About our flu activity reporting MSDH relies upon selected sentinel health practitioners across the state to report the percentage of non-trauma visits consistent with an influenza-like illness (ILI: fever of 100°F or higher AND cough and/or sore throat). Also, providers are supplied with specimen collection kits. Samples are submitted to the Mississippi Public Health Laboratory for influenza PCR testing. Reports are used to estimate the state’s ILI rate and the magnitude of the state’s influenza activity. Reports represent only the distribution of flu in the state, not an actual count of all flu cases statewide. Information is provisional only and may change depending on additional reporting from sentinel providers. State ILI Surveillance For week 16 (04/14/2013- 04/20/2013), the overall state ILI rate (3.0%) decreased from last week (3.7%) and was lower when compared to this time last year (3.5%). | Figure 1 Total number of non-trauma patients treated by sentinel providers in the last three weeks.| Table 1 2012-2013 Influenza Season CDC Week Week Ending Non-trauma patients ILI symptoms ILI Rate (%) 16 Apr. 20 13807 411 3.0% 15 Apr. 13 14827 553 3.7% 14 Apr. 06 13908 617 4.4% 2012-2013 Influenza Report Week 16 April 14 – April 20, 2013
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2012-2013 Influenza Report Week 16 - MS State Department ... · 2012- 2013 Influenza Season | Week 16 Influenza Report| April 14 - April 20, 2013 Page 2 of 17 During week 16, one
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About our flu activity reporting
MSDH relies upon selected sentinel health practitioners across the state to report the percentage of non-trauma
visits consistent with an influenza-like illness (ILI: fever of 100°F or higher AND cough and/or sore throat). Also,
providers are supplied with specimen collection kits. Samples are submitted to the Mississippi Public Health
Laboratory for influenza PCR testing. Reports are used to estimate the state’s ILI rate and the magnitude of the
state’s influenza activity. Reports represent only the distribution of flu in the state, not an actual count of all flu
cases statewide. Information is provisional only and may change depending on additional reporting from
sentinel providers.
State ILI Surveillance
For week 16
(04/14/2013-
04/20/2013), the
overall state ILI rate
(3.0%) decreased
from last week
(3.7%) and was
lower when
compared to this
time last year (3.5%).
| Figure 1
Total number of non-trauma patients treated by sentinel providers in the last three weeks.| Table 1
2012-2013 Influenza Season
CDC Week Week Ending Non-trauma patients ILI symptoms ILI Rate (%)
16 Apr. 20 13807 411 3.0%
15 Apr. 13 14827 553 3.7%
14 Apr. 06 13908 617 4.4%
2012-2013
Influenza Report
Week 16
April 14 – April 20, 2013
2012- 2013 Influenza Season | Week 16 Influenza Report| April 14 - April 20, 2013
Page 2 of 17
During week 16, one district (2) had an increase in ILI activity, while five districts (1, 4, 6, 7, and 9) had
a decrease. Three districts (3, 5, and 8) remained about the
same. Information is provisional only and may change depending
on additional reporting from sentinel providers. | Table 2
Since week
35, the
number of
reported ILI
cases has
been highest
among
people in the
5 to 24 years
of age group,
followed by
those in the 0
to 4 years of age group. During Week 16, the number of reported ILI cases was highest among
individuals in the 0 to 4 years of age group. | Figure 2
MSDH District ILI Rates (%)
2012-2013
District Week 15 Week 16
State 3.7 3.0
1 2.1 0.9
2 1.9 3.2
3 5.9 5.6
4 5.2 4.7
5 2.2 2.0
6 9.3 6.5
7 3.1 2.5
8 2.1 1.8
9 3.8 3.1
2012- 2013 Influenza Season | Week 16 Influenza Report| April 14 - April 20, 2013
Page 3 of 17
The 2012-13 state ILI rate was above the national baseline, but was below the state baseline for week
16. | Figure 3
Mississippi ILI Rates 2010-2013 | Figure 4
2012- 2013 Influenza Season | Week 16 Influenza Report| April 14 - April 20, 2013
Page 4 of 17
Flu Testing Reports
From week 35 (week ending September 1st) through week 16 (week ending April 20th), 165 positive
influenza samples were identified by MSDH. 125 were influenza A and 40 were influenza B. 116 were
subtyped as influenza A (H3) and six were subtyped as influenza A (H1). Three samples did not have
subtyping performed. The last positive influenza sample identified by MSDH occurred in week 14
(week ending April 6th). | Figure 5
The influenza cases were identified from the following counties: Amite (2), Attala (3), Benton, Calhoun,