Serveur d'exploration sur la COVID en France

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Cluster of Coronavirus Disease 2019 (COVID-19) in the French Alps, February 2020.

Identifieur interne : 001314 ( Main/Exploration ); précédent : 001313; suivant : 001315

Cluster of Coronavirus Disease 2019 (COVID-19) in the French Alps, February 2020.

Auteurs : Kostas Danis [France] ; Olivier Epaulard [France] ; Thomas Bénet [France] ; Alexandre Gaymard [France] ; Séphora Campoy [France] ; Elisabeth Botelho-Nevers [France] ; Maude Bouscambert-Duchamp [France] ; Guillaume Spaccaferri [France] ; Florence Ader [France] ; Alexandra Mailles [France] ; Zoubida Boudalaa [France] ; Violaine Tolsma [France] ; Julien Berra [France] ; Sophie Vaux [France] ; Emmanuel Forestier [France] ; Caroline Landelle [France] ; Erica Fougere [France] ; Alexandra Thabuis [France] ; Philippe Berthelot [France] ; Raphael Veil [France] ; Daniel Levy-Bruhl [France] ; Christian Chidiac [France] ; Bruno Lina [France] ; Bruno Coignard [France] ; Christine Saura [France]

Source :

RBID : pubmed:32277759

Descripteurs français

English descriptors

Abstract

BACKGROUND

On 7 February 2020, French Health authorities were informed of a confirmed case of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in an Englishman infected in Singapore who had recently stayed in a chalet in the French Alps. We conducted an investigation to identify secondary cases and interrupt transmission.

METHODS

We defined as a confirmed case a person linked to the chalet with a positive reverse-transcription polymerase chain reaction sample for SARS-CoV-2.

RESULTS

The index case stayed 4 days in the chalet with 10 English tourists and a family of 5 French residents; SARS-CoV-2 was detected in 5 individuals in France, 6 in England (including the index case), and 1 in Spain (overall attack rate in the chalet: 75%). One pediatric case, with picornavirus and influenza A coinfection, visited 3 different schools while symptomatic. One case was asymptomatic, with similar viral load as that of a symptomatic case. Seven days after the first cases were diagnosed, 1 tertiary case was detected in a symptomatic patient with from the chalet a positive endotracheal aspirate; all previous and concurrent nasopharyngeal specimens were negative. Additionally, 172 contacts were monitored; all contacts tested for SARS-CoV-2 (N = 73) were negative.

CONCLUSIONS

The occurrence in this cluster of 1 asymptomatic case with similar viral load as a symptomatic patient suggests transmission potential of asymptomatic individuals. The fact that an infected child did not transmit the disease despite close interactions within schools suggests potential different transmission dynamics in children. Finally, the dissociation between upper and lower respiratory tract results underscores the need for close monitoring of the clinical evolution of suspected cases of coronavirus disease 2019.


DOI: 10.1093/cid/ciaa424
PubMed: 32277759
PubMed Central: PMC7184384


Affiliations:


