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CDC FoodCORE Year Two Cumulative Metrics - Salmonella, Shiga Toxin-producing Escherichia coli, and Listeria (SSL)

Data Report Period: October 1, 2011 to December 31, 2012

Performance Metrics:
(See SSL Metrics for complete language and definition)
Salmonella Measures
Mean (Range)
STEC Measures
Mean (Range)
Listeria Measures
Mean (Range)
SSL Measures
Mean of Individual Means
1a- Total number of isolates and isolate-yielding specimens1 1029.3 (375 – 1765) 179.6 (21 – 396) 27.6 (4 – 77) 412.2
1b- Number of primary isolates/isolate-yielding specimens 969.4 (349 – 1699) 170.0 (21 – 343) 26.4 (4 – 77) 388.6
2a- Total number of STEC clinical specimens or samples received at PHL N/A 294.1 (28 – 1008) N/A N/A
2b- Number; Percent isolate-yielding STEC specimens or samples N/A 115.3 (11 – 241); 52.4% (27 – 95%) N/A N/A
3- Median days from isolation /isolate-yielding specimen collection to receipt at PHL1 5.6 days (4 – 8 days) 4.6 days (3 – 6) days 5.9 days (4 – 8) days 5.4 days
4- Median days from receipt of isolate-yielding specimens at PHL to recovery of isolate 2.8 days (1 – 6 days) 3.8 days (1 – 6) days 2.3 days (1 – 3) days 3.0 days
5- Percent of primary isolates with serotype information1 99.1% (94 – 100%) 94.6% (82 – 100%) N/A 96.9%
6- Median days from isolate receipt (recovery) at PHL to serotype result1 4.0 days (2 – 6 days) 5.3 days (3 – 7) days N/A 4.7 days
7- Percent of primary isolates with PFGE information1 98.1% (94 – 100%) 97.4% (89 – 100%) 98.7% (91 – 100%) 98.1%
8- Median days from isolate receipt (recovery) at PHL to PulseNet upload1 5.4 days (2 – 13 days) 4.1 days (2 – 7) days 3.7 days (2 – 7) days 4.4 days
9- Number of laboratory confirmed cases reported to epidemiology staff1 971.4 (286 – 1433) 151.6 (15 – 318) 20.0 (4 – 46) 381.0
10a- Percent of cases with attempted interview1 98.0% (94 – 100%) 98.1% (90 – 100%) 100% (100 – 100%) 98.7%
10b- Median days from case report to interview attempt 2.3 days (0 – 4 days) 1.9 days (0 – 5) days 1.9 days (0 – 8) days 2.0 days
10c- Percent of cases with complete demographic data 85.7% (71 – 93%) 91.7% (81 – 100%) 96.9% (88 – 100%) 91.4%
10d- Percent of cases with exposure history1 83.9% (66 – 93%) 86.4% (73 – 96%) 86.1% (75 – 100%) 85.5%
10d.i- Percent of SSL cases with full shotgun or case exposure completed 77.5% (64 – 93%) 77.7% (54 – 88%) 72.8% (44 – 100%) 76.0%
10e- Percent of cases with serotype information 94.0% (78 – 100%) 93.1% (77 – 100%) N/A 93.6%
10f- Percent of cases with PFGE information 92.0% (78 – 100%) 93.4% (78 – 100%) 95.3% (87 – 100%) 93.6%
10f.i- Percent of cases with PFGE with complete epi data1 65.3% (42 – 87%) 77.3% (57 – 92%) 75.3% (65 – 88%) 72.6%
10g- Reasons for not interviewing cases 652 (9.6%) have reason for not interviewing 63 (5.9%) have reason for not interviewing 25 (17.9%) have reason for not interviewing 740 (9.2%) have reason for not interviewing
10g.i- Lost to Follow-up: Number; Percent 85.4 (11 – 282); 67.5% (24 – 90%) 7.5 (0 – 20); 48.8% (0 – 91%) 1.0 (0 – 3); 33.6% (0 – 100%) 31.3 (50.0%)
10g.ii- Refused: Number; Percent 9.8 (0 – 22); 6.3% (0 – 12%) 1.8 (0 – 7); 19.8% (0 – 70%) 0.8 (0 – 3); 12.5% (0 – 50%) 4.1 (12.9%)
10g.iii- Time lag too long: Number(Percent) 1.8 (0 – 4); 2.8% (0 – 4%) 0.4 (0 – 2); 1.6% (0 – 8%) 0 (0 – 0); 0% (0 – 0%) 0.7 (1.5%
10g.iv- Other: Number; Percent 41.8 (1 – 130); 22.4% (4 – 65%) 1.4 (0 – 3); 14.4% (0 – 30%) 4.3 (0 – 10); 51.8% (0 – 100%) 15.8 (29.5%)
11- Number of clusters 69.4 (11 – 101) 12.6 (1 – 35) 2.9 (0 – 13) 28.3
