A5068877469- Pharmaceutical and Antibiotic Environmental Impacts
- Indoor Air Quality and Microbial Exposure
- Microbial Community Ecology and Physiology
- Air Quality Monitoring and Forecasting
- Pesticide and Herbicide Environmental Studies
- Atmospheric chemistry and aerosols
- Antibiotic Use and Resistance
- Freshwater macroinvertebrate diversity and ecology
- Enzyme-mediated dye degradation
- Isotope Analysis in Ecology
- Polar Research and Ecology
- Advanced Chemical Sensor Technologies
- Marine and coastal ecosystems
- Environmental Toxicology and Ecotoxicology
- Air Quality and Health Impacts
- Antibiotic Resistance in Bacteria
- Species Distribution and Climate Change
- Biocrusts and Microbial Ecology
- Odor and Emission Control Technologies
- Climate Change Communication and Perception
- Atmospheric and Environmental Gas Dynamics
- Vibrio bacteria research studies
- Geochemistry and Elemental Analysis
- Dysphagia Assessment and Management
- Pneumonia and Respiratory Infections
Université Laval
2022-2025
Institut Universitaire de Cardiologie et de Pneumologie de Québec
2022-2025
Institut de Chimie de Clermont-Ferrand
2020-2024
Centre Hospitalier Universitaire Amiens-Picardie
2024
Université Clermont Auvergne
2017-2023
Laboratoire Microorganismes Génome et Environnement
2016-2023
Centre National de la Recherche Scientifique
2016-2023
Lung Institute
2022-2023
Sigma Clermont
2021-2022
University of Zurich
1987
While the presence of condensed water in clouds could have influence on diversity bacteria circulating high atmosphere (multiplication or disruption specific taxa), aerosols and been poorly studied comparatively terms microbiological content. Here we investigated airborne bacterial during cloudy clear situations collected throughout year at a mountain site. Samples were using flow rate impingers to examine total cell DNA concentrations, as well by high-throughput sequencing. Overall very...
This study aimed to assess the potential impact of long-term chronic exposure (69 years) naturally-occurring radionuclides (RNs) and heavy metals on microbial communities in sediment from a stream flowing through watershed impacted by an ancient mining site (Rophin, France). Four samples were collected along radioactivity gradient (for 238U368 1710 Bq.Kg−1) characterized for presence bioavailable fractions (226Ra, 210Po), trace metal elements (Th, U, As, Pb, Cu, Zn, Fe). Results revealed...
Abstract. Airborne microorganisms can remain at altitude for several days, exposed to multiple environmental constraints that prevent or limit microbial activity, the most important of which is probably lack available liquid water. Clouds, i.e., air masses containing water, could offer more favorable conditions. In order investigate influence clouds on functioning airborne microorganisms, we captured aerosols in a nucleic acid preservation buffer from high-altitude mountain meteorological...
Highlights Fan exhaust air sampling is a reliable monitoring proxy for indoor bioaerosols from livestock operations. Air samples collected indoors and at fan have highly similar bacterial diversity. At low concentrations, specific microbial markers are still detectable in the exhaust. Abstract. The incidence of animal zoonotic diseases expected to increase coming years, imposing reinforcement biosecurity measures Airborne transmission certain infectious agents underscores importance...
Abstract. Eighteen free amino acids (FAAs) were quantified in cloud water sampled at the Puy de Dôme station (PUY – France) during 13 events. This quantification has been performed without concentration or derivatization, using liquid chromatography hyphened to mass spectrometry (LC-MS) and standard addition method correct for matrix effects. Total concentrations of FAAs (TCAAs) vary from 1.2 7.7 µM, Ser (serine) being most abundant AA (23.7 % on average) but with elevated deviation,...
ABSTRACT Bacteria circulate in the atmosphere, through clouds and precipitation to surface ecosystems. Here, we conducted a coordinated study of bacteria assemblages at two sites distant ∼800 m elevation rural vegetated area around puy de Dôme Mountain, France, analysed them regard meteorological, chemical air masses’ history data. In both precipitation, generally associated with vegetation or soil dominated. Elevated ATP-to-cell ratio compared suggested higher proportion viable cells and/or...
