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Castel G, Alburkat H, Tatard C, Dutra L, Criado M, Bouilloud M, Pradel J, Sironen T, Charbonnel N. Puumala orthohantavirus circulation in its wild reservoir, the bank vole, during the 2021 outbreak of hemorrhagic fever with renal syndrome in Jura, France. Infect Dis Now 2023; 53:104767. [PMID: 37562571 DOI: 10.1016/j.idnow.2023.104767] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/12/2023]
Abstract
OBJECTIVE A large and unprecedented outbreak of an attenuated form of hemorrhagic fever with renal syndrome called nephropathia epidemica (NE) and caused by Puumala virus (PUUV) occurred in 2021 in the southern Jura Mountains (France) leading to numerous hospitalizations. The aim of this study was to investigate the circulation of PUUV in its animal reservoir at the time of this outbreak. METHODS We conjointly surveyed bank vole relative abundance, small mammal community composition, and PUUV circulation in bank voles (seroprevalence and genetic diversity) in the Jura NE epidemic area, between 2020 and 2022. RESULTS Trapping results showed a higher relative abundance of bank voles in 2021 compared to 2020 and 2022. Extremely high levels of PUUV seroprevalence in bank voles were found at the time of the human NE epidemic with seropositive animals trapped in almost all trap lines as of spring 2021. Genetic analyses of PUUV (S segment) gathered in 2021 at two sampling sites revealed a strong clustering of these strains within the "Jura" clade. No significant genetic variation was detected compared to what was already known to be circulating in the Jura region. CONCLUSION These results underline a need for enhanced monitoring of PUUV circulation in host reservoir populations in NE endemic areas. This would enable the relevant actors to better inform and sensitize the public on this zoonotic risk, and to implement prevention strategies in collaboration with physicians.
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Affiliation(s)
- Guillaume Castel
- CBGP, INRAE, CIRAD, IRD, Institut Agro, Université de Montpellier, France.
| | - Hussein Alburkat
- Department of Virology, Faculty of Medicine, University of Helsinki, Helsinki, Finland; Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
| | - Caroline Tatard
- CBGP, INRAE, CIRAD, IRD, Institut Agro, Université de Montpellier, France
| | - Lara Dutra
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
| | - Mathilde Criado
- CBGP, INRAE, CIRAD, IRD, Institut Agro, Université de Montpellier, France
| | - Marie Bouilloud
- CBGP, IRD, INRAE, CIRAD, Institut Agro, Université de Montpellier, France
| | - Julien Pradel
- CBGP, INRAE, CIRAD, IRD, Institut Agro, Université de Montpellier, France
| | - Tarja Sironen
- Department of Virology, Faculty of Medicine, University of Helsinki, Helsinki, Finland; Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
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Schlohsarczyk EK, Drewes S, Koteja P, Röhrs S, Ulrich RG, Teifke JP, Herden C. Tropism of Puumala orthohantavirus and Endoparasite Coinfection in the Bank Vole Reservoir. Viruses 2023; 15:v15030612. [PMID: 36992321 PMCID: PMC10058470 DOI: 10.3390/v15030612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/08/2023] [Accepted: 02/12/2023] [Indexed: 02/25/2023] Open
Abstract
In Europe, most cases of human hantavirus disease are caused by Puumala orthohantavirus (PUUV) transmitted by bank voles (Clethrionomys glareolus, syn. Myodes glareolus), in which PUUV causes inconspicuous infection. Little is known about tropism and endoparasite coinfections in PUUV-infected reservoir and spillover-infected rodents. Here, we characterized PUUV tropism, pathological changes and endoparasite coinfections. The voles and some non-reservoir rodents were examined histologically, immunohistochemically, by in situ hybridization, indirect IgG enzyme-linked immunosorbent assay and reverse transcription-polymerase chain reaction. PUUV RNA and anti-PUUV antibodies were detected simultaneously in a large proportion of the bank voles, indicating persistent infection. Although PUUV RNA was not detected in non-reservoir rodents, the detection of PUUV-reactive antibodies suggests virus contact. No specific gross and histological findings were detected in the infected bank voles. A broad organ tropism of PUUV was observed: kidney and stomach were most frequently infected. Remarkably, PUUV was detected in cells lacking the typical secretory capacity, which may contribute to the maintenance of virus persistence. PUUV-infected wild bank voles were found to be frequently coinfected with Hepatozoon spp. and Sarcocystis (Frenkelia) spp., possibly causing immune modulation that may influence susceptibility to PUUV infection or vice versa. The results are a prerequisite for a deeper understanding of virus–host interactions in natural hantavirus reservoirs.
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Affiliation(s)
- Elfi K. Schlohsarczyk
- Institute of Veterinary Pathology, FB10—Veterinary Medicine, Justus-Liebig-University Giessen, 35392 Giessen, Germany
- Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany
| | - Stephan Drewes
- Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany
| | - Paweł Koteja
- Institute of Environmental Sciences, Faculty of Biology, Jagiellonian University, 30-387 Kraków, Poland
| | - Susanne Röhrs
- Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany
| | - Rainer G. Ulrich
- Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany
| | - Jens P. Teifke
- Institute of Veterinary Pathology, FB10—Veterinary Medicine, Justus-Liebig-University Giessen, 35392 Giessen, Germany
- Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany
| | - Christiane Herden
- Institute of Veterinary Pathology, FB10—Veterinary Medicine, Justus-Liebig-University Giessen, 35392 Giessen, Germany
- Correspondence: ; Tel.: +49-6419938201
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Krug C, Rigaud E, Siby-Diakite D, Bénézet L, Papadopoulos P, de Valk H, Deffontaines G, Septfons A, Reynes JM. Seroprevalence of Hantavirus in Forestry Workers, Northern France, 2019-2020. Viruses 2023; 15:v15020338. [PMID: 36851558 PMCID: PMC9962707 DOI: 10.3390/v15020338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/16/2023] [Accepted: 01/21/2023] [Indexed: 01/27/2023] Open
Abstract
We aimed to estimate the seroprevalence of Puumala orthohantavirus (PUUV) among forestry workers in northern France, and to explore sociodemographic risk factors. We conducted a random cross-sectional seroprevalence survey among 1777 forestry workers in 2019-2020. The presence of immunoglobulin G against PUUV antigens in serum was assessed using enzyme-linked immunosorbent assay and confirmed using immunofluorescence assay. Poisson regression models were used to explore factors associated with seropositivity. Weighted seroprevalence was 5% (3-6) in northeastern France, 4% (2-6) in north central France, and 1% in two regions located in the center of the country (Auvergne and Limousin). There were no seropositive workers detected in northwestern France. Seropositivity was associated with age, sex, and cumulative seniority in the forestry sector. Seroprevalence was highest in known endemic areas of the northeast and lowest in the northwest. Nevertheless, we found serological evidence of PUUV infection in two regions located in the center of the country, suggesting circulation of the virus in these regions, previously thought to be non-endemic.
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Affiliation(s)
- Catarina Krug
- Santé Publique France, 94410 Saint-Maurice, France
- European Centre for Disease Prevention and Control (ECDC), 169 73 Solna, Sweden
| | - Emma Rigaud
- Caisse Centrale de la Mutualité Sociale Agricole, 93000 Bobigny, France
| | | | | | | | | | | | | | - Jean-Marc Reynes
- Institut Pasteur, Université Paris Cité, 75015 Paris, France
- Correspondence: ; Tel.: +33-1-40-61-38-08
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Cirkovic V, Dellicour S, Stamenkovic G, Siljic M, Gligic A, Stanojevic M. Phylogeographic analysis of Tula hantavirus highlights a single introduction to central Europe. Virus Evol 2022; 8:veac112. [PMID: 37954511 PMCID: PMC10634634 DOI: 10.1093/ve/veac112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/07/2022] [Accepted: 12/21/2022] [Indexed: 11/14/2023] Open
Abstract
Orthohantaviruses are zoonotic pathogens of humans, unique among the bunyaviruses in not being transmitted by an arthropod vector. Tula orthohantavirus (TULV) is an old-world hantavirus, of yet unclear human pathogenicity, with few reported cases of clinically relevant human infection. So far, phylogeographic studies exploring the global pathways of hantaviral migration are scarce and generally do not focus on a specific hantavirus species. The aim of the present study was to reconstruct the dispersal history of TULV lineages across Eurasia based on S segment sequences sampled from different geographic areas. Maximum-likelihood and Bayesian inference methods were used to perform the phylogenetic analysis and phylogeographic reconstructions. Sampling time and trapping localities were obtained for a total of 735 TULV S segment sequences available in public databases at the time of the study. The estimated substitution rate of the analyzed partial S segment alignment was 2.26 × 10-3 substitutions/site/year (95 per cent highest posterior density interval: 1.79 × 10-3 to 2.75 × 10-3). Continuous phylogeography of TULV S segment sequences placed the potential root and origin of TULV spread in the Black Sea region. In our study, we detect a single-lineage introduction of TULV to Europe, followed by local viral circulation further on.
