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Séverine Vuilleumier Varisco

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Size and duration of COVID-19 clusters go along with a high SARS-CoV-2 viral load: A spatio-temporal investigation in Vaud state, Switzerland

Stéphane Joost, Séverine Vuilleumier Varisco, Anaïs Laurence Ladoy, Idris Guessous, Onya Opota

To understand the geographical and temporal spread of SARS-CoV-2 during the first documented wave of infection in the state of Vaud, Switzerland, we analyzed clusters of positive cases using the precise residential location of 33,651 individuals tested (RT ...

2021

Indication of spatially random occurrence of Chlamydia-like organisms in Bufo bufo tadpoles from ponds located in the Geneva metropolitan area

Séverine Vuilleumier Varisco, Stéphane Joost, Oliver Michele Selmoni, Elia Vajana, Ivo Widmer

Occurrence of bacteria belonging to the order Chlamydiales was investigated for the first time in common toad (Bufo bufo) tadpole populations collected from 41 ponds in the Geneva metropolitan area, Switzerland. A Chlamydiales-specific real-time PCR was us ...

2019

Indication of spatially random infection of chlamydia-like organisms in Bufo bufo tadpoles from ponds located in the Geneva metropolitan area

Stéphane Joost, Oliver Michele Selmoni, Séverine Vuilleumier Varisco, Estelle Rochat, Elia Vajana, Ivo Widmer, Solange Catherine Gaillard

2018

A genetic reconstruction of the invasion of the calanoid copepod Pseudodiaptomus inopinus across the North American Pacific Coast

Séverine Vuilleumier Varisco, Susanne Petra Pfeifer

2018

Host shift and cospeciation rate estimation from co-phylogenies

Séverine Vuilleumier Varisco

Host shifts can cause novel infectious diseases, and is a key process in diversification. Disentangling the effects of host shift vs. those of cospeciation is non-trivial as both can result in phylogenic congruence. We develop a new framework based on netw ...

Wiley2017

Ecological strategies in stable and disturbed environments depend on species specialisation

Séverine Vuilleumier Varisco

Ecological strategies are integral to understanding species survival in different environments. However, how habitat specialisation is involved in such strategies is not fully understood, particularly in heterogeneous and disturbed environments. Here, we s ...

2016

Contribution of recombination to the evolutionary history of HIV

Séverine Vuilleumier Varisco

Purpose of review: An improved understanding of how recombination affects the evolutionary history of HIV is crucial to understand its current and future evolution. The present review aims to disentangle the manifold effects of recombination on HIV by disc ...

2015

The Genomic Signature of Population Reconnection Following Isolation: From Theory to HIV

Amalio Telenti, Jeffrey David Jensen, Séverine Vuilleumier Varisco

Ease of worldwide travel provides increased opportunities for organisms not only to colonize new environments but also to encounter related but diverged populations. Such events of reconnection and secondary contact of previously isolated populations are w ...

Genetics Society of America2015

On the transition of genetic differentiation from isolation to panmixia: What we can learn from G(ST) and D

Séverine Vuilleumier Varisco

Population genetic differentiation characterizes the repartition of alleles among populations. It is commonly thought that genetic differentiation measures, such as G(ST) and D, should be near zero when allele frequencies are close to their expected value ...

Elsevier2014

Turnover and accumulation of genetic diversity across large time-scale cycles of isolation and connection of populations

Séverine Vuilleumier Varisco

Major climatic and geological events but also population history (secondary contacts) have generated cycles of population isolation and connection of long and short periods. Recent empirical and theoretical studies suggest that fast evolutionary processes ...

2014

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Turnover and accumulation of genetic diversity across large time-scale cycles of isolation and connection of populations

Séverine Vuilleumier Varisco

2014

Size and duration of COVID-19 clusters go along with a high SARS-CoV-2 viral load: A spatio-temporal investigation in Vaud state, Switzerland

Stéphane Joost, Séverine Vuilleumier Varisco, Anaïs Laurence Ladoy, Idris Guessous, Onya Opota

2021

Indication of spatially random occurrence of Chlamydia-like organisms in Bufo bufo tadpoles from ponds located in the Geneva metropolitan area

Séverine Vuilleumier Varisco, Stéphane Joost, Oliver Michele Selmoni, Elia Vajana, Ivo Widmer

2019

Indication of spatially random infection of chlamydia-like organisms in Bufo bufo tadpoles from ponds located in the Geneva metropolitan area

Stéphane Joost, Oliver Michele Selmoni, Séverine Vuilleumier Varisco, Estelle Rochat, Elia Vajana, Ivo Widmer, Solange Catherine Gaillard

2018

A genetic reconstruction of the invasion of the calanoid copepod Pseudodiaptomus inopinus across the North American Pacific Coast

Séverine Vuilleumier Varisco, Susanne Petra Pfeifer

2018