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

Table 2 Salmonella sero-incidence, serum immunoglobulin concentration, incidence of reported cases, and population incidence estimate derived from infection risk in Swedish travellers

Country	Sero-incidence^a (95 % CI)	IgG^b	IgM^b	IgA^b	Reported cases^a	Multiplier	Incidence estimated from risk in Swedish travellers^a	Multiplier
	(A)				(B)	(A/B)	(C)	(A/C)
Finland	56 (8–151)	0.05	0.09	0.03	0.55	102	0.08	140^c
Sweden	58 (8–155)	0.06	0.10	0.02	0.43	134	n/a	n/a
Denmark	84 (41–141)	0.07	0.10	0.04	0.29	289	0.81	104
The Netherlands	149 (78–245)	0.17	0.11	0.04	0.14	1064	0.98	152
Italy	239 (115–411)	0.24	0.14	0.06	0.12	1992	2.71	88
Romania	385 (217–613)	0.32	0.19	0.07	0.04	9625	14.57	26
France	404 (272–573)	0.25	0.21	0.07	0.20	2010	1.78	227
Poland	547 (343–813)	0.36	0.20	0.09	0.42	1302	16.26	33

^a per 1000 person-years.
^b median serum immunoglobulin concentration in arbitrary units of optical density.
^c adjusted for proportion of domestically acquired infections (~20%).
CI = credible interval.
n/a = not applicable.

ISSN: 1471-2458