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Table 1 Characteristics of Norovirus Outbreaks

From: Of gastro and the gold standard: evaluation and policy implications of norovirus test performance for outbreak detection

Outbreak Characteristic (N = 324) Number (% or Range)
Median Specimens Submitted per Outbreak 2 (1 to 26)
Outbreak Identification  
   PCR only 209 (64.5)
   EM only 2 (0.6)
   EM and RT2-PCR 113 (34.9)
Outbreak Locale or Institution Type  
   Long-term Care or Skilled Nursing Facility 177 (54.6)
   Healthcare Facility 30 (9.3)
   Daycare or Preschool 14 (4.3)
   Restaurant or Hospitality Industry 8 (2.5)
   Family or Private Home 4 (1.2)
   Unspecified 89 (27.6)
Location  
   Greater Toronto Area (Toronto, Durham, Halton, Peel and York) 123 (38.0)
   Ottawa 51 (15.7)
   Hamilton-Niagara 55 (17.0)
  1. RT2-PCR, real-time reverse-transcriptase polymerase chain reaction; EM, electron microscopy.