Abstract
On Jun 21, 2012, the Douglas County Health Department (DCHD) in Omaha NE was notified of an acute respiratory illness cluster among 32 counselors at city-sponsored day camps. Laboratory-confirmed histoplasmosis was diagnosed in one camp counselor. DCHD and the Nebraska Department of Health and Human Services (NDHHS) investigated the extent and source of the outbreak to prevent further infections. Histoplasmosis is a common fungal infection in the US and is a cause of respiratory illness outbreaks in endemic areas, which include areas in the midwestern states, and particularly the Mississippi and Ohio River valleys. Symptoms include fever, headache, and respiratory symptoms, although infected persons can remain asymptomatic.