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<name sortKey="Benet, Thomas" sort="Benet, Thomas" uniqKey="Benet T" first="Thomas" last="Bénet">Thomas Bénet</name>
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<name sortKey="Botelho Nevers, Elisabeth" sort="Botelho Nevers, Elisabeth" uniqKey="Botelho Nevers E" first="Elisabeth" last="Botelho-Nevers">Elisabeth Botelho-Nevers</name>
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<name sortKey="Bouscambert Duchamp, Maude" sort="Bouscambert Duchamp, Maude" uniqKey="Bouscambert Duchamp M" first="Maude" last="Bouscambert-Duchamp">Maude Bouscambert-Duchamp</name>
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<name sortKey="Spaccaferri, Guillaume" sort="Spaccaferri, Guillaume" uniqKey="Spaccaferri G" first="Guillaume" last="Spaccaferri">Guillaume Spaccaferri</name>
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<name sortKey="Ader, Florence" sort="Ader, Florence" uniqKey="Ader F" first="Florence" last="Ader">Florence Ader</name>
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<name sortKey="Mailles, Alexandra" sort="Mailles, Alexandra" uniqKey="Mailles A" first="Alexandra" last="Mailles">Alexandra Mailles</name>
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<name sortKey="Boudalaa, Zoubida" sort="Boudalaa, Zoubida" uniqKey="Boudalaa Z" first="Zoubida" last="Boudalaa">Zoubida Boudalaa</name>
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<name sortKey="Tolsma, Violaine" sort="Tolsma, Violaine" uniqKey="Tolsma V" first="Violaine" last="Tolsma">Violaine Tolsma</name>
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<name sortKey="Berra, Julien" sort="Berra, Julien" uniqKey="Berra J" first="Julien" last="Berra">Julien Berra</name>
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<name sortKey="Vaux, Sophie" sort="Vaux, Sophie" uniqKey="Vaux S" first="Sophie" last="Vaux">Sophie Vaux</name>
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<name sortKey="Forestier, Emmanuel" sort="Forestier, Emmanuel" uniqKey="Forestier E" first="Emmanuel" last="Forestier">Emmanuel Forestier</name>
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<name sortKey="Landelle, Caroline" sort="Landelle, Caroline" uniqKey="Landelle C" first="Caroline" last="Landelle">Caroline Landelle</name>
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<name sortKey="Fougere, Erica" sort="Fougere, Erica" uniqKey="Fougere E" first="Erica" last="Fougere">Erica Fougere</name>
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<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
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<name sortKey="Thabuis, Alexandra" sort="Thabuis, Alexandra" uniqKey="Thabuis A" first="Alexandra" last="Thabuis">Alexandra Thabuis</name>
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<name sortKey="Berthelot, Philippe" sort="Berthelot, Philippe" uniqKey="Berthelot P" first="Philippe" last="Berthelot">Philippe Berthelot</name>
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<nlm:affiliation>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne, France.</nlm:affiliation>
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<wicri:regionArea>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne</wicri:regionArea>
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<name sortKey="Veil, Raphael" sort="Veil, Raphael" uniqKey="Veil R" first="Raphael" last="Veil">Raphael Veil</name>
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<nlm:affiliation>Public Health Emergency Operations Center, French Ministry of Health, Paris, France.</nlm:affiliation>
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<wicri:regionArea>Public Health Emergency Operations Center, French Ministry of Health, Paris</wicri:regionArea>
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<region type="region">Île-de-France</region>
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<author>
<name sortKey="Levy Bruhl, Daniel" sort="Levy Bruhl, Daniel" uniqKey="Levy Bruhl D" first="Daniel" last="Levy-Bruhl">Daniel Levy-Bruhl</name>
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<name sortKey="Chidiac, Christian" sort="Chidiac, Christian" uniqKey="Chidiac C" first="Christian" last="Chidiac">Christian Chidiac</name>
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<nlm:affiliation>Infectious and Tropical Disease Department, Croix-Rousse Hospital, University Hospital of Lyon, Lyon, France.</nlm:affiliation>
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<nlm:affiliation>Maladies Infectieuses et Tropicales, Université Claude Bernard Lyon 1 (UCBL1), Unité de formation et de recherche (UFR) Lyon Sud-Charles Mérieux, Lyon, France.</nlm:affiliation>
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<name sortKey="Lina, Bruno" sort="Lina, Bruno" uniqKey="Lina B" first="Bruno" last="Lina">Bruno Lina</name>
