Influenza Surveillance


Percentage of Visits for Influenza-like Illness (ILI) Reported by ILINet Sites, Kansas, October 2014-September 2015 and the Previous Two Surveillance Periods*

Percentage of Visits for Influenza-like Illness (ILI) Reported by ILINet Sites

*ILINet sites may vary in number and type (student health, family practice, etc.) each season. Data from the previous two surveillance years are plotted according to week number corresponding to the 2014-2015 week ending date; for example, week 40 ended October 5, 2014, week 40 of 2013 ended October 6, 2012, and week 40 of 2012 ended October 7, 2011.

24 of 35 (69%) sites submitted data by the reporting deadline for the current week.


About Influenza Surveillance in Kansas

Kansas regulations do not require health care providers to notify KDHE when a patient is diagnosed with influenza.  Instead, influenza activity is measured through the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet), a collaboration between the Centers for Disease Control and Prevention (CDC) and state, local, and territorial health departments.

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, in the absence of a known cause other than influenza. Data is collected from Sunday through Saturday of each week. Clinics are asked to submit the previous week’s data by noon each Tuesday.

The information reflects data collected for the week ending the previous Saturday.  The above chart shows the percentage of ILI visits reported by week.  The percentage was calculated by dividing the number of patients seen with ILI at the clinics by the total number of patients seen and multiplying by 100.

The information on this chart may change over time, as ILINet sites may adjust their data submissions, and additional submissions may be received after Tuesday’s deadline.


About Influenza Testing in Kansas

The Kansas Health and Environmental Laboratories (KHEL) provided confirmatory testing for ILINet site patients with ILI, as well as for hospitalized patients throughout the state. Real-Time Polymerase Chain Reaction (RT-PCR) tests were used to analyze nasal and nasopharyngeal swabs for the presence of influenza virus.

About Influenza Testing in Kansas


About Respiratory Virus Testing in Kansas

In addition to influenza testing by PCR, the Kansas Health and Environmental Laboratories (KHEL) also tests all negative influenza specimens via a respiratory viral panel (RVP). Negative influenza specimens are tested with the RVP, which can probe for the following 12 viral targets: Influenza A, Influenza A subtype H1, Influenza A subtype H3, Influenza B, Respiratory Syncytial Virus subtype A, Respiratory Syncytial Virus subtype B, Parainfluenza 1, Parainfluenza 2, Parainfluenza 3, Human Metapneumovirus, Rhinovirus, and Adenovirus. The goal of RVP testing is to better understand which respiratory viruses are circulating in Kansas during influenza season.

For the 2014-15 season, Via Christi Laboratories in Sedgwick County will be sharing its RVP data with KDHE. Via Christi Laboratories’ RVP can detect Parainfluenza 4 and four different coronaviruses in addition to the 12 targets in the RVP panel used by KHEL.

Via Christi Respiratory Viral Panel Results (excluding all influenza)

 

October

November

December

January

Adenovirus

2

4

5

10

Coronavirus

2

2

26

60

Human Metapneumovirus

1

0

3

7

Parainfluenza

4

8

29

19

Rhinovirus/Enterovirus

33

61

61

50

Respiratory Syncytial Virus

0

4

27

43

Negative

172

191

334

447


KHEL Respiratory Viral Panel Results (excluding all influenza)

 

October

November

December

January

Human Metapneumovirus

0

0

0

1

Rhinovirus/Enterovirus

4

0

1

0

Negative

6

2

3

1

Please visit Children’s Mercy Hospital’s website to find RVP results from the Kansas City metro area.


Percent of Deaths Associated with Pneumonia and Influenza by Surveillance Period

Percent of Deaths Associated with Pneumonia and Influenza by Surveillance Period, Kansas, October 2014 – September 2015 and Previous Two Surveillance Periods*

Influenza Specimens Tested by KHEL


(1A) 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
2012-13 Season 2013-14 Season 2014-15 Season
N Percent N Percent N Percent
Pneumonia or Influenza - Contributing Factor in Death 1029 64.2 1087 65.3 616 63.5
Influenza - Direct Cause of Death 65 4.1 46 2.8 89 9.2
Pneumonia - Direct Cause of Death 510 31.8 531 31.9 265 27.3
Total 1604 100.0 1664 100.0 970 100.0

Source: Kansas Department of Health and Environment - Division of Health
Bureau of Epidemiology and Public Health Informatics
Prepared February 23, 2015
Note: Influenza reporting seasons run from September 1 through May 31 of following year

* The X-axis represents the week ending dates for the 2014-15 surveillance period. Data from the previous two surveillance periods are plotted according to the week number of the current season.


National Influenza Surveillance


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