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Volume 7, Number 6—December 2001

Research

Effect of Prevention Measures on Incidence of Human Listeriosis, France, 1987-1997

Véronique Goulet*Comments to Author , Henriette de Valk*, Olivier Pierre†, Frédéric Stainer‡, Jocelyne Rocourt§, Véronique Vaillant*, Christine Jacquet§, and Jean-Claude Desenclos*
Author affiliations: *Institut de Veille Sanitaire, Saint-Maurice, France;; †Direction Générale de la Concurrence, Bureau Hygiène, Paris, France;; ‡Direction Générale de l'Alimentation, Bureau des Préventions des Contaminations, Paris, France;; §Institut Pasteur, Paris, France

Main Article

Table 2

Number of listeriosis cases by category of patient in 1987 and 1997, France: comparison of results from the total data set of two surveys and from a subset of hospitals reporting cases in both surveys

1987a 1997 b Percent changec 1987a 1997b Percent change
Pregnancy-associated 336 58 -83 166 25 -85
No predisposing condition; <65 years of age 66 13 -80 36 6 -84
Predisposing condition; >65 years of age 51 22 -57 19 8 -58
Predisposing condition 208 148 -29 112 85 -24
Total 661 241 -64 333 124 -63

aHospital laboratory survey.
bNational Reference Center.
cThe percent change in number of cases has been calculated instead of the percent change in incidence, to facilitate comparison with the figures from the subset of hospitals. As a result, the figures on percent change are slightly lower than those in Table 1, which take into account the increase in the French population during the 10-year period.

Main Article

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