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<nlm:affiliation>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon</wicri:regionArea>
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<author>
<name sortKey="Coignard, Bruno" sort="Coignard, Bruno" uniqKey="Coignard B" first="Bruno" last="Coignard">Bruno Coignard</name>
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<nlm:affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice</wicri:regionArea>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
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<author>
<name sortKey="Saura, Christine" sort="Saura, Christine" uniqKey="Saura C" first="Christine" last="Saura">Christine Saura</name>
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<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
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<title xml:lang="en">Cluster of Coronavirus Disease 2019 (COVID-19) in the French Alps, February 2020.</title>
<author>
<name sortKey="Danis, Kostas" sort="Danis, Kostas" uniqKey="Danis K" first="Kostas" last="Danis">Kostas Danis</name>
<affiliation wicri:level="1">
<nlm:affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice</wicri:regionArea>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Epaulard, Olivier" sort="Epaulard, Olivier" uniqKey="Epaulard O" first="Olivier" last="Epaulard">Olivier Epaulard</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious Diseases Department, Centre Hospitalier Universitaire Grenoble Alpes, Grenoble, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious Diseases Department, Centre Hospitalier Universitaire Grenoble Alpes, Grenoble</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Grenoble</settlement>
</placeName>
</affiliation>
<affiliation wicri:level="4">
<nlm:affiliation>Fédération d'infectiologie multidisciplinaire de l'Arc Alpin, Université Grenoble Alpes, Grenoble, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Fédération d'infectiologie multidisciplinaire de l'Arc Alpin, Université Grenoble Alpes, Grenoble</wicri:regionArea>
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<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Grenoble</settlement>
</placeName>
<orgName type="university">Université Grenoble-Alpes</orgName>
</affiliation>
<affiliation wicri:level="3">
<nlm:affiliation>Unité Mixte de Recherche 5075 (UMR 5075), Institut de biologie structurale, Grenoble, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Unité Mixte de Recherche 5075 (UMR 5075), Institut de biologie structurale, Grenoble</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Grenoble</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Benet, Thomas" sort="Benet, Thomas" uniqKey="Benet T" first="Thomas" last="Bénet">Thomas Bénet</name>
<affiliation wicri:level="3">
<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Gaymard, Alexandre" sort="Gaymard, Alexandre" uniqKey="Gaymard A" first="Alexandre" last="Gaymard">Alexandre Gaymard</name>
<affiliation wicri:level="3">
<nlm:affiliation>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Campoy, Sephora" sort="Campoy, Sephora" uniqKey="Campoy S" first="Séphora" last="Campoy">Séphora Campoy</name>
<affiliation wicri:level="3">
<nlm:affiliation>Regional Health Agency of Auvergne Rhône Alpes, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Regional Health Agency of Auvergne Rhône Alpes, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Botelho Nevers, Elisabeth" sort="Botelho Nevers, Elisabeth" uniqKey="Botelho Nevers E" first="Elisabeth" last="Botelho-Nevers">Elisabeth Botelho-Nevers</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious Diseases Department, University Hospital of Saint-Etienne, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious Diseases Department, University Hospital of Saint-Etienne, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
<affiliation wicri:level="1">
<nlm:affiliation>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne</wicri:regionArea>
<wicri:noRegion>St-Etienne</wicri:noRegion>
<wicri:noRegion>St-Etienne</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Bouscambert Duchamp, Maude" sort="Bouscambert Duchamp, Maude" uniqKey="Bouscambert Duchamp M" first="Maude" last="Bouscambert-Duchamp">Maude Bouscambert-Duchamp</name>
<affiliation wicri:level="3">
<nlm:affiliation>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Spaccaferri, Guillaume" sort="Spaccaferri, Guillaume" uniqKey="Spaccaferri G" first="Guillaume" last="Spaccaferri">Guillaume Spaccaferri</name>
<affiliation wicri:level="3">
