Key Points

• Following Cyclone Chido’s passage over Mayotte on December 14, 2024, epidemiological surveillance was adapted to the capabilities of all stakeholders to assess the population’s health status.

• The Mayotte Hospital Center (CHM) reports 4,043 emergency room visits between December 14 and January 5, 2025. The majority of visits were related to trauma and digestive disorders.

• The ESCRIM field hospital has been operational since December 24 and reported 2,403 visits as of January 5, 2025. Since December 29, a clinic has been set up to support the ESCRIM, reporting 884 visits as of January 5. The majority of visits were related to trauma and digestive disorders.

• People who visited referral medical centers (CMRs) and associated centers last week (December 30, 2024, to January 5, 2025) sought care for trauma and digestive disorders.

• Transition to the pre-epidemic phase of influenza given the level of influenza virus circulation and the ongoing bronchiolitis epidemic.

• Significant increase in healthcare utilization for digestive disorders at the CHM: the positivity rate of samples testing positive for at least one pathogen was nearly 89% in week 2025-S01, rising steadily since week 2024-S51.

• Among the 237 households surveyed during community outreach visits between December 30, 2024, and January 5, 2025, 37% had at least one adult reporting psychological problems (stress, etc.), while 33% reported that at least one child had these same problems.

• The destruction of infrastructure and limited access to drinking water increase the risk of waterborne diseases (cholera, rotavirus gastroenteritis), leptospirosis, and respiratory infections such as bronchiolitis.