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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 49

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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

2007 - 2008 Texas Influenza Surveillance Information

Influenza Surveillance Report for MMWR Week 49

The influenza (flu) activity level for Texas for the week ending December 8, 2007 is “regional.” Regional activity indicates that two or more but less than half of the regions in the state are experiencing an increase in ILI and have recent laboratory–confirmed influenza.

Reports were received from all 11 Health Service Regions (HSRs) for week 49. HSRs 1, 2/3, 7, and 11 reported an increase in flu activity from the previous week. For a map of Health Service Regions, please visit the following website:

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

During week 49, 11 hospital laboratories throughout Texas and the Texas Department of State Health Services Laboratory reported conducting a total of 912 influenza tests (antigen, culture, and PCR) to the National Respiratory and Enteric Virus Surveillance System (NREVSSnew window ) sponsored by the Centers for Disease Control and Prevention (CDC). Seventy antigen detection tests from Bell, Bexar, Lubbock, and Nueces counties were positive for influenza A/untyped. Ten viral cultures positive for influenza were also reported in NREVSS, including the first influenza B of the season. In all, 13 reports of culture-confirmed influenza were received from NREVSS and other sources for the following counties:

 

Influenza A/H1 Influenza A/H3 Influenza A/untyped Influenza B
El Paso County Collin County Bell County Dallas County (2)
Williamson County Comal County Dallas County Galveston County
  Duval County   Harris County
  Erath County    
  Starr County    

The Air Force Institute for Operational Health (AFIOH) did not report any positive cultures for influenza virus from Texas bases. Additional positive results from point-of-care rapid flu tests were reported by providers throughout the state.

No institutional outbreaks or school closures were reported for week 49.

Eighty sentinel providers reported data to the U.S. Influenza Sentinel Provider Surveillance System (SPSN) on patients with influenza–like illness (ILI) and total patients seen for any reason during week 49. Fifty (62.5%) providers reported seeing at least one patient with ILI. Of all patient visits during this week, 3.30% were due to ILI. The ILI baseline for the West South Central Region (Arkansas, Louisiana, Oklahoma, and Texas) of the United States is 4.3% for the 2007–2008 season. The baseline is the mean percentage of patient visits for ILI during non-influenza weeks for the previous three seasons plus two standard deviations.


Percentage of Influenza–Like Illness (ILI) Reported by Sentinel Providers in Texas as of 12/19/2007 1:28:42 PM
Week # Reporting Age 0-4 Age 5-24 Age 25-64 Age over 64 Total ILI Total Patients % ILI
2007-40 84 256 163 151 49 619 21410 2.89
2007-41 88 264 255 207 58 784 25255 3.10
2007-42 86 274 270 261 50 855 25776 3.31
2007-43 85 368 290 208 47 913 26428 3.45
2007-44 95 391 276 206 55 928 28213 3.28
2007-45 87 411 314 243 39 1007 25665 3.92
2007-46 79 420 299 215 65 999 24540 4.07
2007-47 90 470 302 272 73 1117 22380 4.49
2007-48 82 490 284 299 74 1147 25520 4.49
2007-49 80 208 267 162 16 653 19792 3.30





 

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 May 19, 2010