<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Ader, Florence" sort="Ader, Florence" uniqKey="Ader F" first="Florence" last="Ader">Florence Ader</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious and Tropical Disease Department, Croix-Rousse Hospital, University Hospital of Lyon, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious and Tropical Disease Department, Croix-Rousse Hospital, University Hospital of Lyon, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Mailles, Alexandra" sort="Mailles, Alexandra" uniqKey="Mailles A" first="Alexandra" last="Mailles">Alexandra Mailles</name>
<affiliation wicri:level="1">
<nlm:affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice</wicri:regionArea>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Boudalaa, Zoubida" sort="Boudalaa, Zoubida" uniqKey="Boudalaa Z" first="Zoubida" last="Boudalaa">Zoubida Boudalaa</name>
<affiliation wicri:level="3">
<nlm:affiliation>Regional Health Agency of Auvergne Rhône Alpes, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Regional Health Agency of Auvergne Rhône Alpes, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Tolsma, Violaine" sort="Tolsma, Violaine" uniqKey="Tolsma V" first="Violaine" last="Tolsma">Violaine Tolsma</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious Diseases Unit, Centre Hospitalier Annecy Genevois, Annecy, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious Diseases Unit, Centre Hospitalier Annecy Genevois, Annecy</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Annecy</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Berra, Julien" sort="Berra, Julien" uniqKey="Berra J" first="Julien" last="Berra">Julien Berra</name>
<affiliation wicri:level="3">
<nlm:affiliation>Regional Health Agency of Auvergne Rhône Alpes, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Regional Health Agency of Auvergne Rhône Alpes, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Vaux, Sophie" sort="Vaux, Sophie" uniqKey="Vaux S" first="Sophie" last="Vaux">Sophie Vaux</name>
<affiliation wicri:level="1">
<nlm:affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice</wicri:regionArea>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Forestier, Emmanuel" sort="Forestier, Emmanuel" uniqKey="Forestier E" first="Emmanuel" last="Forestier">Emmanuel Forestier</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious Disease Department, Centre Hospitalier Metropole Savoie, Chambery, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious Disease Department, Centre Hospitalier Metropole Savoie, Chambery</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Chambéry</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Landelle, Caroline" sort="Landelle, Caroline" uniqKey="Landelle C" first="Caroline" last="Landelle">Caroline Landelle</name>
<affiliation wicri:level="3">
<nlm:affiliation>Service d'Hygiène Hospitalière et de Gestion des Risques, Centre Hospitalier Universitaire Grenoble Alpes, Grenoble, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Service d'Hygiène Hospitalière et de Gestion des Risques, Centre Hospitalier Universitaire Grenoble Alpes, Grenoble</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Grenoble</settlement>
</placeName>
</affiliation>
<affiliation wicri:level="4">
<nlm:affiliation>Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques, Applications, Grenoble, Unité Mixte de Recherche 5525 (TIMC-IMAG UMR5525), CNRS, Université Grenoble Alpes, Grenoble, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques, Applications, Grenoble, Unité Mixte de Recherche 5525 (TIMC-IMAG UMR5525), CNRS, Université Grenoble Alpes, Grenoble</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Grenoble</settlement>
</placeName>
<orgName type="university">Université Grenoble-Alpes</orgName>
</affiliation>
</author>
<author>
<name sortKey="Fougere, Erica" sort="Fougere, Erica" uniqKey="Fougere E" first="Erica" last="Fougere">Erica Fougere</name>
<affiliation wicri:level="3">
<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Thabuis, Alexandra" sort="Thabuis, Alexandra" uniqKey="Thabuis A" first="Alexandra" last="Thabuis">Alexandra Thabuis</name>
<affiliation wicri:level="3">
<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Berthelot, Philippe" sort="Berthelot, Philippe" uniqKey="Berthelot P" first="Philippe" last="Berthelot">Philippe Berthelot</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious Diseases Department, University Hospital of Saint-Etienne, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious Diseases Department, University Hospital of Saint-Etienne, Lyon</wicri:regionArea>
<placeName>
<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
</affiliation>
<affiliation wicri:level="1">
<nlm:affiliation>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne</wicri:regionArea>
<wicri:noRegion>St-Etienne</wicri:noRegion>
<wicri:noRegion>St-Etienne</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Veil, Raphael" sort="Veil, Raphael" uniqKey="Veil R" first="Raphael" last="Veil">Raphael Veil</name>
