Health authorities monitor rising dengue and chikungunya cases in Mexico and Spain

Health authorities in Mexico and Spain are monitoring rising trends in mosquito-borne diseases, specifically dengue and chikungunya.

In Mexico, Quintana Roo has reported a significant increase in dengue cases, reaching 196 infections, which is triple the amount recorded during the same period in 2025. The state also recorded its first chikungunya cases in years. In other regions, Chiapas has seen a 57% decrease in dengue, while Acapulco faces a more aggressive serotype 02 variant. Mexican health officials have launched a national campaign to eliminate mosquito breeding sites in homes and public spaces.

Simultaneously, Spain has seen chikungunya cases nearly triple compared to last year, with 119 cases reported through mid-August. These infections are entirely imported, with significant numbers originating from Bolivia and Cuba. Epidemiologists in Spain are concerned about the potential for local transmission via the tiger mosquito, particularly in Catalonia, the Valencian Community, and Madrid. This follows a major chikungunya epidemic in Cuba that began in 2025, which resulted in thousands of suspected cases and dozens of deaths.