CDC FoodCORE Year Ten Cumulative Metrics Data – Norovirus, Other Etiology, and Unknown Etiology (NOU)
Data Report Period: January 1, 2020 to December 31, 2020
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 | 44 (2–137) n=10 |
11 (2–48) n=10 |
11 (1–37) n=10 |
| 1b. Number of foodborne or point-source investigations | 4 (0–11) n=10 |
5 (0–9) n=10 |
2 (0–6) n=10 |
| 1c. Number of person-to-person investigations | 40 (1–126) n=10 |
2 (0–5) n=10 |
9 (0–37) n=10 |
| 2a.1 Number; Percent of investigations with clinical specimens submitted to any lab | 19 (1–71) 59% (9%–100%) n=10 |
10 (2–44) 88% (60%–100%) n=10 |
3 (0–16) 45% (0%–100%) n=10 |
| 2a.2 Number; Percent of investigations with clinical specimens submitted to PHL | 11 (0–45) 28% (0%–58%) n=10 |
9 (0–44) 67% (0%–100%) n=10 |
2 (0–9) 37% (0%–100%) n=10 |
| 2b. Number; Percent of investigations where clinical specimens were tested for GI viruses at PHL | 11 (0–45) 90% (0%–100%) n=10 |
1 (0–3) 27% (0%–100%) n=10 |
2 (0–9) 38% (0%–100%) n=8 |
| 2b.1 Number; Percent of investigations where specimens were tested for norovirus by RT-PCR at PHL | 11 (0–45) 90% (0%–100%) n=10 |
1 (0–3) 46% (0%–100%) n=8 |
2 (0–9) 43% (0%–100%) n=7 |
| 2b.1.1 Number; Percent of norovirus investigations with positive specimens sequenced and uploaded to CaliciNet | 13 (4–33) 68% (0%–100%) n=6 |
n/a | n/a |
| 2b.1.1.1 Median days from first norovirus detection via RT-PCR to upload to CaliciNet | 4 (0–7) n=6 |
n/a | n/a |
| 2b.2 Number; Percent of investigations where specimens were tested for other viruses at PHL | 2 (0–9) 27% (0%–100%) n=9 |
1 (0–3) 38% (0%–100%) n=7 |
1 (0–6) 29% (0%–100%) n=7 |
| 2c. Number; Percent of investigations where specimens were tested for pathogenic bacteria or their toxins, antigens, or antibodies at PHL | 2 (0–13) 37% (0%–100%) n=10 |
9 (0–41) 72% (0%–100%) n=9 |
1 (0–6) 48% (0%–100%) n=7 |
| 2c.1 Number; Percent of investigations where specimens were tested using culture-based diagnostics at PHL | 2 (0–13) 24% (0%–100%) n=10 |
9 (0–41) 56% (0%–100%) n=8 |
0 (0–1) 14% (0%–100%) n=7 |
| 2c.2 Number; Percent of investigations where clinical specimens were tested using non-culture-based diagnostics at PHL | 1 (0–8) 26% (0%–100%) n=10 |
1 (0–3) 22% (0%–100%) n=8 |
0 (0–2) 29% (0%–100%) n=7 |
| 2d. Number; Percent of investigations where clinical specimens were tested for parasites at PHL | 0 (0–1) 20% (0%–100%) n=10 |
2 (0–5) 34% (0%–100%) n=9 |
1 (0–6) 24% (0%–100%) n=7 |
| 3a. Number; Percent of foodborne or point-source investigations with exposure assessments conducted | 3 (0–11) 54% (0%–100%) n=10 |
4 (1–17) 68% (13%–100%) n=9 |
1 (0–3) 15% (0%–100%) n=9 |
| 3b. Number; Percent of foodborne or point-source investigations where an analytic epidemiologic study was conducted | 2 (0–7) 32% (0%–100%) n=10 |
3 (0–17) 30% (0%–100%) n=9 |
4 (0–37) 13% (0%–100%) n=9 |
| 4. Number; Percent of foodborne or point-source investigations with suspect vehicle/source identified | 1 (0–4) 31% (0%–100%) n=10 |
3 (0–8) 49% (0%–100%) n=9 |
0 (0–0) 0% (0%–0%) n=9 |
| 5. Number; Percent of foodborne or point-source investigations with confirmed vehicle/source identified | 1 (0–7) 8% (0%–64%) n=10 |
3 (0–7) 44% (0%–100%) n=9 |
0 (0–3) 6% (0%–50%) n=9 |
| 6. Number; Percent of foodborne or point-source investigations with identified source with: | |||
| a. Exclusion of ill person(s) | 1 (0–5) 19% (0%–100%) n=10 |
0 (0–1) 4% (0%–20%) n=9 |
0 (0–0) 0% (0%–0%) n=9 |
| b. Remediation or closure | 1 (0–5) 19% (0%–100%) n=10 |
1 (0–5) 19% (0%–100%) n=9 |
0 (0–0) 0% (0%–0%) n=9 |
| c. Educational campaign | 0 (0–0) 0% (0%–0%) n=10 |
1 (0–6) 12% (0%–100%) n=9 |
0 (0–0) 0% (0%–0%) n=8 |
| d. Media/public messaging | 0 (0–0) 0% (0%–0%) n=10 |
1 (0–6) 18% (0%–100%) n=9 |
0 (0–0) 0% (0%–0%) n=9 |
| e. Regulatory action (recall, hold) | 0 (0–0) 0% (0%–0%) n=10 |
1 (0–6) 15% (0%–100%) n=9 |
0 (0–0) 0% (0%–0%) n=9 |
| 7. Number; Percent of foodborne or point-source investigations linked to a common location where an on-site EHA was conducted | 3 (0–11) 61% (0%–100%) n=10 |
2 (0–5) 57% (0%–100%) n=9 |
1 (0–5) 36% (0%–100%) n=9 |
| 8. Number; Percent of foodborne or point-source investigations where food or environmental sample(s) were collected for testing | 0 (0–1) 1% (0%–9%) n=10 |
1 (0–5) 27% (0%–50%) n=9 |
0 (0–0) 0% (0%–0%) n=9 |
| 9. Number; Percent of foodborne or point-source investigations where environmental health partners were contacted | 4 (0–11) 72% (0%–100%) n=10 |
3 (0–7) 57% (0%–100%) n=9 |
2 (0–6) 56% (0%–100%) n=9 |
| 10. Number; Percent of outbreaks with NORS forms completed | 39 (0–137) 77% (0%–100%) n=10 |
6 (1–13) 75% (17%–100%) n=10 |
5 (0–27) 77% (0%–100%) n=10 |
All data are cumulative. Core performance metrics that are required for reporting are in bold.
*CDC FoodCORE centers reported on Year Ten (2020) cumulative metrics in 2021. 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.
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Page last reviewed: October 8, 2021