Rotavirus A epidemic continues

The rotavirus A-related gastroenteritis epidemic is ongoing in France, as reported in the epidemiological surveillance bulletin published by Santé publique France on October 19, 2026. Flu viruses are also circulating actively, prompting health authorities to maintain vigilance, especially for vulnerable groups such as infants, young children, and the elderly.

Rotavirus positivity rate declines

The positivity rate for rotavirus A has decreased from 32.6% in week 40 to 24.8% in week 41, which covers the period from October 5 to 11. The number of positive samples also slightly decreased, from 30 to 28, though the epidemic, which began in week 36, is still ongoing.

Other bacteria cause digestive infections

Other bacteria responsible for digestive infections are also circulating. Enteroaggregative Escherichia coli was detected in 43 samples, with a positivity rate of 38.1%, and enteropathogenic Escherichia coli was found in 36 samples, with a positivity rate of 31.9%. These bacteria can be transmitted through contaminated food and water.

Hospital visits decline but concerns remain

At the Centre hospitalier de Mayotte (CHM), 26 emergency room visits for acute gastroenteritis were recorded in week 41, a decrease of 21% compared to the previous week. Hospitalizations also declined from 13 to 9. However, an eight-month-old infant required admission to intensive care.

Preventive measures recommended

To limit the spread of infections, health authorities recommend regular hand washing, cleaning of surfaces, and sufficient hydration when experiencing diarrhea or vomiting. Signs of dehydration in young children require particular attention, as they can become severe quickly.

Flu A(H1N1) is progressing

Flu A(H1N1) is progressing, with influenza viruses now constituting a significant point of vigilance. Their circulation was detected early, as early as week 30, which is earlier than typical flu season, usually between December and March.

Flu positivity rate remains uncertain

In week 41, influenza viruses have become the majority among respiratory viruses detected at the CHM, surpassing rhinoviruses. The A(H1N1) subtype is predominant, with 17 positive samples and a positivity rate of 26.9%. However, the interpretation of these data is limited due to a two-week interruption of analyses caused by a shortage of reagents.

Healthcare burden continues

Respiratory infections continue to strain healthcare facilities. The proportion of consultations for respiratory diseases has exceeded 10% since week 36 in reference medical centers and dispensaries. Two children under one year of age have also been admitted to intensive care for bronchiolitis not linked to the respiratory syncytial virus (RSV).

Preventive actions advised

Health authorities recommend wearing a mask as soon as symptoms appear, hand washing, and ventilating enclosed spaces. The flu vaccine is particularly advised for the elderly, pregnant women, and people with certain chronic diseases to reduce the risk of severe illness.