Amélie Desvars

Amélie Desvars
University of Veterinary Medicine, Vienna | vetmed · Abteilung für Öffentliches Veterinärwesen und Epidemiologie

DVM, PhD

About

67
Publications
16,606
Reads
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2,043
Citations
Citations since 2017
38 Research Items
1748 Citations
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20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
Additional affiliations
December 2015 - present
University of Veterinary Medicine, Vienna
Position
  • PostDoc Position
August 2013 - August 2015
Umeå University
Position
  • PostDoc Position

Publications

Publications (67)
Preprint
Full-text available
Animal movements represent a major risk for the spread of infectious diseases in the domestic swine population. In this study, we adopted methods from social network analysis to explore pig trades in Austria. We used a dataset of daily records of swine movements covering the period 2015-2021. We analyzed the topology of the network and its structur...
Article
Full-text available
In response to COVID-19, governments worldwide are implementing public health and social measures (PHSM) that substantially impact many areas beyond public health. The new field of PHSM data science collects, structures, and disseminates data on PHSM; here, we report the main achievements, challenges, and focus areas of this novel field of research...
Article
Full-text available
Measurement(s) SARS-CoV-2 event in animal hosts Technology Type(s) Manual data collection from text sources Factor Type(s) ID • primary_source • archive_event_number • link_web • secondary_source • secondary_source_ID • secondary_source_web • host_com_orig • host_sci_orig • host_com_res • host_sci_res • host_colloq • host_sci_spec_res • family • ep...
Article
Full-text available
Urban environments represent unique ecosystems where dense human populations may come into contact with wildlife species, some of which are established or potential reservoirs for zoonotic pathogens that cause human diseases. Finding practical ways to monitor the presence and/or abundance of zoonotic pathogens is important to estimate the risk of s...
Article
Full-text available
Stringent COVID-19 public health and social measures (PHSMs) have challenged the work of animal health professionals, especially in the early phase of the pandemic. We aimed to qualitatively describe how COVID-19 PHSMs have affected the surveillance and control of African swine fever (ASF) in Europe, assess how professionals engaged in these activi...
Preprint
Full-text available
The zoonotic origin of SARS-CoV-2, the etiological agent of COVID-19, is not yet fully resolved. Although natural infections in animals are reported in a wide range of species, large knowledge and data gaps remain regarding SARS-CoV-2 animal hosts. We used two major health databases to extract unstructured data and generated a comprehensive global...
Article
Full-text available
Cryptosporidium and Giardia are waterborne protozoa that cause intestinal infections in a wide range of warm-blooded animals. Human infections vary from asymptomatic to life-threatening in immunocompromised people, and can cause growth retardation in children. The aim of our study was to assess the prevalence and diversity of Cryptosporidium and Gi...
Article
Anticoagulant rodenticides (AR) resistance has been defined as “a major loss of efficacy due to the presence of a strain of rodent with a heritable and commensurately reduced sensitivity to the anticoagulant”. The mechanism that supports this resistance has been identified as based on mutations in the Vkorc1 gene leading to severe resistance in rat...
Article
Full-text available
Assessing the effectiveness of non-pharmaceutical interventions (NPIs) to mitigate the spread of SARS-CoV-2 is critical to inform future preparedness response plans. Here we quantify the impact of 6,068 hierarchically coded NPIs implemented in 79 territories on the effective reproduction number, Rt, of COVID-19. We propose a modelling approach that...
Article
Full-text available
Across the distribution of the Caspian whipsnake (Dolichophis caspius), populations have become increasingly disconnected due to habitat alteration. To understand population dynamics and this widespread but locally endangered snake’s adaptive potential, we investigated population structure, admixture, and effective migration patterns. We took a lan...
Article
Full-text available
In response to the COVID-19 pandemic, governments have implemented a wide range of non-pharmaceutical interventions (NPIs). Monitoring and documenting government strategies during the COVID-19 crisis is crucial to understand the progression of the epidemic. Following a content analysis strategy of existing public information sources, we developed a...
Article
Full-text available
Leptospirosis is a worldwide bacterial zoonosis which incidence is expected to increase in conjunction with global change. In urban ecosystems, synanthropic rats are the key source of Leptospira infection in humans and other animals. Risk assessment and prediction of human leptospirosis require investigations of the environment associated with the...
Article
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Although black (Rattus rattus) and brown (Rattus norvegicus) rats are among the most widespread synanthropic wild rodents, there is a surprising scarcity of knowledge about their ecology in the urban ecosystem. In particular, relatively few studies have investigated their helminth species diversity in such habitat. We followed the PRISMA (Preferred...
Preprint
Full-text available
Non-pharmaceutical interventions (NPIs) to mitigate the spread of SARS-CoV-2 were often implemented under considerable uncertainty and a lack of scientific evidence. Assessing the effectiveness of the individual interventions is critical to inform future preparedness response plans. Here we quantify the impact of 4,579 NPIs implemented in 76 territ...