<affiliation wicri:level="3">
<nlm:affiliation>Public Health Emergency Operations Center, French Ministry of Health, Paris, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Public Health Emergency Operations Center, French Ministry of Health, Paris</wicri:regionArea>
<placeName>
<region type="region">Île-de-France</region>
<region type="old region">Île-de-France</region>
<settlement type="city">Paris</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Levy Bruhl, Daniel" sort="Levy Bruhl, Daniel" uniqKey="Levy Bruhl D" first="Daniel" last="Levy-Bruhl">Daniel Levy-Bruhl</name>
<affiliation wicri:level="1">
<nlm:affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice</wicri:regionArea>
<wicri:noRegion>Saint-Maurice</wicri:noRegion>
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</affiliation>
</author>
<author>
<name sortKey="Chidiac, Christian" sort="Chidiac, Christian" uniqKey="Chidiac C" first="Christian" last="Chidiac">Christian Chidiac</name>
<affiliation wicri:level="3">
<nlm:affiliation>Infectious and Tropical Disease Department, Croix-Rousse Hospital, University Hospital of Lyon, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Infectious and Tropical Disease Department, Croix-Rousse Hospital, University Hospital of Lyon, Lyon</wicri:regionArea>
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<region type="region">Auvergne-Rhône-Alpes</region>
<region type="old region">Rhône-Alpes</region>
<settlement type="city">Lyon</settlement>
</placeName>
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<affiliation wicri:level="4">
<nlm:affiliation>Maladies Infectieuses et Tropicales, Université Claude Bernard Lyon 1 (UCBL1), Unité de formation et de recherche (UFR) Lyon Sud-Charles Mérieux, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Maladies Infectieuses et Tropicales, Université Claude Bernard Lyon 1 (UCBL1), Unité de formation et de recherche (UFR) Lyon Sud-Charles Mérieux, Lyon</wicri:regionArea>
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<region type="region">Auvergne-Rhône-Alpes</region>
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</placeName>
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</author>
<author>
<name sortKey="Lina, Bruno" sort="Lina, Bruno" uniqKey="Lina B" first="Bruno" last="Lina">Bruno Lina</name>
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<nlm:affiliation>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon</wicri:regionArea>
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<name sortKey="Coignard, Bruno" sort="Coignard, Bruno" uniqKey="Coignard B" first="Bruno" last="Coignard">Bruno Coignard</name>
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<nlm:affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
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<name sortKey="Saura, Christine" sort="Saura, Christine" uniqKey="Saura C" first="Christine" last="Saura">Christine Saura</name>
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<nlm:affiliation>French National Public Health Agency, Auvergne-Rhône-Alpes Regional Office, Lyon, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
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<series>
<title level="j">Clinical infectious diseases : an official publication of the Infectious Diseases Society of America</title>
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<date when="2020" type="published">2020</date>
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<term>Aged (MeSH)</term>
<term>Aged, 80 and over (MeSH)</term>
<term>Betacoronavirus (isolation & purification)</term>
<term>Cluster Analysis (MeSH)</term>
<term>Coronavirus Infections (virology)</term>
<term>Female (MeSH)</term>
<term>France (MeSH)</term>
<term>Humans (MeSH)</term>
<term>Middle Aged (MeSH)</term>
<term>Pandemics (MeSH)</term>
<term>Pneumonia, Viral (virology)</term>
<term>Retrospective Studies (MeSH)</term>
<term>Serologic Tests (methods)</term>
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<term>Adulte d'âge moyen (MeSH)</term>
<term>Analyse de regroupements (MeSH)</term>
<term>Betacoronavirus (isolement et purification)</term>
<term>Femelle (MeSH)</term>
<term>France (MeSH)</term>
<term>Humains (MeSH)</term>
<term>Infections à coronavirus (virologie)</term>
<term>Pandémies (MeSH)</term>
<term>Pneumopathie virale (virologie)</term>
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<div type="abstract" xml:lang="en">
<p>
<b>BACKGROUND</b>
</p>
<p>On 7 February 2020, French Health authorities were informed of a confirmed case of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in an Englishman infected in Singapore who had recently stayed in a chalet in the French Alps. We conducted an investigation to identify secondary cases and interrupt transmission.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>METHODS</b>
