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KMID : 0377619910560060449
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Korean Jungang Medical Journal
1991 Volume.56 No. 6 p.449 ~ p.457
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Contamination Sources Influencing Nosocomial Infection
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Abstract
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This study aims at investigating the contamination in that air of wards, patient things (patient clothing, sheet, bed), and nurse towels and uniforms, which are the sources of contamination, and at examining the correlation of bacterial contamination between the air of window side and that of door side, air and patient things, and among patient things. Quantitative sampling of microbes was conducted from May 2 to May 6, 1991 by using thioglycollate broths and blood agar plates at nine surgical wards of a hospital in C city. The data were processed by a statistical method.
The results of this study are as follows:
1. Of the whole bacteria studied, staphylococcus was 23.5 %, Gram negative bacillus 17.6 %, and fungus isolated from the air 4.8 %.
1) Of the bacteria isolated from the air, staphylococcus was 32.1 %, Gram negative bacillus 13.1 %, and Gram positive bacillus 6.0 %.
2) Of the bacteria isolated from patient things, other Gram positive coccus and Gram positive bacillus were 24.4 % respectively, and staphylococcus was 14.7 %, the least. The largest number of bacteria from patient clothing was Gram positive coccus (29.6 %), from sheets were Gram positive bacillus (25.9 %) and Gram negative coccus (25.9 %), and that from beds was Gram positive coccus (32.1 %).
3) Of the bacteria isolated form nurse uniforms, Gram positive bacillus was the largest (41.7 %) and Gram negative bacillus was 16.7 %.
4) Only Gram negative bacillus (66.7 %) and staphylococcus (33.3 %) were isolated from nurse towels.
2. The average of airborne microbes was 19 colonies at the window side and 28 colonies at the door side. The species of bacteria isolated were distributed similar at the window side and the door side.
3. The species of bacteria from the air and patient things were significantly different (x2= 20.24, P < 0.01), revealing they were not correlated.
4. The species of bacteria from patient clothing, sheets, and beds were not significantly different, revealing they were correlated.
5. Of the staphylococci, coagulase positive staphylococcus was 25.0 %, and coagulase negative staphylococcus was 75.0%.
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