Health

SOUTH DAKOTA INFLUENZA SUMMARY FOR THE WEEK ENDING MAY 5, 2018

Influenza activity was at “Sporadic” level in South Dakota again during the past week.  

·      40 new confirmedcases of influenza were reported last week.   5,971 confirmed cases cumulative so far this season:  4,400Influenza A and 1,571 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.

·      10.64% positive rapid antigen tests reported statewide (25 positives out of 235 individuals tested last week).    Total 46,525 tests performed so far this season.

·      2 new influenza-associated hospitalizations reported last week (Brown and Turner counties).  Total of 867 hospitalizations so far this season.

·      Zero influenza-associated deaths were reported last week. Total of 62 deaths so far this season.

·      1.11% of clinic visits were for influenzalike illness (ILI),36.5% of ILI visits were children 4 years of age and younger.

·      1.53% of K12 students were absent due to any illness, range 0% – 9% absent (147 schools reporting).

South Dakota Dept of Health

 

Season

Dominate virus

Deaths

Hospitalizations

Confirmed cases (Culture, PR, DFA)

Peak week

2017-2018

A(H3N2)

62

867

5,971

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, 32.6% influenza A and 67.4% influenza B of 86 positive specimens tested in public health laboratories.

Influenza activity by state:

–    WIDESPREAD (highest level) influenza activity in three states;

–    REGIONAL activity in four  States and Guam and Puerto Rico;

–    LOCAL activity in 16 states;

–    SPORADIC activity in 25 states  and the District of Columbia; including South Dakota;

–    NO activity in two states & the US Virgin Islands.

Our neighboring states:

–   LOCAL activity: North Dakota, Minnesota, and Montana.

–   Sporadic Activity: Wyoming

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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