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Bacterial contamination of the indoor air in a transplant unit


Authors: Matoušková Ivanka;  Holý Ondřej
Authors‘ workplace: Ústav preventivního lékařství, Lékařská fakulta Univerzity Palackého v Olomouci
Published in: Epidemiol. Mikrobiol. Imunol. 62, 2013, č. 4, s. 153-159

Overview

For one year (August 2010 to July 2011), microbial contamination of the indoor air in the Transplant Unit of the Haemato-Oncology Clinic, Olomouc University Hospital was monitored monthly. Twenty sampling sites were singled out and a total of 240 indoor air samples were collected. An MAS-100 air sampler (Merck, GER) was used, air flow rate of 100 liters per minute, 1 minute. The measured values of indoor air temperature were stable. The relative air humidity ranged from 17% to 68%. The highest average value of microbial air contamination was found in the "staff entry room" (1170 CFU/m3). The lowest microbial air contamination (150–250 CFU/m3) was measured in the patient isolation units. The most frequently isolated bacterial strains were coagulase-negative staphylococci (94.3%), followed by Micrococcus spp. (67%) and Bacillus subtilis (11%). It can be assumed that the ­source of these airborne bacterial strains are both patients and medical staff. They are classified as ­opportunistic pathogens and as such can cause hospital infections among haemato-oncology patients.

Keywords:
hospital environment – clean rooms – haemato-oncology patients – coagulase-negative staphylococci – risk of infection


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Hygiene and epidemiology Medical virology Clinical microbiology
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