Dallas County Health and Human Services 2019–2020 ...
Dallas County Health and Human Services 2019?2020 Influenza Surveillance Report
Week 11 ending March 14, 2020
Epidemiologic Summary
? Healthcare seeking behavior may be affected by the ongoing COVID-19 outbreak, causing more people to seek care for symptoms of respiratory illness.
? Influenza activity decreased in Dallas County, with 9.9% of tests returning positive during week 11. ? Over the past week (Week 11), daily number of emergency department visits for chief complaints of
influenza-like illness in Dallas County slightly increased. Influenza-associated hospitalizations are continuing to decrease. ? RSV activity is low with 2.9% of tests from the surveillance sites reported as positive.
Table 1. Summary of Influenza Surveillance from Dallas County Hospitals and Hospital Laboratories
Week Ending
02/08
02/15
02/22
02/29
03/07
CDC Week
6
7
8
9
10*
Total Influenza PCR Tests
1,749
1,432
1,614
1,454
1,417
Number of positive PCR tests
404
323
294
198
175
Percent of positive PCR tests
23.1
22.6
18.2
13.6
12.4
Total Rapid Influenza Diagnostic Tests
2,778
1,824
2,199
1,773
1,531
Number of positive RIDTs
642
334
458
309
236
Percent of positive RIDTs
23.1
18.3
20.8
17.4
15.4
Total Influenza Tests Performed
4,527
3,256
3,813
3,227
2,948
Total positive influenza tests1
1,046
657
752
507
411
Percent positive influenza tests
23.1
20.2
19.7
15.7
13.9
Positive influenza A tests2
949
597
705
52
370
Positive influenza B tests
97
60
47
88
41
Non-differentiated influenza tests3
0
0
0
0
2
1 Includes positive rapid antigen, PCR, DFA, or culture results 2 Further subtyping is performed only by select hospital laboratories for specimens referred to DCHHS by institutions for PCR-testing 3 Non-differentiated refers to rapid test results which did not differentiate between influenza A and B
03/14
11* 1,727 146
8.5 1,865 210 11.3 3,592 356
9.9 298 58
0
9/08/19 ? Present 34,915 6,075
57,835 12,618
92,756 18,693
9,482 9,211
10
Table 2. Summary of Influenza Hospitalizations and Deaths from Dallas County Hospitals, Vital Statistics and Medical Examiner's Office
Week Ending
02/01 02/08 02/15 02/22 02/29 03/07 03/14 03/21 9/08/19?
CDC Week
5
6
7
8
9
10* 11* 12* Present
Influenza hospitalizations4
208 154 120 129 88
81
67
0
1,960
Influenza ICU admissions4
27
25
23
20
8
9
7
0
274
Confirmed pediatric deaths5
0
0
0
0
0
0
0
0
3
Confirmed adult deaths6
0
0
0
0
0
2
0
0
22
Possible influenza-associated deaths7
1
0
2
1
1
1
0
0
9
`
4 Reflects all influenza-associated hospitalizations reported from 14 hospitals located within Dallas County by week of any positive influenza tests.
5 Confirmed influenza-associated deaths of Dallas County residents ................
................
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