歯科用エアロゾル：微生物組成と空間分布

Dental aerosols: microbial composition and spatial distribution.

• C Zemouri
• C M C Volgenant
• M J Buijs
• W Crielaard
• N A M Rosema
• B W Brandt
• A M G A Laheij
• J J De Soet

抄録

:歯科用高速器具はエアロゾルを発生させ、病原性微生物の感染に寄与する可能性がある。本研究の目的は、歯科医院におけるエアロゾルの微生物負荷と組成および空間分布を記述することである。採取したコロニー形成単位(CFU)は分類子同定のためにシークエンスされた．治療後、患者の頭部から1.5m離れた位置での汚染度は、開始時と同様であった。最も高い汚染度は患者の胸部で認められた。エアロゾルによる歯科医院内の汚染は主に少ないが、患者の頭部周囲80cm以内では、ヒト由来と水由来の両方の菌が高レベルで検出された。今回の結果は、患者の頭部に近い表面や歯科用水路での感染対策の重要性を強調するものであった。

: High-speed dental instruments produce aerosols, which can contribute to the transmission of pathogenic microorganisms. The aim of this study is to describe the microbial load and - composition and spatial distribution of aerosols in dental clinics. : In four dental clinics active and passive sampling methods were used before, during and after treatment and at different locations. Retrieved colony forming units (CFU) were sequenced for taxon identification. : The samples contained up to 655 CFU/plate/30 minutes and 418 CFU/m/30 minutes during dental treatment for active and passive sampling, respectively. The level of contamination after treatment and at 1.5 m distance from the patient's head was similar to the start of the day. The highest contamination was found at the patient's chest area. The aerosols consisted of 52 different taxa from human origin and 36 from water. : Contamination in dental clinics due to aerosols is mainly low, although high level of contamination with taxa from both human and water origin was found within 80 cm around the head of the patient. Our results stress the importance of infection control measures on surfaces in close proximity to the head of the patient as well as in dental water lines.

© 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.