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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

2007 - 2008 Texas Influenza Surveillance Information

Influenza Surveillance Report for MMWR Week 1

The influenza (flu) activity level for Texas for the week ending January 5, 2008 is “regional.” Regional activity indicates that two or more but less than 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 1. HSRs 2/3, 6/5S, 7, and 8 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 1, nine hospital laboratories throughout Texas reported conducting a total of 951 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). One hundred and fourteen antigen detection tests positive for influenza A/not subtyped were reported from Bell, Bexar, Collin, Harris, and Nueces counties. Two antigen detection tests positive for influenza B were reported from Bexar and Nueces counties. One PCR test positive for influenza A/not subtyped was reported from a patient residing in Lee County. Additional PCR tests positive for influenza A/not subtyped and influenza B were reported from Tarrant County. A total of 38 reports of culture–confirmed influenza were received from NREVSS, the Texas Department of State Health Services Laboratory, and other sources for the following counties:

 

Influenza A/H1 Influenza A/H3 Influenza A/not subtyped Influenza B
Bexar County Angelina County Bell County (4) El Paso County (2)
El Paso County (2) Bexar County Dallas County (6) Erath County
Hemphill County Erath County Harris County (12) Galveston County
    McLennan County (2) Harris County
      Randall County
      Travis County

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

No institutional outbreaks or school closures were reported for week 1.

Seventy–seven 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 1; of those, 50 (65%) providers reported seeing at least one patient with ILI. Of all patient visits during this week, 5.27% 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 (1/14/2008 2:49:17 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 90 470 302 272 73 1117 22380 4.99
2007-48 83 490 284 299 74 1147 25696 4.46
2007-49 83 221 279 162 16 678 20296 3.34
2007-50 79 241 247 126 16 630 18284 3.45
2007-51 64 158 186 185 26 555 14321 3.88
2007-52 71 165 191 191 22 569 11828 4.81
2008-01 77 167 273 329 18 787 14944 5.27





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