Preprint
Full-text available
The goal of this analysis is to estimate the effects of the diverse government intervention measures implemented to mitigate the spread of the Covid-19 epidemic. We use a process model based on a compartmental epidemiological framework Susceptible-Infected-Recovered-Dead (SIRD). Analysis of case data with such a mechanism-based model has advantages...
Preprint
Full-text available
In response to the COVID-19 pandemic, governments have implemented a wide range of nonpharmaceutical interventions (NPIs). Monitoring and documenting government strategies during the COVID-19 crisis is crucial to understand the progression of the epidemic. Following a content analysis strategy of existing public information sources, we developed a...
Article
Full-text available
Background Brown rats (Rattus norvegicus) are an important wildlife species in cities, where they live in close proximity to humans. However, few studies have investigated their role as reservoir of antimicrobial-resistant bacteria.AimWe intended to determine whether urban rats at two highly frequented sites in Vienna, Austria, carry extended-spect...
Article
Full-text available
Brown rats are a prolific synanthropic pest species, but attempts to control their populations have had limited success. Rat population dynamics, dispersal patterns, and resistance to rodenticides are important parameters to consider when planning a control programme. We used population genetics and genotyping to investigate how these parameters va...
Article
The presence of the methicillin resistance gene mecC in coagulase-negative Staphylococcus spp. (CoNS) is scarce. The aim of this study was to characterize mecC-positive CoNS isolated from various wild and domestic animals. The presence of the mecC gene was screened in 4299 samples from wild animals and domestic animals. Fifteen coagulase-negative s...
Article
Full-text available
Nowadays, the majority of human beings live in urban ecosystems, with this proportion expected to continue increasing in the future. With the growing importance of urban rat-associated issues (e.g. damages to urban infrastructures, costs of rat-control programs, rat-associated health risks), it is becoming indispensable to fill the identified gaps...
Article
Full-text available
Brown rats are one of the most widespread urban species worldwide. Despite the nuisances they induce and their potential role as a zoonotic reservoir, knowledge on urban rat populations remains scarce. The main purpose of this study was to characterize an urban brown rat population from Chanteraines park (Hauts-de-Seine, France), with regards to ha...
Data
Setting and results of the trapping sessions, 10–21 January 2011, on sites 1 and 2 in Chanteraines park (Hauts-de-Seine, France). (PDF)
Data
Model 2 results. Adjusted odds ratios and 95% confidence intervals for pathogen occurrence in R. norvegicus from Chanteraines park calculated using the best-fitted general linear model identified using a stepwise backward selection on the Akaike Information Criterion. (PDF)
Data
Summary of the results per site and sex. Median and range (minimum–maximum) are given for the quantitative data, number and percentage for the qualitative data. One animal on site 1 was not sexed, weight data were missing for two females and two males on site 1, which therefore could not have been categorized as young or adult. (PDF)
Data
Results of the correspondence analysis (implemented in the Genetix software) of the brown rat population structure in Chanteraines (correspondence analysis was adapted to individual diploid genotypes). Individuals from site 1 are in black, red signs represent individuals from site 2. Identification names of the four individuals outside the main sca...
Data
Structure Harvester output. Plot of mean likelihood L(K) and variance per K value from Structure (86 individuals genotyped for 13 polymorphic microsatellite loci). (PDF)
Data
Flow chart illustrating the samples taken on the trapped brown rats, the storing processes and subsequent analyses for each sample. (TIF)
Data
Results of the microsatellite genotyping. (XLSX)
Article
Sweden reports large and variable numbers of human tularemia cases, but the high-risk regions are anecdotally defined and factors explaining annual variations are poorly understood. Here, high-risk regions were identified by spatial cluster analysis on disease surveillance data for 1984–2012. Negative binomial regression with five previously valida...
Article
Hantaviruses are emerging zoonotic viruses that cause human diseases. In this study, sera from 642 mammals from La Réunion and Mayotte islands (Indian Ocean) were screened for the presence of hantaviruses by molecular analysis. None of the mammals from La Réunion island was positive, but hantavirus genomic RNA was discovered in 29/160 (18 %) Rattus...
Article
Full-text available
Understanding the demographic history and genetic make-up of colonizing species is critical for inferring population sources and colonization routes. This is of main interest for designing accurate control measures in areas newly colonized by vector species of economically important pathogens. The biting midge Culicoides imicola is a major vector o...
Article
Full-text available
Leptospirosis is a worldwide zoonosis that is endemic in tropical areas, such as Reunion Island. The species Leptospira interrogans is the primary agent in human infections, but other pathogenic species, such as L. kirschner and L. borgpetersenii, are also associated with human leptospirosis. In this study, a melting curve analysis of the products...
Article
Full-text available
The zoonotic disease tularemia is endemic in large areas of the Northern Hemisphere, but research is lacking on patterns of spatial distribution and connections with ecologic factors. To describe the spatial epidemiology of and identify ecologic risk factors for tularemia incidence in Sweden, we analyzed surveillance data collected over 29 years (1...
