世界卫生组织_粮农组织-世界卫生组织-世界动物卫生组织联合会对塞内加尔和毛里塔尼亚裂谷热（RVF）的快速风险评估：对公共卫生和动物健康的影响

Rapid risk assessment, acute event of potential public health concern Page 1 of 19 Version 2.0 Joint FAO/WHO/WOAH Rapid Risk Assessment of Rift Valley fever (RVF) in Senegal and Mauritania: Implications for Public Health and Animal Health Date and version of current assessment: 08 October 2025, v1 Date(s) and version(s) of previous assessment(s): NA Overall risk for human health and confidence Overall risk for human health Senegal and Mauritania Confidence in available information National Regional Global National Regional Global High Moderate Low Moderate Moderate Moderate Overall risk for animal health and confidence (based on information available at time of assessment) Overall risk for animal health Senegal and Mauritania Confidence in available information National Regional* Global National Regional Global High Moderate Low Moderate Low Moderate *Regional risk moderate except High in parts of Mali Risk statement This risk assessment is based on the current epidemiological and epizootic situation of Rift Valley fever (RVF) in Senegal and Mauritania, from 20 September through 8 October 2025.The risk assessment was conducted separately for each country. However, the findings indicate that the level of risk is the same for both countries across all levels, for both human and animal health. During this period, Senegal reported 119 confirmed human RVF cases, including 16 deaths, resulting in a case fatality rate (CFR) of 13.4%. Cases were recorded across eight health districts in three regions of Senegal, with the majority in Saint-Louis Region with 110 cases (92%) followed by Louga (four cases) and Matam (one case). The affected districts in Saint-Louis Region: Podor, Richard-Toll, Dagana, and Saint-Louis are located along the northern border with Mauritania along the Senegal River. The most affected age groups were 15- 35 years, accounting for 69 cases (58%), and 35-60 years with 34 cases (29%), with 77 % of cases occurring in males. Hemorrhagic symptoms were reported in 22 cases (18%) of which 13 resulted in death. Animal infections resulting in abortions and livestock mortality were also reported. On 23 September, 1122 blood samples and four abortion samples were collected from small ruminant herds in villages where human cases were reported. Of these, 36 samples tested positive across six herds. By 30 September, a total of 27 confirmed animal cases, two deaths have been reported to the World Organisation for Animal Health (WOAH) through the World Animal Health Information System (WAHIS). As of that date, five animal outbreaks have been confirmed in Saint-Louis Region, with four additional outbreaks expected to be included in a forthcoming follow-up report currently in draft. RVF is endemic in Senegal, with previous outbreaks affecting both humans and animals. The last confirmed human case before this outbreak occurred in January 2025 in Touba, located in the Diourbel region, while the last rec