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Volume 23, Number 9—September 2017

Research

Real-Time Whole-Genome Sequencing for Surveillance of Listeria monocytogenes, France

Alexandra Moura1, Mathieu Tourdjman1, Alexandre Leclercq1, Estelle Hamelin, Edith Laurent, Nathalie Fredriksen, Dieter Van Cauteren, Hélène Bracq-Dieye, Pierre Thouvenot, Guillaume Vales, Nathalie Tessaud-Rita, Mylène M. Maury, Andreea Alexandru, Alexis Criscuolo, Emmanuel Quevillon, Marie-Pierre Donguy, Vincent Enouf, Henriette de Valk, Sylvain Brisse2, and Marc Lecuit2Comments to Author 
Author affiliations: Institut Pasteur, Paris, France (A. Moura, A. Leclercq, H. Bracq-Dieye, P. Thouvenot, G. Vales, N. Tessaud-Rita, M. Maury, A. Alexandru, A. Criscuolo, E. Quevillon, V. Enouf, S. Brisse, M. Lecuit); Institut National de la Santé et de la Recherche Médicale Unité 1117, Paris (A. Moura, M.M. Maury, M. Lecuit); Santé Publique France, Saint-Maurice, France (M. Tourdjman, E. Laurent, D. Van Cauteren, H. de Valk); Ministry of Agriculture, Agrifood, and Forestry, Paris (E. Hamelin, N. Fredriksen, M.-P. Donguy); Paris Descartes University, Paris (M. Lecuit); Necker-Enfants Malades University Hospital, Paris (M. Lecuit)

Main Article

Table 1

Clusters of PFGE types that triggered epidemiologic investigations for surveillance of Listeria monocytogenes, France*

PFGE alert PFGE type No. human cases No. cgMLST types within PFGE alert Confirmed food source according to PFGE-based investigation
L15/01, L15/06 IIa-260606–260606 7 5 No common source identified, except a specific cheese for 2 cases
L15/02 IVb-210792–210792 8 7 No common source identified, except a specific cheese for 1 case
L15/03 IIa-020707–151007 3 1 NI
L15/04 IIa-010901–020701 3 3 NI
L15/05 IVb-011001–160602 8 8 NI
L15/07 IIb-010107–010107 4 2 Dairy (cheese)
L15/08 IVb-151005–151005 22 18 NI
L15/09 IVb-210792–210792 18 12 No common source identified, except a specific cheese for 4 cases
L15/10 IIb-310801–061006 13 4 Meat (sausage)
L15/11 IVb-011001–160602 17 14 No common source identified, except a specific sausage for 1 case
L15/12 IVb-200792–200792 18 14 NI
L15/13 IVb-270801–050506 6 6 NI
L15/14 IIb-231006–310801 8 5 NI
L15/15 IIa-080507–020507 5 3 NI
L15/16 IIa-010901–020701 6 6 NI
L16/01 IIa-191107–200807 4 1 NI
L16/02 IVb-151005–151005 6 6 NI
L16/03 IVb-151005–111206 4 4 NI
L16/04 IVb-210792–210792 6 5 NI
L16/05 IIa-050207–050207 6 6 NI
L16/06 IVb-270801–050506 3 3 NI
L16/07 IVb-011001–160602 30 11 Dairy (cheese)
L16/08 IIa-260606–260606 3 1 NI
L16/09 IVb-151005–151005 8 8 NI
L16/10 IVb-210792–210792 6 6 NI
L16/11 IIa-271106–271106 4 3 NI
L16/12 IIa-010901–020701 4 4 NI
L16/13 IIa-271106–271106 3 3 NI
L16/14 IVb-210792–210792 7 7 NI
L16/15 IVb-270801–050506 5 5 NI

*cgMLST, core genome multilocus sequence typing; NI, not identified; PFGE, pulsed-field gel electrophoresis.

Main Article

1These authors contributed equally to this article.

2These authors were co-senior authors.

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