41 Works

Data from: Individual correlates of infectivity of influenza A virus infections in households

Tim Tsang, Vicky Fang, Kwok-Hung Chan, Dennis Ip, Gabriel Leung, J. S. Peiris, Benjamin Cowling, Simon Cauchemez, Tim K. Tsang, Vicky J. Fang, Dennis K. M. Ip, Gabriel M. Leung, J. S. Malik Peiris & Benjamin J. Cowling
Background: Identifying individual correlates of infectivity of influenza virus is important for disease control and prevention. Viral shedding is used as a proxy measure of infectivity in many studies. However, the evidence for this is limited. Methods: In a detailed study of influenza virus transmission within households in 2008–12, we recruited index cases with confirmed influenza infection from outpatient clinics, and followed up their household contacts for 7–10 days to identify secondary infections. We used...

Data from: Spontaneous nongenetic variation of group size creates cheater-free groups of social microbes

Michaela Amherd, Gregory J. Velicer & Olaya Rendueles
In social organisms, cheaters that gain a fitness advantage by defecting from the costs of cooperation reduce the average level of cooperation in a population. Such “cheating load” can be severe enough to cause local extinction events when cooperation is necessary for survival, but can also mediate group-level selection against cheaters across spatially structured groups that vary in cheater frequency. In cheater-laden populations, such variation could be generated by the formation of new homogeneous groups...

Data from: Generalized bootstrap supports for phylogenetic analyses of protein sequences incorporating alignment uncertainty

Maria Chatzou, Evan Wade Floden, Paolo Di Tommaso, Olivier Gascuel & Cedric Notredame
Phylogenetic reconstructions are essential in genomics data analyses and depend on accurate multiple sequence alignment (MSA) models. We show that all currently available large-scale progressive multiple alignment methods are numerically unstable when dealing with amino-acid sequences. They produce significantly different output when changing sequence input order. We used the HOMFAM protein sequences dataset to show that on datasets larger than 100 sequences, this instability affects on average 21.5% of the aligned residues. The resulting Maximum...

Data from: The complex relationship of exposure to new Plasmodium infections and incidence of clinical malaria in Papua New Guinea

Natalie E. Hofmann, Stephan Karl, Rahel Wampfler, Benson Kiniboro, Albina Teliki, Jonah Iga, Andreea Waltmann, Inoni Betuela, Ingrid Felger, Leanne J. Robinson & Ivo Mueller
The molecular force of blood-stage infection (molFOB) is a quantitative surrogate metric for malaria transmission at population level and for exposure at individual level. Relationships between molFOB, parasite prevalence and clinical incidence were assessed in a treatment-to-reinfection cohort, where P.vivax (Pv) hypnozoites were eliminated in half the children by primaquine (PQ). Discounting relapses, children acquired equal numbers of new P. falciparum (Pf) and Pv blood-stage infections/year (Pf-molFOB=0-18, Pv-molFOB=0-23) resulting in comparable spatial and temporal patterns...

Data from: Chimeric viruses blur the borders between the major groups of eukaryotic single-stranded DNA viruses

Simon Roux, François Enault, Gisèle Bronner, Daniel Vaulot, Patrick Forterre & Mart Krupovic
Metagenomic studies have uncovered an astonishing diversity of ssDNA viruses encoding replication proteins (Reps) related to those of eukaryotic Circoviridae, Geminiviridae or Nanoviridae; however, exact evolutionary relationships among these viruses remain obscure. Recently, a unique chimeric virus (CHIV) genome, which has apparently emerged via recombination between ssRNA and ssDNA viruses, has been discovered. Here we report on the assembly of 13 new CHIV genomes recovered from various environments. Our results indicate a single event of...

