benedikt R., Shelton, Jennifer M. G., Skerratt, Lee F., Smith, Freya, Soto-Azat, Claudio, Spagnoletti, Matteo, Tessa, Giulia, Toledo, Luis Felipe, Valenzuela-Sanchez, Andres, Verster, Ruhan, Voros, Judit, Webb, Rebecca J., Wierzbicki, Claudia, Wombwell, Emma, Zamudio, Kelly R., Aanensen, David M., James, Timothy Y., Gilbert, M. Thomas P., Weldon, Che, Bosch, Jaime, Balloux, Francois, Garner, Trenton W. J., and Fisher, Matthew C.

Abstract

Globalized infectious diseases are causing species declines worldwide, but their source often remains elusive. We used whole-genome sequencing to solve the spatiotemporal origins of themost devastating panzootic to date, caused by the fungus Batrachochytrium dendrobatidis, a proximate driver of global amphibian declines. We traced the source of B. dendrobatidis to the Korean peninsula, where one lineage, BdASIA-1, exhibits the genetic hallmarks of an ancestral population that seeded the panzootic. We date the emergence of this pathogen to the early 20th century, coinciding with the global expansion of commercial trade in amphibians, and we show that intercontinental transmission is ongoing. Our findings point to East Asia as a geographic hotspot for B. dendrobatidis biodiversity and the original source of these lineages that now parasitize amphibians worldwide.

Published
2018
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7. Recent Asian origin of chytrid fungi causing global amphibian declines

Author

Natural Environment Research Council (UK), Leverhulme Trust, Hungarian Scientific Research Fund, Hungarian Academy of Sciences, Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Royal Geographical Society, National Research Foundation of Korea, Governo do Estado de São Paulo, Australian Research Council, Wolfson Foundation, Swedish Research Council, National Research Foundation (South Africa), Iranian National Science Foundation, Natural Sciences and Engineering Research Council of Canada, O’Hanlon, Simon J., Rieux, Adrien, Farrer, Rhys A., Rosa, Gonçalo M., Waldman, Bruce, Bataille, Arnaud, Kosch, Tiffany A., Murray, Kris A., Brankovics, Balázs, Fumagalli, Matteo, Martin, Michael D., Wales, Nathan, Alvarado-Rybak, Mario, Bates, Kieran A., Berger, Lee R., Böll, Susanne, Brookes, Lola, Clare, Frances C., Courtois, Elodie A., Cunningham, Andrew A., Doherty-Bone, Thomas M., Ghosh, Pria, Gower, David J., Hintz, William E., Höglund, Jacob, Jenkinson, Thomas S., Lin, Chun-Fu, Laurila, Anssi, Loyau, A., Martel, An, Meurling, Sara, Miaud, Claude, Minting, Pete, Pasmans, Frank, Schmeller, Dirk S., Schmidt, Benedikt R., Shelton, Jennifer M. G., Skerratt, Lee, Smith, Freya, Soto-Azat, Claudio, Spagnoletti, Matteo, Tessa, Giulia, Toledo, Luis Felipe, Valenzuela-Sánchez, Andrés, Verster, Ruhan, Vörös, Judit, Webb, Rebecca J., Wierzbicki, Claudia, Wombwell, Emma, Zamudio, Kelly R., Aanensen, David M., James, Timothy Y., Gilbert, M. Thomas P., Weldon, Ché, Bosch, Jaime, Balloux, François, Garner, Trenton W. J., Fisher, Matthew C., Natural Environment Research Council (UK), Leverhulme Trust, Hungarian Scientific Research Fund, Hungarian Academy of Sciences, Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Royal Geographical Society, National Research Foundation of Korea, Governo do Estado de São Paulo, Australian Research Council, Wolfson Foundation, Swedish Research Council, National Research Foundation (South Africa), Iranian National Science Foundation, Natural Sciences and Engineering Research Council of Canada, O’Hanlon, Simon J., Rieux, Adrien, Farrer, Rhys A., Rosa, Gonçalo M., Waldman, Bruce, Bataille, Arnaud, Kosch, Tiffany A., Murray, Kris A., Brankovics, Balázs, Fumagalli, Matteo, Martin, Michael D., Wales, Nathan, Alvarado-Rybak, Mario, Bates, Kieran A., Berger, Lee R., Böll, Susanne, Brookes, Lola, Clare, Frances C., Courtois, Elodie A., Cunningham, Andrew A., Doherty-Bone, Thomas M., Ghosh, Pria, Gower, David J., Hintz, William E., Höglund, Jacob, Jenkinson, Thomas S., Lin, Chun-Fu, Laurila, Anssi, Loyau, A., Martel, An, Meurling, Sara, Miaud, Claude, Minting, Pete, Pasmans, Frank, Schmeller, Dirk S., Schmidt, Benedikt R., Shelton, Jennifer M. G., Skerratt, Lee, Smith, Freya, Soto-Azat, Claudio, Spagnoletti, Matteo, Tessa, Giulia, Toledo, Luis Felipe, Valenzuela-Sánchez, Andrés, Verster, Ruhan, Vörös, Judit, Webb, Rebecca J., Wierzbicki, Claudia, Wombwell, Emma, Zamudio, Kelly R., Aanensen, David M., James, Timothy Y., Gilbert, M. Thomas P., Weldon, Ché, Bosch, Jaime, Balloux, François, Garner, Trenton W. J., and Fisher, Matthew C.