</p>
<p>We defined as a confirmed case a person linked to the chalet with a positive reverse-transcription polymerase chain reaction sample for SARS-CoV-2.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>RESULTS</b>
</p>
<p>The index case stayed 4 days in the chalet with 10 English tourists and a family of 5 French residents; SARS-CoV-2 was detected in 5 individuals in France, 6 in England (including the index case), and 1 in Spain (overall attack rate in the chalet: 75%). One pediatric case, with picornavirus and influenza A coinfection, visited 3 different schools while symptomatic. One case was asymptomatic, with similar viral load as that of a symptomatic case. Seven days after the first cases were diagnosed, 1 tertiary case was detected in a symptomatic patient with from the chalet a positive endotracheal aspirate; all previous and concurrent nasopharyngeal specimens were negative. Additionally, 172 contacts were monitored; all contacts tested for SARS-CoV-2 (N = 73) were negative.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>CONCLUSIONS</b>
</p>
<p>The occurrence in this cluster of 1 asymptomatic case with similar viral load as a symptomatic patient suggests transmission potential of asymptomatic individuals. The fact that an infected child did not transmit the disease despite close interactions within schools suggests potential different transmission dynamics in children. Finally, the dissociation between upper and lower respiratory tract results underscores the need for close monitoring of the clinical evolution of suspected cases of coronavirus disease 2019.</p>
</div>
</front>
</TEI>
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<PMID Version="1">32277759</PMID>
<DateCompleted>
<Year>2020</Year>
<Month>08</Month>
<Day>10</Day>
</DateCompleted>
<DateRevised>
<Year>2020</Year>
<Month>08</Month>
<Day>10</Day>
</DateRevised>
<Article PubModel="Print">
<Journal>
<ISSN IssnType="Electronic">1537-6591</ISSN>
<JournalIssue CitedMedium="Internet">
<Volume>71</Volume>
<Issue>15</Issue>
<PubDate>
<Year>2020</Year>
<Month>07</Month>
<Day>28</Day>
</PubDate>
</JournalIssue>
<Title>Clinical infectious diseases : an official publication of the Infectious Diseases Society of America</Title>
<ISOAbbreviation>Clin. Infect. Dis.</ISOAbbreviation>
</Journal>
<ArticleTitle>Cluster of Coronavirus Disease 2019 (COVID-19) in the French Alps, February 2020.</ArticleTitle>
<Pagination>
<MedlinePgn>825-832</MedlinePgn>
</Pagination>
<ELocationID EIdType="doi" ValidYN="Y">10.1093/cid/ciaa424</ELocationID>
<Abstract>
<AbstractText Label="BACKGROUND">On 7 February 2020, French Health authorities were informed of a confirmed case of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in an Englishman infected in Singapore who had recently stayed in a chalet in the French Alps. We conducted an investigation to identify secondary cases and interrupt transmission.</AbstractText>
<AbstractText Label="METHODS">We defined as a confirmed case a person linked to the chalet with a positive reverse-transcription polymerase chain reaction sample for SARS-CoV-2.</AbstractText>
<AbstractText Label="RESULTS">The index case stayed 4 days in the chalet with 10 English tourists and a family of 5 French residents; SARS-CoV-2 was detected in 5 individuals in France, 6 in England (including the index case), and 1 in Spain (overall attack rate in the chalet: 75%). One pediatric case, with picornavirus and influenza A coinfection, visited 3 different schools while symptomatic. One case was asymptomatic, with similar viral load as that of a symptomatic case. Seven days after the first cases were diagnosed, 1 tertiary case was detected in a symptomatic patient with from the chalet a positive endotracheal aspirate; all previous and concurrent nasopharyngeal specimens were negative. Additionally, 172 contacts were monitored; all contacts tested for SARS-CoV-2 (N = 73) were negative.</AbstractText>
<AbstractText Label="CONCLUSIONS">The occurrence in this cluster of 1 asymptomatic case with similar viral load as a symptomatic patient suggests transmission potential of asymptomatic individuals. The fact that an infected child did not transmit the disease despite close interactions within schools suggests potential different transmission dynamics in children. Finally, the dissociation between upper and lower respiratory tract results underscores the need for close monitoring of the clinical evolution of suspected cases of coronavirus disease 2019.</AbstractText>
<CopyrightInformation>© The Author(s) 2020. Published by Oxford University Press for the Infectious Diseases Society of America.</CopyrightInformation>
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<LastName>Danis</LastName>
<ForeName>Kostas</ForeName>
