Norovirus Surveillance among Callers to Foodborne Illness Complaint Hotline, Minnesota, USA, 2011–2013 - Vol. 19 No. 8 - August 2013 - Emerging Infectious Disease journal - CDC
Table of Contents
Volume 19, Number 8–August 2013
Volume 19, Number 8—August 2013
Dispatch
Norovirus Surveillance among Callers to Foodborne Illness Complaint Hotline, Minnesota, USA, 2011–2013
Abstract
Norovirus is the leading cause of foodborne disease in the United States. During October 2011–January 2013, we conducted surveillance for norovirus infection in Minnesota among callers to a complaint-based foodborne illness hotline who reported diarrhea or vomiting. Of 241 complainants tested, 127 (52.7%) were positive for norovirus.Consistent with national trends (4), most foodborne disease outbreaks identified in Minnesota are caused by norovirus. In addition, most foodborne outbreaks in Minnesota, including virtually all norovirus outbreaks, are identified through a centralized foodborne illness complaint hotline system, operated by the Minnesota Department of Health (MDH) (5,6). However, most calls to the hotline represent sporadic (i.e., non–outbreak-associated) illness; only ≈7% of complaints are associated with known outbreaks (5). Systematic testing of hotline callers to determine illness etiology has not previously been conducted.
In this study, we conducted surveillance for norovirus among hotline callers. Our objectives were to characterize the role of norovirus as a cause of gastroenteritis in hotline callers and to describe trends in norovirus infection in this population as an indicator for norovirus activity in Minnesota.
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