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. 2017 Feb 24;14(3):222. doi: 10.3390/ijerph14030222

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Minimum spanning tree analysis of 73 Legionella isolates from several water sources in Wenzhou, China. These strains were isolated from 2009 to 2016. In the minimum spanning tree, the sequence types (STs) are displayed as circles. The size of each circle indicates the number of isolates within this particular type with the STs are shown beside the circles. The colors of the halo surrounding the STs denote types that belong to the same clonal group. CW: cooling tower; HW: hot springs; SW: shower water.