From: Virulence of Legionella pneumophila strains isolated from hospital water system and healthcare-associated Legionnaires’ disease in Northern Italy between 2004 and 2009
HCFs with reported cases
HCFs without reported cases
Total
HCFs colonised with L. pneumophila sg 1 MAb 3/1 negative
4
14
18
HCFs colonised with L. pneumophila sg 2-14
5
25
30
9
39
48