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Affiliation(s)
- Valentina Cirkovic
- Faculty of Medicine, University of
Belgrade, Dr Subotica 8, Belgrade 11000, Serbia
| | - Simon Dellicour
- Spatial Epidemiology Lab (SpELL), Université
Libre de Bruxelles, CP160/13, 50, av. FD Roosevelt, Bruxelles 1050,
Belgium
- Department of Microbiology, Immunology and
Transplantation, Rega Institute, KU Leuven, Herestraat 49, Leuven 3000,
Belgium
| | - Gorana Stamenkovic
- University of Belgrade, Institute for Biological Research ‘Siniša
Stanković’, Bulevar despota Stefana 142, Belgrade 11108, Serbia
| | - Marina Siljic
- Faculty of Medicine, University of
Belgrade, Dr Subotica 8, Belgrade 11000, Serbia
| | - Ana Gligic
- Institute of Virology, Vaccines and Sera Torlak, Vojvode
Stepe 458, Belgrade 11000, Serbia
| | - Maja Stanojevic
- Faculty of Medicine, University of
Belgrade, Dr Subotica 8, Belgrade 11000, Serbia
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Razzauti M, Castel G, Cosson JF. Impact of Landscape on Host-Parasite Genetic Diversity and Distribution Using the Puumala orthohantavirus-Bank Vole System. Microorganisms 2021; 9:microorganisms9071516. [PMID: 34361952 PMCID: PMC8306195 DOI: 10.3390/microorganisms9071516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/09/2021] [Accepted: 07/12/2021] [Indexed: 11/16/2022] Open
Abstract
In nature, host specificity has a strong impact on the parasite's distribution, prevalence, and genetic diversity. The host's population dynamics is expected to shape the distribution of host-specific parasites. In turn, the parasite's genetic structure is predicted to mirror that of the host. Here, we study the tandem Puumala orthohantavirus (PUUV)-bank vole system. The genetic diversity of 310 bank voles and 33 PUUV isolates from 10 characterized localities of Northeast France was assessed. Our findings show that the genetic diversity of both PUUV and voles, was positively correlated with forest coverage and contiguity of habitats. While the genetic diversity of voles was weakly structured in space, that of PUUV was found to be strongly structured, suggesting that the dispersion of voles was not sufficient to ensure a broad PUUV dissemination. Genetic diversity of PUUV was mainly shaped by purifying selection. Genetic drift and extinction events were better reflected than local adaptation of PUUV. These contrasting patterns of microevolution have important consequences for the understanding of PUUV distribution and epidemiology.
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Affiliation(s)
- Maria Razzauti
- CBGP, INRAE, CIRAD, IRD, Montpellier SupAgro, Université Montpellier, 34000 Montpellier, France;
- Correspondence:
| | - Guillaume Castel
- CBGP, INRAE, CIRAD, IRD, Montpellier SupAgro, Université Montpellier, 34000 Montpellier, France;
| | - Jean-François Cosson
- UMR BIPAR, Animal Health Laboratory, ANSES, INRAE, Ecole Nationale Vétérinaire d’Alfort, Université Paris-Est, 94700 Maisons-Alfort, France;
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Schmidt S, Reil D, Jeske K, Drewes S, Rosenfeld UM, Fischer S, Spierling NG, Labutin A, Heckel G, Jacob J, Ulrich RG, Imholt C. Spatial and Temporal Dynamics and Molecular Evolution of Tula orthohantavirus in German Vole Populations. Viruses 2021; 13:1132. [PMID: 34208398 PMCID: PMC8231151 DOI: 10.3390/v13061132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/21/2021] [Accepted: 06/03/2021] [Indexed: 12/21/2022] Open
Abstract
Tula orthohantavirus (TULV) is a rodent-borne hantavirus with broad geographical distribution in Europe. Its major reservoir is the common vole (Microtus arvalis), but TULV has also been detected in closely related vole species. Given the large distributional range and high amplitude population dynamics of common voles, this host-pathogen complex presents an ideal system to study the complex mechanisms of pathogen transmission in a wild rodent reservoir. We investigated the dynamics of TULV prevalence and the subsequent potential effects on the molecular evolution of TULV in common voles of the Central evolutionary lineage. Rodents were trapped for three years in four regions of Germany and samples were analyzed for the presence of TULV-reactive antibodies and TULV RNA with subsequent sequence determination. The results show that individual (sex) and population-level factors (abundance) of hosts were significant predictors of local TULV dynamics. At the large geographic scale, different phylogenetic TULV clades and an overall isolation-by-distance pattern in virus sequences were detected, while at the small scale (<4 km) this depended on the study area. In combination with an overall delayed density dependence, our results highlight that frequent, localized bottleneck events for the common vole and TULV do occur and can be offset by local recolonization dynamics.
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Affiliation(s)
- Sabrina Schmidt
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Daniela Reil
- Animal Ecology, Institute of Biochemistry and Biology, University of Potsdam, 14469 Potsdam, Germany;
| | - Kathrin Jeske
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Stephan Drewes
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Ulrike M. Rosenfeld
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Stefan Fischer
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Nastasja G. Spierling
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Anton Labutin
- Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland; (A.L.); (G.H.)
| | - Gerald Heckel
- Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland; (A.L.); (G.H.)
| | - Jens Jacob
- Institute for Plant Protection in Horticulture and Forests, Julius Kühn-Institute (JKI), 48161 Münster, Germany;
| | - Rainer G. Ulrich
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, 17493 Greifswald-Insel Riems, Germany; (S.S.); (K.J.); (S.D.); (U.M.R.); (S.F.); (N.G.S.); (R.G.U.)
| | - Christian Imholt
- Institute for Plant Protection in Horticulture and Forests, Julius Kühn-Institute (JKI), 48161 Münster, Germany;
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Gorosito I, BenÍtez A, Busch M. Home range variability, spatial aggregation, and excursions of Akodon azarae and Oligoryzomys flavescens in Pampean agroecosystems. Integr Zool 2020; 15:401-415. [PMID: 32304184 DOI: 10.1111/1749-4877.12437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Rodents are reservoirs of various types of hantavirus, some of which are agents of hantavirus pulmonary syndrome in humans. Each hantavirus is associated with a single rodent host species but successive spill-over events may eventually lead to host-switching and new species' becoming host of a given pathogen. This study aims to gain an understanding of the spatial ecology of two hantavirus-host species, Akodon azarae, and Oligoryzomys flavescens, by identifying factors modulating their home range sizes and stability, and by evaluating intra- and interspecific spatial aggregation for these species and a third one-Oxymycterus rufus-living in sympatry. For this, eleven capture-mark-recapture surveys were carried out, spanning 22 months. We found that A. azarae males have larger and more mobile home ranges than females, independently of the season. Consequently, males could likely have a more relevant role in the transmission of hantavirus because of their greater exposure both to a higher number of contacts between individuals and viral contamination of the environment. Contrasting, O. flavescens individuals showed negligible displacements of their home range through time, which could limit the range of hantavirus spread in host populations. Since O. flavescens is host to Lechiguanas hantavirus (pathogenic to humans) this result encompasses epidemiological relevance, for it may imply the existence of local foci of infection. Additionally, individuals of both species performed excursions outside their home ranges. These events could enable hantavirus spread over distances beyond the normal range of movements and lead to new hantavirus outbreaks in formerly non-infected rodent populations, favoring the persistence of the virus in nature.
