Legionnaires’ disease cluster investigation in Sydney

Marianne Dowsett, Emma Quinn and Leena Gupta
Med J Aust 2017; 206 (7): . || doi: 10.5694/mja16.01144
Published online: 17 April 2017

We report an extensive investigation into a cluster of five confirmed cases of Legionnaires’ disease in Sydney’s Inner West in May 2016. The patients were aged 62–89 years, four were men, all were ex-smokers, and four had significant comorbidities, such as immunosuppression. Hospitalisations lasted a median of 6 days and one patient died. All patients tested positive for Legionella pneumophila serogroup 1 urinary antigens; however, L. pneumophila was isolated by culture in only one patient.

  • Marianne Dowsett1
  • Emma Quinn1
  • Leena Gupta2

  • 1 Public Health Unit, Royal Prince Alfred Hospital, Sydney, NSW
  • 2 Sydney Local Health District, Sydney, NSW


We thank the staff at Burwood, City of Canada Bay and Strathfield Councils, Health Protection NSW and the NSW Forensic and Analytical Science Service for their extensive assistance in this investigation.

Competing interests:

No relevant disclosures.


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