Table 3.
Water- and foodborne disease outbreaks by month and pathogen in Korea, 2007–2009
| Pathogens | Total (no.) | % | January | February | March | April | May | June | July | August | September | October | November | December | Patients per outbreak |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | 913 | 100.0 | 46 | 41 | 54 | 81 | 115 | 98 | 89 | 112 | 111 | 56 | 56 | 54 | 25.8 |
| Identified | |||||||||||||||
| Norovirus | 151 | 16.5 | 18 | 14 | 14 | 24 | 18 | 12 | 5 | 2 | 5 | 4 | 16 | 19 | 29.8 |
| Pathogenic Escherichia coli | 127 | 13.9 | 3 | 0 | 3 | 13 | 13 | 20 | 23 | 21 | 19 | 7 | 2 | 3 | 54.7 |
| Salmonella spp. | 70 | 7.7 | 0 | 1 | 5 | 6 | 15 | 12 | 8 | 7 | 12 | 2 | 1 | 1 | 28.2 |
| Vibrio parahaemolyticus | 64 | 7.0 | 0 | 0 | 1 | 0 | 2 | 3 | 7 | 24 | 18 | 7 | 2 | 0 | 15.7 |
| Staphylococcus aureus | 50 | 5.5 | 3 | 2 | 1 | 2 | 8 | 6 | 8 | 4 | 8 | 5 | 2 | 1 | 37.6 |
| Campylobacter spp. | 17 | 1.9 | 0 | 0 | 0 | 1 | 3 | 1 | 5 | 4 | 2 | 1 | 0 | 0 | 63.8 |
| Shigella spp. | 17 | 1.9 | 4 | 0 | 1 | 0 | 2 | 1 | 0 | 0 | 2 | 2 | 4 | 1 | 7.8 |
| Bacillus cereus | 14 | 1.5 | 0 | 1 | 2 | 2 | 2 | 2 | 0 | 2 | 1 | 0 | 1 | 1 | 21.3 |
| Clostridium perfringens | 10 | 1.1 | 0 | 1 | 4 | 2 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 94.6 |
| Others | 17 | 1.9 | 0 | 1 | 1 | 3 | 3 | 2 | 2 | 1 | 2 | 0 | 2 | 0 | 22.1 |
| Multiple pathogens | 12 | 1.3 | 0 | 2 | 1 | 0 | 3 | 1 | 0 | 1 | 0 | 1 | 0 | 3 | 28.8 |
| Subtotal | 549 | 60.1 | 28 | 22 | 33 | 53 | 70 | 60 | 58 | 66 | 70 | 29 | 30 | 30 | 35.5 |
| Unidentified | 364 | 39.9 | 18 | 19 | 21 | 28 | 45 | 38 | 31 | 46 | 41 | 27 | 26 | 24 | 11.1 |