Toi Te Ora Public Health

29th September 2017

20170929 Protect Yourself From Legionnaires DiseaseProtect yourself from Legionnaires' disease when working with compost and potting mix 

Spring is a popular time to get back in the garden and plant yummy veggies.  While gardening at this time of the year is enjoyed by many, it's also important to keep yourself safe from a potentially serious illness.  Compost and potting mix often contain the bacteria which cause legionellosis, also known as Legionnaires' disease. Infection can occur when dust from compost and potting mixes is inhaled. 

Legionnaires' disease can vary in severity from a flu-like illness to severe pneumonia.  Symptoms include fever, chills, muscle aches and pains, shortness of breath and coughing.  Anyone who develops such symptoms within 2 - 10 days after handling compost or potting mix should see their doctor without delay.  Legionnaires' disease can be a serious illness that requires hospital treatment. 

The disease is more common in older people, smokers, people with underlying lung disease and other long term conditions such as diabetes.  Young, fit and healthy people are rarely affected.  The disease doesn't spread from person to person. 

"Gardeners can take simple steps to reduce the risk of getting Legionnaires' disease," says Medical Officer of Health, Dr Jim Miller.  "When working with compost and potting mix it's important to take measures to avoid inhaling dust.  It's a good idea to open potting mix by cutting rather than ripping the bag, and open the bag away from your face."  Dr Miller advises, "Water gardens gently using low pressure, and, where possible, avoid working in unventilated places such as closed sheds and greenhouses.  When potting plants, gently wet the soil or compost first to reduce dust, and wash your hands after handling soil or compost.  Use of a face mask is recommended especially when these other measures are not practical or possible." 

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For more information or comment, please contact:

Liz Thomas
Public Health Communications Advisor
Toi Te Ora Public Health
Phone: 07 306 0726 | Mob: 027 836 4892

Last updated: August 29, 2018