Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
Volume 10, Number 3—March 2004
Research

Legionella Infection Risk from Domestic Hot Water

Paola Borella*Comments to Author , M. Teresa Montagna†, Vincenzo Romano-Spica‡§, Serena Stampi¶, Giovanna Stancanelli#, Maria Triassi**, Rachele Neglia*, Isabella Marchesi*, Guglielmina Fantuzzi*, Daniela Tatò†, Christian Napoli†, Gianluigi Quaranta‡, Patrizia Laurenti‡, Erica Leoni¶, Giovanna De Luca§, Cristina Ossi#, Matteo Moro#, and Gabriella Ribera D’Alcalà**
Author affiliations: *University of Modena and Reggio E., Modena, Italy; †University of Bari, Bari, Italy; ‡Catholic University in Rome, Rome, Italy; §University Institute of Physics Sciences, Rome, Italy,; ¶University of Bologna, Bologna, Italy; #S. Raffaele Hospital, Milan, Italy; **University Federico II of Naples, Naples, Italy

Main Article

Table 2

Chemical, physical, and microbiologic characteristics of the examined hot water samples

Characteristic Mean SD Minimum Maximum
Ca (mg/L)
85.0
33.0
0.1
252.0
Mg (mg/L)
17.6
10.6
0.1
90.1
Total hardness (°F)
28.3
11.4
0.3
100.1
Sampling temperature (°C)
41.9
12.4
17.0
65.0
Operating temperature (°C)
52.9
10.0
20.0
90.0

Geometric mean
Median
5th percentile
95th percentile
Fe (μg/L)
15.0
21.0
0.1
171.5
Mn (μg/L)
2.4
3.0
0.1
13.9
Cu (μg/L)
11.5
14.2
0.1
87.5
Zn (μg/L)
62.6
100.0
1
776.4
Free Cl (μg/L)
9.2
26.4
0.0
250.0
Oxidizability (mg/L O2)
0.63
0.64
0.24
1.70
Pseudomonas spp. (CFU/100 mL)a
139.2
223.6
1.0
1.0 × 104
Total count at 36°C (CFU/mL)a
98.6
95.0
3.4
1.7 × 103
Total count at 22°C (CFU/mL)a 50.4 30.0 4.0 3.9 × 103

aPositive samples only.

Main Article

Page created: February 08, 2011
Page updated: February 08, 2011
Page reviewed: February 08, 2011
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external