Workers should be aware of Legionella risks associated with handling potting mix and compost. Legionella bacteria, including Legionella pneumophila in man-made water systems (cooling towers, spas) and Legionella longbeachae in potting mix and compost, can pose a threat to human health.

Workers exposed to Legionella bacteria in potting mix and compost should be cautious, particularly with Legionella longbeachae present in these materials. Infection risks include breathing in dust and aerosols containing the bacteria and hand-to-mouth contact. While most exposed individuals don't fall ill, those over 50, smokers, or those with weakened immunity or chronic diseases face an increased risk. Diagnosed cases linked to work should be reported to Workplace Health and Safety Queensland. Workers handling these materials, such as gardeners and nursery workers, should minimize exposure by keeping the mix moist, handling it in well-ventilated areas, and wearing proper protective gear. Additionally, hygiene practices like handwashing and avoiding face-touching are crucial to reduce risks. Regularly washing work clothes and following manufacturer instructions on warning labels are essential preventive measures.