Medical Microbiology Department, University Hospital of Liège, Liège, Belgium.
Med Mycol. 2010 Nov;48(7):969-74. doi: 10.3109/13693781003639601.
A study was carried out over a 4-month winter period in order to assess the presence of filamentous fungi in the water distribution system of the University Hospital of Liège. A total of 197 hot and cold water samples were collected from the main water supply lines and from the taps at three different hospital sites. Overall, filamentous fungi were recovered from 55% and 50% of the main water distribution system and tap water samples, respectively, with a mean of 3.5 ± 1.5 colony forming units per 500 ml water. Nine different genera were identified, all belonging to the Hyphomycetes class. Aspergillus spp. were recovered from 6% of the samples of the water distribution system and A. fumigatus was the most frequently recovered species (66.6%). However, this species was not isolated from water taps. Fusarium spp. was predominant at one site, where it was found in 28% of tap water samples. No Aspergillus spp. but some Fusarium spp. isolates were identified in samples collected from high-risk units. Filters were introduced at the point-of-use in the haematology unit after completion of the study. The findings of the present study confirm the need for further documented studies to evaluate the safety of the hospital water system and to define new preventive measures.
一项为期 4 个月的冬季研究旨在评估列日大学医院供水系统中丝状真菌的存在。从三个不同医院地点的主供水管线和水龙头中采集了 197 份热水和冷水样本。总体而言，从主供水系统和自来水样本中分别回收了 55%和 50%的丝状真菌，每 500 毫升水中的平均菌落形成单位数为 3.5±1.5。鉴定出了九个不同的属，均属于丝孢纲。从供水系统的 6%的样本中回收了曲霉菌属，其中最常回收的物种是烟曲霉（66.6%）。然而，该物种并未从水龙头中分离出来。在一个地点，镰刀菌属占优势，在 28%的自来水样本中发现了该菌。在从高风险区域采集的样本中，没有发现曲霉菌属，但分离出了一些镰刀菌属。研究完成后，在血液学病房的用水点安装了过滤器。本研究的结果证实需要进一步开展有文献记录的研究，以评估医院供水系统的安全性，并确定新的预防措施。
