Stanczyk D A, Paunovich E D, Broome J C, Fatone M A
646th Medical Group/SGD, University of Texas Health Sciences Center, San Antonio.
Oral Surg Oral Med Oral Pathol. 1993 Jul;76(1):112-9. doi: 10.1016/0030-4220(93)90305-n.
This study investigated microbiologic contamination of an automatic dental radiograph processor and daylight loader during a week of simulated clinical use. Pure cultures of Candida albicans, Streptococcus pneumoniae, Staphylococcus aureus, or Klebsiella pneumoniae were used to contaminate 320 vinyl intraoral radiograph packets. Each end of the films was deliberately contaminated during opening. These films and 24 uncontaminated control films were processed. Daylight loader ports, inlet and outlet rollers, fixer and developer samples, and 12 processed films were cultured daily. To simulate a weekend, the processor sites were cultured during 72 hours of inactivity after the contaminated runs. The results showed that contamination of the processor and daylight loader occurred and remained even after 48 hours of inactivity. Films remained contaminated after processing. In addition, cross-contamination of films occurred in the processor.
本研究调查了自动牙科X线片冲洗机和日光装卸机在一周模拟临床使用期间的微生物污染情况。使用白色念珠菌、肺炎链球菌、金黄色葡萄球菌或肺炎克雷伯菌的纯培养物污染320个乙烯基口腔内X线片包。在打开时，故意污染胶片的两端。对这些胶片和24张未受污染的对照胶片进行冲洗。每天对日光装卸机端口、进出口滚轴、定影液和显影液样本以及12张冲洗后的胶片进行培养。为模拟周末，在受污染冲洗运行后的72小时不活动期间对冲洗机部位进行培养。结果表明，冲洗机和日光装卸机发生了污染，即使在48小时不活动后污染仍然存在。冲洗后胶片仍受污染。此外，冲洗机中还发生了胶片之间的交叉污染。
