Skip to main content

Table 1 Legionella spp. colonization of hot and cold water samples examined from ferries water distribution systems

From: Legionella species colonization of water distribution systems, pools and air conditioning systems in cruise ships and ferries

No. of samples/total (%)

Legionella spp.

L. pneumophila serogroup 1

L. pneumophila serogroups 2–14

Legionella non pneumophila

Hot water samples

    

No. of positive samples/total (%)

65/172 (37.8)

32/172 (18.6)

38/172 (22.1)

7/172 (4.1)

No. of samples with 500–999 CFU/L/total (%)

14/65 (21.5)

9/32 (28.1)

2/38 (5.3)

5/7 (71.4)

No. of samples with 103-9999 CFU/L/total (%)

31/65 (47.7)

19/32 (59.4)

20/38 (52.6)

1/7 (14.3)

No. of samples with ≥ 104 CFU/L/total (%)

20/65 (30.8)

4/32 (12.5)

16/38 (42.1)

1/7 (14.3)

Cold water samples

    

No. of positive samples/total (%)

17/97 (17.5)

11/97 (11.3)

6/97 (6.2)

2/97 (2.1)

No. of samples with 500–999 CFU/L/total (%)

9/17 (52.9)

7/11 (63.6)

1/6 (16.7)

1/2 (50.0)

No. of samples with 103-9999 CFU/L/total (%)

7/17 (41.2)

4/11 (36.4)

4/6 (66.7)

1/2 (50.0)

No. of samples with ≥ 104 CFU/L/total (%)

1/17 (5.9)

0/11 (0.0)

1/6 (16.7)

0/2 (0.0)