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Affiliation(s)
- Irene Gorosito
- Laboratorio de, Ecología de Poblaciones, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Ailén BenÍtez
- Laboratorio de Ecología de Poblaciones, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Maria Busch
- Laboratorio de Ecología de Poblaciones, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and Instituto de Ecología, Genética y Evolución de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
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8
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Holland EP, Binny RN, James A. Optimal control of irrupting pest populations in a climate-driven ecosystem. PeerJ 2019; 6:e6146. [PMID: 30595990 PMCID: PMC6304269 DOI: 10.7717/peerj.6146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/21/2018] [Indexed: 11/20/2022] Open
Abstract
Irruptions of small consumer populations, driven by pulsed resources, can lead to adverse effects including the decline of indigenous species or increased disease spread. Broad-scale pest management to combat such effects benefits from forecasting of irruptions and an assessment of the optimal control conditions for minimising consumer abundance. We use a climate-based consumer-resource model to predict irruptions of a pest species (Mus musculus) population in response to masting (episodic synchronous seed production) and extend this model to account for broad-scale pest control of mice using toxic bait. The extended model is used to forecast the magnitude and frequency of pest irruptions under low, moderate and high control levels, and for different timings of control operations. In particular, we assess the optimal control timing required to minimise the frequency with which pests reach 'plague' levels, whilst avoiding excessive toxin use. Model predictions suggest the optimal timing for mouse control in beech forest, with respect to minimising plague time, is mid-September. Of the control regimes considered, a seedfall driven biannual-biennial regime gave the greatest reduction in plague time and plague years for low and moderate control levels. Although inspired by a model validated using house mouse populations in New Zealand forests, our modelling approach is easily adapted for application to other climate-driven systems where broad-scale control is conducted on irrupting pest populations.
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Affiliation(s)
| | | | - Alex James
- Biomathematics Research Centre, University of Canterbury, Christchurch, New Zealand.,Te Pūnaha Matatini, New Zealand
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Monchatre-Leroy E, Murri S, Castel G, Calavas D, Boué F, Hénaux V, Marianneau P. First insights into Puumala orthohantavirus circulation in a rodent population in Alsace, France. Zoonoses Public Health 2018; 65:540-551. [PMID: 29577655 DOI: 10.1111/zph.12464] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Indexed: 11/29/2022]
Abstract
In-depth knowledge on the mechanisms that maintain infection by a zoonotic pathogen in an animal reservoir is the key to predicting and preventing transmission to humans. The Puumala orthohantavirus (PUUV), the most prevalent orthohantavirus in Western Europe, causes a mild form of haemorrhagic fever with renal syndrome (HFRS) in humans. In France, this endemic illness affects the north-eastern part of the country. We conducted a 4-year capture-mark-recapture study in a bank vole population, combined with molecular analyses, to explore the epidemiological situation of PUUV in Alsace, a French region where human cases have occurred, but for which no studies have been conducted on this reservoir host. PUUV-infected bank voles were detected in the 2 years that showed high bank vole density with a prevalence of 4%. The individual PUUV sequences identified in this study were similar from year to year and similar to other French sequences. On a very small spatial scale, the distribution of seropositive bank voles was very heterogeneous in time and space. The short distances travelled on average by bank voles resulted in spatial clusters of seropositive rodents, which spread only very gradually throughout the year.
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Affiliation(s)
| | - S Murri
- Laboratoire de Lyon, ANSES, Unité de virologie, Lyon, France
| | - G Castel
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - D Calavas
- Laboratoire de Lyon, ANSES, Unité d'épidémiologie, Lyon, France
| | - F Boué
- Laboratoire de la rage et de la Faune Sauvage, ANSES, Nancy, France
| | - V Hénaux
- Laboratoire de Lyon, ANSES, Unité d'épidémiologie, Lyon, France
| | - P Marianneau
- Laboratoire de Lyon, ANSES, Unité de virologie, Lyon, France
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10
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Bank vole immunoheterogeneity may limit Nephropatia Epidemica emergence in a French non-endemic region. Parasitology 2017; 145:393-407. [PMID: 28931451 DOI: 10.1017/s0031182017001548] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ecoevolutionary processes affecting hosts, vectors and pathogens are important drivers of zoonotic disease emergence. In this study, we focused on nephropathia epidemica (NE), which is caused by Puumala hantavirus (PUUV) whose natural reservoir is the bank vole, Myodes glareolus. We questioned the possibility of NE emergence in a French region that is considered to be NE-free but that is adjacent to a NE-endemic region. We first confirmed the epidemiology of these two regions and we demonstrated the absence of spatial barriers that could have limited dispersal, and consequently, the spread of PUUV into the NE-free region. We next tested whether regional immunoheterogeneity could impact PUUV chances to circulate and persist in the NE-free region. We showed that bank voles from the NE-free region were sensitive to experimental PUUV infection. We observed high levels of immunoheterogeneity between individuals and also between regions. Antiviral gene expression (Tnf and Mx2) reached higher levels in bank voles from the NE-free region. During experimental infections, anti-PUUV antibody production was higher in bank voles from the NE-endemic region. These results indicated a lower susceptibility to PUUV for bank voles from this NE-free region, which might limit PUUV persistence and therefore, the risk of NE.
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11
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Dubois A, Castel G, Murri S, Pulido C, Pons JB, Benoit L, Loiseau A, Lakhdar L, Galan M, Charbonnel N, Marianneau P. Experimental infections of wild bank voles ( Myodes glareolus ) from nephropatia epidemica endemic and non-endemic regions revealed slight differences in Puumala virological course and immunological responses. Virus Res 2017; 235:67-72. [DOI: 10.1016/j.virusres.2017.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 04/04/2017] [Accepted: 04/04/2017] [Indexed: 12/20/2022]
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Reil D, Rosenfeld UM, Imholt C, Schmidt S, Ulrich RG, Eccard JA, Jacob J. Puumala hantavirus infections in bank vole populations: host and virus dynamics in Central Europe. BMC Ecol 2017; 17:9. [PMID: 28245831 PMCID: PMC5331674 DOI: 10.1186/s12898-017-0118-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 02/08/2017] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND In Europe, bank voles (Myodes glareolus) are widely distributed and can transmit Puumala virus (PUUV) to humans, which causes a mild to moderate form of haemorrhagic fever with renal syndrome, called nephropathia epidemica. Uncovering the link between host and virus dynamics can help to prevent human PUUV infections in the future. Bank voles were live trapped three times a year in 2010-2013 in three woodland plots in each of four regions in Germany. Bank vole population density was estimated and blood samples collected to detect PUUV specific antibodies. RESULTS We demonstrated that fluctuation of PUUV seroprevalence is dependent not only on multi-annual but also on seasonal dynamics of rodent host abundance. Moreover, PUUV infection might affect host fitness, because seropositive individuals survived better from spring to summer than uninfected bank voles. Individual space use was independent of PUUV infections. CONCLUSIONS Our study provides robust estimations of relevant patterns and processes of the dynamics of PUUV and its rodent host in Central Europe, which are highly important for the future development of predictive models for human hantavirus infection risk.