Abstract

Globalized infectious diseases are causing species declines worldwide, but their source often remains elusive. We used whole-genome sequencing to solve the spatiotemporal origins of the most devastating panzootic to date, caused by the fungus Batrachochytrium dendrobatidis, a proximate driver of global amphibian declines. We traced the source of B. dendrobatidis to the Korean peninsula, where one lineage, BdASIA-1, exhibits the genetic hallmarks of an ancestral population that seeded the panzootic. We date the emergence of this pathogen to the early 20th century, coinciding with the global expansion of commercial trade in amphibians, and we show that intercontinental transmission is ongoing. Our findings point to East Asia as a geographic hotspot for B. dendrobatidis biodiversity and the original source of these lineages that now parasitize amphibians worldwide.

Published
2018

9. Inferences from tip-calibrated phylogenies: conceptual bases, applications and prospects in plant-pathogenic bacteria

Author

Rieux, Adrien, Eldholm, Vegard, Spagnoletti, Matteo, and Balloux, François

Subjects
H20 - Maladies des plantes
Abstract

Molecular dating of phylogenetic trees is a growing discipline using sequence data to co-estimate the timing of evolutionary events with rates of molecular evolution. Ail molecular-dating methods require converting genetic divergence between sequences into absolute time. Historically, this could only be achieved by associating externally derived dates obtained from fossil or biogeographical evidence to internal nodes of the tree. In some cases, notably for fast-evolving organisms such as viruses and some bacteria, the timespan over which samples were collected may cover a significant proportion of the time since they last shared a common ancestor. This situation allows phylogenetic trees to be calibrated by associating sampling dates directly to the sequences representing the tips of the tree. The increasing availability of genomic data from ancient DNA extends the applicability of such tip-based calibration to a new panel of organisms for which fossil data are rarely available. In this talk, 1 will introduce the rationale for performing tip-dating inferences, review some recent applications in a variety of organisms and discuss the prospect of carrying out such analyses in plantpathogenic bacteria systems.

Published
2016

10. Oral microbiomes from hunter‐gatherers and traditional farmers reveal shifts in commensal balance and pathogen load linked to diet.

Author

Lassalle, Florent, Spagnoletti, Matteo, Fumagalli, Matteo, Shaw, Liam, Dyble, Mark, Walker, Catherine, Thomas, Mark G., Bamberg Migliano, Andrea, and Balloux, Francois

Subjects
*HUMAN microbiota, *CHRONIC diseases, *DENTAL care, *HUNTERS, *FARMERS
Abstract

Abstract: Maladaptation to modern diets has been implicated in several chronic disorders. Given the higher prevalence of disease such as dental caries and chronic gum diseases in industrialized societies, we sought to investigate the impact of different subsistence strategies on oral health and physiology, as documented by the oral microbiome. To control for confounding variables such as environment and host genetics, we sampled saliva from three pairs of populations of hunter‐gatherers and traditional farmers living in close proximity in the Philippines. Deep shotgun sequencing of salivary DNA generated high‐coverage microbiomes along with human genomes. Comparing these microbiomes with publicly available data from individuals living on a Western diet revealed that abundance ratios of core species were significantly correlated with subsistence strategy, with hunter‐gatherers and Westerners occupying either end of a gradient of Neisseria against Haemophilus, and traditional farmers falling in between. Species found preferentially in hunter‐gatherers included microbes often considered as oral pathogens, despite their hosts' apparent good oral health. Discriminant analysis of gene functions revealed vitamin B5 autotrophy and urease‐mediated pH regulation as candidate adaptations of the microbiome to the hunter‐gatherer and Western diets, respectively. These results suggest that major transitions in diet selected for different communities of commensals and likely played a role in the emergence of modern oral pathogens. [ABSTRACT FROM AUTHOR]

Published
2018
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20. Recent Asian origin of chytrid fungi causing global amphibian declines.

Author

O'Hanlon SJ, Rieux A, Farrer RA, Rosa GM, Waldman B, Bataille A, Kosch TA, Murray KA, Brankovics B, Fumagalli M, Martin MD, Wales N, Alvarado-Rybak M, Bates KA, Berger L, Böll S, Brookes L, Clare F, Courtois EA, Cunningham AA, Doherty-Bone TM, Ghosh P, Gower DJ, Hintz WE, Höglund J, Jenkinson TS, Lin CF, Laurila A, Loyau A, Martel A, Meurling S, Miaud C, Minting P, Pasmans F, Schmeller DS, Schmidt BR, Shelton JMG, Skerratt LF, Smith F, Soto-Azat C, Spagnoletti M, Tessa G, Toledo LF, Valenzuela-Sánchez A, Verster R, Vörös J, Webb RJ, Wierzbicki C, Wombwell E, Zamudio KR, Aanensen DM, James TY, Gilbert MTP, Weldon C, Bosch J, Balloux F, Garner TWJ, and Fisher MC

Subjects
Africa, Americas, Animals, Asia, Australia, Chytridiomycota classification, Chytridiomycota genetics, Chytridiomycota isolation & purification, Chytridiomycota pathogenicity, Europe, Genes, Fungal, Genetic Variation, Hybridization, Genetic, Korea, Phylogeny, Sequence Analysis, DNA, Virulence, Amphibians microbiology, Extinction, Biological
Abstract

Globalized infectious diseases are causing species declines worldwide, but their source often remains elusive. We used whole-genome sequencing to solve the spatiotemporal origins of the most devastating panzootic to date, caused by the fungus Batrachochytrium dendrobatidis , a proximate driver of global amphibian declines. We traced the source of B. dendrobatidis to the Korean peninsula, where one lineage, Bd ASIA-1, exhibits the genetic hallmarks of an ancestral population that seeded the panzootic. We date the emergence of this pathogen to the early 20th century, coinciding with the global expansion of commercial trade in amphibians, and we show that intercontinental transmission is ongoing. Our findings point to East Asia as a geographic hotspot for B. dendrobatidis biodiversity and the original source of these lineages that now parasitize amphibians worldwide., (Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)

Published
2018
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