Decontamination of dental unit water systems with hydrogen peroxide.

Abstract:

AIMS:Transmission of microbial pathogens to patients from water in dental units is a concern. To reduce this risk, the decontaminating efficiency of hydrogen peroxide was evaluated. METHODS AND RESULTS:Three percent hydrogen peroxide diluted 1 : 4 in distilled water (contact time 15 min) was used daily to disinfect the waterlines of a pilot unit previously contaminated with Pseudomonas aeruginosa or Staphylococcus aureus. The behaviour of the test bacteria was seen to differ over time. Staph. aureus numbers slowly decreased until only low numbers were recovered, after which the levels remained stable. Ps. aeruginosa abatement was more rapid and the density of the bacteria reached a peak when the circuit was empty. CONCLUSIONS:Staph. aureus and Ps. aeruginosa treated with hydrogen peroxide fell from 6 to 4 log. SIGNIFICANCE AND IMPACT OF THE STUDY:Treatment of dental unit waterlines with hydrogen peroxide was seen to be able to keep the number of the bacteria under control, as long as the treatment was repeated daily.

journal_name

Lett Appl Microbiol

authors

Zanetti F,De Luca G,Tarlazzi P,Stampi S

doi

10.1046/j.1472-765x.2003.01378.x

subject

Has Abstract

pub_date

2003-01-01 00:00:00

pages

201-6

issue

3

eissn

0266-8254

issn

1472-765X

pii

1378

journal_volume

37

pub_type

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