11a- Median and range of cluster size(primary cases only) Median size 2.2 (2 – 3), Minimum size 1.3 (1 – 2), Maximum size 26 (11 – 42) Median size 2.7 (2 – 6), Minimum size 1.8 (1 – 2), Maximum size 22.8 (2 – 79) Median size 1.0 (1 – 1), Minimum size 1.0 (1 – 1), Maximum size 1.3 (1 –2) Mean (Median) = 2.0, Mean (Minimum) = 1.4, Mean (Maximum) = 16.7
12- Number; Percent of clusters with cases in multiple states 27.7 (6 – 52); 41.4% (7 – 69%) 5.3 (0 – 14); 40.0% (0 – 60%) 2.8 (1 – 8); 85.8% (62 – 100%) 11.8 (55.7%)
13a- Number; Percent of clusters with routine interview of cases1 62.0 (11 – 101); 90.7% (61 – 100%) 11.4 (1 – 32); 95.3% (88 – 100%) 3.8 (1 – 13); 93.4% (67 – 100%) 25.7 (93.1%)
13b- Number; Percent of clusters with supplemental/targeted interviewing 14.9 (6 – 30); 26.4% (7 – 54%) 7.1 (1 – 22); 70.3% (20 – 100%) 0.6 (0 – 1); 31.6% (0 – 100%) 7.5 (42.8%)
13c- Number; Percent of clusters where an analytic epidemiologic study conducted (>10 Salmonella or STEC cases, >5 Listeria cases)1 4.3 (1 – 8); 13.7% (3 – 50%) 2.9 (0 – 14); 31.4% (0 – 100%) 0.4 (0 – 1); 11.6% (0 – 50%) 2.5 (18.9%)
13d- Median duration ( in days) of epidemiologic investigation, from cluster notification to end of investigation/close-out 35.2 days (7 – 60) 34.0 days (10 – 60) 106.0 days (54 – 204) 58.4 days
14- Number; Percent of clusters with suspect vehicle/source identified1 6.7 (3 – 15); 12.6% (3 – 36%) 5.4 (0 – 22); 37.6% (0 – 75%) 0.0 (0 – 0); 0.0% (0 – 0%) 4.0 (16.7%)
15- Number; Percent of clusters with confirmed vehicle/source identified1 6.0 (1 – 12); 8.9% (2 – 18%) 1.6 (0 – 4); 16.6% (0 – 50%) 0.8 (0 – 3); 14.6% (0 – 50%) 2.8 (13.4%)
16- Number; Percent of clusters with identified vehicle/source with:        
16a- Exclusion of ill person(s) 0.5 (0 – 1); 2.8% (0 – 9%) 2.3 (0 – 8); 20.3% (0 – 50%) No cumulative data available2 1.7 (11.6%)
16b- Remediation or closure 0 (0 – 0); 0% (0 – 0%) 1.8 (0 – 5); 23.5% (0 – 50%) No cumulative data available2 0.9 (11.8%)
16c- Educational campaign 1.3 (0 – 3); 15.3% (0 – 43%) 2.3 (0 – 8); 14.0% (0 – 31%) No cumulative data available2 1.8 (14.7%)
16d- Media/public messaging 1.3 (0 – 3); 7.0% (0 – 14%) 1.3 (0 – 3); 27.8% (0 – 50%) No cumulative data available2 1.3 (17.4%)
16e- Regulatory action (recall, hold) 2.8 (0 – 5); 20.0% (0 – 71%) 0.8 (0 – 2); 14.5% (0 – 50%) No cumulative data available2 1.8 (17.3%)
17- Number; Percent of clusters linked to a restaurant/food establishment with EHA1 2.5 (1 – 5); 21.2% (2 – 100%) 2.0 (0 – 5); 37.9% (0 – 100%) 0.6 (0 – 2); 13.0% (0 – 50%) 1.7 (24.0%)
18- Number; Percent of clusters with food/environmental sample collected for testing1 3.7 (1 – 7); 45.7% (3 – 9%) 1.7 (0 – 5); 31.6% (0 – 100%) 0.6 (0 – 2); 13.0% (0 – 50%) 2.0 (16.8%)
19- Number; Percent of clusters where EH, Ag, regulatory, or food safety program staff contacted1 18.4 (1 – 82); 23.0% (5 – 93%) 4.6 (1 – 13); 47.9% (25 – 100%) 0.8 (0 – 3); 14.6% (0 – 50%) 7.9 (28.5%)
20- Number; Percent of outbreaks with NORS form completed1 10.0 (5 – 16); 69.5% (5 – 100%) 2.2 (1-5); 70.0% (20-100%) No cumulative data available2 6.1 (69.8%)

1 Minimum reporting requirement for FoodCORE Centers

2 Cumulative data for this metric were not reported from 3 or more centers

This table was included as a supplemental data file in an article published in final form in the Journal of Public Health Management and Practice. 21(4):E18-26, July/August2015 (doi: 10.1097/PHH.0000000000000115). (http://journals.lww.com/jphmp/pages/default.aspx)

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