Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link

Volume 32, Number 4—April 2026

Research

Geographically Distinct Circulation of Genotype II and III St. Louis Encephalitis Virus, Texas, USA, 2009–2024

Alexander R. Kneubehl, Daniel P. Rehm, Michael W. Curtis, Bianca M. Wimmer, Bethany Bolling, Angie Broussard, Jeremy Vela, Jennifer Rocha, Lindsey Templeton, Maximea Vigilant, Courtney Standlee, Steven M. Presley, Job E. Lopez, and Shannon E. RoncaComments to Author 
Author affiliation: Baylor College of Medicine, Houston, Texas, USA (A.R. Kneubehl, D.P. Rehm, M.W. Curtis, J.E. Lopez, S.E. Ronca); Texas Children’s Hospital William T. Schearer Center for Human Immunobiology, Houston (A.R. Kneubehl, D.P. Rehm, S.E. Ronca); Texas Tech University Institute of Environmental and Human Health, Lubbock, Texas, USA (B.M. Wimmer, S.M. Presley); Texas Department of State Health Services, Austin, Texas, USA (B. Bolling); Harris County Public Health Division of Mosquito and Vector Control, Houston (A. Broussard, J. Vela, J. Rocha, L. Templeton, M. Vigilant, C. Standlee)

Main Article

Figure 1

Annual SLEV and WNV mosquito and human case activity from study of circulation of genotype II and III SLEV, Texas, USA, 2002–2024. A) Annual number of reported SLEV-positive and WNV-positive mosquito pools. B) Annual number of reported human SLEV and WNV infection cases. C) Annual number of reported human SLEV infection cases and number of SLEV-positive mosquito pools. D) Annual number of reported human WNV infection cases and number of WNV-positive mosquito pools. Scales for the y-axes differ substantially to underscore patterns but do not permit direct comparisons. Data from Texas DSHS Arbovirus Activity Reports (https://www.dshs.texas.gov/mosquito-borne-diseases/dshs-arbovirus-weekly-activity-reports) and Texas DSHS Arbovirus Field Surveillance Report 1985–2012 (https://www.dshs.texas.gov/laboratory-services/programs-laboratories/microbiology-unit/arbovirus-surveillance-program/arbovirus-field-surveillance-report). SLEV, St. Louis encephalitis virus; WNV, West Nile virus.

Figure 1. Annual SLEV and WNV mosquito and human case activity from study of circulation of genotype II and III SLEV, Texas, USA, 2002–2024. A) Annual number of reported SLEV-positive and WNV-positive mosquito pools. B) Annual number of reported human SLEV and WNV infection cases. C) Annual number of reported human SLEV infection cases and number of SLEV-positive mosquito pools. D) Annual number of reported human WNV infection cases and number of WNV-positive mosquito pools. Scales for the y-axes differ substantially to underscore patterns but do not permit direct comparisons. Data from Texas DSHS Arbovirus Activity Reports (https://www.dshs.texas.gov/mosquito-borne-diseases/dshs-arbovirus-weekly-activity-reports) and Texas DSHS Arbovirus Field Surveillance Report 1985–2012 (https://www.dshs.texas.gov/laboratory-services/programs-laboratories/microbiology-unit/arbovirus-surveillance-program/arbovirus-field-surveillance-report). SLEV, St. Louis encephalitis virus; WNV, West Nile virus.

Main Article

Page created: March 04, 2026
Page updated: April 15, 2026
Page reviewed: April 15, 2026
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external