The Finnish Institute for Health and Welfare (THL) and the Finnish Food Authority (Ruokavirasto) have issued a warning concerning the potential risk of legionella bacteria present in soil and compost products. Last year, Finland recorded an unprecedented rise in cases of pneumonia caused by legionella, with over 80 reported cases, and nearly half of those affected had prior contact with soil or soil products. The increasing frequency of these cases has raised concerns, especially regarding gardening and landscaping activities that involve soil products.

Legionella bacteria are naturally found in low numbers in freshwater and soil environments. They can thrive in various conditions, especially when soil and compost are improperly handled or stored. Due to the potential health risks associated with these bacteria, health organizations are urging the public, particularly those involved in gardening, to exercise caution and ensure safe practices when handling soil products. The increase in legionella cases has prompted calls for further investigation into the factors contributing to this worrying trend.

While the specific reasons for the rising cases linked to soil products are still unclear, the health agencies emphasize the importance of awareness and preventive measures. Citizens are encouraged to educate themselves on the risks associated with handling and using soil, particularly for individuals who may be more vulnerable, such as the elderly or those with pre-existing health conditions. As this public health concern continues to develop, further studies are likely to be conducted to identify the exact causes and how best to mitigate the risk of legionella exposure through soil and compost products.