在60°C或70°C洗涤纺织品后接着进行滚筒烘干的去污水平。
Level of decontamination after washing textiles at 60°C or 70°C followed by tumble drying.
作者信息
Tano Eva, Melhus Asa
机构信息
Department of Medical Sciences/Section of Clinical Bacteriology, Uppsala University, Uppsala, Sweden;
Department of Medical Sciences/Section of Clinical Bacteriology, Uppsala University, Uppsala, Sweden.
出版信息
Infect Ecol Epidemiol. 2014 Nov 11;4:24314. doi: 10.3402/iee.v4.24314. eCollection 2014.
BACKGROUND
Several major outbreaks in healthcare facilities have occurred with the emergence of multi-resistant bacteria. A possible route for dissemination is the hospital textiles and inadequate laundering of them. The aim of this study was to develop an easy-to-use method for simulating the laundering process of hospital textiles, and thereafter apply the method when evaluating the decontaminating efficacy of two different washing temperatures.
METHODS
The laundering process, including tumble drying, took place at two professional laundries. Enterococcus faecium was used as bioindicator.
RESULTS
The results showed that a lowering of the washing temperature from 70°C to 60°C did not affect the decontamination efficacy; the washing cycle alone reduced the number of bacteria with 3-5 log10 CFU, whereas the following tumble drying reduced the bacterial numbers with another 3-4 log10 CFU, yielding the same final result independent of washing temperature. Without tumble drying, there was an obvious risk of adding non-fermenting gram-negative bacteria to the fabric. These bacteria originated from the washing cycle.
CONCLUSION
A simple method to simulate hospital laundering was developed. To save energy, it is possible to use a washing temperature of 60°C, but the washing cycle should be followed by tumble drying, and the whole laundering process needs to be monitored to maintain sufficient textile hygiene.
背景
随着多重耐药菌的出现，医疗机构发生了几起重大疫情。医院纺织品及其洗涤不充分可能是传播途径之一。本研究的目的是开发一种易于使用的方法来模拟医院纺织品的洗涤过程，然后在评估两种不同洗涤温度的去污效果时应用该方法。
方法
洗涤过程，包括滚筒烘干，在两家专业洗衣店进行。粪肠球菌用作生物指示剂。
结果
结果表明，洗涤温度从70°C降至60°C并不影响去污效果；仅洗涤周期就能使细菌数量减少3-5个对数10 CFU，而随后的滚筒烘干又能使细菌数量减少3-4个对数10 CFU，无论洗涤温度如何，最终结果相同。不进行滚筒烘干时，织物明显有添加非发酵革兰氏阴性菌的风险。这些细菌源自洗涤周期。
结论
开发了一种模拟医院洗涤的简单方法。为了节约能源，可以使用60°C的洗涤温度，但洗涤周期后应进行滚筒烘干，并且需要对整个洗涤过程进行监测，以保持足够的纺织品卫生。
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