Health

SOUTH DAKOTA INFLUENZA SUMMARY FOR THE WEEK ENDING MARCH 3, 2018

Influenza activity was atWIDESPREAD level in South Dakota again during the past week.  

·      313 new confirmedcases of influenza were reported last week.   4,423 confirmed cases cumulative so far this season:  3,651 Influenza A and 772 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.

·      27.29% positive rapid antigen tests reported statewide (402 positives out of 1,473 individuals tested last week).    Total 35,834 tests performed so far this season.

·      35 new influenza-associated hospitalizations reported last week (Brown, Brule, Charles Mix, Codington, Davison, Day, Deuel, Hutchinson, Lake, Lawrence, and Lincoln, Minnehaha, Moody, and Pennington counties).  Total of 600 hospitalizations so far this season.

·      One influenza-associated death was reported last week (Potter County). Total of 34 deaths so far this season.

·      4.27% of clinic visits were for influenzalike illness (ILI), 35.75% of ILI visits were children 4 years of age and younger.

·      2.19% of K12 students were absent due to any illness, range 0% – 10% absent (136 schools reporting).

South Dakota Dept of Health

 

Season

Dominate virus

Deaths

Hospitalizations

Confirmed cases (Culture, PR, DFA)

Peak week

2017-2018

A(H3N2)

34

603

4,423

February 3rdweek

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 has decreased in the United States.

Nationally, 47.1% influenza A and 52.9% influenza B of 663 positive specimens tested in public health laboratories.

Influenza activity by state:

–    WIDESPREAD (highest level) influenza activity in 34 states; including South Dakota;

–    REGIONAL activity in 12 States and Guam;

–    LOCAL activity in four states, and the District of Columbia;

–    SPORADIC activity 0 states;

–    NO activity in US Virgin Islands.

Our neighboring states:

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

–   REGIONAL activity: Minnesota

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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