Evaluation of underreporting of salmonellosis and shigellosis hospitalised cases in Greece, 2011: results of a capture-recapture study and a hospital registry review

Table 1 Underreporting of salmonellosis and shigellosis hospitalised cases, Greece, 2011

	Salmonellosis	Shigellosis
Notification
Number of cases–MNS*	478	47
Number of isolates–NRLSS**	481	28
Capture-recapture study
Estimated total number of cases (95% CI†)	915 (861–969)	98 (67–129)
Estimated underreporting–MNS (95% CI†)	47.7% (41.8–53.6%)	52.0% (29.8–63.5)
Hospital registry review
Number of diagnosed cases (positive cultures)	1012	113
Number of cases not reported to MNS	534 (1012–478)	66 (113–47)
Underreporting-MNS	534/1012 (52.8%)	66/113 (58.4%)

Results of a capture-recapture study and a hospital registry review.
*MNS: Mandatory Notification System.
**NRLSS: National Reference Laboratory for Salmonella spp. and Shigella spp.
† CI: confidence interval.

ISSN: 1471-2458