Key Points

• Since March 30, 2019, 341 cases of dengue have been reported to the Health Surveillance, Alert, and Management Unit (CVAGS) of the Mayotte Regional Health Agency (ARS). Of these cases, 280 were confirmed by PCR, 50 by Rapid Diagnostic Test (RDT) and PCR, and 11 by RDT alone.

• Genotyping performed on cases reported in 2019 identified predominantly DENV1 viruses.

• The resurgence of dengue cases observed in Mayotte since week 44 of 2019 continues. In weeks 1 and 2 of 2020, 141 new confirmed cases of dengue were reported to the CVAGS.

• The majority of new cases reported since the beginning of week 01-2020 (63%) were located in the municipality of Mtsamboro (N=82/141).

• Particular vigilance is required during this rainy season, which favors an increase in the population of mosquitoes that transmit the disease.