Georgia Outbreak Of Legionnaires’ Could Reach Historic Level

This undated file image shows a large grouping of Legionella pneumophila bacteria (Legionnaires’ disease). The Georgia Department of Public Health said that in addition to 11 confirmed Legionnaires’ disease cases linked recently to the Sheraton Atlanta, there are 55 “probable’’ cases.

Janice Haney Carr / Centers for Disease Control and Prevention via AP, File

Newly released state figures on Legionnaires’ cases linked to an Atlanta hotel suggest that the outbreak could become among the biggest in U.S. history.

The Georgia Department of Public Health said that in addition to the 11 confirmed Legionnaires’ disease cases, there are 55 “probable’’ cases.

The latter represent people who had illness consistent with Legionnaires’ disease, including pneumonia diagnosed by a clinician or chest X-ray, but have not received laboratory confirmation, Public Health said Monday. The number of probable cases can change based on additional testing and lab results.