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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 47

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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 47

The influenza (flu) activity level for Texas for the week ending November 24, 2007 is “local.” Local activity indicates that a single region of the state is experiencing an increase in ILI and has recent laboratory–confirmed influenza.

Reports were received from all 11 Health Service Regions (HSRs) for week 47. HSRs 1, 2/3, and 7 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 47, two hospital laboratories and the Texas Department of State Health Services (DSHS) Laboratory reported conducting a total of 350 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). No positive results were reported from these tests. Two reports of culture-confirmed influenza were received from other sources. The first culture was positive for influenza A (H3N2) and was submitted from a provider in Nueces County. The second positive culture was identified as influenza A (untyped) and was collected from a resident of Harris County. 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 47.

Eighty–one 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 47. Eighty providers reported seeing patients during week 47; of those, 46 (58%) providers reported seeing at least one patient with ILI. Of all patient visits during this week, 5.43% 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 12/3/2007 3:19:22 PM
Week # Reporting Age 0-4 Age 5-24 Age 25-64 Age over 64 Total ILI Total Patients % ILI
2007-40 83 239 150 147 48 584 20610 2.83
2007-41 89 267 255 207 58 787 25318 3.10
2007-42 86 274 270 261 50 857 25709 3.33
2007-43 83 368 287 208 47 910 26179 3.47
2007-44 92 391 274 204 55 924 27721 3.33
2007-45 85 409 314 241 39 1003 25406 3.94
2007-46 77 420 299 215 65 999 24099 4.14
2007-47 81 466 298 269 73 1106 20362 5.43


ILI Percentage in Texas Chart

The current U.S. flu weekly report (including a map) on influenza may be found at http://www.cdc.gov/flu/weekly/fluactivity.htm. Texas initially reported “sporadic” to the CDC as the flu activity level for week 47; however, the flu activity level was amended to “local” after new laboratory information was received late in the week. For this reason, the national influenza report may not reflect the most recent flu activity level reported by Texas.

For more information on flu surveillance activities in the State of Texas, please visit our main surveillance page.




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