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Map: Gastro still on rise in France, which areas are worst affected?

New figures show the regions where cases are highest and lowest

Gastroenteritis cases are increasing week on week in France Pic: Pixel-Shot / Shutterstock

Gastroenteritis case numbers continue to rise in France, with northern and southern regions particularly affected. 

Across France, there were 138 cases per 100,000 residents from October 18-24, up from 107 per 100,000 in the previous week and 90 per 100,000 in the week before that. 

This puts the “activity level” of gastroenteritis “close to those usually observed in this period,” according to Réseau Sentinelles, the national network for clinical surveillance. However, the rate is rising slightly more sharply than it would in a normal winter.

Pic: Sentinelles

During the winter of 2020/21, Covid lockdowns and the presence of social distancing measures reduced the incidence of gastroenteritis considerably, meaning that this year fewer people will have natural immunity to one or some of the bacteria and viruses which cause it.

The relaxation of lockdown and other barrier measures such as hand-washing is another explanation for this year’s higher rates. 

Gastroenteritis (known informally as la gastro in French) can affect people of all ages, causing vomiting and diarrhoea.

In the week of October 4-10, 140.3 stomach-bug admissions to French hospital emergency services were recorded per 10,000 people of all ages, according to Santé publique France. In the same period in 2019, 126 people with stomach bugs for every 10,000 people went to A&E.

During the week up to October 18, SOS Médecins were called to 5,260 cases of gastro-enteritis. 

Which areas are most affected? 

The French regions with the highest incidence of gastroenteritis are currently Provence-Alpes-Côte d’Azur with 175 cases per 100,000, Hauts-de-France with 179 cases per 100,000, Grand-Est with 200 cases per 100,000 and Ile-de-France with 140 per 100,000.

In Hauts-de-France, SOS Médecins were called to 802 gastroenteritis cases in the week up to October 22. 

Last week, cases had been more concentrated in the north and south east of France, but now stomach bugs are affecting the whole of the south, with Occitanie recording a rate of 115 per 100,000 people and Nouvelle-Aquitaine reporting 137 cases per 100,000.

The least affected regions are Brittany and Corsica, with 54 and seven cases per 100,000 respectively. In addition, Normandy, whose incidence rate was 159 per 100,000 last week, has now seen cases fall to 71 per 100,000.

Areas of central France have also thus far been largely spared from France’s rising gastroenteritis rates. 

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