Volume 21, Number 7—July 2015
Research
Results from the National Legionella Outbreak Detection Program, the Netherlands, 2002–2012
Jeroen W. Den Boer
, Sjoerd M. Euser, Petra Brandsema, Linda Reijnen, and Jacob P. Bruin
, Sjoerd M. Euser, Petra Brandsema, Linda Reijnen, and Jacob P. Bruin
Table 4
Characteristics of 105 clusters reported for patients with Legionnaires’ disease (n = 266), the Netherlands, 2002–2012*
| Characteristic |
Value |
| Location clusters (%)† | 98 (93.3) |
| Geographic clusters (%)‡ | 7 (6.7) |
| Mean no. patients per cluster (range) | 2.9 (2–11) |
| No. multiple municipal health services involved (%) | 50 (47.6) |
| Mean no. municipal health services involved (range) | 1.7 (1–5) |
*Study period was August 1, 2002–August 1, 2012.
†A location cluster is defined as cases reported within 2 years of each other in >2 persons who were reported to have been exposed to the same potential source of infection during the 2–14 days before symptom onset.
‡A geographic cluster is defined as cases in >3 persons who lived <1 km apart and whose infections were reported within 6 months of each other.
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