Spring is the perfect time to be out in the garden. It’s also the perfect time for enthusiastic gardeners to risk
unwittingly releasing Legionnaires’ disease from the depths of their potting mix and compost.
With 23 cases of the disease already confirmed in the region this year, gardeners are being urged to take care with
potting mix and compost.
Last year there were 39 hospitalisations from Legionnaires’ in Canterbury.
Canterbury Medical Officer of Health Dr Ramon Pink says Legionnaires’ disease is a form of pneumonia.
“It’s caused by the Legionella bacteria that live in moist organic material and people can catch the disease by inhaling
airborne droplets or particles containing the bacteria.
“Gardeners are at particularly high risk of catching Legionnaires' disease as the bacteria thrive in bags of potting mix
and compost,” says Dr Pink.
In Canterbury there is typically a spike in cases in early November that can be attributed to the increased gardening
activity over Labour weekend, and with a promising forecast this Labour weekend now is the time for people to take the
necessary steps to avoid catching the disease.
Dr Pink says there are five simple actions gardeners should take to avoid getting legionnaires’:Wear a well-fitting disposable face mask and gloves before you begin gardening.Open potting mix or compost bags carefully by using scissors to cut off the top.Reduce dust by spraying some water into the bag.Work with potting mix or compost in a well-ventilated outdoor area.Wash your hands thoroughly after handling potting mix or compost and before touching your face or removing the mask.
“Legionnaires’ is a very serious illness and following these simple steps can be lifesaving,” says Dr Pink.
The illness may be mild but can sometimes be fatal. It is more common in older people, particularly if they smoke, have
poor immunity or a chronic illness. However, sometimes even healthy young people have died from legionella pneumonia.
Symptoms can include dry coughing, high fever, chills, shortness of breath, muscle aches, headaches and diarrhoea. If
you have these symptoms, you should contact your general practice team right away for advice and let them know you if
have been handling potting mix or compost.
For more information on Legionnaires’, visit: https://www.healthinfo.org.nz/index.htm?Legionnaires-disease-legionellosis.htm