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Condensate of split systems as a potential threat to the health of population: experimental substantiation


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The purpose of this work - the study of microorganisms from condensate, formed in air-conditioning systems, and assessment of the possibility of aerosol drifting to the "breathing zone" of the human. Materials and methods Sampling of condensate from air-conditioning systems; isolation of pure strains and their identification; modeling of tentative situation, when from the air-conditioning split system, located at the level of the second floor, draining condensate contains conditionally pathogenic bacteria. Results In condensate there was revealed conditionally pathogenic microflora of families Enterobacteriaceae and Pseudomonadaceae, Staphylococcus aureus and Burkholderia cepacia. When drops are falling from the height of 2 meters on the solid surface aerosol is formed. Given aerosol containing microorganisms from condensate and can be lifted by airflow at a height of 1.5 meters, to the breathing zone of an adult human. Conclusions For the reduction of the risk of the contamination of condensate with conditionally pathogenic microflora it should be recommended the regular cleaning and disinfection of air-conditioning systems. To protect the health of casual passer from bacteria-contained aerosol, it is worth to remove the condensate from internal unit of the air-conditioning system directly into the sewer system.

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