2008 - 2009 Texas Influenza Surveillance Information
Influenza Surveillance Report for MMWR Week 53
The influenza (flu) activity level for Texas for the week ending January 3, 2009 was “local.” Local activity indicates that a single region of the state is experiencing an increase in influenza-like illness (ILI) and has recent laboratory-confirmed influenza. During week 53, seventeen (4.4%) specimens tested by NREVSS laboratories in Texas were positive for influenza. The percentage of visits for influenza-like illness as reported by ILINet providers in Texas was below the regional baseline. Flu is occurring in the state at a low level.
Reports from Health Service Regions
Reports were received from all Health Service Regions (HSRs) for week 53. HSRs 2/3, 7, 8, and 11 reported an increase in flu activity compared to week 52. HSR 1 reported a decrease in flu activity compared to week 52. All other HSRs reported the same level of flu activity compared to week 52. For a map of Health Service Regions, please visit the following website: http://www.dshs.state.tx.us/regions/state.shtm
Laboratory Results
During week 53, eight hospital laboratories and public health agencies across Texas reported conducting a total of 386 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). Of the 338 antigen detection tests that were performed, 10 were positive for influenza A/not subtyped and 3 were positive for influenza B. The positive results were reported from Atascosa, Bell, Bexar, and Collin counties. One positive PCR test for influenza B was reported. A total of 11 reports of culture-confirmed influenza were received for the following counties:
| Influenza A/H1 |
Influenza A/H3 |
Influenza A/not subtyped |
Influenza B |
| Dallas County |
(none) |
Brazos County |
Harris County |
| Starr County |
|
Dallas County |
Starr County (2) |
| |
|
|
Tarrant County |
| Percentage of Influenza–Like Illness (ILI) Reported by Sentinel Providers in Texas as of 1/9/2009 1:38:15 PM |
| Week |
# Reporting |
Age 0-4 |
Age 5-24 |
Age 25-64 |
Age over 64 |
Total ILI |
Total Patients |
% ILI |
| 2008-40 |
77 |
84 |
133 |
127 |
22 |
366 |
20231 |
1.81 |
| 2008-41 |
77 |
114 |
163 |
124 |
19 |
420 |
20000 |
2.10 |
| 2008-42 |
78 |
107 |
156 |
90 |
7 |
360 |
19658 |
1.83 |
| 2008-43 |
78 |
120 |
152 |
106 |
20 |
398 |
19654 |
2.03 |
| 2008-44 |
79 |
136 |
199 |
103 |
26 |
464 |
20653 |
2.25 |
| 2008-45 |
77 |
110 |
111 |
122 |
27 |
370 |
20737 |
1.78 |
| 2008-46 |
72 |
110 |
106 |
103 |
23 |
342 |
19684 |
1.74 |
| 2008-47 |
74 |
137 |
143 |
122 |
19 |
421 |
19722 |
2.13 |
| 2008-48 |
78 |
131 |
132 |
125 |
37 |
425 |
16835 |
2.52 |
| 2008-49 |
72 |
136 |
154 |
147 |
24 |
461 |
19159 |
2.41 |
| 2008-50 |
70 |
125 |
143 |
105 |
28 |
401 |
18240 |
2.20 |
| 2008-51 |
61 |
155 |
163 |
168 |
24 |
510 |
16072 |
3.17 |
| 2008-52 |
63 |
150 |
139 |
137 |
13 |
439 |
12086 |
3.63 |
| 2008-53 |
50 |
116 |
109 |
132 |
31 |
388 |
11737 |
3.31 |
National Influenza Activity Map
The map showing influenza activity in the United States for MMWR week 53 is displayed below. The current U.S. flu weekly report may be found at: here.
 *This map indicates geographic spread and does not measure the severity of influenza activity.
For more information on flu surveillance activities in the State of Texas, please visit our main surveillance page.
*Influenza activity level corresponds to current MMWR week only and does not reflect previous weeks' activity.
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Last Updated: Thursday, May 14, 2009
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
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