Species abundance and temporal variation of arbovirus vectors in Brownsville, Texas

Author:

Srinivasan Krithika12,Tapia Beatriz1,Rodriguez Arturo3,Wood Robert1,Salinas Jennifer J4

Affiliation:

1. University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America.

2. srinivasan.krithi@gmail.com

3. City of Brownsville Department of Public Health, Brownsville, Texas, United States of America.

4. Texas Tech University Health Sciences Center at El Paso, El Paso, Texas, United States of America.

Abstract

The recent outbreaks of the dengue fever and West Nile viruses and the looming threats of the Zika and chikungunya viruses highlight the importance of establishing effective, proactive arboviral surveillance in communities at high risk of transmission, such as those on the Texas–Mexico border. Currently, there are no approved human vaccines available for these mosquito-borne diseases, so entomological control and case management are the only known methods for decreasing disease incidence. The principal vectors, which include Culex quinquefasciatus, Aedes aegypti, and Ae. Albopictus, all have an established presence in South Texas. The public health response to most arbovirus outbreaks in the region has been reactionary rather than proactive. However, after the 2005 dengue outbreak and subsequent fatality, the City of Brownsville Public Health Department began collecting data on mosquito vector abundance and incidence. The objective of this study was to describe the various species of mosquitoes found in vector surveillance in Brownsville, Texas, during 2009–2013; quantify their prevalence; and identify any associations with temporal or weather-related variations. The results confirm a significant mosquito population in Brownsville in late winter months, indicating a high risk of arbovirus transmission in South Texas year-round, and not just until November, previously considered the end date of arbovirus season by state health services. The data from Brownsville’s surveillance program can help characterize local vector ecology and facilitate more proactive mitigation of future arboviral threats in South Texas.

Publisher

Pan American Health Organization

Subject

Public Health, Environmental and Occupational Health

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