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<Affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</Affiliation>
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<ForeName>Olivier</ForeName>
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<AffiliationInfo>
<Affiliation>Infectious Diseases Department, Centre Hospitalier Universitaire Grenoble Alpes, Grenoble, France.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Fédération d'infectiologie multidisciplinaire de l'Arc Alpin, Université Grenoble Alpes, Grenoble, France.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Unité Mixte de Recherche 5075 (UMR 5075), Institut de biologie structurale, Grenoble, France.</Affiliation>
</AffiliationInfo>
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</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Groupe Immunité des Muqueuses et Agents Pathogènes, Université Jean Monnet, Université de Lyon, St-Etienne, France.</Affiliation>
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</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques, Applications, Grenoble, Unité Mixte de Recherche 5525 (TIMC-IMAG UMR5525), CNRS, Université Grenoble Alpes, Grenoble, France.</Affiliation>
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<AffiliationInfo>
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<LastName>Levy-Bruhl</LastName>
<ForeName>Daniel</ForeName>
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<Affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</Affiliation>
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<LastName>Chidiac</LastName>
<ForeName>Christian</ForeName>
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<Affiliation>Infectious and Tropical Disease Department, Croix-Rousse Hospital, University Hospital of Lyon, Lyon, France.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Maladies Infectieuses et Tropicales, Université Claude Bernard Lyon 1 (UCBL1), Unité de formation et de recherche (UFR) Lyon Sud-Charles Mérieux, Lyon, France.</Affiliation>
</AffiliationInfo>
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<LastName>Lina</LastName>
<ForeName>Bruno</ForeName>
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<AffiliationInfo>
<Affiliation>Department of Virology, Infective Agents Institute, National Reference Center for Respiratory Viruses North Hospital Network, Lyon, France.</Affiliation>
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<LastName>Coignard</LastName>
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<Affiliation>French National Public Health Agency, Department of Infectious Diseases, Saint-Maurice, France.</Affiliation>
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<LastName>Saura</LastName>
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<SupplMeshName Type="Organism" UI="C000656484">severe acute respiratory syndrome coronavirus 2</SupplMeshName>
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<MeshHeading>
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<ForeName>Cécile</ForeName>
<Initials>C</Initials>
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<LastName>Ayouni</LastName>
<ForeName>Stéphane</ForeName>
<Initials>S</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>Vincent</LastName>
<ForeName>Mireille</ForeName>
<Initials>M</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>de Epidemiología</LastName>
<ForeName>Servicio</ForeName>
<Initials>S</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>General de Salud Pública Del Gover Balear</LastName>
<ForeName>Dirección</ForeName>
<Initials>D</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>Masserey Spicher</LastName>
<ForeName>Virginie</ForeName>
<Initials>V</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>Bourquin</LastName>
<ForeName>Catherine</ForeName>
<Initials>C</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>Stoll</LastName>
<ForeName>Jeanine</ForeName>
<Initials>J</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>Chaud</LastName>
<ForeName>Pascal</ForeName>
<Initials>P</Initials>
</Investigator>
<Investigator ValidYN="Y">
<LastName>Mounayar</LastName>
<ForeName>Anne-Laure</ForeName>
<Initials>AL</Initials>
</Investigator>
</InvestigatorList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2020</Year>
<Month>03</Month>
<Day>05</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2020</Year>
<Month>04</Month>
<Day>09</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2020</Year>
<Month>4</Month>
<Day>12</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2020</Year>
<Month>8</Month>
<Day>11</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2020</Year>
<Month>4</Month>
<Day>12</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">32277759</ArticleId>
<ArticleId IdType="pii">5819060</ArticleId>
