Health

INFLUENZA ACTIVITY WAS AT “WIDESPREAD” LEVEL AGAIN IN SOUTH DAKOTA THE PAST WEEK

South Dakota Influenza summary for the week ending January 20, 2018 week 3

·      348 new confirmedcases of influenza were reported last week.   1,427 confirmed cases cumulative so far this season:  1,276 Influenza A and 151 Influenza B.  *Lab confirmed:  PCR, culture or DFA. The number of laboratories using rapid confirmatory tests has increased, which may account for some of the increase in confirmed cases observed this influenza season.

·      22.35% positive rapid antigen tests reported statewide (931 positives out of 4,166 individuals tested last week).    Total 15,824 tests performed so far this season.

·      43 new influenza-associated hospitalizations reported last week (Bon Homme, Brown, Butte, Codington, Davison, Hamlin, Hutchinson, Lake, Lawrence, Lincoln, McCook, Meade, Minnehaha, Oglala Lakota, Pennington, Tripp, and Turner counties).  Total of 238 hospitalizations so far this season.

·      Three influenza-associated deaths reported last week (Kingsbury, Marshall, and Turner Counties). Total of 12 deaths so far this season.

·      3.96% of clinic visits were for influenzalike illness (ILI), 30.04% of ILI visits were children 4 years of age and younger.

·      2.91% of K12 students were absent due to any illness, range 0% – 22% absent (157 schools reporting).

South Dakota Dept of Health

 

Season

Dominate virus

Deaths

Hospitalizations

Confirmed cases (Culture, PR, DFA)

Peak week

2017-2018

Pending

12

238

1427

Pending

        2016-2017

A(H3N2)

44

965

2,078

February 3rd week

2015-2016

A(H1N1)

9

161

786

March 2nd week

2014-2015

A(H3N2)

63

793

1,703

January 1st week

2013-2014

A(H1N1)

14

239

659

January 1st week

2012-2013

A(H3N2)

38

365

993

January 2nd week

2011-2012

A(H3N2)

17

164

505

March 3rd week

2010-2011

A(H3N2)

20

290

860

February 3rd week

2009-2010

A(H1N1) pandemic

24

431

2,303

October 2nd week

2008-2009

A(H1N1)

4

134

525

March 1st week

2007-2008

A(H3N2)

22

361

684

February 4th week

2006-2007

A(H1N1)

6

132

400

February 3rd week

2005-2006

A(H3N2)

11

 Not reportable

636

March 2nd week

2004-2005

A(H3N2)

42

 Not reportable

684

February 3rd week

Median (2004-2017)

 

20

290

860

February 3rd week

Influenza surveillance website:  http://flu.sd.gov.

National Synopsis:   Influenza activity increased in the past week in the United States.   49 States reported Widespread Activity for past 3 weeks. Nationally, 84.2% influenza A and 15.8% influenza B of 2,209 positive specimens tested in public health laboratories.

Influenza activity by state:

–    WIDESPREAD (highest level) influenza activity in 49 states; including South Dakota;

–    REGIONAL activity in 1 Guam;

–    LOCAL activity in  District of Columbia & Hawaii;

–    SPORADIC activity in US Virgin Islands;

–    NO activity in 0 states.

Our neighboring states:

–   WIDESPREAD activity: North Dakota, Minnesota, Iowa, Nebraska, Colorado, Wyoming, Montana and
South Dakota.

SD Dept of Health website:  http://doh.sd.gov/   SD Dept of Health Facebook:  www.facebook.com/SDHealthDepartment


Categories: Health, South Dakota

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