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Affiliation(s)
- Daniela Reil
- Institute for Plant Protection in Horticulture and Forests, Vertebrate Research, Julius Kühn-Institute, Toppheideweg 88, 48161 Muenster, Germany
- Institute of Biochemistry and Biology, Animal Ecology, University of Potsdam, Maulbeerallee 1, 14469 Potsdam, Germany
| | - Ulrike M. Rosenfeld
- Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Christian Imholt
- Institute for Plant Protection in Horticulture and Forests, Vertebrate Research, Julius Kühn-Institute, Toppheideweg 88, 48161 Muenster, Germany
| | - Sabrina Schmidt
- Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Rainer G. Ulrich
- Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Jana A. Eccard
- Institute of Biochemistry and Biology, Animal Ecology, University of Potsdam, Maulbeerallee 1, 14469 Potsdam, Germany
| | - Jens Jacob
- Institute for Plant Protection in Horticulture and Forests, Vertebrate Research, Julius Kühn-Institute, Toppheideweg 88, 48161 Muenster, Germany
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13
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Maas M, de Vries A, van Roon A, Takumi K, van der Giessen J, Rockx B. High Prevalence of Tula Hantavirus in Common Voles in The Netherlands. Vector Borne Zoonotic Dis 2017; 17:200-205. [PMID: 28112627 DOI: 10.1089/vbz.2016.1995] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Tula virus (TULV) is a zoonotic hantavirus. Knowledge about TULV in the Netherlands is very scarce. Therefore in 2014, 49 common voles (Microtus arvalis) from a region in the south of the Netherlands, and in 2015, 241 common voles from regions in the north of the Netherlands were tested with the TULV quantitative RT-PCR. In the southern region, prevalence of TULV was 41% (20/49). In the northern regions, prevalence ranged from 12% (4/34) to 45% (17/38). Phylogenetic analysis of the obtained sequences showed that the regions fall within different clusters. Voles from the south were also tested on-site for the presence of hantavirus antibodies, but serology results were poorly associated with qRT-PCR results. These findings suggest that TULV may be more widespread than previously thought. No human TULV cases have been reported thus far in the Netherlands, but differentiation between infection by TULV or the closely related Puumala virus is not made in humans in the Netherlands, thus cases may be misdiagnosed.
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Affiliation(s)
- Miriam Maas
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) , Bilthoven, the Netherlands
| | - Ankje de Vries
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) , Bilthoven, the Netherlands
| | - Annika van Roon
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) , Bilthoven, the Netherlands
| | - Katsuhisa Takumi
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) , Bilthoven, the Netherlands
| | - Joke van der Giessen
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) , Bilthoven, the Netherlands
| | - Barry Rockx
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM) , Bilthoven, the Netherlands
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14
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Dubois A, Galan M, Cosson JF, Gauffre B, Henttonen H, Niemimaa J, Razzauti M, Voutilainen L, Vitalis R, Guivier E, Charbonnel N. Microevolution of bank voles (Myodes glareolus) at neutral and immune-related genes during multiannual dynamic cycles: Consequences for Puumala hantavirus epidemiology. INFECTION GENETICS AND EVOLUTION 2016; 49:318-329. [PMID: 27956196 DOI: 10.1016/j.meegid.2016.12.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 01/02/2023]
Abstract
Understanding how host dynamics, including variations of population size and dispersal, may affect the epidemiology of infectious diseases through ecological and evolutionary processes is an active research area. Here we focus on a bank vole (Myodes glareolus) metapopulation surveyed in Finland between 2005 and 2009. Bank vole is the reservoir of Puumala hantavirus (PUUV), the agent of nephropathia epidemica (NE, a mild form of hemorrhagic fever with renal symptom) in humans. M. glareolus populations experience multiannual density fluctuations that may influence the level of genetic diversity maintained in bank voles, PUUV prevalence and NE occurrence. We examine bank vole metapopulation genetics at presumably neutral markers and immune-related genes involved in susceptibility to PUUV (Tnf-promoter, Tlr4, Tlr7 and Mx2 gene) to investigate the links between population dynamics, microevolutionary processes and PUUV epidemiology. We show that genetic drift slightly and transiently affects neutral and adaptive genetic variability within the metapopulation. Gene flow seems to counterbalance its effects during the multiannual density fluctuations. The low abundance phase may therefore be too short to impact genetic variation in the host, and consequently viral genetic diversity. Environmental heterogeneity does not seem to affect vole gene flow, which might explain the absence of spatial structure previously detected in PUUV in this area. Besides, our results suggest the role of vole dispersal on PUUV circulation through sex-specific and density-dependent movements. We find little evidence of selection acting on immune-related genes within this metapopulation. Footprint of positive selection is detected at Tlr-4 gene in 2008 only. We observe marginally significant associations between Mx2 genotype and PUUV genogroups. These results show that neutral processes seem to be the main factors affecting the evolution of these immune-related genes at a contemporary scale, although the relative effects of neutral and adaptive forces could vary temporally with density fluctuations. Immune related gene polymorphism may in turn partly influence PUUV epidemiology in this metapopulation.
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Affiliation(s)
- Adelaïde Dubois
- INRA, UMR CBGP, F-34988 Montferrier-sur-Lez, France; Anses, Unité de Virologie, 31 avenue Tony Garnier, 69364 Lyon, France.
| | - Maxime Galan
- INRA, UMR CBGP, F-34988 Montferrier-sur-Lez, France
| | - Jean-François Cosson
- INRA, UMR CBGP, F-34988 Montferrier-sur-Lez, France; INRA-ANSES-ENVA, UMR 0956 BIPAR, Maisons-Alfort, France
| | | | | | - Jukka Niemimaa
- Natural Resources Institute Finland, FI-013012 Vantaa, Finland
| | | | - Liina Voutilainen
- Natural Resources Institute Finland, FI-013012 Vantaa, Finland; Department of Virology, University of Helsinki, FI-00014 Helsinki, Finland
| | | | - Emmanuel Guivier
- Biogeosciences, CNRS UMR 6282, Université de Bourgogne, Franche-Comté, 21000, Dijon, France
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15
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Monchatre-Leroy E, Crespin L, Boué F, Marianneau P, Calavas D, Hénaux V. Spatial and Temporal Epidemiology of Nephropathia Epidemica Incidence and Hantavirus Seroprevalence in Rodent Hosts: Identification of the Main Environmental Factors in Europe. Transbound Emerg Dis 2016; 64:1210-1228. [PMID: 26996739 DOI: 10.1111/tbed.12494] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Indexed: 01/05/2023]
Abstract
In Europe, the increasing number of nephropathia epidemica (NE) infections in humans, caused by Puumala virus carried by bank voles (Myodes glareolus), has triggered studies of environmental factors driving these infections. NE infections have been shown to occur in specific geographical areas characterized by environmental factors that influence the distribution and dynamics of host populations and virus persistence in the soil. Here, we review the influence of environmental conditions (including climate factors, food availability and habitat conditions) with respect to incidence in humans and seroprevalence in rodents, considering both direct and indirect transmission pathways. For each type of environmental factor, results and discrepancies between studies are presented and examined in the light of biological hypotheses. Overall, food availability and temperature appear to be the main drivers of host seroprevalence and NE incidence, but data quality and statistical approaches varied greatly among studies. We highlight the issues that now need to be addressed and suggest improvements for study design in regard to the current knowledge on hantavirus epidemiology.
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Affiliation(s)
| | - L Crespin
- INRA, UR346 d'Epidémiologie Animale, F63122 Saint Genès Champanelle, Université de Lyon, Lyon, France.,Université Lyon 1, Lyon, France.,CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Villeurbanne, France
| | - F Boué
- Laboratoire de la rage et de la faune sauvage, ANSES, Nancy, France
| | - P Marianneau
- Unité de virologie, Laboratoire de Lyon, ANSES, Lyon, France
| | - D Calavas
- Unité d'épidémiologie, Laboratoire de Lyon, ANSES, Lyon, France
| | - V Hénaux
- Unité d'épidémiologie, Laboratoire de Lyon, ANSES, Lyon, France
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16
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Khalil H, Ecke F, Evander M, Hörnfeldt B. Selective predation on hantavirus-infected voles by owls and confounding effects from landscape properties. Oecologia 2016; 181:597-606. [PMID: 26873607 DOI: 10.1007/s00442-016-3580-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 02/01/2016] [Indexed: 11/26/2022]
Abstract
It has been suggested that predators may protect human health through reducing disease-host densities or selectively preying on infected individuals from the population. However, this has not been tested empirically. We hypothesized that Tengmalm's owl (Aegolius funereus) selectively preys on hantavirus-infected individuals of its staple prey, the bank vole (Myodes glareolus). Bank voles are hosts of Puumala hantavirus, which causes a form of hemorrhagic fever in humans. Selective predation by owls on infected voles may reduce human disease risk. We compared the prevalence of anti-Puumala hantavirus antibodies (seroprevalence), in bank voles cached by owls in nest boxes to seroprevalence in voles trapped in closed-canopy forest around each nest box. We found no general difference in seroprevalence. Forest landscape structure could partly account for the observed patterns in seroprevalence. Only in more connected forest patches was seroprevalence in bank voles cached in nest boxes higher than seroprevalence in trapped voles. This effect disappeared with increasing forest patch isolation, as seroprevalence in trapped voles increased with forest patch isolation, but did not in cached voles. Our results suggest a complex relationship between zoonotic disease prevalence in hosts, their predators, and landscape structure. Some mechanisms that may have caused the seroprevalence patterns in our results include higher bank vole density in isolated forest patches. This study offers future research potential to shed further light on the contribution of predators and landscape properties to human health.
