Sterilizing effect and residual bacteria of four different methods for sterilizing simple breathing vesicles.
- Author:
Aiwu LU
1
;
Mei WANG
;
Zhiqiang NIE
;
Yuanbo GUO
;
Chunxiao WANG
Author Information
- Publication Type:Journal Article
- MeSH: Bacteria; isolation & purification; Colony Count, Microbial; Disinfection; methods; Drug Resistance, Bacterial; Ventilators, Mechanical
- From: Journal of Southern Medical University 2013;33(7):1067-1070
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the effects of 4 different methods for disinfection of simple breathing vesicles and microbial residue.
METHODSThe disinfection tests were divided into 4 groups: G1 group (43 cases) with 500 mg/L chlorine dioxide spray, G2 group (28 cases) with alcohol spray, G3 group (47 cases) with 50 mg/L trichloroisocyanuric acid (TCCA) immersion, and G4 group (46 cases) with 50 mg/L chlorine dioxide solution immersion. After 30 min of disinfection, each group was examined by bacterial culture and colony count. The residual bacteria were identified and typed.
RESULTSThe 4 methods showed significant differences in bacterial colony count (P<0.001). The rate of bacterial residue was 0% in G1 group, 53.6% in G2 group, 27.7% in G3 group, and 21.7% in G4 group, showing significant differences between the 4 groups (P<0.001). The residual bacteria included antibiotic-resistant common opportunistic pathogen such as Pseudomonas aeruginosa, Acinetobacter baumannii and Staphylococcus haemolytic.
CONCLUSIONSDisinfection with 500 mg/L chlorine dioxide spray is the best for simple breathing vesicles. Prolonged immersion in TCCA may lead to the growth of drug-resistant pathogens in the breathing vesicles.
