Public Health Institute of Split, Split, Croatia.
Arh Hig Rada Toksikol. 2011 Dec;62(4):335-40. doi: 10.2478/10004-1254-62-2011-2111.
The purpose of this study was to compare the quality of hot water between eleven hotels in the Split-Dalmatia County, Croatia that are open year round and 10 summer season hotels and retirement homes with irregular use of water. We took 122 samples between May and December 2009. Water temperature and free residual chlorine were measured in situ. Physical and chemical analysis included pH, electrical conductivity, and concentrations of iron, manganese, copper, zinc, calcium, and magnesium that were measured using atomic absorption spectrophotometry, while the Legionella species were determined using a cultivation method on buffered charcoal yeast extract agar. Differences in metal concentrations between the seasonal and year-round accommodation facilities were negligible, save for zinc that was higher in year-round (0.341 mg L(-1)) than in seasonal facilities (0.130 mg L(-1)). Samples from all year-round and six summer season hotels were negative to the Legionella species, but four seasonal facilities turned up with positive samples to Legionella pneumophila. Our study has demonstrated that water quality differs between year-round and seasonal accommodation facilities. These findings suggest that metal plumbing components and associated corrosion products are important factors in the survival and growth of Legionella species in water distribution systems.
本研究旨在比较克罗地亚斯普利特-达尔马提亚县 11 家全年开放的酒店和 10 家夏季营业、用水不规律的酒店和养老院的热水质量。我们在 2009 年 5 月至 12 月间采集了 122 个样本。现场测量水温与游离余氯。物理化学分析包括 pH 值、电导率以及使用原子吸收分光光度法测量的铁、锰、铜、锌、钙和镁的浓度，同时使用缓冲炭酵母提取物琼脂培养法确定军团菌种类。季节性和全年住宿设施之间的金属浓度差异可以忽略不计，但锌的浓度在全年（0.341mg/L）高于季节性设施（0.130mg/L）。所有全年和六家夏季酒店的样本均未检出军团菌，但四家季节性设施的样本中检出嗜肺军团菌阳性。本研究表明，水质在全年和季节性住宿设施之间存在差异。这些发现表明，金属管道组件和相关腐蚀产物是军团菌在水分配系统中生存和生长的重要因素。
