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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

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Surveillance

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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 18th, 2006 is widespread. Flu activity was reported in all regions of the state.

Reports were received for all 11 Health Service Regions (HSRs) for week 7. An increase in flu activity was reported in HSRs 1, 4/5N, and 7. Activity remained about the same in HSRs 2/3, 6/5S, 8 and 11. No decrease in flu activity was reported in any of the 11 HSRs. For a map of Health Service Regions, please visit the following website:

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

During week 7, culture confirmed influenza A was identified in Bell, Brazos, Harris, McLennan, Travis, and Williamson Counties. The majority of flu cultured by the DSHS lab continues to be A/H3N2; however, in recent weeks, the number of influenza B has steadily increased. The Centers for Disease Control and Prevention (CDC) have further characterized the influenza isolates submitted by DSHS as A/California/07/2004-like (H3N2) and A/New York/55/2004-like (H3N2). A/California/07/2004-like (H3N2) is one of the A components of the current vaccine. A/New York/55/2004-like (H3N2) is antigenically equivalent to A/California/07/2004-like (H3N2).

Culture confirmed influenza B was identified in Dallas, Harris, Hill, McLennan, and Travis Counties. Dallas County continues to see the most culture confirmed influenza B. In fact, the only type of flu isolated by the DSHS lab to date from specimens collected during week 7 in Dallas County was influenza B. Two strains of influenza B have been identified by the DSHS lab in Texas; B/Hong Kong/330/2001-like (14 isolated) and B/Shanghai/361/2002-like (8 isolated).

No institutional outbreaks or school closures have been reported; however, an increase in influenza-like illness (ILI) was noted by Marshall ISD in Harrison County, and educational information on ILI is being sent home with students.

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 decrease in influenza-like illness (ILI) for the fourth consecutive week.


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

2005-48

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

47

297

399

287

28

1011

13520

7.47

2006-04

65

331

467

301

42

1141

18251

6.25

2006-05

59

281

416

264

44

1005

17525

5.73

2006-06

60

278

372

230

27

907

17497

5.18

2006-07

45

173

310

179

29

691

14150

4.88



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

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 18, 2006

(MMWR Week 7)
Statewide Influenza Activity

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



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