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Affiliation(s)
- Hussein Khalil
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), Skogsmarksgränd, 901 83, Umeå, Sweden.
| | - Frauke Ecke
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), Skogsmarksgränd, 901 83, Umeå, Sweden
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Magnus Evander
- Department of Clinical Microbiology, Virology, Umeå University, 901 85, Umeå, Sweden
| | - Birger Hörnfeldt
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), Skogsmarksgränd, 901 83, Umeå, Sweden
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17
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Jiang H, Du H, Wang LM, Wang PZ, Bai XF. Hemorrhagic Fever with Renal Syndrome: Pathogenesis and Clinical Picture. Front Cell Infect Microbiol 2016; 6:1. [PMID: 26870699 PMCID: PMC4737898 DOI: 10.3389/fcimb.2016.00001] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/05/2016] [Indexed: 01/08/2023] Open
Abstract
Hantaan virus (HTNV) causes hemorrhagic fever with renal syndrome (HFRS), which is a zoonosis endemic in eastern Asia, especially in China. The reservoir host of HTNV is field mouse (Apodemus agraricus). The main manifestation of HFRS, including acute kidney injury, increases vascular permeability, and coagulation abnormalities. In this paper, we review the current knowledge of the pathogenesis of HFRS including virus factor, immunity factor and host genetic factors. Furthermore, the treatment and prevention will be discussed.
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Affiliation(s)
- Hong Jiang
- Center for Infectious Diseases, Tangdu Hospital, Fourth Military Medical University Xi'an, China
| | - Hong Du
- Center for Infectious Diseases, Tangdu Hospital, Fourth Military Medical University Xi'an, China
| | - Li M Wang
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University Xi'an, China
| | - Ping Z Wang
- Center for Infectious Diseases, Tangdu Hospital, Fourth Military Medical University Xi'an, China
| | - Xue F Bai
- Center for Infectious Diseases, Tangdu Hospital, Fourth Military Medical University Xi'an, China
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18
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Schmidt S, Saxenhofer M, Drewes S, Schlegel M, Wanka KM, Frank R, Klimpel S, von Blanckenhagen F, Maaz D, Herden C, Freise J, Wolf R, Stubbe M, Borkenhagen P, Ansorge H, Eccard JA, Lang J, Jourdain E, Jacob J, Marianneau P, Heckel G, Ulrich RG. High genetic structuring of Tula hantavirus. Arch Virol 2016; 161:1135-49. [PMID: 26831932 DOI: 10.1007/s00705-016-2762-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 01/14/2016] [Indexed: 10/22/2022]
Abstract
Tula virus (TULV) is a vole-associated hantavirus with low or no pathogenicity to humans. In the present study, 686 common voles (Microtus arvalis), 249 field voles (Microtus agrestis) and 30 water voles (Arvicola spec.) were collected at 79 sites in Germany, Luxembourg and France and screened by RT-PCR and TULV-IgG ELISA. TULV-specific RNA and/or antibodies were detected at 43 of the sites, demonstrating a geographically widespread distribution of the virus in the studied area. The TULV prevalence in common voles (16.7 %) was higher than that in field voles (9.2 %) and water voles (10.0 %). Time series data at ten trapping sites showed evidence of a lasting presence of TULV RNA within common vole populations for up to 34 months, although usually at low prevalence. Phylogenetic analysis demonstrated a strong genetic structuring of TULV sequences according to geography and independent of the rodent species, confirming the common vole as the preferential host, with spillover infections to co-occurring field and water voles. TULV phylogenetic clades showed a general association with evolutionary lineages in the common vole as assessed by mitochondrial DNA sequences on a large geographical scale, but with local-scale discrepancies in the contact areas.
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Affiliation(s)
- Sabrina Schmidt
- Federal Research Institute for Animal Health, OIE Collaborating Centre for Zoonoses in Europe, Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Moritz Saxenhofer
- Computational and Molecular Population Genetics (CMPG), Institute of Ecology and Evolution, University of Bern, 3012, Bern, Switzerland.,Swiss Institute of Bioinformatics, Genopode, 1015, Lausanne, Switzerland
| | - Stephan Drewes
- Federal Research Institute for Animal Health, OIE Collaborating Centre for Zoonoses in Europe, Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Mathias Schlegel
- Federal Research Institute for Animal Health, OIE Collaborating Centre for Zoonoses in Europe, Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17493, Greifswald, Insel Riems, Germany.,Seramun Diagnostica GmbH, 15754, Heidesee, Germany
| | - Konrad M Wanka
- Federal Research Institute for Animal Health, OIE Collaborating Centre for Zoonoses in Europe, Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Raphael Frank
- Goethe-University, Institute of Ecology, Evolution and Diversity, Senckenberg Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, 60438, Frankfurt am Main, Germany
| | - Sven Klimpel
- Goethe-University, Institute of Ecology, Evolution and Diversity, Senckenberg Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, 60438, Frankfurt am Main, Germany
| | | | - Denny Maaz
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, 14163, Berlin, Germany
| | - Christiane Herden
- Institute for Veterinary Pathology, Justus-Liebig-Universität Gießen, 35392, Gießen, Germany
| | - Jona Freise
- Task-Force Veterinärwesen, Fachbereich Schädlingsbekämpfung, Niedersächsisches Landesamt für Verbraucherschutz und Lebensmittelsicherheit, 26133, Oldenburg, Germany
| | - Ronny Wolf
- Institute for Biology, University of Leipzig, 04103, Leipzig, Germany
| | - Michael Stubbe
- Institute of Zoology, Martin-Luther-University Halle, 06099, Halle, Germany
| | - Peter Borkenhagen
- Säugetierkundliche Arbeitsgemeinschaft Schleswig-Holstein, 24253, Probsteierhagen, Germany
| | - Hermann Ansorge
- Senckenberg Museum of Natural History, 02826, Görlitz, Germany
| | - Jana A Eccard
- Institute for Biochemistry and Biology, Animal Ecology, University of Potsdam, 14469, Potsdam, Germany
| | - Johannes Lang
- Institut für Tierökologie und Naturbildung, Hauptstraße 30, 35321, Gonterskirchen, Germany
| | - Elsa Jourdain
- INRA, French National Institute for Agricultural Research, UR0346 Animal Epidemiology Unit, Saint-Genès Champanelle, France
| | - Jens Jacob
- Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and Forestry, Vertebrate Research, Julius Kühn-Institute, 48161, Münster, Germany
| | - Philippe Marianneau
- Virology Unit, Laboratory of Lyon, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 69364, Lyon, France
| | - Gerald Heckel
- Computational and Molecular Population Genetics (CMPG), Institute of Ecology and Evolution, University of Bern, 3012, Bern, Switzerland.,Swiss Institute of Bioinformatics, Genopode, 1015, Lausanne, Switzerland
| | - Rainer G Ulrich
- Federal Research Institute for Animal Health, OIE Collaborating Centre for Zoonoses in Europe, Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17493, Greifswald, Insel Riems, Germany.
