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| Airborne bacterial community composition in family homes in Beijing |
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Abstract The community composition and concentration variation pattern of airborne bacteria were conducted from Nov. 2009 to Oct. 2010 in 31 households with children in Beijing. Results showed that 43 genera (32 genera of Gram-positive and 11genera of Gram-negative bacteria) airborne bacteria was identified from 632 isolates. The most common bacterias were members of genera Micrococcus, Bacillus, Staphylococcus, Kocuria, and contributed to 5%~31%, 12%~17%, 10%~15%, 9%~18% of the total bacterias, respectively. In the selected 31 households, the bacterial concentration in the air ranged from 47~12341cfu/m3, and the mean concentration was 1821cfu/m3. As for the seasonal variation pattern of airborne bacteria, higher bacterial concentration was observed in spring (2967cfu/m3), followed by summer (1742cfu/m3) and autumn (1334cfu/m3), and the lowest in winter (1242cfu/m3). Finally, we also discovered bacterial concentration in households with boys (2123cfu/m3) was higher than households with girls (1511cfu/m3).
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Received: 09 December 2013
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