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[An outbreak of Legionnaire's disease associated with a Japanese spa]
T Nakadate1, K Yamauchi, H Inoue
1Third Department of Internal Medicine, Iwate Medical University.
Abstract:
From June 24 to July 5, 1996, 3 patients were admitted to the same hospital with atypical pneumonia. One of the patients, a 52-year-old man, demonstrated progressive pulmonary infiltrates and severe hypoxemia, and finally required mechanical ventilation. All 3 patients had elevated antibody titers for Legionella pneumophila serogroup 1, and had visited the same spa prior to the onset of their symptoms. On September 25, 1996 the district health department inspected the spa, and isolated Legionella pneumophila serogroup 1 from the facility's hot water tanks and outlets. Although it has been reported that many spas in Japan are contaminated with Legionellaceae, the outbreak we encountered suggests that Japanese spas, like whirlpool spas in Europe and North America, can be a source of Legionnaire's disease.
Insights
Japanese spas can be a source of Legionnaire's disease. Three patients contracted atypical pneumonia after visiting the same spa, which was later found to be contaminated with Legionella pneumophila.
Area of Science:
- Public Health
- Infectious Diseases
- Environmental Health
Background:
- Legionellaceae are known to contaminate various water systems.
- Spas have been identified as potential sources of Legionnaires' disease in Europe and North America.
Observation:
- Three patients presented with atypical pneumonia and elevated antibody titers for Legionella pneumophila serogroup 1.
- All patients had visited the same spa before symptom onset.
- Legionella pneumophila serogroup 1 was isolated from the spa's hot water tanks and outlets.
Findings:
- The outbreak was linked to Legionella pneumophila serogroup 1 contamination in a Japanese spa.
- This suggests a potential risk of Legionnaire's disease transmission through Japanese spas.
Implications:
- Japanese spas should be monitored for Legionellaceae contamination.
- Public health awareness regarding the risks associated with spa use is crucial.
- Further research into Legionella prevalence in Japanese recreational water facilities is warranted.