Data
Geographic coordinates and quality coding of locations of tularemia disease exposure and disease onset dates, Sweden, 1984–2011.
Article
Full-text available
The role of terrestrial vertebrates in the epidemiology of chikungunya disease is poorly understood. We evaluated their exposure and amplification role during the 2006 chikungunya outbreak in the Indian Ocean. Blood samples were collected from 18 mammalian and reptile species from Reunion Island, Mauritius and Mayotte. Among the 1051 samples serolo...
Article
Full-text available
In the past decade, leptospirosis has emerged as a major zoonosis with a worldwide distribution. The disease is caused by bacteria of the genus Leptospira. The western Indian Ocean includes more than one hundred tropical or subequatorial islands where leptospirosis constitutes a major public health problem. The clinical signs of the human disease a...
Article
Full-text available
Leptospirosis is the major infectious disease on Reunion Island but little is known about the animal reservoir. We conducted a wide-ranging survey that included samples from 574 animals belonging to 12 species. The seroprevalence and prevalence of renal carriage varied greatly depending on the species, with the highest seroprevalence (79·5%) found...
Article
Full-text available
In 2009, a survey was conducted in Reunion Island to determine the renal leptospiral load in black rats trapped in the field. The concentration of leptospires in kidney tissue was calculated using qPCR. Our results showed high inter-individual variations of renal bacterial load in naturally infected black rats (mean=8.27±4.72 log-genome copies per...
Article
Full-text available
Our objective was to identify local animal reservoirs of leptospirosis to explain the unusual features of Leptospira strains recently described among patients on the island of Mayotte. By means of a microscopic agglutination test using local clinical isolates, we found that 11.2% of black rats were seropositive to Leptospira, whereas 10.2% of flyin...
Article
Full-text available
In the last decade, leptospirosis has emerged as a globally important infectious disease. Humans most commonly become infected through occupational, recreational, or domestic contact with the urine of carrier animals, either directly or through contaminated water or soil. The disease occurs in urban areas of industrialized and developing countries...
Data
Leptospirosis and temperature in Reunion Island. Monthly cases of leptospirosis (black curve) and average temperature (dotted curve). Beaufonds-Miria station, Saint-Benoît. 1 January 1998 to 31 December 2008. (TIFF)
Data
Leptospirosis and global solar radiation in Reunion Island. Monthly cases of leptospirosis (black curve) and global solar radiation (dotted curve). Beaufonds-Miria station, Saint-Benoît. 1 January 1998 to 31 December 2008. (TIFF)
Article
Full-text available
Leptospirosis is a disease which occurs worldwide but particularly affects tropical areas. Transmission of the disease is dependent on its excretion by reservoir animals and the presence of moist environment which allows the survival of the bacteria. A retrospective study was undertaken to describe seasonal patterns of human leptospirosis cases rep...
Article
Full-text available
Leptospirosis is the most widespread zoonosis in the world. Humans become infected through contact with the urine of carrier animals, directly or via contaminated environments. This review reports available data on animal leptospirosis in ten tropical islands: Barbados, Martinique, Guadeloupe, Grenada, Trinidad, New Caledonia, Hawaii, French Polyne...
Article
Comparative Epidemiology of Orbiviruses in Guadeloupe (French West Indies) and Reunion Island( Indian Ocean). Guadeloupe and Reunion are two French overseas territories where Bluetongue is enzootic. Since 2010, it has been demonstrated that another arbovirus transmitted by Culicoides, Epizootic haemorrhagic disease of deer, is also present in these...
Article
Full-text available
Chikungunya virus (CHIKV) has long been considered to be transmitted to humans by the human-biting mosquito Aedes aegypti, especially in Africa. However, the recent outbreak of CHIKV involved another vector, Aedes albopictus, and serological data in the literature suggest that several species of domestic or human-related vertebrates can be contamin...
Article
Full-text available
Pteropus seychellensis comorensis is the only Pteropodidae bat species on the island of Mayotte (Comoros Archipelago), and most aspects of its biology are unknown. In order to catch this large bat, we used a simple and low-cost method, consisting of raised mist nets that were set close to foraging sites. Major factors driving catch success were hig...
Article
Full-text available
In order to know if the Tailless tenrec (Tenrec ecaudatus), endemic insectivorous mammal of Madagascar and present only on Indian Ocean islands, is a natural maintenance host of leptospires carrier in La Reunion, we conducted a research of anti-leptospire antibodies by microagglutination test in 37 individuals. 81.1% of serums tested were positive,...
Article
La gale psoroptique est une des plus vieilles maladies des ovins. Cosmopolite, l'agent étiologique est un acarien : Psoroptes ovis. Actuellement, le diagnostic repose sur l'observation des signes cliniques et la recherche des parasites au niveau des lésions. Les réactions immunitaires du mouton ont été très étudiées. Si la chronologie exacte des év...

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Project (1)
Project
To investigate the epidemiology of some specific zoonotic disease agents in Vienna and identify environmental factors driving pathogen dynamics within the rat population.