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Postdoctoral research opportunity: Genetic and non-genetic determinants of cross-species transmission of
il y a 3 semaines
Informations générales
Organisme de rattachement
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE)
Référence
Date de début de diffusion
/12/2025
Date de parution
/01/2026
Intitulé long de l'offre
Postdoctoral research opportunity: Genetic and non-genetic determinants of cross-species transmission of highly pathogenic avian influenza viruses using phylodynamics
Date limite de candidature
28/02/2026
Employeur
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE)
Versant
Fonction Publique de l'Etat
Catégorie
Catégorie A (cadre)
Nature de l'emploi
Emploi ouvert uniquement aux contractuels
Domaine / Métier
Recherche - Chercheuse / Chercheur
Statut du poste
Vacant
Intitulé du poste
Postdoctoral research opportunity: Genetic and non-genetic determinants of cross-species transmission of
Descriptif du service
Environment and research group
The postdoctoral researcher will be affiliated to the mixed research unit Host-Pathogens Interactions (IHAP unit, epidesa group) at INRAE-ENVT located in Toulouse, France. The unit combines expertise in virology, epidemiology, phylodynamics and modelling for decision-making in animal health. The research project is part of the ZOOFLU project (ANR-23-PEPZ-0005 ZOOFLU, consortium INRAE, ANSES, CNRS-INSERM) funded by PEPR PREZODE and MIE, and focuses on the emergence mechanisms of zoonotic avian influenza viruses at the wildlife-domestic-human interface. It will offer excellent opportunities to advance career through participation at international conferences, collaboration with leading research groups in avian influenza surveillance, transmission and evolution, opportunities to co-supervise students and access to high-performance computing cluster.
Supervisors
The postdoc will be supervised by Claire Guinat (INRAE) and Mariette Ducatez (INRAE) who have a strong background on avian influenza viruses evolution and transmission. The position includes close collaboration with ETH Zurich (Computational Evolution group, Tanja Stadler) and North Carolina State University (Phylodynamics group, David Rasmussen), with potential short visits planned.
Research location
The postdoctoral researcher will located on the National Veterinary School of Toulouse, in Toulouse, France.
Description du poste
Research context
Highly pathogenic avian influenza (HPAI) viruses have emerged as a serious global threat to animal and public health. Since 2020, these viruses have exhibited unprecedented spread, crossing geographical boundaries and affecting a wide range of species, including poultry, wildlife and humans1. These viruses evolve rapidly, accumulating mutations that may facilitate adaptation to new species or increase the likelihood of transmissibility between species. Understanding how viral evolution shapes cross-species transmission is critical for predicting and preventing zoonotic emergence. Most knowledge about genetic mutations that could enable host shifts comes from laboratory experiments, where replication, virulence or shedding are measured under controlled conditions. While these studies are relevant in pinpointing candidate mutations, they do not necessarily capture the evolutionary dynamics that determine transmission success between hosts in field conditions. The capacity of a pathogen to expand is also scale-dependent: in lab conditions, it often relates to replication rates or competitive advantage (and commonly refered to as viral fitness), whereas at the population level, it is best defined by the virus's ability to transmit between hosts. Increased replication in cell culture, for example, does not always translate into higher transmission between hosts in real-world settings. Recently, phylodynamic tools have been developed to quantify the transmission potential of viral lineages directly from surveillance data. By analyzing the branching patterns of time-scaled phylogenies, these methods estimate transmission potential, with more fit lineages producing more frequent branching and more sampled descendants. When combined with metadata, they can also disentangle the contributions of genetic and environmental factors to transmission potential, while accounting for confounders such as lineage structure and spatial heterogeneity.
Research objectives
This project aims to study the genetic and non-genetic determinants of cross-species transmission of HPAI viruses using large-scale genomic and epidemiological datasets. The key questions are: Which viral mutations are associated with higher transmission between host species? How much of the observed variations in transmission can be explained by viral mutations compared with host, environmental or management factors (host species, production type, putative implementation of vaccination, or geographic context)? The postdoctoral researcher will first compile a set of candidate mutations identified in experimental studies. Using phylodynamic methods, the postdoctoral researcher will infer lineage-specific fitness from dated phylogenies and examine whether lineages carrying particular mutations show consistently higher transmission potential within and between host species.
Descriptif du profil recherché
Academic qualifications and experience
Applicants should hold a PhD in molecular epidemiology, evolutionary biology, or a related field, with strong skills in bioinformatics. Prior experience with phylodynamic analyses and proficiency in programming are required (R, BEAST2, bash). The ability to work independently and to contribute analytical approaches is expected throughout the project. An interest in infectious diseases and animal health is desirable. Proficiency in written and spoken English is essential, including the ability to present research at international conferences. Proficiency in French is not necessarily required.
How to apply
Please submit your CV, two reference letters and a short motivation letter (max 1 page) where you state why you are interested and what experience you have to address the aspects of the project to Claire Guinat ) by Feb 28th 2026. Online interviews of shortlisted candidates will be held in March 2026.
Temps plein
Oui
Rémunération contractuels (en € brut/an)
Between 3,000 and 3,500€ gross
Informations complémentairesInformations complémentaires
Key references
Bellido-Martín, B. et al. Evolution, spread and impact of highly pathogenic H5 avian influenza A viruses. Nat. Rev. Microbiol. 1–
Handel, A. & Rohani, P. Crossing the scale from within-host infection dynamics to between-host transmission fitness: a discussion of current assumptions and knowledge. Philos. Trans. R. Soc. B Biol. Sci. 370,
Xue, K. S. & Bloom, J. D. Linking influenza virus evolution within and between human hosts. Virus Evol. 6, veaa
Rasmussen, D. A. & Stadler, T. Coupling adaptive molecular evolution to phylodynamics using fitness-dependent birth-death models. Elife 8, e
Kepler, L., Hamins-Puertolas, M. & Rasmussen, D. A. Decomposing the sources of SARS-CoV-2 fitness variation in the United States. Virus Evol. 7, veab
European Food Safety Authority (EFSA) et al. Drivers for a pandemic due to avian influenza and options for One Health mitigation measures. EFSA J. 22, e
Suttie, A. et al. Inventory of molecular markers affecting biological characteristics of avian influenza A viruses. Virus Genes 55, 739–
Localisation du poste
Europe, France, Occitanie, Haute Garonne (31)
Lieu d'affectation (sans géolocalisation)
23 chemin des capelle 31076 toulouse
Critères candidatNiveau d'études / Diplôme
Niveau 8 Doctorat/diplômes équivalents
Documents à transmettre
L'envoi du CV et d'une lettre de motivation est obligatoire
Date de vacance de l'emploi
01/04/2026
Mail à qui adresser les candidatures (bouton postuler)
Contact 1
