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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 02

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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 2

The influenza (flu) activity level for Texas for the week ending January 12, 2008 is “widespread.” Widespread activity indicates that at least half of the regions in the state are experiencing an increase in influenza–like illness (ILI) and have recent culture–confirmed influenza.

Reports were received from all 11 Health Service Regions (HSRs) for week 2. All regions 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 2, five hospital laboratories throughout Texas reported conducting a total of 511 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). Ninety-five antigen detection tests positive for influenza A/not subtyped and four antigen detection tests positive for influenza B were reported from Bell, Bexar, Collin, Harris, and Nueces counties. Three PCR tests positive for influenza A/not subtyped was reported from patients residing in Bell, Hill, and Williamson counties; the PCR results for Bell and Hill counties were also confirmed by culture. One additional PCR test positive for influenza A/not subtyped was reported from Tarrant County. The Air Force Institute for Operational Health (AFIOH) reported one culture positive for influenza A/not subtyped from a Texas Air Force base in week 2. A total of 63 reports of culture–confirmed influenza were received from NREVSS, the Texas Department of State Health Services Laboratory, Scott and White Hospital Laboratory, Texas Children‘s Hospital Laboratory, AFIOH, and other sources for the following counties:

 

Influenza A/H1 Influenza A/H3 Influenza A/not subtyped Influenza B
Randall County Angelina County Bell County (9) Dallas County
Starr County Bexar County(2) Brazos County (5) El Paso County
Webb County (3) Dallas County (2) Dallas County Harris County (2)
  Hemphill County Harris County (7) Hemphill County (3)
  Jefferson County (4) Hill County Moore County
  Matagorda County (2) McLennan County (3) Randall County (2)
  Tarrant County (4) Travis County  
  Travis County Washington County  
  Webb County (2) Wichita County  

Additional positive results from point-of-care rapid flu tests were reported by providers throughout the state (see Texas map below).

The second influenza–associated pediatric death in Texas and in the United States for the 2007-2008 flu season occurred during MMWR week 2. The child, a 1–year–old resident of Harris County, had underlying medical conditions and had not been vaccinated for the current flu season. The child tested positive for influenza A/not subtyped by rapid flu test. Viral isolation results are pending.

No institutional outbreaks or school closures were reported for week 2.

Eighty–three 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 2. Eighty–two providers reported seeing patients during week 2; of those, 57 (69.5%) providers reported seeing at least one patient with ILI. Of all patient visits during this week, 6.74% 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 (1/21/2008 6:55:37 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 3.32
2007-43 85 368 290 208 47 913 26428 3.45
2007-44 95 391 276 206 55 928 28213 3.29
2007-45 87 411 314 243 39 1007 25665 3.92
2007-46 79 420 299 215 65 999 24540 4.07
2007-47 91 470 308 272 73 1123 22659 4.96
2007-48 84 490 287 299 74 1150 25970 4.43
2007-49 84 221 282 162 16 681 20577 3.31
2007-50 80 241 253 128 16 638 18574 3.43
2007-51 68 158 191 186 26 561 15497 3.62
2007-52 77 169 198 191 22 580 12393 4.68
2008-01 85 201 293 330 18 842 16156 5.21
2008-02 83 352 422 612 114 1500 22262 6.74


 

Influenza in USA Map

 

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