美发现医院键盘隐藏细菌

 
根据一项最新研究报道，在美国一家大型教学医院中有超过50％的计算机键盘隐藏潜在的致病细菌。

使用标准检测方法对来自不同医院区域的25个计算机键盘进行了致病微生物污染的检测。在所有键盘中都发现了最常见的致病菌凝固酶阴性葡萄球菌。80％的键盘带有类白喉菌，72%带有微球菌属，64%带有芽胞杆菌属，36%带有非发酵的革兰氏阴性杆菌，12%带有万古霉素敏感肠球菌，4%带有金黄色葡萄球菌，4%带有甲苯异恶唑青霉素易感链球菌。

除此之外，研究人员还检测了不同消毒剂的效能、以及对键盘的装饰和功能。6种不同的消毒剂被检测了对隐藏在键盘中的甲苯异恶唑青霉素抵抗的链球菌、假假单胞菌、万古霉素敏感肠球菌的作用。所有被检测的消毒剂在清除和灭活微生物方面都十分有效。即使在300个消毒循环之后，没有证据显示消毒剂对键盘的使用寿命和功能产生影响。该研究结果发表在2006年5月《感染控制和医院流行病学》。

Hospital Keyboards May Harbor Bacteria
 
A new study reports that potentially pathogenic bacteria were found on more than 50% of computer keyboards tested at a major U.S. teaching hospital.

Twenty-five computer keyboards from various hospital areas were tested for microbial contamination using standard measures. The most common potential pathogen, coagulase-negative staphylococci, were found on all of the keyboards. Diphtheroids were found on 80% of keyboards, Micrococcus species on 72%, Bacillus species on 64%, nonfermentative Gram-negative rods on 36%, vancomycin-sensitive Enterococcus on 12%, Staphylococcus aureus (ORSA) on 4%, and oxacillin-susceptible S aureus on 4%.

In addition, the researchers determined the efficacy of various disinfectants and their cosmetic and functional effects on the keyboards. Six different disinfectants were tested against oxacillin-resistant ORSA, Pseudomonas aeruginosa, and vancomycin-resistant Enterococcus species that were inoculated onto study keyboards. All of the disinfectants tested were highly effective in removing or inactivating the test microbes. Even after 300 disinfection cycles, there was no evidence that the disinfectants were having a significant impact on keyboard finish or function. The study was published in the April 2006 issue of Infection Control and Hospital Epidemiology.