Table 2.
Date of onset of new appendicitis cases from the end of the initial cluster to June 2000
| Case no. | Dates of onset |
|---|---|
| 1 | 09-29-97 |
| 2 | 10-01-97 |
| 3 | 12-15-97 |
| 4 | 12-25-97 |
| 5 | 03-30-98 |
| 6 | 04-04-98 |
| 7 | 10-21-98 |
| 8 | 10-22-98 |
| 9 | 10-26-98 |
| 10 | 10-31-98 |
| 11 | 11-1-98 |
| 12 | 03-30-99 |
| 13 | 08-?-99* |
| 14 | 09-19-99 |
| 15 | 09-30-99 |
| 16 | 01-02-00 |
| 17 | 04-03-00 |
| 18 | 04-10-00 |
| 19 | 04-20-00 |
| 20 | 06-?-00* |
*
Exact dates are unknown because the patients were not hospitalized in a collaborating hospital. With the exception of 4 cases (cases 12, 13, 16, and 20), all cases occurred in clusters, and the longest interval between cases in each cluster was 11 days, with 5 of the 20 cases clustered in a 11-day period from October 21 to November 1, 1998.