Risk for the elderly Nursing homes have only recently started checking for Legionella

A new national report has revealed alarming deficiencies in Swiss nursing homes regarding legionella control, highlighting a growing risk for elderly residents. The findings were published in August 2026, following a comprehensive review conducted in 2025. The report found that half of the inspected nursing homes had inadequate self-monitoring systems, while nearly a quarter exceeded the maximum allowable legionella concentration levels. These revelations have prompted increased scrutiny and more rigorous inspections since early 2026, with some facilities implementing stricter protocols to mitigate the threat. The issue stems from the complex infrastructure of many nursing homes, which often feature large buildings with extensive water piping networks. The frequency of use varies depending on whether individual rooms are occupied, making it challenging to maintain consistent water flow and prevent stagnation, a key factor in legionella proliferation. In response, several institutions, including the Maison de Vessy in Geneva, have introduced stringent measures to ensure safe water conditions. At this facility, warm water is maintained between 55 and 60 degrees Celsius, with weekly thermal disinfection processes involving heating the water to 80 degrees to eliminate bacteria. Additionally, the system undergoes decalcification every five years to prevent mineral buildup. Raoul Schrumpf, general director of Maison de Vessy, explained that spot checks are conducted in the furthest rooms to confirm both proper water temperature and the absence of stagnant water within long pipelines. The facility consists of four separate buildings, each featuring kilometers of piping, underscoring the scale of the challenge faced by such institutions. In all rooms, staff ensure hot water runs for five minutes in both the shower and sink before and after extended absences, followed by ventilation to reduce moisture and potential bacterial growth. Legionella can cause two distinct forms of illness: the severe Legionnaires' disease and the milder Pontiac fever. Legionnaires' disease typically manifests two to ten days after infection, presenting symptoms such as fever, cough, muscle pain, and headaches, potentially leading to serious lung infections. Pontiac fever, on the other hand, causes flu-like symptoms that usually resolve within a few days. The risk of contracting Legionnaires' disease increases significantly with age, particularly among men, smokers, and individuals with weakened immune systems. Swiss legislation mandates that all social medical facilities conduct self-inspections, though these requirements became effective in 2017 or 2018. According to Patrick Edder, a chemist from the Geneva canton, the situation has improved since then. While there were numerous inspections in 2018 and 2019, very few facilities implemented self-monitoring procedures at the time. By 2023, almost all institutions had established self-inspection systems, although certain shortcomings remain. Edder noted that ongoing efforts continue to address these issues, ensuring compliance with safety standards and protecting vulnerable populations. As the focus on legionella prevention intensifies, further improvements in monitoring practices and infrastructure maintenance are anticipated. Nursing home administrators and health officials are working together to refine protocols, enhance transparency, and ultimately safeguard the well-being of elderly residents. With continued vigilance and adherence to regulatory guidelines, the goal is to minimize the risks associated with legionella contamination in residential care settings.