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Data (Legionnaires' Disease)

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Legionellosis Incidence Rate Map, Texas County by Year (jpg image)

  LegionellosisR19 LegionellosisR18 Legionellosis2016 Legionellosis2015 Legionellosis2014  Legionellosis2013 

              2019                       2018                       2016                         2015                       2014                       2013


Legionellosis2012 Legionellosis2011   Legionellosis2010  Legionellosis2009  

             2012                        2011                        2010                       2009

Legionellosis Cases and Incidence Ratesa for Texas, 2011-2020 
Year Case Count Incidence Rate
2020 3161.1
2019 421  1.4 
2018 415 1.4 
2017 327  1.1 
2016 270  1.0
2015 292  1.1 
2014 256  0.9 
2013 168 0.6 
2012 158 0.6
2011 111  0.4
aIncidence rates (IR) are calculated per 100,000 population. Population data are projected census data from Texas Demographic Center’s Texas Population Projections Program; 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, 2011-2020, Texas Notifiable Conditions.

Legionellosis Cases and Incidence Ratesby Age Group, 2016-2020                   
  2016    2017   2018 2019  2020
 Age Group Count IR  Count IR Count IR Count IR CountIR
<1 0 0.0 0 0.0  0 0.0 - 0.0 
01-04 0 0.0 0 0.0 0.0 0.0 0.0 
05-09  0 0.0 0 0.0 0.0 0.0 00.0 
10-14  0 0.0 0 0.0 0.0 0.0 
15-19  1 0.0 0 0.0 0 0.0 0.0 
20-29 5 0.1 9 0.2  16 0.4 12  50.1 
30-39 20 0.5 15 0.4  31 0.8 30  0.7 21 0.5 
40-49 27 0.7 53 1.5  43 1.1 38 1.0 461.2
50-59 67 1.9 63 1.8  96 2.7 98  2.8 651.9
60+ 150 3.1 187 3.7  229 4.4 238  4.5 1803.3 
Total 270 1.0 327 1.1 415 1.4 421  1.4  3171.1
aIR=age group-specific incidence rate per 100,000. 
Note: Per Emerging and Acute Infectious Disease Unit Data Suppression policy, beginning with data published after September 2021, subgroup case counts of 1-4 are not provided (-). Rates are not provided (-) when the Relative Standard Error exceeds 25% (n <16). Population data are projected population from Texas Demographic Center’s Texas Populations Projections Program; 2019 population projections were updated July 18, 2019, and 2018 & earlier population projections were from the prior version.                    
Legionellosis Cases and Incidence Ratesa for the Most Populous Texas Counties, 2019-2020

County

2019 2020
Cases IR CasesIR
BEXAR 41 2.0 25 1.2
BRAZORIA 1 - 00.0
CAMERON 4 - -
COLLIN 14 - 151.4
DALLAS 58 2.2 491.8
DENTON 16 1.8 182.0
EL PASO 13 - --
FORT BEND 2 - --
HARRIS 50 1.0 380.8
HIDALGO 14 - 80.9
MONTGOMERY 12 - 71.1
NUECES 2 - --
TARRANT 38 1.8 301.4
TRAVIS 19 1.5 251.9
WILLIAMSON 10 - 50.8
STATEWIDE TOTALS 421 1.4 3171.1
aIncidence rates (IR) are calculated per 100,000 population. Population data are projected population from Texas Demographic Center’s Texas Populations Projections Program, updated July 18, 2019.   
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, 2019, Texas Notifiable Conditions.    

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

Last updated August 25, 2022