CDC FoodCORE Year Eleven Cumulative Metrics Data – Norovirus, Other Etiology, and Unknown Etiology (NOU)
Data Report Period: January 1, 2021 to December 31, 2021
Ten state and local health departments participate in FoodCORE. Data are only reported when available from three or more centers; ‘n’ indicates the number of centers reporting each metric.*
| Performance Metrics: (See FoodCORE website for complete language and definitions) |
Norovirus Mean (Range) | Other Etiology Mean (Range) | Unknown Etiology Mean (Range) |
|---|---|---|---|
| 1a. Number of investigations | 50 (2–194) n=10 |
20 (3–91) n=10 |
16 (0–54) n=10 |
| 1b. Number of foodborne or point-source investigations | 6 (0–14) n=10 |
8 (1–18) n=10 |
5 (0–20) n=10 |
| 1c. Number of person-to-person investigations | 44 (0–180) n=10 |
4 (0–18) n=10 |
11 (0–45) n=10 |
| 2a.1 Number; Percent of investigations with clinical specimens submitted to any lab | 18 (2–37) 56% (19%–100%) n=10 |
16 (0–91) 76% (0%–100%) n=10 |
3 (0–8) 27% (0%–80%) n=10 |
| 2a.2 Number; Percent of investigations with clinical specimens submitted to PHL | 12 (1–29) 44% (3%–100%) n=10 |
17 (0–85) 64% (0%–100%) n=10 |
2 (0–5) 22% (0%–60%) n=10 |
| 2b. Number; Percent of investigations where clinical specimens were tested for GI viruses at PHL | 10 (1–29) 88% (31%–100%) n=10 |
2 (0–6) 38% (0%–100%) n=10 |
2 (0–5) 60% (0%–100%) n=9 |
| 2b.1 Number; Percent of investigations where specimens were tested for norovirus by RT-PCR at PHL | 10 (1–29) 95% (50%–100%) n=10 |
2 (0–6) 68% (0%–100%) n=10 |
2 (0–5) 56% (0%–100%) n=9 |
| 2b.1.1 Number; Percent of norovirus investigations with 2+ specimens confirmed positive for norovirus by conventional RT-PCR at the PHL where at least one specimen was sequenced and uploaded to CaliciNet | 7 (2–17) 65% (29%–100%) n=6 |
n/a | n/a |
| 2b.1.1.1 Median days from first norovirus detection via RT-PCR to upload to CaliciNet | 5 (2–7) n=6 |
n/a | n/a |
| 2b.2 Number; Percent of investigations where specimens were tested for other viruses at PHL | 3 (0–12) 25% (0%–100%) n=9 |
1 (0–2) 44% (0%–100%) n=9 |
1 (0–2) 34% (0%–100%) n=8 |
| 2c. Number; Percent of investigations where specimens were tested for pathogenic bacteria or their toxins, antigens, or antibodies at PHL | 5 (0–16) 54% (0%–100%) n=10 |
13 (1–85) 65% (0%–100%) n=10 |
2 (0–4) 53% (0%–100%) n=9 |
| 2c.1 Number; Percent of investigations where specimens were tested using culture-based diagnostics at PHL | 4 (0–16) 56% (0%–100%) n=8 |
12 (1–85) 76% (5%–100%) n=9 |
1 (0–3) 46% (0%–100%) n=7 |
| 2c.2 Number; Percent of investigations where clinical specimens were tested using non-culture-based diagnostics at PHL | 3 (0–7) 56% (0%–100%) n=8 |
1 (0–3) 51% (0%–100%) n=9 |
1 (0–3) 25% (0%–100%) n=7 |
| 2d. Number; Percent of investigations where clinical specimens were tested for parasites at PHL | 1 (0–7) 12% (0%–100%) n=9 |
2 (0–7) 26% (0%–75%) n=10 |
0 (0–3) 8% (0%–60%) n=8 |
| 3a. Number; Percent of foodborne or point-source investigations with exposure assessments conducted | 4 (0–12) 68% (0%–100%) n=10 |
6 (2–18) 71% (33%–100%) n=10 |
3 (0–9) 50% (0%–100%) n=10 |
| 3b. Number; Percent of foodborne or point-source investigations where an analytic epidemiologic study was conducted | 2 (0–8) 30% (0%–100%) n=10 |
3 (0–18) 39% (0%–100%) n=10 |
1 (0–3) 12% (0%–60%) n=10 |
| 4. Number; Percent of foodborne or point-source investigations with suspect vehicle/source identified | 1 (0–4) 27% (0%–80%) n=10 |
3 (0–9) 34% (0%–100%) n=10 |
1 (0–3) 8% (0%–25%) n=10 |
| 5. Number; Percent of foodborne or point-source investigations with confirmed vehicle/source identified | 1 (0–4) 6% (0%–33%) n=10 |
2 (0–6) 25% (0%–67%) n=10 |
0 (0–0) 0% (0%–0%) n=10 |
| 6. Number; Percent of foodborne or point-source investigations with identified source with: |  |
||
| a. Exclusion of ill person(s) | 1 (0–4) 20% (0%–80%) n=10 |
1 (0–2) 6% (0%–25%) n=10 |
0 (0–1) 3% (0%–20%) n=10 |
| b. Remediation or closure | 1 (0–2) 26% (0%–100%) n=10 |
2 (0–7) 24% (0%–57%) n=10 |
1 (0–4) 11% (0%–60%) n=10 |
| c. Educational campaign | 0 (0–1) 3% (0%–20%) n=10 |
1 (0–2) 6% (0%–25%) n=10 |
0 (0–1) 2% (0%–11%) n=10 |
| d. Media/public messaging | 0 (0–1) 5% (0%–33%) n=10 |
1 (0–6) 8% (0%–43%) n=10 |
0 (0–0) 0% (0%–0%) n=10 |
| e. Regulatory action (recall, hold) | 0 (0–0) 0% (0%–0%) n=10 |
0 (0–1) 5% (0%–25%) n=10 |
0 (0–1) 2% (0%–20%) n=10 |
| 7. Number; Percent of foodborne or point-source investigations linked to a common location where an on-site EHA was conducted | 4 (0–12) 66% (0%–100%) n=10 |
4 (0–10) 62% (0%–100%) n=10 |
3 (0–8) 57% (0%–100%) n=10 |
| 8. Number; Percent of foodborne or point-source investigations where food or environmental sample(s) were collected for testing | 0 (0–1) 3% (0%–20%) n=10 |
2 (0–5) 25% (0%–100%) n=10 |
0 (0–1) 3% (0%–20%) n=10 |
| 9. Number; Percent of foodborne or point-source investigations where environmental health partners were contacted | 5 (0–14) 75% (0%–100%) n=10 |
5 (0–12) 69% (0%–100%) n=10 |
3 (0–6) 66% (0%–100%) n=9 |
| 10. Number; Percent of outbreaks with NORS forms completed | 45 (1–157) 93% (50%–100%) n=10 |
12 (3–46) 81% (27%–100%) n=10 |
13 (0–47) 76% (0%–100%) n=10 |
All data are cumulative. Core performance metrics that are required for reporting are in bold.
*FoodCORE centers reported on Year 11 (2021) metrics in 2022. Performance measures where n<10 may be indicative of limitations in reporting due to restricted staff capacity as state and local health departments prioritized activities related to COVID-19 response efforts.