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Group A Strep (GAS) Data

Group A Streptococcus Incidence Rate Maps for Texas by Year

2019   2018   2016   2015   2014   2013   2012   2011   2010   2009
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Reported Group A Streptococcus Invasive Disease Cases and Incidence Ratesa in Texas, 2012-2021 

Year Case Count  IR
2021 NR NR
2020 545 1.8
2019 971 3.3
2018 1,023  3.5 
2017 851  3.0 
2016 706  2.5 
2015 729 2.6 
2014 601 2.2 
2013 419 1.6 
2012 333 1.3 

aIncidence rates (IR) are calculated per 100,000 population. Population data are projected census data from Texas Demographic Center’s Texas Population Projections Program; 2021, 2020 and 2019 population projections were updated March 2022, and 2018 & earlier population projections were from the prior version.

Data Source: Texas NEDSS Finalized Data File, 2012-2021, Texas Notifiable Conditions.


Reported Group A Streptococcus, Invasive Cases and Incidence Ratesa by Age Groups in Texas, Years 2012-2019     

Age 2012 2013 2014 2015 2016 2017 2018 2019 
(Years) Case Count IR Case Count IR Case Count IR Case Count IR Case Count IR Case Count IR Case Count IR Case Count IR 
<1  1.7 1.4  13  3.2  10  2.4  13  3.1  0.9  15  3.5 11 
1-4  22  1.4  27  1.7  31  33  2.1  21  1.3  20  1.2  37 2.2 21  1.3
5-9  11  0.6  10  0.5  30  1.5  24  1.2  18  0.9  27  1.3  29 1.4 33  1.6 
10-14  0.3  0.2  0.4  13  0.6  13  0.6  11  0.5  11 0.5 13 
15-19  0.2  0.2  15  0.8  0.4  0.3  0.4  12 0.5 15 
20-29  27  0.7  31  0.8  31  0.8  41  52  1.3  53  1.3  56 1.3 66  1.5 
30-39 36  0.9  42  56  1.5  58  1.5  56  1.4  91  2.3  93 2.3 75  1.8
40-49 38  42  1.1  64  1.8  71  71  1.9  101  2.7  124 3.3 98  2.6 
50-59  58  1.8  84  2.5  106  3.1  135  3.9  134 3.8  162 4.6  181 5.1 173  5.0 
60+ 125  3.2 169  4.1  246  5.5 335  7.2  321  6.6  373  7.4  464 8.8  466 8.8 
Unknown - 0 - 0 0 0 - 0 1
Total 333 1.3  419  1.6 601 2.2  729 2.6  706  2.5  851  3.0   1023 3.5 971 3.3

aIncidence rates (IR) are calculated per 100,000 population. Population data are projected population from Texas Demographic center’s Texas Populations Projections Program; 2019 population projections were updated July 18, 2019, and 2018 population projections were from the prior version. Projected populations were used for 2012-2019.

Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after September 2021, conditions with statewide case counts of 1-4 are not provided (-). Rates are not provided (-) when the Relative Standard Error exceeds 25% (n<16). 


Streptococcus Group A Cases and Incidence Ratesa for the Most Populous Texas Counties, 2018-2019

County 2018 Cases  2018 IR 2019 Cases 2019 IR
BEXAR 97 4.9 73 3.6
BRAZORIA 8 - 5 -
CAMERON 7 - 9 -
COLLIN 31 2.9 20 2.0
DALLAS 98 3.8 99 3.7
DENTON 22 2.5 24 2.8
EL PASO 37 4.0 33 3.8
FORT BEND 10 - 6 -
HARRIS 108 2.3 110 2.3
HIDALGO 33 3.5 33 3.8
MONTGOMERY 10 1.6 17 2.9
NUECES 23 6.2 24 6.3
TARRANT 88 4.3 100 4.7
TRAVIS 78 6.4 56 4.4
WILLIAMSON 14 - 20 3.5
STATEWIDE TOTALS 1,023 3.5 971 3.3

aIncidence rates (IR) are calculated per 100,000 population. Population data are projected population from Texas Demographic Center’s Texas Populations Projections Program; 2019 population projections were updated July 18, 2019, and 2018 population projections were from the prior version.

Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after September 2021, rates are not provided (-) when the Relative Standard Error exceeds 25% (n <16).

Data Source: Texas NEDSS Finalized Data File, 2018 & 2019, Texas Notifiable Conditions.


For more data regarding this condition, please view our Infectious Disease Annual Reports or submit a Data Request.