Why nosocomial infections rebounded in France over the period 2017-2022 – France

After falling steadily between 2001 and 2012, then stagnating from 2012 to 2017, the proportion of infected patients increased between 2017 and 2022 (+14.7%), notes Public Health France in a press release published this Friday. Compared to its European neighbours, France is in the middle range (17th out of 31 countries in 2017 for nosocomial prevalence). It will be necessary to wait until 2024 for the finalization of the surveys carried out in Europe in 2022.

Health authorities estimate that some 4,200 deaths are linked to nosocomial infections each year in France. The 2022 edition of this five-year survey by Public Health France (SPF) was conducted between May 15 and June 30, on a given day, among 1,155 health establishments (i.e. more than 150,000 patients).

The covid epidemic has weighed, directly or indirectly: “The proportion of infected patients is higher than that of five years ago, but nosocomial covid infections represent half of the increase”, notes Anne Berger-Carbonne, Head of the Healthcare Associated Infections and Antibiotic Resistance unit within the SPF.

In his eyes, “it is a very wide photograph which is not so bad in the wake of the terrible crisis of the covid. We expected worse”.

If we exclude nosocomial covid, the proportion of patients infected in 2022 remains on the rise (+7.5%) but “not significantly” compared to that estimated in 2017, according to the health agency. She thus observes that “compared to 2017, patients hospitalized in 2022 presented increased risks of infectious complications”, due to more vulnerable profiles or the use of invasive care devices.

In 2022, the activity of hospitals remained affected by the covid pandemic but also by the “ambulatory shift” of the health system, “so that people hospitalized were in a more serious situation”, in the eyes of Anne Berger-Carbonne .

The ambulatory shift is accompanied by a shortening of hospital stays, and long stays are reserved for the most serious cases.

four bacteria

Nosocomial infections are more often seen in intensive care units (almost one in four infected patients), which treat more vulnerable patients exposed to invasive devices (catheter, respiratory assistance, urinary catheter).

Urinary infections, linked to surgery, pneumonia, bacteraemia (presence of bacteria in the blood) remain the main manifestations of the scourge.

Four bacteria, including Escherichia coli and Staphylococcus aureus, are involved in nearly one in two cases of nosocomial infection in hospitals, almost as in 2017.

Another lesson from the survey: around one in six hospitalized patients receives antibiotic treatment, a proportion up 7.5% compared to 2017.

“It’s not a very good sign,” notes the specialist from Public Health France. Antibiotic resistance – the fact that some bacteria eventually become resistant to antibiotics – is indeed considered a major threat by global health authorities.

One in two patients is treated with antibiotics in intensive care, one in four in the medical or surgical departments, according to the SPF survey.

However, the context of covid may have changed the priorities, with less effort on the measured use of antibiotics. And “antibiotic resistance prevention teams have not been spared by the healthcare crisis,” notes Anne Berger-Carbonne.

For the public health agency, these results “encourage us to pursue preventive actions” for nosocomial infections by targeting them on the most frequent (urinary tract infections, pneumonia, surgical site infections, bacteremia). It is also necessary to “strengthen actions for the proper use of antibiotics”.