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Volume 27, Number 1—January 2021

Listeriosis Caused by Persistence of Listeria monocytogenes Serotype 4b Sequence Type 6 in Cheese Production Environment

Magdalena Nüesch-InderbinenComments to Author , Guido V. Bloemberg, Andrea Müller, Marc J.A. Stevens, Nicole Cernela, Beat Kollöffel, and Roger Stephan
Author affiliations: Institute for Food Safety and Hygiene, Zurich, Switzerland (M. Nüesch-Inderbinen, M.J.A. Stevens, N. Cernela, R. Stephan); National Reference Centre for Enteropathogenic Bacteria and Listeria, Zurich (G.V. Bloemberg, A. Müller); Kantonales Laboratorium der Urkantone, Brunnen, Switzerland (B. Kollöffel)

Main Article


Listeria monocytogenes 4b sequence type 6 cluster type 7448 isolates associated with listeriosis outbreak, Switzerland, 2018–2020*

Isolate ID Date of isolation Origin Source Patient age, y/sex BioSample accession no.
N18–0388 2018 Mar 6 Human Blood 82/F SAMN15325567
N18–0707 2018 Apr 30 Human Ascitic fluid 79/F SAMN15325568
N18–0719 2018 May 2 Human Blood 59/F SAMN15325569
N18–1073 2018 Jun 26 Human Blood <1/F SAMN15325570
N18–1074 2018 Jun 26 Human Blood 88/F SAMN15325571
N18–1075 2018 Jun 26 Human Maternal placenta tissue 38/F SAMN15325572
N18–1093 2018 Jun 27 Human Blood 82/M SAMN15325573
N18–1123 2018 Jul 3 Human Blood 81/M SAMN15325574
N18–1124 2018 Jul 3 Human Blood 99/M SAMN15325575
N18–1339 2018 Jul 24 Human Blood 82/F SAMN15325576
N18–1398 2018 Jul 31 Human Blood 48/M SAMN15325577
N18–1399 2018 Jul 31 Human Blood 14/M SAMN15325578
N20–0137 2020 Jan 22 Human Blood 77/M SAMN15325579
N20–0245 2020 Feb 7 Human Blood 73/M SAMN15325580
N20–0505 2020 Mar 17 Human Blood 73/M SAMN15325581
N20–0571 2020 Mar 30 Human Blood 85/M SAMN15325582
N20–0605 2020 Apr 6 Human Blood 73/M SAMN15325583
N20–0626 2020 Apr 15 Human Blood 85/M SAMN15325584
N20–0655 2020 Apr 20 Human Blood 66/F SAMN15325585
N20–0656 2020 Apr 20 Human Blood 81/F SAMN15325586
N20–0662 2020 Apr 22 Human Blood 86/F SAMN15325587
N20–0664 2020 Apr 22 Human Blood 69/F SAMN15325588
N20–0674 2020 Apr 23 Human Blood 84/F SAMN15325589
N20–689 2020 Apr 29 Human Blood 63/F SAMN15325590
N20–725 2020 May 4 Human Blood 81/M SAMN15325592
N20–737 2020 May 5 Human Blood 86/M SAMN15325593
N20–742 2020 May 6 Human Blood 78/F SAMN15325594
N20–743 2020 May 6 Human Blood 37/M SAMN15325595
N20–753 2020 May 8 Human Blood 75/M SAMN15325596
N20–754 2020 May 8 Human Blood 85/F SAMN15325597
N20–771 2020 May 11 Human Blood 95/F SAMN15325598
N20–778 2020 May 12 Human Blood 95/F SAMN15325599
N20–851 2020 May 22 Human Perianal abscess 85/M SAMN15325600
N20–861 2020 May 26 Human Blood 83/F SAMN15325601
N20–639 2020 Apr 30 Food Cheese sample NA/NA SAMN15325591
N20–757 2020 May 3 Environment Scrub sponge NA/NA SAMN15375881
N20–759 2020 May 3 Environment Drainage channel NA/NA SAMN15375882
N20–761 2020 May 3 Environment Door handle NA/NA SAMN15375884
N20–764 2020 May 3 Environment Cellar floor NA/NA SAMN15375885
N20–767 2020 May 3 Environment Ripening cellar floor NA/NA SAMN15375883

*ID, identification; NA, not applicable.

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Page created: September 23, 2020
Page updated: December 21, 2020
Page reviewed: December 21, 2020
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.