“Although Legionnaires’ disease primarily affects the lungs, it occasionally can cause infections in wounds and in other parts of the body, including the heart.  Most people catch Legionnaires’ disease by inhaling the bacteria from water or soil. Older adults, smokers and people with weakened immune systems are particularly susceptible to Legionnaires’ disease.  Although prompt treatment with antibiotics usually cures Legionnaires’ disease, some people continue to have problems after treatment.”

MAYO CLINIC