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Table 4 Legionellosis cases in health care facilities colonised with L. pneumophila sg 2–14 and/or L. pneumophila sg 1 MAb 3/1 negative

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
Total 9 39 48
  1. p = 0.7 according to Fisher’s exact test.