Emily
Editor, Senior Moderator
Since Legionaries' disease and Mount St. Helens are both in the news, here's an interesting article published in 2000. (The bacteria species were temporary residents of the lake from the sound of it.)
http://www.seattlepi.com/mountsthelens/lake10.shtml
http://www.seattlepi.com/mountsthelens/lake10.shtml