Data from: Metagenomic chromosome conformation capture (meta3C) unveils the diversity of chromosome organization in microorganisms

Martial Marbouty, Axel Cournac, Jean-Francois Flot, Herve Marie-Nelly, Julien Mozziconacci & Romain Koszul
Genomic analyses of microbial populations in their natural environment remain limited by the difficulty to assemble full genomes of individual species. Consequently, the chromosome organization of microorganisms has been investigated in a few model species, but the extent to which the features described can be generalized to other taxa remains unknown. Using controlled mixes of bacterial and yeast species, we developed meta3C, a metagenomic chromosome conformation capture approach that allows characterizing individual genomes and their...

Data from: Evidence of human infection by a new mammarenavirus endemic to Southeastern Asia.

Kim R. Blasdell, Veasna Duong, Marc Eloit, Fabrice Chretien, Sowath Ly, Vibol Hul, Vincent Deubel, Serge Morand & Philippe Buchy
Southeastern Asia is a recognised hotspot for emerging infectious diseases, many of which have an animal origin. Mammarenavirus infections contribute significantly to the human disease burden in both Africa and the Americas, but little data exists for Asia. To date only two mammarenaviruses, the widely spread lymphocytic choriomeningitis virus and the recently described Wēnzhōu virus have been identified in this region, but the zoonotic impact in Asia remains unknown. Here we report the presence of...

Data from: Characterizing and comparing the seasonality of influenza-like illnesses and invasive pneumococcal diseases using seasonal waveforms

Matthieu Domenech De Cellès, Helene Arduin, Emmanuelle Varon, Cécile Souty, Pierre-Yves Boëlle, Daniel Lévy-Bruhl, Sylvie Van Der Werf, Jean-Claude Soulary, Didier Guillemot, Laurence Watier & Lulla Opatowski
The seasonalities of influenza-like illnesses (ILIs) and invasive pneumococcal diseases (IPDs) remain incompletely understood. Experimental evidence indicates that influenza-virus infection predisposes to pneumococcal disease, so that a correspondence in the seasonal patterns of ILIs and IPDs might exist at the population level. We developed a method to characterize seasonality by means of easily interpretable summary statistics of seasonal shape—or seasonal waveforms. Non-linear mixed-effects models were used to estimate those waveforms based on weekly case reports...

Data from: Kin discrimination and outer membrane exchange in Myxococcus xanthus: a comparative analysis among natural isolates

Sébastien Wielgoss, Francesca Fiegna, Olaya Rendueles, Yuen-Tsu N. Yu & Gregory J. Velicer
Genetically similar cells of the soil bacterium Myxococcus xanthus cooperate at multiple social behaviours, including motility and multicellular development. Another social interaction in this species is outer-membrane exchange (OME), a behaviour of unknown primary benefit in which cells displaying closely related variants of the outer-membrane protein TraA transiently fuse and exchange membrane contents. Functionally incompatible TraA variants do not mediate OME, which led to the proposal that TraA incompatibilities determine patterns of intercellular cooperation in...

Rapid emergence of extensively drug-resistant Shigella sonnei in France

Sophie Lefèvre, Elisabeth Njamkepo, Corinne Ruckly, Isabelle Carle, Monique Lejay-Collin, Laëtitia Fabre, Maria Pardos de la Gandara & Francois-Xavier Weill
This study reports the monitoring of antimicrobial susceptibility of 7,121 Shigella sonnei isolates collected in France between 2005 and 2021. We detected a dramatic increase in the proportion of isolates simultaneously resistant to ciprofloxacin (CIP), third-generation cephalosporins (3GCs) and azithromycin (AZM) from 2015. In order to study the increase of XDR S. sonnei in France, a total of 3,140 S. sonnei isolates from the whole collection were sequenced, including all 164 XDR isolate. This rapid...

