Key points

Cholera

• Since March 18, 2024, 14 cases of cholera have been reported in Mayotte (13 were confirmed by PCR and one probable case tested positive via Rapid Diagnostic Test (RDT));

• Of the 13 cases confirmed by PCR, 4 are locally acquired;

• The nine PCR-confirmed cases and the case that tested positive via RDT were all imported from the Comoros or countries on the African continent;

• An outbreak is currently underway in the Comoros, with a particularly concerning situation in Anjouan.

Dengue

• The territory of Mayotte is currently experiencing the onset of a dengue outbreak, with 18 locally acquired cases identified;

• All locally acquired cases resided in Petite-Terre.

Leptospirosis

• From January 1 to April 21, 2024, 106 cases of leptospirosis were biologically confirmed, nearly double the 57 cases reported in 2023;

• Among the cases reported in 2024, one death was recorded;

• Since August 24, 2023, leptospirosis has been classified as a notifiable disease (ND).

Acute gastroenteritis (AGE)

• An upward trend in sales of anti-diarrheal medications and oral rehydration solutions (ORS) in sentinel pharmacies;

• No new severe cases were admitted to intensive care in S16-2024.

Bronchiolitis

• Post-epidemic phase since S13-2024 (March 25–31).

Influenza

• No ongoing epidemic.

Due to the lack of robustness in the coding of data on emergency department visits, the defined indicators do not allow for a relevant epidemiological analysis. These data on emergency department visits are therefore no longer presented.