Volume 9, Number 4—April 2003
Research
The Elderly and Waterborne Cryptosporidium Infection: Gastroenteritis Hospitalizations before and during the 1993 Milwaukee Outbreak
Elena N. Naumova*
, Andrey I. Egorov*, Robert D. Morris*, and Jeffrey K. Griffiths*
, Andrey I. Egorov*, Robert D. Morris*, and Jeffrey K. Griffiths*
Table 1
Daily rates of gastroenteritis-related emergency room visits and hospitalizations per 100,000 elderly persons by age category before and during the 1993 outbreak of cryptosporidiosis, Milwaukee, Wisconsin
| Age group (y) | Before outbreak (452 d) |
During outbreak (28 d) |
|||
|---|---|---|---|---|---|
| Elderly population | No. cases | Daily rate/ 100,000 | No. cases | Daily rate/ 100,000 | |
| 65–69 |
39,561 |
66 |
0.37 |
15 |
1.35 |
| 70–74 |
33,019 |
108 |
0.72 |
17 |
1.84 |
| 75–79 |
26,188 |
97 |
0.82 |
12 |
1.64 |
| 80–84 |
17,584 |
93 |
1.17 |
16 |
3.25 |
| 85+ |
14,150 |
81 |
1.27 |
9 |
2.27 |
| All | 130,502 | 445 | 0.75 | 69 | 1.89 |
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