Key points

Gastroenteritis

• The seasonal GEA outbreak has entered the post-epidemic phase;

• The rate of emergency department visits for gastroenteritis is declining and is at a level comparable to that of previous seasons during the same period;

• Enteropathogenic Escherichia coli (EPEC) and non-adherent Escherichia coli (DAEC) have been identified in the majority of stool samples analyzed over the past 4 weeks, while the proportion of rotavirus—which has been declining for several weeks—fell below 5% in week 46;

• Sales of anti-diarrheal medications and oral rehydration solutions (ORS) in pharmacies are decreasing and are at the level of the highest sales rate for anti-diarrheal medications and ORS recorded during the same period in 2014–2022;

• Since the start of the GEA outbreak, 19 severe cases have been admitted to the intensive care unit at the Mayotte Hospital Center (CHM); no new cases admitted to the ICU have been reported since Week 36.

Bronchiolitis

• Emergency department visits remain at a low level, lower than in previous years. No circulation of respiratory syncytial virus (RSV), the primary cause of bronchiolitis.

Influenza

• The positivity rate for Influenza A(H3N2) remains stable at a high level; the epidemic phase began in week 44. In total, since the start of the epidemic, 9 severe cases of influenza have been admitted to the ICU.

COVID-19

• Increased circulation of the virus since week 43 after several months of very low circulation; 35 RT-PCR-positive cases in week 46. Three severe cases admitted to intensive care in weeks 45 and 46.