Al-Ghamdi A K, Abdelmalek S M A, Bamaga M S, Azhar E I, Wakid M H, Alsaied Z
Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.
Southeast Asian J Trop Med Public Health. 2011 May;42(3):711-6.
Fomites are inanimate objects that are capable of absorbing, harboring and transmitting infectious microorganisms. Paper currency, an exchangeable fomite, is constantly subjected to contamination. This study investigated bacterial contamination on the Saudi one Riyal paper note. Two hundred one Riyal bills (100 4th version and 100 5th version) were collected in the city of Jeddah for examination. The notes were examined for bacterial contamination using blood agar and MacConkey agar. Eighty-eight percent of the notes were contaminated with mixed (>or=2 types) bacterial growth. All 4th version notes had mixed bacterial growth: gram-positive bacilli (79%), coagulase-negative staphylococci (75%), Staphylococcus aureus (38%), Klebsiella spp (21%), Pseudomonas spp (19%), Escherichia coli (9%), viridans group streptococci (VGS) (8%), and non-hemolytic streptococci (4%). Seventy-six percent of the newer 5th version notes had mixed bacterial growth: gram-positive bacilli (68%), coagulase-negative staphylococci (64%), S. aureus (13%), Klebsiella spp (9%), Pseudomonas spp (5%), E. coli (2%) and VGS (2%). These results indicate the Saudi one Riyal paper note is commonly contaminated with bacteria, and may act as a vehicle for the transmission of potentially pathogenic bacteria. The more the bill had been handled the greater the contamination was.
污染物是能够吸收、容纳并传播传染性微生物的无生命物体。纸币作为一种可交换的污染物，经常受到污染。本研究调查了沙特一里亚尔纸币上的细菌污染情况。在吉达市收集了200张一里亚尔纸币（100张第四版和100张第五版）用于检测。使用血琼脂和麦康凯琼脂对纸币进行细菌污染检测。88%的纸币被混合（≥2种类型）细菌生长污染。所有第四版纸币都有混合细菌生长：革兰氏阳性杆菌（79%）、凝固酶阴性葡萄球菌（75%）、金黄色葡萄球菌（38%）、克雷伯菌属（21%）、假单胞菌属（19%）、大肠杆菌（9%）、草绿色链球菌（VGS）（8%）和非溶血性链球菌（4%）。较新的第五版纸币中有76%有混合细菌生长：革兰氏阳性杆菌（68%）、凝固酶阴性葡萄球菌（64%）、金黄色葡萄球菌（13%）、克雷伯菌属（9%）、假单胞菌属（5%）、大肠杆菌（2%）和VGS（2%）。这些结果表明沙特一里亚尔纸币普遍被细菌污染，可能作为潜在病原菌传播的载体。纸币经手次数越多，污染程度越高。
