Epidemiological evidence has established a strong link with the Melbourne Aquarium as all but one are known to have visited the aquarium between 11 April and 25 April 2000. We would like to assure the public that Legionnaires' disease is not spread from person to person. So, there is no concern that the outbreak in Australia can spread to Singapore. However, anyone who has visited the Melbourne Aquarium during April this year and has developed the symptoms described below should seek medical attention immediately. Legionnaires' disease is caused by a bacterium, Legionella pneumophila.
Infection is acquired through the inhalation of water droplets contaminated by the bacteria.
The usual sources of infection are poorly maintained cooling towers and air conditioning systems although showers, spa baths and jacuzzis have been implicated. The illness can affect people of all ages but is most common among middle-aged and older people and those who are heavy smokers and drinkers, diabetics, people with chronic lung diseases or have impaired immunity. Early symptoms are similar to flu, and include headache, fever, chills, muscle aches and a dry cough. This is followed by shortness of breath as pneumonia develops. The onset of symptoms can be delayed up to ten days after exposure to the bacteria.