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

Data Report Period: January 1, 2013 to December 31, 2013

Performance Metrics:
(See SSL Metrics for complete language and definitions)
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 944.7 (369 – 1505) 144.3 (60 -293) 21.1 (3 – 43) 370.0
1b Number of primary isolates/isolate-yielding specimens 873.9 (339 – 1342) 124 (54 – 242) 20.7 (3 – 41) 339.5
2a- Total number of STEC clinical specimens or samples received at PHL N/A 270.1 (88 – 985) N/A N/A
2b- Number; Percent isolate-yielding STEC specimens or samples N/A 112.7 (15 –293);52.9% (17 –82%) N/A N/A
3- Median days from isolation /isolate-yielding specimen collection to receipt at PHL1 5.4 days (4 – 7 days) 4.4 days (3 – 6 days) 5.3 days (3 – 7 days) 5.0 days
4- Median days from receipt of isolate-yielding specimens at PHL to recovery of isolate 2.2 days (1 – 4 days) 2.8 days (1 – 4 days) 1.3 days (1 – 2 days) 2.1 days
5- Percent of primary isolates with serotype information1 99.7% (99 – 100%) 88.4% (58 – 100%) N/A 94.1%
6- Median days from isolate receipt (or recovery) at PHL to serotype result1 3.9 days (3 – 6 days) 3.4 days (1 – 6 days) N/A 3.7 days
7- Percent of primary isolates with PFGE information1 99.9% (99 – 100%) 97.9% (89 – 100%) 98.6% (90 – 100%) 98.8%
8 Median days from isolate receipt (or recovery) at PHL to PFGE upload to PulseNet1 4.9 days (3 – 8 days) 4 days ( 3 – 5 days) 3.2 days (3 – 4 days) 4.0 days
9- Number of laboratory confirmed cases reported to epidemiology staff11 860.9 (321 – 1162) 124.3 (8 – 231) 17.7 (3 -32) 334.3
10a- Percent of cases with attempted interview1 98.9% (97 – 100%) 99.1% (96 – 100%) 99% (93 – 100%) 99.0%
10b- Median days from case report to interview attempt 1.7 days (0 – 5 days) 1.6 days (0 – 4 days) 1.6 days (0 – 4 days) 1.6 days
10c- Percent of cases with complete demographic data 88% (77 – 98%) 89.3% (72 – 100%) 97.7% (88 -100%) 91.7%
10d- Percent of cases with exposure history1 82.6% (69 – 91%) 92.6% (88 – 100%) 85.9% (55 -100%) 87.0%
10d.i- Percent of SSL cases with full shotgun or case exposure completed 80.8% (66 – 88%) 88.8% (86 – 93%) 82.5% (55 – 100%) 84.0%
10e- Percent of cases with serotype information 95.7% (94 – 99%) 93.9% (74 – 100%) N/A 94.8%
10f.- Percent of cases with PFGE information 95.6% (92 -100%) 96.1% (89 – 100%) 84.1% (28-100%) 91.9%
10f.i- Percent of cases with PFGE with complete epi data1 71.4% (40 – 89%) 82.3% (65 – 100%) 81.1% (57 – 100%) 78.3%
10g- Reasons for not interviewing cases 618 (10.3%) have reason for not interviewing 59 (6.8%) have reason for not interviewing 18 (14.5%) have reason for not interviewing 695 (9.9%) have reason for not interviewing
10g.i- Lost to Follow-up: Number; Percent 75.2 (43 – 143); 60% (14 – 99%) 6.3 (0 – 12); 38.3% (0 – 82%) 1 (0 -3); 23% (0 – 75%) 27.5; 40.4%
10g-ii. Refused: Number; Percent 7.5 (0 -20); 7.2% (0 – 16%) 1.7 (0 – 4); 14.3% (0 – 33%) 0 (0 – 0); 0% (0 – 0%) 3.1; 7.2%
10g.iii- Time lag too long: Number(Percent) 1.2 (0 – 3); 1% (0 – 3%) 0 (0 – 0); 0% (0 – 0) 0 (0 – 0); 0% (0 – 0%) 0.4; 0.3%
10g.iv- Other: Number; Percent 19.2 (0 – 61); 17.7% (0 – 49%) 1.8 (0 – 9); 2.8% (0 – 10%) 2.6 (0 – 4); 57% (0 – 100%) 7.9; 25.8%
11- Number of clusters 86.1 (55 – 115) 11.7 (0 -25) 4.1 (0 – 8) 34.0
