HMN 2025: How Urban design and socioeconomic components affect dengue hotspots in Medellín

A brand new study led by researchers from the University of Eastern Finland and a group of worldwide collaborators exhibits that dengue outbreaks in Medellín, Colombia, are strongly linked to patterns of city growth and socioeconomic standing. The findings spotlight the potential of leveraging land-use planning and focused public well being methods to extra successfully {control} dengue in hyperendemic areas.

By analyzing greater than 40,000 georeferenced dengue instances recorded between 2010 and 2020, the researchers discovered that simply 26% of the town’s neighborhoods accounted for 50% of all infections. These “hotspot” areas had been predominantly positioned in low- and middle-income communities with built-up land cowl. In distinction, neighborhoods with increased socioeconomic standing and extra inexperienced house skilled far fewer outbreaks. The analysis is published in The American Journal of Tropical Medicine and Hygiene.

“What’s placing is that many of those hotspots aren’t remoted incidents. Some neighborhoods had been affected 12 months after 12 months—as much as seven years in some instances,” says Doctoral Researcher Juliana Pérez-Pérez, the research’s lead writer, from the University of Eastern Finland.

Using spatial statistics throughout 249 barrios in Medellín, the analysis group recognized each single-year and recurrent hotspots. These patterns diverse relying on whether or not the 12 months was categorized as epidemic, non-epidemic or extreme epidemic, however sure areas persistently appeared as high-risk zones.

Traditional dengue {control} applications have a tendency to use the identical measures throughout whole cities, however the findings counsel a extra strategic method is required. By combining epidemiological surveillance with insights from land use and city planning, public well being interventions will be extra focused and efficient.

“Dengue is commonly seen as a problem for the Global South, however the situations that favor its unfold—urbanization, social inequality and warming local weather—are actually more and more current elsewhere too,” Pérez-Pérez provides.

“This study exhibits that the spatial and social dynamics of dengue aren’t random. Recognizing how land use and socioeconomic standing form illness danger will help us not solely goal native responses in locations like Medellín, but additionally put together different areas, together with elements of Europe, for what might quickly change into a rising public well being problem.”

The study emphasizes the significance of integrating disciplines, reminiscent of public well being, ecology, city geography and spatial evaluation, to raised perceive and reply to the unfold of mosquito-borne illnesses in city environments.