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Volume 14, Number 5—May 2008

Research

Increasing Incidence of Listeriosis in France and Other European Countries

Véronique Goulet*Comments to Author , Craig Hedberg*†, Alban Le Monnier‡, and Henriette de Valk*
Author affiliations: *Institut de Veille Sanitaire, Saint Maurice, France; †University of Minnesota School of Public Health, Minneapolis, Minnesota, USA; ‡Institut Pasteur, Paris, France;

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Table 5

Description of the diversity, according to serovar, of Listeria monocytogenes strains isolated in 2006 for strains belonging to serovars 1/2a, 1/2b, 1/2c, and 4b

Characteristic 1/2a 1/2b 1/2c 4b Total
No. L. monocytogenes strains 80 49 11 139 279
No. pulsotype 42 26 6 28 102
No. pulsotype found once 32 18 4 13 67
Range of frequency for each pulsotype, min–max 1–17 1–10 1–5 1–30 1–30
No. clusters 2 0 0 9 11
Index of diversity 0.931 0.923 0.727 0.893 0.968

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