Legionnaire’s outbreak: we’ll never know the source

Final Report into 2012 Legionnaires’ Outbreak published but the source of the outbreak may never be known

legionnaires-disease

NHS Lothian, on behalf of the multi-agency Incident Management Team (IMT), has today published the final report​ into the 2012 Legionnaires’ outbreak which affected the south west of Edinburgh. The 68 page report goes into great detail – but the public heath professionals who produced the report are unable to pinpoint the source of the outbreak.

The report states: ‘As it has not been possible to identify the precise source of the Legionella bacteria that resulted in the death of four people, Crown Counsel has concluded that there is insufficient evidence to prosecute any person or organisation for the deaths.’

The Incident Management Team has concluded that the outbreak was caused by an aerosol release of Legionella pneumophila Sg1 Knoxville ST191 over a defined area of south west Edinburgh during May 2012. Although the Incident Management Team could not establish the specific source of the organism, it has concluded that: ‘the most likely source of this aerosol release was an industrial complex containing wet cooling towers in the north east of the affected area.’

Between late May and late June 2012, 56 people who had links to south west Edinburgh, were confirmed as suffering from Legionnaires’ disease. Four of these people died and the Health and Safety Executive, under the direction of the Crown Office and Procurator Fiscal Service Health and Safety Division carried out a full investigation into the cause.

The final report into the outbreak highlights that the locally coordinated public health, environmental health, scientific and clinical response helped protect the health of people living and working in south west Edinburgh and had a positive impact in preventing more people becoming seriously ill.

It has been published following the conclusion of all investigations into the outbreak.

Professor Alison McCallum, Director of Public Health and Health Policy, NHS Lothian said: ““I would once again express my sincere condolences to the families of those who died during this outbreak and the patients affected.

“The review of outbreak management and the subsequent public health research has provided valuable in enhancing the existing knowledge on Legionella outbreaks and control. This report allows us to share our experience and findings with other public health teams across the globe.”

2015 Final Report – Master 2015 Final 060815