Montagna M T, Tatò D, Napoli C, Castiglia P, Guidetti L, Liguori G, Petti S, Tanzi M L
Dip. di Scienze Biomediche ed Oncologia Umana, Sezione di Igiene, Università degli Studi di Bari.
Ann Ig. 2006 Jul-Aug;18(4):297-303.
Among the microorganism involved in environmental contamination, Legionella spp is actually considered an important infectious hazard. The aim of this study is to evaluate the incidence of Legionella spp in water samples collected from 138 dental unit selected from public outpatient clinics of 6 Italian cities. The samples were taken from oral rinsing cup, air-water syringe, ultrasonic scaler and the turbine to investigate Legionella spp, Pseudomonas aeruginosa and the total heterotrophic count at 36 degrees and 22 degrees. Legionella spp was present in 33,3% dental unit water; but a significant difference was shown among the enrolled cities. In 43,5% of water sample Legionella concentration was 1.000-10.000 CFU/L and in 30,4% was >10.000 CFU/L. L. pneumophila 1 was found in 23,9% of water samples. The results demonstrate that the concentration of Legionella spp in dental unit water lines could be high and this suggests that the exposure to these micoorganism during the dental practise could be a potential health risk both for dental personnel and for the patients too, especially when immunocompromised.
在造成环境污染的微生物中，军团菌属实际上被视为一种重要的感染危害因素。本研究的目的是评估从意大利6个城市的公立门诊所选取的138个牙科设备的水样中军团菌属的发生率。样本取自口腔冲洗杯、水气注射器、超声波洁牙器和涡轮机，以检测36摄氏度和22摄氏度时的军团菌属、铜绿假单胞菌以及总异养菌数。33.3%的牙科设备用水中存在军团菌属；但在所纳入的城市之间存在显著差异。在43.5%的水样中军团菌浓度为1000 - 10000 CFU/L，在30.4%的水样中>10000 CFU/L。在23.9%的水样中发现了嗜肺军团菌1型。结果表明，牙科设备水管中军团菌属的浓度可能很高，这表明在牙科诊疗过程中接触这些微生物可能对牙科工作人员和患者都构成潜在健康风险，尤其是对免疫功能低下者而言。