Global contamination of streams by a large variety compounds, such as nutrients and pesticides, may exert high pressure on aquatic organisms, including microbial communities their activity organic matter decomposition. In this study, we assessed the potential interaction between fungicide herbicide [tebuconazole (TBZ) S-metolachlor (S-Met), respectively] at realistic environmental concentrations structure (biomass, diversity) decomposition fungal bacterial (leaf decay rates, extracellular...
Nicosulfuron is a selective herbicide belonging to the sulfonylurea family, commonly applied on maize crops. Its worldwide use results in widespread presence as contaminant surface streams and ground-waters. In this study, we isolated, for first time, Plectosphaerella cucumerina AR1 nicosulfuron-degrading fungal strain, new record from Alnus leaf litter submerged freshwater. The degradation of nicosulfuron by P. was achieved co-metabolism process followed first-order model dissipation....
Highlights Building characteristics (ventilation and animal density) seem to have an important effect on air quality. Concentration in the seems be influenced by amounts bedding for certain quality indicators. Dust concentrations were below OSHA threshold, while some barns exceeded DECOS threshold endotoxins. This study gives new data into biological components of dairy (bacteria, molds, endotoxins, etc.) Free-stall or tie-stall housing may not linked with poorer Abstract. Alternative...
Manure spreading from farm animals can release antibiotic-resistant bacteria (ARB) carrying antimicrobial resistance genes (ARGs) into the air, posing a potential threat to human and animal health due intensive use of antibiotics in livestock industry. This study analyzed effect different manure types methods on airborne bacterial emissions antibiotic controlled setting. Cow, poultry manure, pig slurry were spread confined environment using two spreaders (splash plate dribble bar), resulting...
Antimicrobial resistance (AMR) is continuing to grow across the world. Though often thought of as a mostly public health issue, AMR also major agricultural and environmental problem. As such, many researchers refer it preeminent One Health issue. Aerial transport antimicrobial-resistant bacteria via bioaerosols still poorly understood. Recent work has highlighted presence antibiotic genes in bioaerosols. Emissions have been detected from various sources, including wastewater treatment...
Abstract. Airborne micro-organisms can remain at altitude for several days exposed to multiple environmental constraints that prevent or limit microbial activity, the most important of which is probably lack available liquid water. Clouds, i.e. air masses containing water, could offer more favorable conditions. In order investigate influence clouds on functioning airborne microorganisms, we captured aerosols into a nucleic acid preservation buffer from high-altitude mountain meteorological...
Abstract Studying airborne microorganisms is highly challenging due to ultra-low and spread biomass, great spatial temporal variabilities at short scales. Aeromicrobiology still an emerging discipline of environmental microbiology, some the basic practices (replication, control contaminants, etc ) are not yet widely adopted, which potentially limits conclusions. Here we aim evaluating benefits such in study aeromicrobiome using molecular-based approaches, recommend following: (i) sample high...
Abstract The decomposition of allochthonous plant litter is a key ecological process in forested streams, involving the lignolytic activities aquatic fungi. In this study we investigated relationship between water pollution (by mixture nutrients, metals and pesticides) biomass, structure enzyme leaf‐associated fungal communities. experiment was performed through microcosm approach by comparing communities from less‐polluted upstream site to more‐polluted downstream agricultural basin Auzon...
Abstract Bacteria cells and fungal spores can aerosolize remain suspended in the atmosphere for several days, exposed to water limitation, oxidation, lack of nutrients. Using comparative metagenomics/metatranscriptomics, we show that clouds are associated with activation numerous metabolic functions airborne microorganisms, including spore germination. The whole phenomenon mirrors rapid recovery microbial activity soils after rewetting by rain, known as “Birch effect”. Insufficient nutrient...