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Council reviews simplified mosquito plan; staff may authorize spraying after two consecutive positive trap weeks
Summary
Environmental Services proposed reducing mosquito risk levels from five to three, moving to Risk Level 3 and considering ground spraying after a single trap location tests positive for two consecutive weeks, citing trap turnaround time and slow human-case reporting.
Michael Gagne of Environmental Services and Sustainability presented an update to the city's mosquito surveillance and response plan and recommended simplifying the plan from five risk levels to three.
Gagne said Denton's surveillance runs from May through October with weekly trapping done in partnership with the University of North Texas and laboratory analysis performed by the Texas Department of State Health Services. He explained that human West Nile virus cases can be reported up to six weeks after infection because of symptom development, medical testing and state confirmation, which makes human-case data a lagging indicator for operational response.
Under the proposed plan, the city would start the season…
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