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Investigation of Bacterial Contamination of Medical Machines with Water Tubes

水管医疗器械细菌污染调查

基本信息

批准号：
15590463
负责人：
HAYASHI Shunji
金额：
$ 2.3万
依托单位：
JICHI MEDICAL SCHOOL
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15590463/
关键词：
water tube medical machine bacterial contamination endoscope reprocessor water sterilizer dental unit atypical mycobacreria non-fermenting Gram-negative rods

项目摘要

In this study, we investigated bacterial contamination of medical machines with water tubes ; automatic endoscope reprocessors, water sterilizers, and dental units.We investigated bacterial contamination of the endoscope reprocessors used in Jichi Medical School Hospital. Atypical mycobacteria, methylobacteria, and non-fermenting Gram-negative rods(NF-GNRs) were isolated all the machines. We also investigated city water used in the hospital, and atypical mycobacteria and methylobacteria were isolated from city water. However, NF-GNRs were not isolated from city water. In addition, we investigated the endoscope reprocessors used in other hospitals and obtained similar results.We examined bacteriologically the water sterilizers used in our hospital. They had been used in order to supply germ-free water for hand washing. There are two types of water sterilizers ; Ultraviolet(UV) type and Filter type. UV type machines kill microorganisms in water by UV rays. Filter type machines remove mic … More roorganisms from water by filtration. The UV-type machines used in our hospital were all contaminated with atypical mycobacteria, methylobacteria, and NF-GNRs. The filter type machines whose filters had not been replaced regularly were also contaminated with the same bacteria. On the other hand, the filter type machines whose filters had been replaced regularly were not contaminated with bacteriaWe examined bacterial contamination of dental units. The dental units examined were all contaminated with the above bacteria. The contamination level of the machines was negatively correlated with their use-frequency. Disinfection of water lines of dental units was effective for the prevention of bacterial contamination.Our results indicate that medical machines with water tubes are commonly contaminated with bacteria. The bacteria species isolated in this study do not have strong pathogenicity. However, they are dangerous enough for compromised hosts. Thus, it is necessary to prevent and control of the bacterial contamination of the machines. Less

在本研究中，我们调查了带水管的医疗器械、自动内窥镜再处理器、水消毒器和牙科综合治疗机的细菌污染。我们调查了济济医学院医院使用的内窥镜再处理器的细菌污染。非典型分枝杆菌，甲基杆菌，和非发酵革兰氏阴性杆菌（NF-GNRs）的分离所有的机器。我们还调查了医院使用的城市用水，并从城市用水中分离出非典型分枝杆菌和甲基杆菌。然而，NF-GNRs并没有从城市水中分离出来。此外，我们调查了其他医院使用的内窥镜再处理器，并获得了类似的结果。它们被用来提供无菌洗手水。有两种类型的水消毒器;紫外线（UV）类型和过滤器类型。UV型机器通过紫外线杀死水中的微生物。过滤式机器去除麦克风 ...更多信息通过过滤去除水中的微生物。我院使用的紫外线机均被非典型分枝杆菌、甲基杆菌和NF-GNRs污染。没有定期更换过滤器的过滤式机器也被同样的细菌污染。另一方面，定期更换过滤器的过滤器型机器没有细菌污染。我们检查了牙科综合治疗台的细菌污染。检查的牙科治疗台均被上述细菌污染。机器的污染程度与其使用频率呈负相关。牙科综合治疗台水管消毒对预防细菌污染是有效的，我们的研究结果表明，医疗器械的水管是常见的细菌污染。本研究所分离的细菌均不具有较强的致病性。然而，它们对于受损的主机来说足够危险。因此，有必要预防和控制机器的细菌污染。少

项目成果

期刊论文数量（20）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

歯科処置ユニットの水の管理

牙科治疗室用水管理

DOI：
发表时间：
2005
期刊：
臨床医 31・8(印刷中)
影响因子：
0
作者：
林俊治
通讯作者：
林俊治

細菌コロニー数の簡便概算法

估计细菌菌落数量的简单方法

DOI：
发表时间：
2004
期刊：
臨床検査 48・5
影响因子：
0
作者：
林俊治;Shunji Hayashi;林俊治
通讯作者：
林俊治

A simple method to count bacterial colonies on agar plates (in Japanese)

琼脂平板上细菌菌落计数的简单方法（日语）

DOI：
发表时间：
2004
期刊：
Rinsho Kensa (Journal of Medical Technology) 48
影响因子：
0
作者：
Fujita;M;Akabayashi A;Slingsby;BT;Kosugi;S;Fujimoto;Y;Tanaka,K.;Shunji Hayashi
通讯作者：
Shunji Hayashi

Control of water contamination of dental units (in Japanese)

牙科综合治疗台水污染的控制（日语）