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Table 2 Outbreaks of NLV investigated from August 1998 to May 2001.

From: Gastroenteritis outbreaks associated with Norwalk-like viruses and their investigation by nested RT-PCR

Outbreak Type of Outbreak Date +ve/nt1 nRT-PCR (% +ve2) Number of individuals involved
1 Ferry Ship Aug 1998 8/10 80% 14
2 Country Hotel Aug 1998 14/17 82% 514
3 Nursery school Nov 1998 7/12 50% 25
4 City Hotel Jan 1999 3/3 100% 23
5 Restaurant Jan 1999 8/32 25%  
6 Restaurant Mar 1999 7/7 100% 7
7 Large Hospital Mar 1999 14/116 12.1% 70
8 Psychiatric Hospital Mar 1999 27/35 77%  
9 Restaurant Mar 1999 5/5 100%  
10 Large Hospital Mar 1999 16/58 27% 58
11 Medical Ward Apr 1999 9/17 53% 30
12 District Hospital Apr 1999 8/32 25%  
13 Medical Ward May 1999 3/5 60%  
14 Nursing Home Jun 1999 2/2 100%  
15 Nursing Home Nov 1999 2/2 100% 35
16 Care of Elderly Ward Feb 2000 5/15 33%  
17 Large Hospital Feb 2000 9/78 11.5%  
18 Staff Function Mar 2000 0/7 0% 109
19 Care of Elderly Ward Apr 2000 8/22 36%  
20 Nursing Home Apr 2000 2/5 40% 16
21 Nursing home Apr 2000 2/2 100%  
22 Large Hospital Apr 2000 7/37 19%  
23 District Hospital May 2000 2/2 100%  
24 Care of Elderly Ward May 2000 9/12 75%  
25 Nursing Home Jun 2000 2/5 40%  
26 Hotel Aug 2000 8/10 80%  
27 Hotel Dec 2000 6/12 50% 485
28 Large Area Hospital Jan 2001 12/67 17.9%  
29 Hotel Mar 2001 3/3 100%  
30 Regimental Reunion Apr 2001 9/11 82% 750
31 Leisure Centre May 2001 4/6 66% 94
  1. 1Number positives/number tested 2Percentage positive