Data from: Patterns of selection on Plasmodium falciparum erythrocyte binding antigens after the colonisation of the New World

Erhan Yalcindag, Virginie Rougeron, Eric Elguero, Céline Arnathau, Patrick Durand, Sylvain Brisse, Laure Diancourt, Agnes Aubouy, Pierre Becquart, Umberto D'Alessandro, Didier Fontenille, Dionicia Gamboa, Amanda Maestre, Didier Ménard, Lise Musset, Oscar Noya, Vincent Veron, Albina Wide, Bernard Carme, Eric Legrand, Christine Chevillon, Francisco J. Ayala, François Renaud & Franck Prugnolle
Pathogens, which have recently colonized a new host species or new populations of the same host, are interesting models for understanding how populations may evolve in response to novel environments. During its colonization of South America from Africa Plasmodium falciparum, the main agent of malaria, has been exposed to new conditions in distinctive new human populations (Amerindian and populations of mixed origins), that likely exerted new selective pressures on the parasite's genome. Among the genes...

Data from: Comparative genomics of the dairy isolate Streptococcus macedonicus ACA-DC 198 against related members of the Streptococcus bovis/Streptococcus equinus complex

Konstantinos Papadimitriou, Rania Anastasiou, Eleni Mavrogonatou, Jochen Blom, Nikos C. Papandreou, Stavros J. Hamodrakas, Stéphanie Ferreira, Pierre Renault, Philip Supply, Bruno Pot & Effie Tsakalidou
Background: Within the genus Streptococcus, only Streptococcus thermophilus is used as a starter culture in food fermentations. Streptococcus macedonicus though, which belongs to the Streptococcus bovis/Streptococcus equinus complex (SBSEC), is also frequently isolated from fermented foods mainly of dairy origin. Members of the SBSEC have been implicated in human endocarditis and colon cancer. Here we compare the genome sequence of the dairy isolate S. macedonicus ACA-DC 198 to the other SBSEC genomes in order to...

Data from: Signals from the brain and olfactory epithelium control shaping of the mammalian nasal capsule cartilage

Marketa Kaucka, Julian Petersen, Marketa Tesarova, Bara Szarowska, Maria Eleni Kastriti, Meng Xie, Anna Kicheva, Karl Annusver, Maria Kasper, Orsolya Symmons, Leslie Pan, Francois Spitz, Jozef Kaiser, Maria Hovorakova, Tomas Zikmund, Kazunori Sunadome, Michael P. Matise, Hui Wang, Ulrika Marklund, Hind Abdo, Patrik Ernfors, Pascal Maire, Maud Wurmser, Andrei S. Chagin, Kaj Fried … & Igor Adameyko
Facial shape is the basis for facial recognition and categorization. Facial features reflect the underlying geometry of the skeletal structures. Here we reveal that cartilaginous nasal capsule (corresponding to upper jaw and face) is shaped by signals generated by neural structures: brain and olfactory epithelium. Brain-derived Sonic Hedgehog (SHH) enables the induction of nasal septum and posterior nasal capsule, whereas the formation of a capsule roof is controlled by signals from the olfactory epithelium. Unexpectedly,...

Data from: Long-term persistence of monotypic dengue transmission in small size isolated populations, French Polynesia, 1978-2014

Yoann Teissier, Richard Paul, Maite Aubry, Xavier Rodo, Carlos Dommar, Henrik Salje, Anavaj Sakuntabhai, Bernard Cazelles & Van-Mai Cao-Lormeau
Understanding the transition of epidemic to endemic dengue transmission remains a challenge in regions where serotypes co-circulate and there is extensive human mobility. French Polynesia, an isolated group of 72 inhabited islands, distributed among five geographically separated subdivisions, has recorded mono-serotype epidemics since 1944, with long inter-epidemic periods of circulation. Laboratory confirmed cases have been recorded since 1978, enabling exploration of dengue epidemiology under monotypic conditions in an isolated, spatially structured geographical location. A database...

