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Volume 19, Number 11—November 2013
Dispatch

West Nile Virus, Texas, USA, 2012

Kristy O. MurrayComments to Author , Duke Ruktanonchai, Dawn Hesalroad, Eric Fonken, and Melissa S. Nolan
Author affiliations: Baylor College of Medicine, Houston, Texas, USA (K.O. Murray,, M.S. Nolan); Texas Children’s Hospital, Houston (K.O. Murray, M.S. Nolan); Texas Department of State Health Services, Austin, Texas, USA (D. Ruktanonchai, D. Hesalroad, E. Fonken)

Main Article

Table

Demographic characteristics and attack rates of all West Nile virus cases reported to the Texas (USA) Department of State Health Services during the 2012 outbreak

Characteristic All cases, no. (%), n = 1,868 Attack rate*/100,000 population WNV fever, no. (%), n = 1,024 WNV neuroinvasive disease, no. (%), n = 844 Deaths, no. (%), n = 89
Sex
M 1,028 (55.0) 8.1 519 (50.7) 509 (60.3) 56 (62.9)
F 840 (45.0) 6.5 505 (49.3) 335 (39.7) 33 (37.1)
Age, y
<18 70 (3.8) 1.0 42 (4.1) 28 (3.3) 0
18–24 71 (3.8) 2.7 42 (4.1) 29 (3.4) 0
25–44 439 (23.5) 6.2 283 (27.6) 156 (18.5) 5 (5.6)
45–64 728 (39.0) 11.7 424 (41.4) 304 (36.0) 13 (14.6)
>65 560 (30.0) 20.0 233 (22.8) 327 (38.7) 71 (79.8)
Race/ethnicity
White, non-Hispanic 1,273 (68.1) 11.1 738 (72.1) 535 (63.4) 54 (60.7)
Black 117 (6.3) 4.0 43 (4.2) 74 (8.8) 1 (1.1)
White, Hispanic 318 (17.0) 3.2 134 (13.1) 184 (21.8) 22 (24.7)
Other/unknown 160 (8.6) 11.2 109 (10.6) 51 (6.0) 12 (13.5)

*Attack rates based on 2012 population estimates from the Texas State Data Center (3).

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References
  1. Lillibridge  KM, Parsons  R, Randle  Y, Travassos da Rosa  AP, Guzman  H, Siirin  M, The 2002 introduction of West Nile virus into Harris County, Texas, an area historically endemic for St. Louis encephalitis. Am J Trop Med Hyg. 2004;70:67681 .PubMed
  2. Nolan  MS, Schuermann  J, Murray  KO. West Nile virus infection among humans, Texas, USA, 2002–2011. Emerg Infect Dis. 2013;19:1379. DOIPubMed
  3. Texas State Data Center. Texas Population Projections Program [cited 2013 May 20]. http://txsdc.utsa.edu/Data/TPEPP/Projections/Index.aspx
  4. Murray  K, Baraniuk  S, Resnick  M, Arafat  R, Kilborn  C, Cain  K, Risk factors for encephalitis and death from West Nile virus infection. Epidemiol Infect. 2006;134:132532. DOIPubMed
  5. Nash  D, Mostashari  F, Fine  A, Miller  J, O’Leary  D, Murray  K, The outbreak of West Nile virus infection in the New York City area in 1999. N Engl J Med. 2001;344:180714. DOIPubMed
  6. Barber  LM, Schleier  JJ III, Peterson  RK. Economic cost analysis of West Nile virus outbreak, Sacramento County, California, USA, 2005. Emerg Infect Dis. 2010;16:4806. DOIPubMed
  7. Chung  WMBC, Joyner  SN, Hughes  SM, Fomby  TB, Luby  JP, Haley  RW. The 2012 West Nile encephalitis epidemic in Dallas, Texas. JAMA. 2013;310:297307. DOIPubMed
  8. Sejvar  JJ, Haddad  MB, Tierney  BC, Campbell  GL, Marfin  AA, Van Gerpen  JA, Neurologic manifestations and outcome of West Nile virus infection. JAMA. 2003;290:5115. DOIPubMed
  9. Nolan  MS, Podoll  AS, Hause  AM, Akers  KM, Finkel  KW, Murray  KO. Prevalence of chronic kidney disease and progression of disease over time among patients enrolled in the Houston West Nile virus cohort. PLoS ONE. 2012;7:e40374. DOIPubMed
  10. Lindsey  NP, Sejvar  JJ, Bode  AV, Pape  WJ, Campbell  GL. Delayed mortality in a cohort of persons hospitalized with West Nile virus disease in Colorado in 2003. Vector Borne Zoonotic Dis. 2012;12:2305. DOIPubMed

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Page updated: October 31, 2013
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