Contamination of a dental unit water line system by legionella pneumophila in the mashhad school of dentistry in 2009

الملخص EN

Background : Dental unit waterline system is considered potential source for contamination with Legionella species.

The aim of this study was to determine if contamination of a dental unit water line system by Legionella pneumophila serogroup1 in the Mashhad School of Dentistry occurred in 2009.

Methods : A total of 52 dental units were selected from all clinical departments of the Mashhad School of Dentistry.

Samples of water were collected from outlets of water / air spray, high-speed dental hand pieces and water cup fillers.

Samples were tested via the ELISA method.

Results : At the beginning of the work day, a total of 36.1 percent of dental units were contaminated by Legionella pneumophila serogroup 1.

Conclusion : Infection control of the dental unit water line system regarding legionella in the Mashhad School of Dentistry is a challenge and engineering controls should be used in contaminated clinics.