Missouri Weekly Influenza Surveillance Report
2017-2018 Influenza Season
Week 6: February 4 ? 10, 2018
All data are preliminary and may change as more reports are received.
Summary:
? The estimated influenza activity in Missouri is Widespread
.
? During Week 6, a total of 8,499 laboratory-positive influenza cases (4,652 influenza A, 3,725 influenza B, and
122 untyped) were reported. A season-to-date total of 92,863 laboratory-positive influenza cases (67,455
influenza A, 24,155 influenza B, and 1,253 untyped) have been reported in Missouri as of Week 6. The influenza
type for reported season-to date cases includes 73% influenza A, 26% influenza B, and 1% untyped. Nineteen
laboratory-positive cases of influenza (seven influenza A (H3), four influenza A (H1N1), and eight influenza B
(Yamagata)) were reported by the Missouri State Public Health Laboratory (MSPHL) during Week 6.
? Influenza-like illness (ILI) activity was above baseline for both the Missouri Outpatient ILI Surveillance Network
(ILINet) and the hospital emergency room visit chief complaint data reported through ESSENCE. The reported
percentage of visits for ILI was 9.61% (Figure 5) and 7.46% (Figure 7) through ILINet and ESSENCE
respectively.
The ILI data from a small number of sites located in the Northwest Region of the state is
temporarily unavailable in ESSENCE. Therefore, the ILI data for the Northwest Region should be interpreted
with caution. The percentage of respiratory specimens testing positive for influenza in Missouri laboratories
reporting to the National Respiratory and Enteric Virus Surveillance System (NREVSS) increased during Week 6
(Figure 6).
?
One hundred and thirty-six influenza-associated deaths have been reported in Missouri as of Week 6.
During
Week 5, 47 deaths involving Pneumonia and Influenza (P&I) were reported to the Bureau of Vital Records,
resulting in a season-to-date total of 1,077 P&I associated deaths in Missouri.
? Sixty-five outbreaks of influenza or ILI have been reported and 13 influenza or ILI-associated school closures
have been reported in Missouri as of Week 6.
? Influenza activity increased in the U.S. during Week 5. National influenza surveillance information is prepared
by CDC and is included in the weekly FluView report, which is available online
at
http://www.cdc.gov/flu/weekly/fluactivitysurv.htm.
...
http://health.mo.gov/living/healthcondiseases/communicable/influenza/pdf/week61718.pdf