Serological cross-sectional studies on salmonella incidence in eight European countries: no correlation with incidence of reported cases

Table 1 Serum collections tested for antibodies against salmonella

Country	Period of serum collection	Number of sera	Female-to-male ratio	Age [mean (range)]
Finland	Sept. 2000 - March 2001	500	1.1	44 (30–59)
Sweden ^a	May 2007 - Jan. 2008	525	1.7	51 (18–76)
Denmark	June 2006 - July 2007	1780	1.2	49 (18–71)
The Netherlands	Jan. 2006 - June 2007	1053	1.6	39 (18–60)
Italy	Jan. 2003 - April 2004	516	1.0	34 (18–60)
Romania	Sept. 2007	509	1.0	38 (18–60)
France	May 2003 - April 2004	1010	1.0	38 (18–60)
Poland	2004 ^b	500	1.6	37 (18–60)

^a In Sweden sera from older people were included in order to achieve a sufficient sample size.
^b Sera from Poland were randomly chosen from a collection of sera from 2004 that had no exact sampling dates recorded.

ISSN: 1471-2458