Week 51

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2007-2008 Texas Influenza Surveillance Information

Influenza Surveillance Report for MMWR Week 51

The influenza (flu) activity level for Texas for the week ending December 22, 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 influenza-like illness (ILI) and have recent culture–confirmed influenza.

Reports were received from all 11 Health Service Regions for week 51. HSRs 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:

Texas Health Service Regions Map

During week 51, seven hospital laboratories throughout Texas and the Texas Department of State Health Services Laboratory reported conducting a total of 439 influenza tests (antigen, culture, and PCR) to the National Respiratory and Enteric Virus Surveillance System (NREVSS) sponsored by the Centers for Disease Control and Prevention (CDC). Fifteen antigen detection tests positive for influenza A/untyped were reported from Bell, Bexar, and Harris counties. One PCR test positive for influenza A/untyped was reported from Bell County. One additional PCR test positive for influenza B was reported by Tarrant County. A total of 37 reports of culture-confirmed influenza were received from NREVSS and other sources for the following counties: 

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 51.

Forty–nine 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 51. Forty–eight providers reported seeing patients during week 51; of those, 34 (70.8%) providers reported seeing at least one patient with ILI. Of all patient visits during this week, 4.42% 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. 

 The map showing influenza activity in the United States for MMWR week 51:

The map showing influenza activity in the State of Texas for MMWR week 51:

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

2007-2008 Texas Influenza Surveillance Information - Flu Reports

For the week ending: 
10/06/07, 10/13/07, 10/20/07, 10/27/07, 11/03/07, 11/10/07, 11/17/07, 11/24/07, 12/01/07, 12/08/07, 12/15/07, 12/29/07, 01/05/08, 01/12/08, 01/19/08, 01/26/08, 02/02/08, 02/09/08, 02/16/08, 02/23/08, 03/01/08, 03/08/08, 03/15/08, 03/22/08, 03/29/08, 04/05/08, 04/12/08, 04/19/08, 04/26/08, 05/03/08, 05/10/08, 05/17/08

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