Volume 21, Number 7—July 2015
Results from the National Legionella Outbreak Detection Program, the Netherlands, 2002–2012
|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.