Phylogenetic analysis of HIV-1 shows frequent cross-country transmission and local population expansions

Marc Bennedbæk, Anna Zhukova, Man-Hung Eric Tang, Jaclyn Bennet, Paula Munderi, Kiat Ruxrungtham, Magnus Gisslen, Michael Worobey, Jens D Lundgren & Rasmus L Marvig
Understanding of pandemics depends on characterization of pathogen collections from well-defined and demographically diverse cohorts. Since its emergence in Congo almost a century ago, HIV-1 has geographically spread and genetically diversified into distinct viral subtypes. Phylogenetic analysis can be used to reconstruct the ancestry of the virus to inform on the origin and distribution of subtypes. We sequenced two 3.6 kb amplicons of HIV-1 genomes from 3,197 participants in a clinical trial with consistent and...

scRNAseq datasets of cranial myogenic progenitors using Mesp1 and Myf5 lineages

Alexandre Grimaldi, Glenda Comai, Sébastien Mella & Shahragim Tajbakhsh
How distinct cell fates are manifested by direct lineage ancestry from bipotent progenitors, or by specification of individual cell types is a key question for understanding the emergence of tissues. The interplay between skeletal muscle progenitors and associated connective tissue cells provides a model for examining how muscle functional units are established. Most craniofacial structures originate from the vertebrate-specific neural crest cells except in the dorsal portion of the head, where they arise from cranial...

Data from: Evolution and diversity of the Microviridae viral family through a collection of 81 new complete genomes assembled from virome reads.

Simon Roux, Mart Krupovic, Axel Poulet, François Enault & Didier Debroas
Recent studies suggest that members of the Microviridae (a family of ssDNA bacteriophages) might play an important role in a broad spectrum of environments, as they were found dominant among the viral fraction from seawater and human gut samples. 24 completely sequenced Microviridae have been described so far, divided into three distinct groups named Microvirus, Gokushovirinae and Alpavirinae, this last group being only composed of prophages. In this study, we present the analysis of 81...

Data from: Testing for independence between evolutionary processes

Abdelkader Behdenna, Joël Pothier, Sophie S. Abby, Amaury Lambert & Guillaume Achaz
Evolutionary events co-occurring along phylogenetic trees usually point to complex adaptive phenomena, sometimes implicating epistasis. While a number of methods have been developed to account for co-occurrence of events on the same internal or external branch of an evolutionary tree, there is a need to account for the larger diversity of possible relative positions of events in a tree. Here we propose a method to quantify to what extent two or more evolutionary events are...

Data from: A comparison between transcriptome sequencing and 16S metagenomics for detection of bacterial pathogens in wildlife

Maria Razzauti, Maxime Galan, Maria Bernard, Sarah Maman, Christophe Klopp, Nathalie Charbonnel, Muriel Vayssier-Taussat, Marc Eloit & Jean-François Cosson
Background: Rodents are major reservoirs of pathogens responsible for numerous zoonotic diseases in humans and livestock. Assessing their microbial diversity at both the individual and population level is crucial for monitoring endemic infections and revealing microbial association patterns within reservoirs. Recently, NGS approaches have been employed to characterize microbial communities of different ecosystems. Yet, their relative efficacy has not been assessed. Here, we compared two NGS approaches, RNA-Sequencing (RNA-Seq) and 16S-metagenomics, assessing their ability to...

Data from: Screening test for neutralizing antibodies against yellow fever virus, based on a flavivirus pseudotype

Séverine Mercier-Delarue, Christine Durier, Nathalie Colin De Verdière, Jean-Dominique Poveda, VIncent Meiffrédy, Maria Dolores Fernandez Garcia, Stephane Lastère, Raymond Césaire, Jean-Claude Manuggera, Jean-Michel Molina, Ali Amara & François Simon
Given the possibility of yellow fever virus reintroduction in epidemiologically receptive geographic areas, the risk of vaccine supply disruption is a serious issue. New strategies to reduce the doses of injected vaccines should be evaluated very carefully in terms of immunogenicity. The plaque reduction test for the determination of neutralizing antibodies (PRNT) is particularly time-consuming and requires the use of a confinement laboratory. We have developed a new test based on the use of a...

