Probable Cooling Tower Linked to Legionnaires’ Disease Outbreak
There have been 78 confirmed cases and 2 deaths in the current Victorian outbreak.
Victorian authorities have pinpointed a cooling tower as the likely source of the Legionnaires Disease outbreak in the state.
As of 5 p.m. on Aug. 5, the health department confirmed 78 cases and 10 suspected cases of Legionnaires disease in just a week and a half.
Health authorities in Melbourne’s western suburbs have been working tirelessly to identify the source of the outbreak.
“The tower was disinfected within 24 hours of being visited on July 30,” Looker said according to The Epoch Times.
“Our rapid investigation located the likely source, tested, and disinfected it within a few days.”
Legionnaires’ disease is an urgent notifiable condition in Victoria, mandating doctors to report cases to the Health Department upon diagnosis.
“All cases have visited or reside in metropolitan Melbourne. Adults over 40 years, especially those with other medical conditions, compromised immune systems, or who smoke, are at higher risk. Those with symptoms should seek urgent medical care.”
The Victorian health department has seen a significant surge in case numbers since July 26.
Testing Recommended
The Victorian health department urges healthcare professionals to have a high index of suspicion for Legionnaires disease in patients with symptoms and to conduct testing.
In advising to request urgent urinary antigen testing through normal pathology providers if Legionnaires’ disease is suspected, Looker emphasized ordering Legionella culture and PCR on sputum or respiratory fluid samples expediently.
Cooling tower operators in Melbourne have been reminded to stay compliant with tower testing, servicing, and auditing.
What are the Symptoms?
Legionnaires disease is a severe form of pneumonia caused by Legionella bacteria, commonly found in water systems like hot tubs, cooling towers, fountains, and plumbing systems.
In addition, the disease can lead to less common symptoms such as nausea, vomiting, diarrhea, and confusion.
High-risk groups for the disease after exposure to the bacteria include smokers, individuals over 40, those with chronic lung disease, weakened immune systems, or other underlying medical conditions like chronic heart, liver, or kidney disease, and diabetes.
“Legionnaires’ disease is not known to spread between people. The symptoms are similar to other infectious diseases, so individuals should wear a mask until they receive test results to protect others,” the health department advises.
Victoria Health emphasized that while Legionnaires disease cases are not uncommon in the state, the recent sharp increase is cause for investigation to reduce cases and public health risks.
The health department regulates cooling systems in Victoria, as cooling towers can provide an ideal environment for Legionella bacteria growth, especially if water remains stagnant.
The New South Wales Health department notes that about 10% of people with Legionnaires’ disease die despite treatment.
“The fatality rate is not linked to whether the person acquired the infection from an outbreak or not, but by the severity of the outbreak based on the number of affected patients,” the department stated.
Additionally, the CDC notes that most healthy individuals exposed to Legionella bacteria do not become ill.