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But bacteria which causes the potentially fatal Legionnaires' disease was found during tests on the heating system days before the new health centre was due to open.

His time investigating a wide range of outbreaks, from hantavirus to Legionnaires’ disease, provided him with extensive hands-on training and allowed him to work with “great mentors” who solidified his future in public health.

An outbreak of Legionnaires’ disease sickened 90 people and killed 12.

In earlier, related research that was published in January, the same scientists found that a different enzyme from a different illness-causing bacteria, Legionella pneumophila -- which causes a type of pneumonia called Legionnaires' disease -- actively breaks apart the same molecule during infection.

Two patients treated at the University of Washington Medical Center in Seattle’s Montlake neighborhood have been diagnosed with Legionnaires’ disease, and they may have gotten infected while they were being treated, according to UW Medicine.