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19
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Thoma BR, Müller J, Bässler C, Georgi E, Osterberg A, Schex S, Bottomley C, Essbauer SS. Identification of factors influencing the Puumala virus seroprevalence within its reservoir in aMontane Forest Environment. Viruses 2014; 6:3944-67. [PMID: 25341661 PMCID: PMC4213572 DOI: 10.3390/v6103944] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 09/03/2014] [Accepted: 09/29/2014] [Indexed: 12/28/2022] Open
Abstract
Puumala virus (PUUV) is a major cause of mild to moderate haemorrhagic fever with renal syndrome and is transmitted by the bank vole (Myodes glareolus). There has been a high cumulative incidence of recorded human cases in South-eastern Germany since 2004 when the region was first recognized as being endemic for PUUV. As the area is well known for outdoor recreation and the Bavarian Forest National Park (BFNP) is located in the region, the increasing numbers of recorded cases are of concern. To understand the population and environmental effects on the seroprevalence of PUUV in bank voles we trapped small mammals at 23 sites along an elevation gradient from 317 to 1420m above sea level. Generalized linear mixed effects models(GLMEM) were used to explore associations between the seroprevalence of PUUV in bank voles and climate and biotic factors. We found that the seroprevalence of PUUV was low (6%–7%) in 2008 and 2009, and reached 29% in 2010. PUUV seroprevalence was positively associated with the local species diversity and deadwood layer, and negatively associated with mean annual temperature, mean annual solar radiation, and herb layer. Based on these findings, an illustrative risk map for PUUV seroprevalence prediction in bank voles was created for an area of the national park. The map will help when planning infrastructure in the national park (e.g., huts, shelters, and trails).
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Affiliation(s)
- Bryan R Thoma
- Bundeswehr Institute of Microbiology, Neuherbergstr. 11, 80937 Munich, Germany.
| | - Jörg Müller
- Bavarian Forest National Park, Freyunger Str. 2, 94481 Grafenau, Germany.
| | - Claus Bässler
- Bavarian Forest National Park, Freyunger Str. 2, 94481 Grafenau, Germany.
| | - Enrico Georgi
- Bundeswehr Institute of Microbiology, Neuherbergstr. 11, 80937 Munich, Germany.
| | - Anja Osterberg
- Bundeswehr Institute of Microbiology, Neuherbergstr. 11, 80937 Munich, Germany.
| | - Susanne Schex
- Bundeswehr Institute of Microbiology, Neuherbergstr. 11, 80937 Munich, Germany.
| | - Christian Bottomley
- MRC Tropical Epidemiology Group, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK.
| | - Sandra S Essbauer
- Bundeswehr Institute of Microbiology, Neuherbergstr. 11, 80937 Munich, Germany.
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20
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Stamenković G, Nikolić V, Blagojević J, Bugarski-Stanojević V, Adnađević T, Stanojević M, Vujošević M. Genetic analysis of Dobrava-Belgrade virus from western Serbia--a newly detected focus in the Balkan Peninsula. Zoonoses Public Health 2014; 62:141-50. [PMID: 24867363 DOI: 10.1111/zph.12136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Indexed: 12/20/2022]
Abstract
Dobrava-Belgrade virus (DOBV) is a hantavirus species that causes the most severe form of haemorrhagic fever with renal syndrome (HFRS) in Europe. DOBV has been detected in three Apodemus rodents: A. flavicollis, A. agrarius and A. ponticus. These emerging viruses appear throughout the Balkan Peninsula including Serbia as its central part. In this study, we examined the seroprevalence, molecular epidemiology and phylogenetics of DOBV from A. flavicollis captured at six Serbian localities. Furthermore, we applied microsatellite typing of host animal genome to analyse the role of host kinship in DOBV animal transmission. The overall IgG seropositivity rate over 3 years (2008-2010) was 11.9% (22/185). All seropositive samples were subjected to RT-PCR and DNA sequencing for S and L genome segments (pos. 291-1079 nt and 2999-3316 nt, respectively). DOBV was genetically detected in three samples from mountain Tara in western Serbia, a newly detected DOBV focus in the Balkans. No sequence data from human cases from Serbia are available for the studied period. However, collected DOBV isolates in this work phylogenetically clustered together with isolates from Serbian human cases dating from 2002, with 1.9% nucleotide divergence. We determined the level of kinship between seropositive and seronegative animal groups and found no significant difference, suggesting that horizontal virus transmission in the studied population was the same within and among the hatches. Our findings are the first genetic detection of DOBV in rodents in Serbia. We confirm wide and continuous hantavirus presence in the examined parts of the Balkans, underlying the necessity of continual monitoring of hantavirus circulation in A. flavicollis.
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Affiliation(s)
- G Stamenković
- Department of Genetic Research, Institute for biological research "Siniša Stanković", University of Belgrade, Belgrade, Serbia
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21
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Immunogenetic factors affecting susceptibility of humans and rodents to hantaviruses and the clinical course of hantaviral disease in humans. Viruses 2014; 6:2214-41. [PMID: 24859344 PMCID: PMC4036553 DOI: 10.3390/v6052214] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 03/17/2014] [Accepted: 05/16/2014] [Indexed: 12/11/2022] Open
Abstract
We reviewed the associations of immunity-related genes with susceptibility of humans and rodents to hantaviruses, and with severity of hantaviral diseases in humans. Several class I and class II HLA haplotypes were linked with severe or benign hantavirus infections, and these haplotypes varied among localities and hantaviruses. The polymorphism of other immunity-related genes including the C4A gene and a high-producing genotype of TNF gene associated with severe PUUV infection. Additional genes that may contribute to disease or to PUUV infection severity include non-carriage of the interleukin-1 receptor antagonist (IL-1RA) allele 2 and IL-1β (-511) allele 2, polymorphisms of plasminogen activator inhibitor (PAI-1) and platelet GP1a. In addition, immunogenetic studies have been conducted to identify mechanisms that could be linked with the persistence/clearance of hantaviruses in reservoirs. Persistence was associated during experimental infections with an upregulation of anti-inflammatory responses. Using natural rodent population samples, polymorphisms and/or expression levels of several genes have been analyzed. These genes were selected based on the literature of rodent or human/hantavirus interactions (some Mhc class II genes, Tnf promoter, and genes encoding the proteins TLR4, TLR7, Mx2 and β3 integrin). The comparison of genetic differentiation estimated between bank vole populations sampled over Europe, at neutral and candidate genes, has allowed to evidence signatures of selection for Tnf, Mx2 and the Drb Mhc class II genes. Altogether, these results corroborated the hypothesis of an evolution of tolerance strategies in rodents. We finally discuss the importance of these results from the medical and epidemiological perspectives.
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22
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Guivier E, Galan M, Henttonen H, Cosson JF, Charbonnel N. Landscape features and helminth co-infection shape bank vole immunoheterogeneity, with consequences for Puumala virus epidemiology. Heredity (Edinb) 2013; 112:274-81. [PMID: 24149655 DOI: 10.1038/hdy.2013.103] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 09/09/2013] [Accepted: 09/16/2013] [Indexed: 12/21/2022] Open
Abstract
Heterogeneity in environmental conditions helps to maintain genetic and phenotypic diversity in ecosystems. As such, it may explain why the capacity of animals to mount immune responses is highly variable. The quality of habitat patches, in terms of resources, parasitism, predation and habitat fragmentation may, for example, trigger trade-offs ultimately affecting the investment of individuals in various immunological pathways. We described spatial immunoheterogeneity in bank vole populations with respect to landscape features and co-infection. We focused on the consequences of this heterogeneity for the risk of Puumala hantavirus (PUUV) infection. We assessed the expression of the Tnf-α and Mx2 genes and demonstrated a negative correlation between PUUV load and the expression of these immune genes in bank voles. Habitat heterogeneity was partly associated with differences in the expression of these genes. Levels of Mx2 were lower in large forests than in fragmented forests, possibly due to differences in parasite communities. We previously highlighted the positive association between infection with Heligmosomum mixtum and infection with PUUV. We found that Tnf-α was more strongly expressed in voles infected with PUUV than in uninfected voles or in voles co-infected with the nematode H. mixtum and PUUV. H. mixtum may limit the capacity of the vole to develop proinflammatory responses. This effect may increase the risk of PUUV infection and replication in host cells. Overall, our results suggest that close interactions between landscape features, co-infection and immune gene expression may shape PUUV epidemiology.