<ArticleId IdType="doi">10.1093/cid/ciaa424</ArticleId>
<ArticleId IdType="pmc">PMC7184384</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>France</li>
</country>
<region>
<li>Auvergne-Rhône-Alpes</li>
<li>Rhône-Alpes</li>
<li>Île-de-France</li>
</region>
<settlement>
<li>Annecy</li>
<li>Chambéry</li>
<li>Grenoble</li>
<li>Lyon</li>
<li>Paris</li>
</settlement>
<orgName>
<li>Université Claude Bernard Lyon 1</li>
<li>Université Grenoble-Alpes</li>
</orgName>
</list>
<tree>
<country name="France">
<noRegion>
<name sortKey="Danis, Kostas" sort="Danis, Kostas" uniqKey="Danis K" first="Kostas" last="Danis">Kostas Danis</name>
</noRegion>
<name sortKey="Ader, Florence" sort="Ader, Florence" uniqKey="Ader F" first="Florence" last="Ader">Florence Ader</name>
<name sortKey="Benet, Thomas" sort="Benet, Thomas" uniqKey="Benet T" first="Thomas" last="Bénet">Thomas Bénet</name>
<name sortKey="Berra, Julien" sort="Berra, Julien" uniqKey="Berra J" first="Julien" last="Berra">Julien Berra</name>
<name sortKey="Berthelot, Philippe" sort="Berthelot, Philippe" uniqKey="Berthelot P" first="Philippe" last="Berthelot">Philippe Berthelot</name>
<name sortKey="Berthelot, Philippe" sort="Berthelot, Philippe" uniqKey="Berthelot P" first="Philippe" last="Berthelot">Philippe Berthelot</name>
<name sortKey="Botelho Nevers, Elisabeth" sort="Botelho Nevers, Elisabeth" uniqKey="Botelho Nevers E" first="Elisabeth" last="Botelho-Nevers">Elisabeth Botelho-Nevers</name>
<name sortKey="Botelho Nevers, Elisabeth" sort="Botelho Nevers, Elisabeth" uniqKey="Botelho Nevers E" first="Elisabeth" last="Botelho-Nevers">Elisabeth Botelho-Nevers</name>
<name sortKey="Boudalaa, Zoubida" sort="Boudalaa, Zoubida" uniqKey="Boudalaa Z" first="Zoubida" last="Boudalaa">Zoubida Boudalaa</name>
<name sortKey="Bouscambert Duchamp, Maude" sort="Bouscambert Duchamp, Maude" uniqKey="Bouscambert Duchamp M" first="Maude" last="Bouscambert-Duchamp">Maude Bouscambert-Duchamp</name>
<name sortKey="Campoy, Sephora" sort="Campoy, Sephora" uniqKey="Campoy S" first="Séphora" last="Campoy">Séphora Campoy</name>
<name sortKey="Chidiac, Christian" sort="Chidiac, Christian" uniqKey="Chidiac C" first="Christian" last="Chidiac">Christian Chidiac</name>
<name sortKey="Chidiac, Christian" sort="Chidiac, Christian" uniqKey="Chidiac C" first="Christian" last="Chidiac">Christian Chidiac</name>
<name sortKey="Coignard, Bruno" sort="Coignard, Bruno" uniqKey="Coignard B" first="Bruno" last="Coignard">Bruno Coignard</name>
<name sortKey="Epaulard, Olivier" sort="Epaulard, Olivier" uniqKey="Epaulard O" first="Olivier" last="Epaulard">Olivier Epaulard</name>
<name sortKey="Epaulard, Olivier" sort="Epaulard, Olivier" uniqKey="Epaulard O" first="Olivier" last="Epaulard">Olivier Epaulard</name>
<name sortKey="Epaulard, Olivier" sort="Epaulard, Olivier" uniqKey="Epaulard O" first="Olivier" last="Epaulard">Olivier Epaulard</name>
<name sortKey="Forestier, Emmanuel" sort="Forestier, Emmanuel" uniqKey="Forestier E" first="Emmanuel" last="Forestier">Emmanuel Forestier</name>
<name sortKey="Fougere, Erica" sort="Fougere, Erica" uniqKey="Fougere E" first="Erica" last="Fougere">Erica Fougere</name>
<name sortKey="Gaymard, Alexandre" sort="Gaymard, Alexandre" uniqKey="Gaymard A" first="Alexandre" last="Gaymard">Alexandre Gaymard</name>
<name sortKey="Landelle, Caroline" sort="Landelle, Caroline" uniqKey="Landelle C" first="Caroline" last="Landelle">Caroline Landelle</name>
<name sortKey="Landelle, Caroline" sort="Landelle, Caroline" uniqKey="Landelle C" first="Caroline" last="Landelle">Caroline Landelle</name>
<name sortKey="Levy Bruhl, Daniel" sort="Levy Bruhl, Daniel" uniqKey="Levy Bruhl D" first="Daniel" last="Levy-Bruhl">Daniel Levy-Bruhl</name>
<name sortKey="Lina, Bruno" sort="Lina, Bruno" uniqKey="Lina B" first="Bruno" last="Lina">Bruno Lina</name>
<name sortKey="Mailles, Alexandra" sort="Mailles, Alexandra" uniqKey="Mailles A" first="Alexandra" last="Mailles">Alexandra Mailles</name>
<name sortKey="Saura, Christine" sort="Saura, Christine" uniqKey="Saura C" first="Christine" last="Saura">Christine Saura</name>
<name sortKey="Spaccaferri, Guillaume" sort="Spaccaferri, Guillaume" uniqKey="Spaccaferri G" first="Guillaume" last="Spaccaferri">Guillaume Spaccaferri</name>
<name sortKey="Thabuis, Alexandra" sort="Thabuis, Alexandra" uniqKey="Thabuis A" first="Alexandra" last="Thabuis">Alexandra Thabuis</name>
<name sortKey="Tolsma, Violaine" sort="Tolsma, Violaine" uniqKey="Tolsma V" first="Violaine" last="Tolsma">Violaine Tolsma</name>
<name sortKey="Vaux, Sophie" sort="Vaux, Sophie" uniqKey="Vaux S" first="Sophie" last="Vaux">Sophie Vaux</name>
<name sortKey="Veil, Raphael" sort="Veil, Raphael" uniqKey="Veil R" first="Raphael" last="Veil">Raphael Veil</name>
</country>
</tree>
</affiliations>
</record>

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