Class-A penicillin binding proteins do not contribute to cell shape but repair cell-wall defects

Sven Van Teeffelen, Antoine Vigouroux, Baptiste Cordier, Andrey Aristov, Laura Alvarez, Gizem Özbaykal, Thibault Chaze, Enno Rainer Oldewurtel, Mariette Matondo, Felipe Cava & David Bikard
Cell shape and cell-envelope integrity of bacteria are determined by the peptidoglycan cell wall. In rod-shaped Escherichia coli, two conserved sets of machinery are essential for cell-wall insertion in the cylindrical part of the cell: the Rod complex and the class-A penicillin-binding proteins (aPBPs). While the Rod complex governs rod-like cell shape, aPBP function is less well understood. aPBPs were previously hypothesized to either work in concert with the Rod complex or to independently repair...

Data from: Long-term outcome in neuroZika: when biological diagnosis matters

Annie Lannuzel, Jean-Louis Fergé, Quentin Lobjois, Aissatou Signate, Benoit Rozé, Benoit Tressières, Yoann Madec, Pascale Poullain, Cécile Herrmann, Fatiha Najioullah, Eavan McGovern, Anne-Charlotte Savidan, Ruddy Valentino, Sébastien Breurec, Raymond Césaire, Etienne Hirsch, Pierre-Marie Lledo, Guillaume Thiery, André Cabié, Françoise Lazarini & Emmanuel Roze
Objectives: To characterize the full spectrum, relative frequency and prognosis of the neurological manifestations in Zika virus (ZIKV) postnatal infection. Methods: We conducted an observational study in consecutive ZIKV-infected patients presenting with neurological manifestations during the French West Indies 2016 outbreak. Results: Eighty-seven patients, including 6 children, were enrolled. Ninety-five percent of all cases required hospitalization. Guillain-Barré syndrome was the most frequent manifestation (46.0%) followed by encephalitis or encephalomyelitis (20.7%), isolated single or multiple cranial...

Redox controls RecA protein activity via reversible oxidation of its methionine residues

Benjamin Ezraty, Camille Henry, Frederic Barras, Laurent Loiseau, Alexandra Vergnes, Didier Vertommen, Angela Mérida-Floriano, Sindhu Chitteni-Pattu, Elizabeth Anne Wood, Josep Casadesús & Michael M. Cox
Reactive oxygen species (ROS) cause damage to DNA and proteins. The RecA protein plays a central role in the bacterial response to DNA damage. Here we report that RecA itself is also targeted by ROS. In vivo consequences of RecA oxidation include defects in SOS induction, DNA repair efficiency, and P1 transduction. In vitro, oxidized RecA fails to display ATPase activity, DNA strand exchange capacity and formation of nucleofilaments. Consistently, mass spectrometry analysis of oxidized...

Nutrient conditions are primary drivers of bacterial capsule maintenance in Klebsiella

Olaya Rendueles, Amandine Buffet & Eduardo P.C. Rocha
The fitness cost associated with the production of bacterial capsules is considered to be offset by the protection provided by these extracellular structures against biotic aggressions or abiotic stress. Yet, it is unknown if the capsule contributes to fitness in the absence of these. Here, we explored conditions favouring the maintenance of the capsule inKlebsiella pneumoniae, where the capsule is known to be a major virulence factor. Using short term experimental evolution on different Klebsiellastrains,...

Mosquito-bacteria interactions during larval development trigger metabolic changes with carry-over effects on adult fitness

Louis Lambrechts, Emilie Giraud, Hugo Varet, Rachel Legendre, Odile Sismeiro, Fabien Aubry, Stéphanie Dabo, Laura Dickson & Claire Valiente Moro
In animals with distinct life stages such as holometabolous insects, adult phenotypic variation is often shaped by the environment of immature stages, including their interactions with microbes colonizing larval habitats. Such carry-over effects were previously observed for several adult traits of the mosquito Aedes aegypti after larval exposure to different bacteria, but the mechanistic underpinnings are unknown. Here, we investigated the molecular changes triggered by gnotobiotic larval exposure to different bacteria in Ae. aegypti. We...

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