密歇根新闻广播 军团菌的历史（在线收听）

Health officials have reported a rise in cases of Legionnaires' disease this summer both nationally and here in Michigan.

It's been 42 years since the first outbreak of the mystery disease that eventually became known as legionellosis — and it took some serious medical detective work to figure it out.

Dr. Howard Markel, University of Michigan medical historian and PBS contributor, joined Stateside to give us some history on the disease.

Listen above to hear about the mysterious disease's growth during the country's bicentennial, how the case was eventually cracked, and why we're currently seeing a rise in cases of the disease again.