Microbial contamination of'sterile water'used in Japanese hospitals.
We examined the following samples of water from 10 hospitals for microbial contamination : water obtained using an ultra filtration system (UF water), a reverse osmosis system (R () water), a water distillation system (distilled water) and tap water.
UF water and R () water are used for handwashing before surgery, and distilled water for the preparation of drugs.
All 10 samples of tap water examined were contaminated with<10 colony forming units (cfu)/mL.
Thirteen (68%) of 19 samples of UF water, nine (53%) of 17 samples of R () water and 15 (79%) of 19 samples of distilled water were contaminated with 10-1-104 cfu/mL.
The majority of microorganisms were non-fermentative bacteria such as Sphingomonas paucimobilis and CDC gr.
Japanese hospitals commonly use UF water and R () water for preoperative handwashing under the assumption that it is sterile. () ur results suggest, however, that these types of water are inferior microbiologically to tap water.
Distilled water from the dispensary was also contaminated with micro-organisms.
The available chlorine content of tap water was 0.17-0.42 ppm and that of UF water (from tap water) 0-06 ppm.
There was no available chlorine in RO water or distilled water (each from tap water).
The reduction or disappearance of available chlorine appears to be associated with micriobial contamination of UF water, RO water and distilled water.
Mots-clés Pascal : Lavage, Main, Préopératoire, Contamination biologique, Eau, Ultrafiltration, Osmose inverse, Distillation, Etude comparative, Exploration microbiologique, Hôpital, Japon, Asie, Hygiène
Mots-clés Pascal anglais : Washing, Hand, Preoperative, Biological contamination, Water, Ultrafiltration, Reverse osmosis, Distillation, Comparative study, Microbiological investigation, Hospital, Japan, Asia, Hygiene
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0126598
Code Inist : 002B05A02. Création : 22/06/1998.