TABLE. Emergency department–based and wastewater-based surveillance for influenza and respiratory syncytial virus — Green Bay, Madison, and Milwaukee, Wisconsin, August 2022–March 2023.
| Characteristic | City |
|||
|---|---|---|---|---|
| Green Bay | Madison | Milwaukee | Total | |
|
Emergency department influenza data
| ||||
| No. of visits with illness meeting syndromic case definition* |
1,251 |
805 |
4,215 |
6,271
|
| Median age, yrs (IQR) |
20 (6–44) |
21 (7–45) |
28 (14–48) |
26 (10–46)
|
|
Emergency department RSV data
| ||||
| No. of visits meeting syndromic case definition* |
641 |
269 |
608 |
1,518
|
| Median age, yrs (IQR) |
2 (0–6) |
1 (0–4) |
3 (1–34) |
2 (0–9)
|
|
Wastewater data
| ||||
| No. of wastewater treatment plants serving city |
1 |
1 |
2 |
4
|
| Estimated population served by all wastewater treatment plants |
189,000 |
345,000 |
1,085,941 |
1,619,941
|
| Total no. of wastewater samples collected |
61 |
78 |
111 |
250
|
| Average no. of wastewater samples collected per wk | 1.7 | 2.2 | 3.2 | 2.4 |
Abbreviation: RSV = respiratory syncytial virus.
* Diagnostic codes and clinical terms were based on International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM), International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM), and Systematized Nomenclature of Medicine–Clinical Terms (SNOMED CT). https://www.cdc.gov/ncird/surveillance/respiratory-illnesses/index.html#companion-guide