Waste That Spreads Disease: Solid Waste Mismanagement and Vector-Borne Outbreak Risk

James Whitaker ¹ , Emily Clarke ² , Oliver Bennett  ³ 

Abstract

Abstract
Uncontrolled solid waste accumulation creates breeding habitats for disease vectors and contributes to repeated outbreaks of mosquito-borne illness in densely populated communities. This environmental outbreak study evaluated the association between waste mismanagement and vector-borne disease risk across 22 high-density urban sectors from 2021 to 2024. The analysis included 1,964 reported vector-borne disease cases, entomological surveys from 312 waste accumulation sites, and environmental audits of local waste disposal practices.

Neighborhoods with irregular waste collection schedules had 2.7 times higher vector density indices than areas with routine collection (p<0.001). Open waste piles containing plastic containers, tires, and stagnant water supported Aedes breeding in 48.9% of surveyed sites. The incidence of dengue-like illness reached 22.6 cases per 10,000 population in high-waste neighborhoods compared with 9.4 per 10,000 in low-waste zones. Presence of uncollected waste within 50 meters of households increased outbreak risk by 2.3-fold (OR 2.3, 95% CI 1.8–2.9; p<0.001). Larval positivity rates were 41.7% in unmanaged sites versus 17.5% in managed environments.

Children and young adults accounted for 56.1% of outbreak-related cases, while 11.2% of patients required hospital observation. Areas with poor drainage and intermittent water supply showed the highest co-occurrence of breeding sites and transmission clusters. After community clean-up campaigns, improved waste collection, and vector control spraying, vector density fell by 37.4%, and new case incidence decreased by 29.6% over a 4-month surveillance period.

These findings indicate that solid waste mismanagement is not only an environmental problem but also a major outbreak amplifier. Integrating municipal waste control with vector surveillance and hygiene promotion may substantially reduce mosquito-borne disease transmission in urban settings.