Bangladesh experiences intense mosquito activity during and after the monsoon season from June through October, when widespread flooding creates vast breeding habitats. Dhaka and Chittagong are dengue hotspots, while rural areas across the country carry malaria and filariasis risk. The Chittagong Hill Tracts have the highest malaria burden.
Dengue fever is the primary urban concern, with explosive outbreaks in Dhaka during the monsoon. Malaria (P. falciparum and P. vivax) persists in the southeastern hill districts. Chikungunya, Zika, Japanese encephalitis, and lymphatic filariasis are also significant concerns.
Aedes aegypti drives dengue transmission in urban areas, while Anopheles species carry malaria in rural and forested regions. Culex quinquefasciatus is linked to lymphatic filariasis and is abundant in densely populated areas with poor drainage.
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Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.