2026-07-22T00:35:27Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/113942025-04-23T10:39:40Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19608

00925njm 22002777a 4500 dc Korczyńska, Monika Roberta author Dalsgaard Bjerre, K author Dam Rasmussen, L author Tvenstrup Jensen, E author Fischer, T K author Barrasa, Alicia author Ethelberg, S author 2020 Norovirus (NoV) infections occur very frequently yet are rarely diagnosed. In Denmark, NoV infections are not under surveillance. We aimed to collect and describe existing laboratory-based NoV data. National NoV laboratory data were collected for 2011-2018, including information on patient identification number, age and sex, requesting physician, analysis date and result. We defined positive patient-episodes by using a 30-day time window and performed descriptive and time series analysis. Diagnostic methods used were assessed through a survey. We identified 15 809 patient-episodes (11%) out of 142 648 tested patients with an increasing trend, 9366 in 2011 vs. 32 260 in 2018. This corresponded with a gradual introduction of polymerase chain reaction analysis in laboratories. The highest positivity rate was in patients aged <5 years (15%) or >85 years (17%). There was a large difference in test performance over five Danish geographical regions and a marked seasonal variation with peaks from December to February. This is the first analysis of national NoV laboratory data in Denmark. A future laboratory-based surveillance system may benefit public health measures by describing trend, burden and severity of seasons and possibly pinpoint hospital outbreaks. Epidemiol Infect. 2020 Feb 17;148:e52. 10.1017/S0950268820000461 1469-4409 Epidemiology and infection 32063241 http://hdl.handle.net/20.500.12105/11394 Epidemiology Norwalk agent and related viruses Hospital-acquired (nosocomial) infections Norovirus Surveillance Detection of norovirus infections in Denmark, 2011-2018.