Table 2.
Gastrointestinal Outbreaks with 50 or More Cases in the San Francisco Bay Area, January 2006 through December 2007
| Etiology | Cases | First Onset | Last Onset | Institutional | Over-the-Counter Drug ARIMA (0,1,1) Signal |
|---|---|---|---|---|---|
| Norovirus | 101 | 1/25/06 | Yes | Yes | |
| Unknown/Norovirus | 60 | 4/18/06 | No | Yes | |
| Unknown/Norovirus | 62 | 4/24/06 | Yes | Yes | |
| Norovirus | 107 | 4/25/06 | 5/2/2006 | No | No |
| Unknown/Norovirus | 55 | 4/26/06 | No/Unknown | Yes | |
| Norovirus | 50 | 5/8/06 | Yes | Yes | |
| Norovirus | 81 | 10/26/06 | Yes | No | |
| Norovirus | 86 | 11/23/06 | Yes | No | |
| Norovirus | 72 | 11/30/06 | Yes | No | |
| Norovirus | 63 | 11/30/06 | Yes | No | |
| Unknown | 80 | 12/7/06 | Yes | No | |
| Unknown | 61 | 12/7/06 | No/Unknown | No | |
| Norovirus | 76 | 1/3/07 | Yes | No | |
| Norovirus | 60 | 1/8/07 | Yes | No | |
| Norovirus | 92 | 7/13/07 | 7/17/07 | No | No |
| Norovirus | 153 | 8/3/07 | 8/17/07 | No/Unknown | No |
| Norovirus | 51 | 9/15/07 | 9/19/07 | No/Unknown | No |
| Norovirus | 52 | 12/20/07 | 1/1/08 | Yes | No |
| Norovirus | 52 | 12/22/07 | Yes | No | |
| Norovirus | 76 | 12/22/07 | 1/15/08 | No/Unknown | No |
Abbreviations: ARIMA(0,1,1) First Order Integrated Moving Average