Abstract Located in central Senegal, the Kaffrine region is crossed by the Dakar-Bamako Corridor and covered 31 health facilities in 2020, including the Diamagueune Health Post. The latter had just recorded a confirmed case of dengue fever (serotype 2) in September 2020. Therefore, to investigate this outbreak, despite the COVID-19 pandemic context, a cross-sectional study respecting ethical considerations was carried out in October 2020 using a systematic and One Health approach. Data were collected by a multisectoral and transdisciplinary team using observation, literature reviews, interviews and other specific tools, such as Biogents-Sentinel. Analysis used Excel 2010 ® , EpiInfo TM 7.2.4.0 ® and QGIS ® software. According to the WHO case definitions adapted for Senegal, the Kaffrine dengue outbreak confirmed two human cases. Further field investigation showed that of 91 suspected cases, 33% came from the Diamagueune Health Post, of which almost 50% had been found and sampled. Entomologically, 96.7% of the larval breeding sites found were positive, with the container (48%) and Breteau (64.6) indexes well above the epidemic risk thresholds. Yet Aedes aegypti was the main species collected in Kaffrine and already known as a competent dengue vector. Thus, the criticality of the risk of epidemic spread was 36%, making it unacceptable and calling for urgent action. Information © The Authors 2026
Keita et al. (Mon,) studied this question.