Legionnaires' Disease Updates and Information

The South Dakota Department of Health is investigating a general community increase of Legionnaires cases in the Sioux Falls area. South Dakota typically receives 8-15 case reports of Legionnaires' disease each year.

Sioux Falls Legionella Investigation Summary Report

Number of Confirmed Illnesses	Total
Total	16
Hospitalized	16
Deaths	1

Updated: 10/31/2018

Environmental Assessment Update:

The South Dakota Department of Health with support from the Sioux Falls Health Department and the Centers for Disease Control and Prevention, sampled 20 environmental sites across Sioux Falls during the week of September 24, 2018. The environmental samples collected tested negative for the Legionella bacteria that caused the Legionnaires' disease cases. No definitive cause for the recent increase in Legionnaires' disease was identified by the epidemiologic investigation or the environmental assessment and testing. The Department continues to monitor for additional Legionnaires' disease cases and will conduct environmental assessments and testing if warranted.