Legionnaires Disease: potting compost

I have read a newspaper article about an amateur gardener who repotted a plant using bagged compost. He then became ill and sadly died of Legionnaires Disease within 12 days. It was traced to the bag of compost he used. It is now advised to wear a face mask and gloves when using bagged compost and not to store it in a greenhouse as the Legionella can breed. It's now believed that this has occurred with more people in the past and up until now no one has realised.