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Affiliation(s)
- E Guivier
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro), Campus international de Baillarguet, Montferrier-sur-Lez cedex, France
| | - M Galan
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro), Campus international de Baillarguet, Montferrier-sur-Lez cedex, France
| | - H Henttonen
- Finnish Forest Research Institute, Vantaa, Finland
| | - J-F Cosson
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro), Campus international de Baillarguet, Montferrier-sur-Lez cedex, France
| | - N Charbonnel
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro), Campus international de Baillarguet, Montferrier-sur-Lez cedex, France
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23
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Nikolic V, Stajkovic N, Stamenkovic G, Cekanac R, Marusic P, Siljic M, Gligic A, Stanojevic M. Evidence of recombination in Tula virus strains from Serbia. INFECTION GENETICS AND EVOLUTION 2013; 21:472-8. [PMID: 24008094 DOI: 10.1016/j.meegid.2013.08.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 08/22/2013] [Accepted: 08/23/2013] [Indexed: 11/17/2022]
Abstract
Tula hantavirus (TULV) belongs to Bunyaviridae family, with negative sense RNA genome. Segmented nature of hantaviral genome allows for genetic reassortment, but the evidence of homologous recombination also exists. In this study we analyzed TULV sequences isolated in Serbia on different occasions and from different rodent hosts: 1987 strain from Microtus subterraneus and 2007 strain from Microtus arvalis. Phylogenetic analysis of both L and S segment sequences is suggestive of geographically related clustering, as previously shown for majority of hantaviruses. Reconstruction of phylogenetic tree for TULV S segment showed that both sequences from Serbia clustered together with sequences from East Slovakia, which had previously been shown to be recombinants (Kosice strain). Exploratory recombination analysis, supported by phylogenetic and amino acid pattern analysis, revealed the presence of recombination in the S segment sequences from Serbia, resulting in mosaic-like structure of TULV S segment similar to the one of Kosice strain. Although recombination is considered a rare event in molecular evolution of negative strand RNA viruses, obtained molecular data in this study support evidence of recombination in TULV, in geographically distant regions of Europe.
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Affiliation(s)
| | | | - Gorana Stamenkovic
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic", Belgrade, Serbia
| | | | | | - Marina Siljic
- University of Belgrade Faculty of Medicine, Belgrade, Serbia
| | - Ana Gligic
- Institute of Virology, Vaccines and Sera Torlak, Belgrade, Serbia
| | - Maja Stanojevic
- University of Belgrade Faculty of Medicine, Belgrade, Serbia.
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24
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Heyman P, Thoma BR, Marié JL, Cochez C, Essbauer SS. In Search for Factors that Drive Hantavirus Epidemics. Front Physiol 2012; 3:237. [PMID: 22934002 PMCID: PMC3429022 DOI: 10.3389/fphys.2012.00237] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 06/11/2012] [Indexed: 12/23/2022] Open
Abstract
In Europe, hantaviruses (Bunyaviridae) are small mammal-associated zoonotic and emerging pathogens that can cause hemorrhagic fever with renal syndrome (HFRS). Puumala virus, the main etiological agent carried by the bank vole Myodes glareolus is responsible for a mild form of HFRS while Dobrava virus induces less frequent but more severe cases of HFRS. Since 2000 in Europe, more than 3000 cases of HFRS have been recorded, in average, each year, which is nearly double compared to the previous decade. In addition to this upside long-term trend, significant oscillations occur. Epidemic years appear, usually every 2-4 years, with an increased incidence, generally in localized hot spots. Moreover, the virus has been identified in new areas in the recent years. A great number of surveys have been carried out in order to assess the prevalence of the infection in the reservoir host and to identify links with different biotic and abiotic factors. The factors that drive the infections are related to the density and diversity of bank vole populations, prevalence of infection in the reservoir host, viral excretion in the environment, survival of the virus outside its host, and human behavior, which affect the main transmission virus route through inhalation of infected rodent excreta. At the scale of a rodent population, the prevalence of the infection increases with the age of the individuals but also other parameters, such as sex and genetic variability, interfere. The contamination of the environment may be correlated to the number of newly infected rodents, which heavily excrete the virus. The interactions between these different parameters add to the complexity of the situation and explain the absence of reliable tools to predict epidemics. In this review, the factors that drive the epidemics of hantaviruses in Middle Europe are discussed through a panorama of the epidemiological situation in Belgium, France, and Germany.
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Affiliation(s)
- Paul Heyman
- Epidemiology and Biostatistics, Research Laboratory for Vector-Borne Diseases, Queen Astrid Military Hospital Brussels, Belgium
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25
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Banks SC, Lindenmayer DB, McBurney L, Blair D, Knight EJ, Blyton MDJ. Kin selection in den sharing develops under limited availability of tree hollows for a forest marsupial. Proc Biol Sci 2011; 278:2768-76. [PMID: 21288953 DOI: 10.1098/rspb.2010.2657] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Animal social behaviour is not static with regard to environmental change. Flexibility in cooperative resource use may be an important response to resource decline, mediating the impacts of resource availability on fitness and demography. In forest ecosystems, hollow trees are key den resources for many species, but are declining worldwide owing to forestry. Altered patterns of den sharing may mediate the effects of the decline of this resource. We studied den-sharing interactions among hollow-dependent Australian mountain brushtail possums to investigate how spatial variation in hollow tree availability affects resource sharing and kin selection. Under reduced den availability, individuals used fewer dens and shared them less often. This suggests increased territoriality in the presence of resource competition. Further, there was a switch from kin avoidance to kin preference with decreasing hollow tree availability. This was driven primarily by a change in den sharing among siblings. The inclusive fitness benefits of den sharing with kin are likely to increase under resource-limiting conditions, but are potentially outweighed by the benefits of associating with non-relatives (avoidance of inbreeding or pathogen transmission) where dens are abundant. We discuss how predictions from social evolutionary theory can contribute to understanding animal responses to landscape change.
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Affiliation(s)
- Sam C Banks
- The Fenner School of Environment and Society, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
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26
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Olsson GE, Leirs H, Henttonen H. Hantaviruses and their hosts in Europe: reservoirs here and there, but not everywhere? Vector Borne Zoonotic Dis 2010; 10:549-61. [PMID: 20795916 DOI: 10.1089/vbz.2009.0138] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Five hantaviruses are known to circulate among rodents in Europe, and at least two among insectivores. Four (Dobrava, Saaremaa, Seoul, and Puumala [PUUV] viruses) are clearly associated with hemorrhagic fever with renal syndrome (HFRS). PUUV, the most common etiological agent of HFRS in Europe, is carried by the bank vole (Myodes glareolus), one of the most widespread and abundant mammal species in Europe. This host-virus system is among hantaviruses also the most studied one in Europe. However, HFRS incidence varies throughout the continent. The spatial as well as temporal variation in the occurrence of HFRS is linked to geographic differences in the population dynamics of the reservoir rodents in different biomes of Europe. While rodent abundance may follow mast seeding events in many parts of temperate Europe, in northern (N) Europe multiannual cycles in population density exist as the result of the interaction between rodent populations and specialist predator populations in a delayed density-dependent manner. The spatial distribution of hantaviruses further depends on parameters such as forest patch size and connectivity of the most suitable rodent habitats, and the conditions for the survival of the virus outside the host, as well as historical distribution patterns (phylogeographies) of hosts and viruses. In multiannually fluctuating populations of rodents, with population increases of great amplitude, one should expect a simultaneous build-up of recently hantavirus-infected (shedding) rodents. The increasing number of infectious, virus-shedding rodents leads to a rapid transmission of hantavirus across the rodent population, and to humans. Our review discusses these aspects for PUUV, the only European hantavirus for which there is a reasonable, yet still far from complete, ecological continental-wide understanding. We discuss how this information could translate to other European hantavirus-host systems, and where the most important questions lie for further research.
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Affiliation(s)
- Gert E Olsson
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden.
