title: Efficacy and contamination of in-use disinfectants in Rajavithi General Hospital.
abstract: Quality testing of disinfectant in-use in Rajavithi General Hospital was conducted to evaluate the germicidal activity and contamination. Two hundred and thirty-four samples of 4 commonly used disinfectants in operating rooms, labour rooms and the surgical intensive care unit were studied. Results showed that 2 of 126 samples of chlorhexidine/cetrimide 1:100 dilution were contaminated by P.maltophilia and A.xylosoxidans and failed the in-use test. One of 34 samples of phenolics yielded A.lowffii. Two of 16 hypochlorite 0.05% grew E.cloacae, Enterobacter spp., A.calcoaceticus and Pseudomonas spp. Forty-six samples of 1:500 and 1:100 of quaternary ammonium compound, and 12 samples of 1% hypochlorite were not contaminated. Bacterial contamination and failure to kill bacteria by disinfectants reflected improper preparation and use of these solutions. Periodic quality testing is clearly indicated.
authors.affiliation: Department of Pathology, Rajavithi General Hospital, Bangkok, Thailand.
authors.forename: S
authors.initials: S
authors.lastname: Kajanahareutai
authors.forename: S
authors.initials: S
authors.lastname: Rahule
authors.forename: P
authors.initials: P
authors.lastname: Sirikulsatien
authors.forename: S
authors.initials: S
authors.lastname: Sangkasuwan
authors.forename: P
authors.initials: P
authors.lastname: Yospol
mesh_terms: D004202:Disinfectants / Q000592:standards; D004340:Drug Contamination; D004363:Drug Utilization; D005069:Evaluation Studies as Topic; D006769:Hospitals, General; D006801:Humans; D017053:Infection Control / Q000592:standards; D011786:Quality Control; D013785:Thailand
chemical_list: D004202:Disinfectants