Legionella pneumophila levels and sequence-type distribution in hospital hot water samples from faucets to connecting pipes

•    Similar L. pneumophila concentrations in hospital faucets and hot water system pipes.

•    Hot water temperature increase: determining factor for Lp levels in water.

•    Dominance of two STs in first draw and flushed samples in building hot water.

•    Minimal impact of local conditions on strain selection and ST distribution.

•    Ability of STs to multiply in host cells and tolerate copper and high temperatures.

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