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 has been declining for several weeks, standing at 4% in week 47;

• Sales of anti-diarrheal medications and oral rehydration solutions (ORS) in pharmacies continue to decline but remain at the highest sales rate for anti-diarrheal medications and ORS recorded during the same period in 2014–2022;

• Between Week 36 and Week 46, 20 severe cases were admitted to the intensive care unit at the Mayotte Hospital Center (CHM); 1 new case was admitted to the intensive care unit in Week 46.

Bronchiolitis

• Emergency room visits remain at a low level, lower than in previous years.

• Respiratory syncytial virus (RSV), the primary cause of bronchiolitis, began circulating at a low level.

Influenza

• The positivity rate for Influenza A(H3N2) remains stable at a high level; the transition to the epidemic phase occurred in week 44. In total since the start of the epidemic, 11 severe cases of influenza have been admitted to the ICU.

COVID-19

• Stable circulation of the virus since week 45 following several months of very low circulation; 27 RT-PCR-positive cases in week 47. Three severe cases admitted to intensive care in weeks 45 and 46.