Table 2 Environmental sources positive for Legionella bacteria
Sources | Samples | |||
|---|---|---|---|---|
Potential environmental sources | Number investigated | Number (%) positive | Number collected | Number (%) positive |
Case-patient homes | 7 | 1 (14.3) | 37 | 1 (2.7) |
Cooling towers | 43 | 24 (55.8) | 116 | 68 (58.6) |
Chillers | 6 | 5 (83.3) | 10 | 7 (70) |
Swamp coolers and sumps | 9 | 5 (55.6) | 12 | 5 (41.7) |
Decorative fountains and ornamental waterfalls | 22 | 2 (9.1) | 42 | 2 (4.8) |
Municipal, local and industrial water sources | 22 | 3 (13.6) | 39 | 6 (15.4) |
Supermarket misters | 8 | 2 (25.0) | 20 | 2 (10) |
Whirlpool spa | 1 | 0 (0.0) | 2 | 0 (0.0) |
Restaurant A | ||||
Fountain | 1 | 1 (100) | 4 | 4 (100) |
Other water sources | 4 | 0 (0.0) | 9 | 0 (0.0) |
Total | 123 | 43 (34.7) | 291 | 95 (32.6) |