Influenza Surveillance


About Influenza Surveillance in Kansas

Kansas regulations do not require health care providers to report cases of influenza to the Kansas Department of Health and Environment (KDHE) except for pediatric deaths and novel influenza A infections. Instead, influenza activity is measured through surveillance networks including the U.S. Outpatient Influenza-like Illness Network (ILINet) and syndromic surveillance (ESSENCE).

ILINet

Percentage of Visits for Influenza-like Illness (ILI) Reported by ILINet Sites, Kansas, October 2021 – Present

ILINet Graph

ILINet is a collaboration between the Centers for Disease Control and Prevention (CDC) and state, local, and territorial health departments. ILINet in Kansas is represented by family practices, emergency departments, student health centers, and pediatric offices.

Each week, ILINet clinics determine the percentage of patients seen with influenza-like illness (ILI). Influenza-like illness is defined as fever (>100°F) with cough and/or sore throat. Data is collected from Sunday through Saturday of each week. Clinics are asked to submit the previous week's data by 11:00 AM each Tuesday.

Syndromic Surveillance

Percentage of Visits for Influenza-like Illness (ILI) Reported to ESSENCE, Kansas, October 2021 – Present

Syndromic Surveillance Graph

The Electronic Surveillance System for the Early Notification of Community-Based Epidemics (ESSENCE) is a syndromic surveillance system for capturing and analyzing public health indicators in near real-time for detection of disease outbreaks. Currently, 116 of 138 Kansas emergency departments share data. This is about 96% of all ED patient visits a year. More than 90% of reported ED visits are processed within 24-48 hours of the visit itself, and data is subject to change. Syndromic data does not include direct ddmits or transfers.

Influenza vs COVID-19

For County-Level Influenza vs. COVID-19 trends, and overall trends in respiratory illness + fever, please see the COVID-19 Data Dashboard. Data is updated weekly.

Laboratory Data

All nasopharyngeal and nasal swabs submitted to the Kansas Health and Environmental Laboratories for COVID-19 testing are tested on a multiplex PCR assay with includes influenza A, influenza B, respiratory syncytial virus, and rhinovirus/enterovirus targets. If either target is detected, further typing is performed on those specimens.

Number of Specimens Tested for Influenza at the Kansas Health and Environmental Laboratories by Week Ending Date, Kansas, October 2021 – Present

Week Ending Date Influenza A Influenza B Respiratory Syncytial Virus Rhinovirus/Enterovirus Negative
10/09/2021 0 0 0 0 1231
10/16/2021 0 0 0 0 1136
10/23/2021 0 0 0 3 1356
10/30/2021 0 0 0 0 1479
11/06/2021 0 0 0 0 1442
11/13/2021 0 0 0 0 1124
11/20/2021 0 0 0 0 1129

Pneumonia & Influenza Mortality

Percent of Deaths Associated with Pneumonia and Influenza by Surveillance Period, Kansas, October 2018 - Present

Percent of Deaths Associated with  Pneumonia and Influenza by Surveillance Period

 

Kansas Resident Pneumonia & Influenza Related Deaths by Selected Entire Flu Seasons
by Causal Relationship, Current Season is only Season to Date
Time Period based on Date of Death

  Season
2019-20 Season 2020-21 Season 2021-22 Season
N Percent N Percent N Percent
Influenza - Contributing Cause of Death Only 23 1.5 2 0.1 1 0.1
Influenza - Direct Cause of Death 118 7.6 4 0.1 0 0
Pneumonia - Direct Cause of Death 378 24.5 312 10.3 65 7.8
Pneumonia - Contributing Cause of Death Only 1026 66.4 2721 89.5 767 92.1
Total 1545 100.0 3039 100.0 833 100.0

Source: Kansas Department of Health and Environment - Division of Health
Bureau of Epidemiology and Public Health Informatics
Prepared November 22, 2021
Note: Influenza reporting seasons run from September 1 through May 31 of following year
Influenza and Pneumonia frequently occur together during a flu season resulting in reporting of both on death certificates.


 

Past Influenza Surveillance Reports

National Influenza Surveillance




[NW Kansas Region] [NC Kansas Region] [NE Kansas Region] [SE Kansas Region] [SC Kansas Region] [SW Kansas Region]