Weekly Influenza Report Week 5 - Indiana
[Pages:7]Weekly Influenza Report
Week 5
Report Date: Friday, February 09, 2018
The purpose of this report is to describe the spread and prevalence of influenza-like illness (ILI) in Indiana. It is meant to provide local health departments, hospital administrators, health professionals and residents with a general understanding of the burden of ILI. Data from several surveillance programs are analyzed to produce this report. Data are provisional and may change as additional information is received, reviewed and verified. For questions regarding the data presented in this report, please call the ISDH Surveillance and Investigation Division at 317-233-7125.
WEEKLY OVERVIEW
Influenza-like Illness - Week Ending February 3, 2018
ILI Geographic Distribution
Widespread
ILI Activity Code
High
Percent of ILI reported by sentinel outpatient providers
Percent of ILI reported by emergency department chief complaints
Percent positivity of influenza specimens tested at ISDH
7.62% 6.78% 77%
Number of influenza-associated deaths this season
167
Number of long-term care facility outbreaks this season
92
Number of school-wide outbreaks this season
3
SENTINEL SURVEILLANCE SYSTEM
Data are obtained from sentinel outpatient providers participating in the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet). Data are reported on a weekly basis for the previous Morbidity and Mortality Weekly Report (MMWR) Week by the sentinel sites and are subject to change as sites backreport or update previously submitted weekly data.
Percent of ILI Reported by Type of Sentinel Outpatient Facility, Indiana, 2017-2018 Season
MMWR Week 5 4 3
All Reporters %ILI (n) 7.62% (21) 8.1% (23) 7.53% (24)
Universities %ILI (n) 7.36% (10) 7.83% (11) 10.1% (11)
Non-Universities %ILI (n) 7.8% (11) 8.27% (12) 6.21% (13)
Percent of ILI Reported by Age Category in Sentinel Outpatient Facilities, Indiana, 2017-2018 Season
Age Category, years 0-4 5-24
25-49 50-64 65+ Total
Total Number of ILI 73 257 38 15 15 398
Percent of ILI 18.3% 64.6% 9.5% 3.8% 3.8% 100%
SYNDROMIC SURVEILLANCE SYSTEM
Data are obtained from hospital emergency department chief complaint data through the Indiana Public Health Emergency Surveillance System (PHESS). Data are reported on a weekly basis for the previous Morbidity and Mortality Weekly Report (MMWR) Week and are subject to change as hospitals backreport or update previously submitted weekly data.
Percent of ILI Reported in Emergency Departments by District, Indiana, 2017-2018 Season
Indiana District 1 District 2 District 3 District 4 District 5 District 6 District 7 District 8 District 9 District 10
Previous MMWR Week 5.92 6.0 6.26 7.26 9.55 4.91 5.5 6.99 5.04 6.2 4.91
Current MMWR Week 6.78 7.28 7.14 8.31 7.97 5.59 7.33 6.01 7.22 7.54 4.65
INFLUENZA-ASSOCIATED MORTALITY
Data are obtained from the Indiana National Electronic Disease Surveillance System (I-NEDSS). Influenzaassociated deaths are reportable within 72 hours of knowledge; however, not all cases are reported in a timely manner so data in this report are subject to change as additional cases are back-reported.
Number of Influenza-Associated Deaths for All Ages*, Indiana, 2017-2018 Season
Age Category, years 0-4 5-24
25-49 50-64 65+ Total
Season Total 1 5 8 25 128 167
*Due to changes in the reporting rule as of 12/2015, influenza-associated deaths are reportable if either laboratory confirmed or listed as cause of death on death certificate. Therefore, case counts are not directly comparable to previous seasons in which influenza-associated deaths were only reportable by laboratory confirmation.
Counties with 5 Laboratory Confirmed Influenza-Associated Deaths for All Ages, 2017-2018 Season
County Adams Floyd Lake Morgan St. Joseph Vanderburgh
Season Total 6 5 5 5 6 5
County Allen Hamilton Marion Shelby Tippecanoe
-
Season Total 13 9 13 6 5 -
VIROLOGIC SURVEILLANCE
Circulating Influenza Viruses Detected by ISDH Laboratory*, Indiana, 2017-2018 Season
Week 5
Season Total
Percent of
Percent of
PCR Result
Number
Specimens
Number Specimens
Received
Received
2009 A/H1N1pdm virus
11
7%
73
9%
Influenza A/H3 seasonal virus
83
54%
486
58%
Influenza A/H1 seasonal virus
0
0%
0
0%
Influenza B seasonal virus
26
17%
98
12%
Influenza negative
33
21%
170
20%
Inconclusive
0
0%
1
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