Volume 17, Number 3—March 2011
Dispatch
Escherichia coli O157 Infection and Secondary Spread, Scotland, 1999–2008
Mary E. Locking
, Kevin G.J. Pollock, Lesley J. Allison, Linda Rae, Mary F. Hanson, and John M. Cowden
, Kevin G.J. Pollock, Lesley J. Allison, Linda Rae, Mary F. Hanson, and John M. Cowden
Table 2
Selected characteristics and health outcomes of secondary or primary symptomatic laboratory-confirmed Escherichia coli O157 cases, Scotland, 1999–2008
| Characteristic |
No. (%) cases, n = 2,026 |
p value |
|
| Secondary cases, n = 246* |
Primary cases, n = 1,780* |
||
| Case age <10 y | 116 (47) | 623 (35) | <0.0005 |
| Female sex | 147 (60) | 958 (54) | 0.07 |
| Bloody diarrhea† | 52 (54)† | 608 (66)† | 0.02 |
| Hospitalized | 82 (33) | 816 (46) | <0.0005 |
| Illness progressed to hemolytic uremic syndrome | 24 (10) | 172 (10) | 0.95 |
| Sporadic case | 158 (64) | 1492 (84) | <0.0005 |
| Outbreak case | 88 (36) | 288 (16) | <0.0005 |
| Outbreak case, with bloody diarrhea‡ | 25 (28)‡ | 81 (28)‡ | 0.93 |
| Outbreak case, hospitalized‡ | 32 (36)‡ | 128 (44)‡ | 0.22 |
*Unless otherwise indicated.
†Denominator = 1,022 symptomatic cases reported 2004–2008, all with symptom details available (97 secondary and 925 primary cases).
‡Denominator = 376 outbreak symptomatic cases (88 secondary and 288 primary cases).
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