1. Spatial and temporal modelling of zoonotic mosquito-borne diseases

I combine serological data and case reporting data with models accounting for the spatial and temporal heterogeneity of mosquito-borne diseases. I have worked on West Nile virus and Rift Valley Fever virus, at multiple scales, in European and island settings.

2026 (preprint): Bastard J, Assaad C, Marti R, Tran A, Métras R* , Durand B* . Short- and long-term causes of West Nile virus risk in Europe: a spatiotemporal model accounting for under-reporting. medRxiv.

2026: Bastard J, Migné C, Helle T, Agneray E, Bigeard C, Boudjadi Y, Chevrier M, Dumarest M, Gondard M, Martin-Latil S, Mathews-Martin L, Petit T, Charpentier T, Pouillevet H, Durand B* , Métras R* , Gonzalez G* . Modelling serological cross-reactivity to disentangle the dynamics of West Nile and Usutu viruses in an emerging area. Epidemics.

2026: Bastard J, Métras R, Durand B. Mapping the bird risk index for West Nile virus in Europe and its relationship with disease occurrence in humans. Epidemiology and Infection.

2025: Hamouche C, Pradel P, Pagès N, Chevalier V, Lecollinet S, Bastard J* , Benoit Durand* . Reconstructing the silent circulation of West Nile Virus in a Caribbean island during 15 years using sentinel serological data. PLOS Neglected Tropical Diseases.

(* These authors contributed equally.)

2025: Ramaroson HS, Garchitorena A, Lacoste V, Andriamandimby SF, Schoenhals M, Bastard J, Albrechtova K, Chevalier L, Rakotomanana D, de Valois Rasamoel P, Raliniaina M, Andriamahefa HF, Andriamananjara MA, Rasoloharimanana LT, Razafimahatratra SL, Ratsimbasoa CA, Durand B, Chevalier V. A Multi-Host Approach to Quantitatively Assess the Role of Dogs as Sentinels for Rift Valley Fever Virus (RVFV) Surveillance in Madagascar. Viruses.

2022: Bastard J, Durand GA, Parenton F, Hassani Y, Dommergues L, Paireau J, Hozé N, Ruello M, Grard G, Métras R, Noël H. Reconstructing Mayotte 2018–19 Rift Valley Fever outbreak in humans by combining serological and surveillance data. Communications Medicine.


2. Eco-epidemiology of zoonotic tick-borne diseases

Zoonotic tick-borne diseases, such as Lyme disease, are characterized by the high complexity of their eco-epidemiological cycle, involving multiple hosts with various levels of competence and multiple tick life stages. I address this issue using quantitative modelling frameworks applied to data collected in North America.

2024: Bastard J* , Gregory N* , Fernandez P, Mincone M, Card O, VanAcker M, Kross S, Diuk‐Wasser M. Cascading effects of mammal host community composition on tick vector occurrence at the urban human–wildlife interface. Ecosphere.

2024: Ruiz-Carrascal D, Bastard J, Williams S, Diuk-Wasser M. Modeling platform to assess the effectiveness of single and integrated Ixodes scapularis tick control methods. Parasites and Vectors.


3. Surveillance and modelling for outbreak response

Infectious disease outbreaks with pandemic potential require adequate monitoring measures and timely quantitative analyses to inform public health policies. I have worked on SARS-CoV-2 and influenza in France, and on a cruise ship Andes virus outbreak.

2026: Bastard J, Métras R, Boëlle PY. Probabilistic assessment of transmission risk in a cruise ship hantavirus outbreak. Journal of Travel Medicine.

2024: Abad L, Antona D, Roudier C, Auvigne V, Bastard J, Blondel C, Durand J, Fayad M, Forgeot C, Figoni J, Mailles A, Moisan F, Spaccaferri G, Che D, Levy-Bruhl D, Hulin M. Keeping schools open during the emergence of the COVID-19 alpha variant: Impact on the circulation of SARS-CoV-2 among children during the 2020–2021 school year. Archives de Pédiatrie.

2023: Smith DRM, Jijón S, Oodally A, Shirreff G, Aït Bouziad K, Ante-Testard PA, Bastard J, Bouziri H, Daouda OS, Duchemin T, Godon-Rensonnet AS, Henriot P, Houri Y, Neynaud H, Perozziello A, Thonon F, Crépey P, Dab W, Jean K, Temime L. Sick leave due to COVID-19 during the first pandemic wave in France, 2020. Occupational & Environmental Medicine.

2022: Bastard J, Taisne B, Figoni J, Mailles A, Durand J, Fayad M, Josset L, Maisa A, van der Werf S, Parent du Châtelet I, Bernard-Stoecklin S. Impact of the Omicron variant on SARS-CoV-2 reinfections in France, March 2021 to February 2022. Eurosurveillance.

2021: Duchemin T, Bastard J, Ante-Testard PA, Assab R, Daouda OS, Duval A, Garsi JP, Lounissi R, Nekkab N, Neynaud H, Smith DRM, Dab W, Jean K, Temime L, Hocine MN. Monitoring sick leave data for early detection of influenza outbreaks. BMC Infectious Diseases.


4. Modelling the spread of antibiotic resistance in farm animals

Antibiotic resistance in bacteria is a major public health threat, and transmission of resistant strains is possible between human and animal (including livestock) populations. During my PhD, I modelled the spread of antibiotic resistant bacteria in farm animals at multiple scales in France and in Vietnam, focusing particularly on methicillin resistant Staphylococcus aureus, on ESBL-producing Escherichia coli and on colistin resistance in E. coli.

2022: Bastard J, Nhung NT, Hien VB, Kiet BT, Temime L, Opatowski L, Carrique-Mas J, Choisy M. Modelling the impact of antimicrobial use and external introductions on commensal E. coli colistin resistance in small-scale chicken farms of the Mekong delta of Vietnam. Transboundary and Emerging Diseases.

2021: Bastard J, Haenni M, Gay E, Glaser P, Madec JY, Temime L, Opatowski L. Drivers of ESBL-producing Escherichia coli dynamics in calf fattening farms: A modelling study. One Health.

2020: Bastard J, Andraud M, Chauvin C, Glaser P, Opatowski L, Temime L. Dynamics of livestock-associated methicillin resistant Staphylococcus aureus in pig movement networks: Insight from mathematical modeling and French data. Epidemics.