Legionnaires’ disease may be described as a rather severe version of pneumonia. It is a severe lung inflammation resulting from infection caused by legionella, a bacterium that you have to inhale. It is usually patients with weakened immune systems, smokers and older people who contract Legionnaires’ disease by inhaling the bacteria.

This bacterium may even cause Pontiac fever that is much milder and resembles flu symptoms. Pontiac fever generally can clear up by itself, but untreated or undetected Legionnaires’ disease may be extremely fatal. It requires quick treatment with antibiotics, but there are patients who continue to suffer long after treatment is initiated.

Can Work ACs cause Legionnaires’ disease?

Legionella bacterium has the capacity to multiply rapidly indoors in any water system and this includes air conditioners. Many of the Legionnaires’ disease outbreaks have been linked to the cooling towers in building air conditioning units.

Symptoms of Legionnaires’ Disease

Symptoms can include mental changes, confusion, diarrhea, vomiting, nausea, GI troubles, loss of appetite, fatigue, chest pain, shortness of breath, bloody cough and mucous, fever of 104 degrees Fahrenheit, chills, muscle pain and headache. The lungs are primarily affected by legionaries’ disease, but sometimes wound infections and heart infections can result from this malady.


The best way to prevent the outbreak of these avoidable respiratory diseases is to ensure a safe and secure work environment inside the office. This includes checking the condition of the warm water systems and cooling towers and maintaining the AC system from time to time. Commercial air conditioning Brisbane should be consulted at regular intervals to fix all the commercial AC problems.

See also: Air Ducts

Air Conditioning at Work and Legionnaires Disease