Outbreak of Legionnaire’s Disease Caused by Legionella pneumophila Serogroups 1 and 13

Abstract

In Japan, hot springs and public baths are the major sources of legionellosis. In 2015, an outbreak of Legionnaires’ disease occurred among 7 patients who had visited a spa house. Laboratory investigation indicated that L. pneumophila serogroup 1 and 13 strains caused the outbreak and that these strains were genetically related.

Keywords

• Legionella pneumophila
• serogroup
• outbreak
• pneumonia
• spa house
• dual infection