SCDHB

At this time of year gardeners begin to use compost, seed raising mix and potting mixes.

South Canterbury Medical Officer of Health, Dr Daniel Williams, says it's important to remember these materials are not sterile and there is a risk of being exposed to harmful bacteria, particularly Legionella which can cause a form of pneumonia (Legionnaires Disease).

Legionella is a common organism. It thrives in moist, warm conditions and causes disease when contaminated particles or droplets are inhaled. The disease can be severe, even fatal.

Symptoms may include dry coughing, high fever, chills, diarrhoea, shortness of breath, chest pains, headaches, excessive sweating, nausea, vomiting and abdominal pain. Anyone with these symptoms should seek prompt advice from their general practice or medical centre, and let their doctor know if they have been handling potting mix or compost recently.

Risk factors for contracting Legionnaires' disease include being over 50 years of age and having a long-term illness, particularly lung disease, having low immunity, or being a smoker. 

There are five simple steps to avoid catching Legionnaires disease from potting mix or compost:

• Open potting mix bags carefully using scissors, rather than ripping them.
• Wear a disposable face mask and gloves and open the bag away from your face.
• Do your potting in a well ventilated area outside.
• Dampen down the potting mix or compost with a sprinkle of water to stop dust  becoming airborne.
• Wash your hands thoroughly after handling potting mix and doing any gardening.

Most bagged mixes have information on the label. Please follow the safety advice given.

(Notifiable disease surveillance shows there were three cases of Legionnaires Disease notified to Canterbury health authorities in July, and one case in August.)

For more information contact:

Arlene Goss, Communications Manager

agoss@scdhb.health.nz

Ph 03 627 2395

027 276 4259