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Maataoui N, Mayet A, Duron S, Delacour H, Mentré F, Laouenan C, Desvillechabrol D, Cokelaer T, Meynard JB, Ducher A, Andremont A, Armand-Lefèvre L, Mérens A. High acquisition rate of extended-spectrum β-lactamase-producing Enterobacteriaceae among French military personnel on mission abroad, without evidence of inter-individual transmission. Clin Microbiol Infect 2018; 25:631.e1-631.e9. [PMID: 30099136 DOI: 10.1016/j.cmi.2018.07.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/16/2018] [Accepted: 07/29/2018] [Indexed: 01/23/2023]
Abstract
OBJECTIVES Acquisition of extended-spectrum β-lactamase-producing Enterobacteriaceae (ESBL-E) by Europeans travelling individually in high-endemicity countries is common. However, how the different ESBL-E strains circulate in groups of travellers has not been studied. We investigated ESBL-E transmission within several groups of French military personnel serving overseas for 4-6 months. METHODS We conducted a prospective study among French military personnel assigned to Afghanistan, French Guiana or Côte d'Ivoire for 4-6 months. Faecal samples provided by volunteers before leaving and after returning were screened for ESBL-E isolates. ESBL Escherichia coli from each military group was characterized by repetitive element palindromic polymerase chain reaction (rep-PCR) fingerprinting followed, in the Afghanistan group, by whole-genome sequencing (WGS) if similarity was ≥97%. RESULTS Among the 189 volunteers whose samples were negative before departure, 72 (38%) were positive after return. The highest acquisition rates were observed in the Afghanistan (29/33, 88%) and Côte d'Ivoire (39/80, 49%) groups. Acquisition rates on return from French Guiana were much lower (4/76, 5%). WGS of the 20 strains from the Afghanistan group that clustered by rep-PCR identified differences in sequence type, serotype, resistance genes and plasmid replicons. Moreover, single-nucleotide polymorphism (SNP) differences across acquired strains from a given cluster ranged from 30 to 3641, suggesting absence of direct transmission. CONCLUSIONS ESBL-E. coli acquisition was common among military personnel posted overseas. Many strains clustered by rep-PCR but differed by WGS and SNP analysis, suggesting acquisition from common external sources rather than direct person-to-person transmission.
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Affiliation(s)
- N Maataoui
- Laboratoire de Bactériologie, Hôpital Bichat-Claude Bernard, AP-HP, Paris, France; Inserm, IAME, UMR 1137, University of Paris Diderot, Sorbonne Paris Cité, 75018, Paris, France.
| | - A Mayet
- Service de Santé des Armées, Centre d'épidémiologie et de santé publique des armées, Marseille, France; INSERM, IRD, SESSTIM, Sciences Economiques & Sociales de la Santé et Traitement de l'Information Médicale, Université Aix Marseille, Marseille, France
| | - S Duron
- Service de Santé des Armées, Centre d'épidémiologie et de santé publique des armées, Marseille, France; INSERM, IRD, SESSTIM, Sciences Economiques & Sociales de la Santé et Traitement de l'Information Médicale, Université Aix Marseille, Marseille, France
| | - H Delacour
- Laboratoire de Microbiologie, Service de Santé des Armées, Hôpital d'Instruction des Armées Bégin, Saint-Mandé, France; Ecole du Val-de-Grâce, Paris, France
| | - F Mentré
- Inserm, IAME, UMR 1137, University of Paris Diderot, Sorbonne Paris Cité, 75018, Paris, France; Biostatistics Department, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| | - C Laouenan
- Inserm, IAME, UMR 1137, University of Paris Diderot, Sorbonne Paris Cité, 75018, Paris, France; Biostatistics Department, Bichat-Claude Bernard Hospital, AP-HP, Paris, France
| | - D Desvillechabrol
- Institut Pasteur - Bioinformatics and Biostatistics Hub, C3BI, USR 3756 IP CNRS, Paris, France
| | - T Cokelaer
- Institut Pasteur - Bioinformatics and Biostatistics Hub, C3BI, USR 3756 IP CNRS, Paris, France; Institut Pasteur, Biomics Pole, CITECH, Paris, France
| | - J B Meynard
- Service de Santé des Armées, Centre d'épidémiologie et de santé publique des armées, Marseille, France; INSERM, IRD, SESSTIM, Sciences Economiques & Sociales de la Santé et Traitement de l'Information Médicale, Université Aix Marseille, Marseille, France; Ecole du Val-de-Grâce, Paris, France
| | | | - A Andremont
- Inserm, IAME, UMR 1137, University of Paris Diderot, Sorbonne Paris Cité, 75018, Paris, France
| | - L Armand-Lefèvre
- Laboratoire de Bactériologie, Hôpital Bichat-Claude Bernard, AP-HP, Paris, France; Inserm, IAME, UMR 1137, University of Paris Diderot, Sorbonne Paris Cité, 75018, Paris, France
| | - A Mérens
- Laboratoire de Microbiologie, Service de Santé des Armées, Hôpital d'Instruction des Armées Bégin, Saint-Mandé, France; Ecole du Val-de-Grâce, Paris, France
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