11a- Median and range of cluster size(primary cases only) Median size: 2.2 (2 – 3)
Minimum size: 1.2 (1 – 2)
Maximum size: 24.3 (15 -34)
Median size: 2.2 (2 -3)
Minimum size: 1.4 (1 – 2)
Maximum size: 6.8 (5 – 9)
Median size: 1 (1 – 1)
Minimum size: 1 (1 – 1)
Maximum size: 1.8 (1 – 4)
Median size: 1.8
Minimum size: 1.2
Maximum size: 11.0
12- Number; Percent of clusters with cases in multiple states 32.9 (5 – 57); 36.6% (9 – 55%) 6.7 (0 – 12); 33.8% (0 – 67%) 3.7 (0 – 7); 74.2% (0 – 100%) 14.4; 48.2%
13a- Number; Percent of clusters with routine interview of cases1 78.1 (55 – 115); 91% (61–100%) 13 (6 – 25); 94.5% (67 – 100%) 4.7 (1 – 8); 91.7% (50 – 100%) 31.9; 92.4%
13b- Number; Percent of clusters with supplemental/targeted interviewing of cases 16.6 (1 – 55); 20% (2 – 75%) 6 (0 – 20); 33.2% (0 – 80%) 1.2 (0 – 3); 28.7% (0 – 50%) 7.9; 27.3%
13c- Number; Percent of clusters where an analytic epidemiologic study conducted (>10 Salmonella or STEC cases, >5 Listeria cases)1 3.1 (0 – 9); 3.3% (0 – 10%) 0.7 (0 – 3); 5.5% (0 – 25%) 0.2 (0 -1); 8.3% (0 – 50%) 1.3; 5.7%
13.d- Median duration ( in days) of epidemiologic investigation, from cluster notification to end of investigation/close-out 32.2 days (2 – 60 days) 38.8 days (8 – 60 days) 38.8 days (8 – 60 days) 42.4 days
14- Number; Percent of clusters with suspect vehicle/source identified1 8.6 (1 -20); 9.6% (2 – 19%) 4.3 (0 – 13); 24.5% (0 – 52%) 0.5 (0 – 1); 27.3% (0 – 100%) 4.5; 20.5%
15- Number; Percent of clusters with confirmed vehicle/source identified1 3.3 (0 – 7); 5.3% (0 – 11%) 2 (0 – 8); 9.2% (0 – 32%) 0.3 (0 – 1); 10.7% (0 – 50%) 1.9; 8.4%
16- Number; Percent of clusters with identified vehicle/source with:
a. Exclusion of ill person(s) 0.4 (0 – 1); 11.6% (0 – 50%) 2.3 (0 – 6); 20.7% (0 – 33%) No cumulative data available2 0.9; 10.8%
b. Remediation or closure 0.7 (0 – 3); 12.5% (0 – 50%) 2.5 (0 – 7); 29% (0 – 50%) 0.3 (0 – 1); No cumulative data available2 1.2; 13.8%
c. Educational campaign 2 (0 – 5); 35% (0 – 100%) 3.7 (0 – 10); 24.3% (0 – 48%) No cumulative data available2 1.9; 19.8%
d. Media/public messaging 3.3 (0 – 8); 21.6% (0 – 56%) 3.3 (1 – 9); 33.7% (25 – 43%) 0.7 (0 – 1); No cumulative data available2 2.4; 26.8%
e. Regulatory action (recall, hold) 2.5 (0 – 5); 35% (0 – 100%) 2.5 (0 – 5); 33% (0 – 75%) 0.7 (0 – 1); No cumulative data available2 1.9; 31%
17- Number; Percent of clusters linked to a restaurant/food establishment with EHA1 5.4 (0 – 16); 35% (0 – 100%) 2.5 (0 – 7); 39.2% (0 – 100%) 0.3 (0 – 1); 25% (0 – 100%) 2.7; 33.1%
18- Number; Percent of clusters with food/environmental sample collected for testing1 3.7 (1 – 10); 4.4% (1 – 14%) 2.2 (0 – 6); 13.5% (0 -29%) 0.5 (0 – 1); 12.8% (0 – 50%) 2.1; 10.2%
19- Number; Percent of clusters where EH, Ag, regulatory, or food safety program staff contacted1 15.7 (1 – 43); 18.1% (2 – 48%) 4.2 (0 – 11); 24.3% (0 – 52%) 1 (0 – 4); 20% (0 – 57%) 7.0; 20.8%
20- Number; Percent of outbreaks with NORS form completed1 6.7 (1 – 16); 59.7% (2 – 100%) 7.7 (2-17); 76% (67-81%) No cumulative data available2 7.2; 67.85%

1 Minimum reporting requirement for FoodCORE Centers

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

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