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27
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Abstract
Landscape genetics has seen rapid growth in number of publications since the term was coined in 2003. An extensive literature search from 1998 to 2008 using keywords associated with landscape genetics yielded 655 articles encompassing a vast array of study organisms, study designs and methodology. These publications were screened to identify 174 studies that explicitly incorporated at least one landscape variable with genetic data. We systematically reviewed this set of papers to assess taxonomic and temporal trends in: (i) geographic regions studied; (ii) types of questions addressed; (iii) molecular markers used; (iv) statistical analyses used; and (v) types and nature of spatial data used. Overall, studies have occurred in geographic regions proximal to developed countries and more commonly in terrestrial vs. aquatic habitats. Questions most often focused on effects of barriers and/or landscape variables on gene flow. The most commonly used molecular markers were microsatellites and amplified fragment length polymorphism (AFLPs), with AFLPs used more frequently in plants than animals. Analysis methods were dominated by Mantel and assignment tests. We also assessed differences among journals to evaluate the uniformity of reporting and publication standards. Few studies presented an explicit study design or explicit descriptions of spatial extent. While some landscape variables such as topographic relief affected most species studied, effects were not universal, and some species appeared unaffected by the landscape. Effects of habitat fragmentation were mixed, with some species altering movement paths and others unaffected. Taken together, although some generalities emerged regarding effects of specific landscape variables, results varied, thereby reinforcing the need for species-specific work. We conclude by: highlighting gaps in knowledge and methodology, providing guidelines to authors and reviewers of landscape genetics studies, and suggesting promising future directions of inquiry.
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Affiliation(s)
- Andrew Storfer
- School of Biological Sciences, Washington State University, Pullman, WA 99164, USA.
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28
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Guivier E, Galan M, Salvador AR, Xuéreb A, Chaval Y, Olsson GE, Essbauer S, Henttonen H, Voutilainen L, Cosson JF, Charbonnel N. Tnf-α expression and promoter sequences reflect the balance of tolerance/resistance to Puumala hantavirus infection in European bank vole populations. INFECTION GENETICS AND EVOLUTION 2010; 10:1208-17. [PMID: 20691810 DOI: 10.1016/j.meegid.2010.07.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Revised: 07/12/2010] [Accepted: 07/29/2010] [Indexed: 01/17/2023]
Abstract
The tumor necrosis factor-alpha (TNF-α) influences the ability to limit parasite infection but its over-production might result in inflammatory disorders. The level of Tnf-α gene expression could thus mediate a balance of tolerance/resistance to infections. This study focused on Puumala hantavirus (PUUV) infection in its rodent host, the bank vole (Myodes glareolus). In humans, PUUV is responsible of a mild form of hemorrhagic fever with renal syndrome, nephropathia epidemica (NE). The severity of NE is associated with an over-production of TNF-α. By contrast, PUUV infection in bank vole is chronic and asymptomatic. It is likely that different coevolutionary histories between PUUV and its hosts could lead to different balances of resistance/tolerance to PUUV infection, at least partly mediated by variable production levels of TNF-α. We investigated the hypothesis that bank voles from PUUV endemic areas should exhibit higher levels of tolerance, i.e. lower levels of TNF-α production, than bank voles from areas where PUUV prevalence is low. For this purpose, we analysed variations of Tnf-α gene expression and promoter sequences among European populations of bank voles. Our results revealed an absence of up-regulation of Tnf-α gene expression in PUUV infected bank voles and significant differences in Tnf-α gene expression level with regard to PUUV endemicity. These results corroborated the hypothesis of different balances of tolerance/resistance to PUUV. Two single-nucleotide polymorphism genotypes within the Tnf-α promoter (-302 GG/GG and -296 A/A) were associated with higher Tnf-α gene expression and were more frequent in non-endemic areas. This study emphasized the potential influence of selection acting on TNF-α production and mediating a tolerance/resistance balance to PUUV in bank voles. Further investigations, including the role of phenotypic plasticity and parasite communities on Tnf-α expression levels, should provide important keys to understand the prevalence of PUUV over Europe.
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Affiliation(s)
- Emmanuel Guivier
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro), Campus International de Baillarguet, CS 30016, Montferrier-sur-Lez Cedex, France.
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29
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Guivier E, Galan M, Malé PJG, Kallio ER, Voutilainen L, Henttonen H, Olsson GE, Lundkvist A, Tersago K, Augot D, Cosson JF, Charbonnel N. Associations between MHC genes and Puumala virus infection in Myodes glareolus are detected in wild populations, but not from experimental infection data. J Gen Virol 2010; 91:2507-12. [PMID: 20573856 DOI: 10.1099/vir.0.021600-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We analysed the influence of MHC class II Dqa and Drb genes on Puumala virus (PUUV) infection in bank voles (Myodes glareolus). We considered voles sampled in five European localities or derived from a previous experiment that showed variable infection success of PUUV. The genetic variation observed in the Dqa and Drb genes was assessed by using single-strand conformation polymorphism and pyrosequencing methods, respectively. Patterns were compared with those obtained from 13 microsatellites. We revealed significant genetic differentiation between PUUV-seronegative and -seropositive bank voles sampled in wild populations, at the Drb gene only. The absence of genetic differentiation observed at neutral microsatellites confirmed the important role of selective pressures in shaping these Drb patterns. Also, we found no significant associations between infection success and MHC alleles among laboratory-colonized bank voles, which is explained by a loss of genetic variability that occurred during the captivity of these voles.
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Affiliation(s)
- Emmanuel Guivier
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro), Campus international de Baillarguet, CS 30016, F-34988 Montferrier-sur-Lez cedex, France
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30
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Deter J, Galan M, Charbonnel N, Cosson JF. Characterization and PCR multiplexing of polymorphic microsatellite loci in the whipworm Trichuris arvicolae, parasite of arvicoline rodents and their cross-species utilization in T. muris, parasite of murines. Mol Biochem Parasitol 2009; 167:144-6. [PMID: 19465060 DOI: 10.1016/j.molbiopara.2009.05.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Revised: 05/12/2009] [Accepted: 05/13/2009] [Indexed: 11/25/2022]
Abstract
Trichuris arvicolae and T. muris are gastro-intestinal nematodes of respectively arvicoline and murine rodents. We aim to investigate the ecology of these Trichuris species using population genetics. We sampled nematodes from rodents trapped in the East of France. After confirming the species identification of the nematodes using ITS1-5.8S-ITS2 ribosomal DNA sequences, we isolated and characterized twelve dinucleotide microsatellite loci in T. arvicolae. A multiplex panel was developed. Application to a set of 30 individuals allowed clear and easy characterization of allele sizes. The number of alleles ranged from 2 to 6 per locus with observed heterozygosities ranging from 0 to 0.93. A test on eleven T. muris revealed that eight loci among twelve amplified, and five were polymorphic. These sets of microsatellite loci provide high throughput capacity for population genetic studies.
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Affiliation(s)
- J Deter
- INRA-EFPA, Centre de Biologie et de Gestion des Populations CBGP, Campus International de Baillarguet, CS 30016, 34988 Montferrier-sur-Lez Cedex, France
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31
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Rudá M, Ziak D, Gauffre B, Zima J, Martínková N. Comprehensive cross-amplification of microsatellite multiplex sets across the rodent genus Microtus. Mol Ecol Resour 2009; 9:974-8. [PMID: 21564810 DOI: 10.1111/j.1755-0998.2009.02521.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We developed four multiplex panels comprising 19 microsatellite loci and tested their amplification in 21 rodent species important for agricultural and conservation management (Microtus, Arvicola, Chionomys). On average, 17.6 loci amplified per species. Number of alleles ranged from 1 to 19 per locus. We report an additional locus polymorphic in 15 vole species.
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Affiliation(s)
- M Rudá
- Institute of Vertebrate Biology, Academy of Science of the Czech Republic, v.v.i., Květná 8, 603 65 Brno, Czech Republic Department of Zoology, Faculty of Natural Sciences, Comenius University, Mlynská dolina B2, 842 15 Bratislava, Slovakia CBGP-INRA, Campus International de Baillarguet, CS 30016, 34988 Montferrier-sur-Lez Cedex, France
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