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    Infectious Disease Control Unit
    Mail Code: 1960
    PO BOX 149347 - Austin, TX 78714-9347
    1100 West 49th Street, Suite T801
    Austin, TX 78714

    Phone: 512 776 7676
    Fax: (512) 776-7616


    E-mail

week 5

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Surveillance

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surveillance
Influenza Influenza
(Flu)
ICD-9 487; ICD-10 J10,11
Related Topics: Protecting Yourself During the Cold and Flu Season, Avian Flu, Vaccine Preventable Diseases, Asthma and SARS
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2005 - 2006 Texas Influenza Surveillance Information

The flu activity level for the week ending February 4th, 2006 is widespread. Flu activity has been reported in all regions of the state for the sixth consecutive week.

Reports were received for all 11 Health Service Regions (HSRs) for week 5. An increase in flu activity was reported in HSRs 2, 3, 4/5N, and 7. Activity remained about the same in HSRs 8 and 11. A decrease in flu activity was reported in HSRs 1 and 9/10. For a map of Health Service Regions, please visit the following website:

http://www.dshs.state.tx.us/regions/state.shtm

During week 5, culture confirmed influenza A was identified in Bell, Bexar, Brazos, Collin, Coryell, Dallas, Harris, Lubbock, McLennan, Milam, Tarrant, Travis, and Wichita Counties. The majority of flu cultured by the DSHS lab continues to be A/H3N2. The Centers for Disease Control and Prevention (CDC) have further characterized the influenza isolates submitted by DSHS as A/California/07/2004-like and A/New York/55/2004-like. A/California/07/2004-like is one of the A components of the current vaccine. A/New York/55/2004-like is antigenically equivalent to A/California/07/2004-like.

Culture confirmed influenza B was identified in Collin, Dallas, and Tarrant Counties and also reported at Brooks City-Base in San Antonio (Bexar County) by the Air Force Institute for Operational Health.

The DSHS lab received approximately half the number of specimens collected during week 5 than the previous week. It is unclear if this represents a decline in influenza or is due to some other cause; however, interestingly, only 30% of those specimens collected during week 5 yielded influenza, as opposed to 61% collected during week 4.

No institutional outbreaks or school closures have been reported.

For more information on flu surveillance activities in the State of Texas, please visit the following website:

http://www.dshs.state.tx.us/idcu/disease/influenza/surveillance/

Data from the Sentinel Provider Surveillance Network (SPSN) indicates a slight decrease in influenza-like illness (ILI) from the previous week; however, fewer than half of the participating providers in Texas have reported at this time.

PERCENTAGE OF VISITS FOR INFLUENZA-LIKE-ILLNESS REPORTED BY SENTINEL PROVIDERS IN TEXAS

Week

# Reporting

Age 0-4

Age 5-24

Age 25-64

Age over 64

Total ILI

Total Patients

% ILI

2005-46

37

102

142

117

18

379

13824

2.74

2005-47

35

95

119

93

6

313

10897

2.87

2005-48

43

144

163

128

9

444

15657

2.83

2005-49

39

118

181

116

3

418

12894

3.24

2005-50

45

160

268

190

13

631

14410

4.37

2005-51

44

146

149

61

7

363

7797

4.65

2005-52

39

219

232

363

29

843

10140

8.31

2006-01

40

177

201

297

46

721

11399

6.32

2006-02

55

229

359

269

36

893

15487

5.76

2006-03

49

311

401

291

28

1031

13832

7.45

2006-04

63

295

454

291

45

1085

15637

6.93

2006-05

32

149

298

216

32

695

11176

6.21





Percentage of Physician Visits Due to Influenza-Like Illness, Texas Sentinel Providers Surveillance Network 2005-2006 Season


Statewide Influenza Activity For the Week Ending February 4, 2006

(MMWR Week 5)
Statewide Influenza Activity

*Influenza activity level corresponds to current MMWR week only and does not reflect previous weeks’ activity.


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Texas Department of State Health Services - Infectious Disease Control Unit
1100 West 49th Street, Suite T801, Mail Code: 1960 PO BOX 149347 - Austin, TX 78714-9347
(512) 458-7676 - Fax: (512) 458-7616 - E-Mail

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Last updated December 10, 2010