Legionella can cause Legionnaire’s disease, a rare form of pneumonia. Symptoms of the disease, also called Legionellosis, may include coughing, shortness of breath, muscle pain, fever and appetite loss. Symptoms usually emerge between two and 10 days after exposure to the bacteria.
People over the age of 50, smokers and those who have chronic lung disease or weakened immune systems are at the greatest risk of contracting the disease, according to the Centers for Disease Control and Prevention. It cannot be passed from person to person.