The concentration and variation of airborne bacteria in Zhengzhou city
Xi Yue
Dang Dejian
Liu Huiying
Xu Yake
Long Jinzhao
Huang Lu
Zhu Jiehui
Abstract：Objective To investigate the concentration, variation of airborne bacteria and the relationship between the concentration of airborne and PM10 in Zhengzhou city and provide guidance for the activity of outdoor people.Methods We collected the airborne bacteria in five places in Zhengzhou city with a 6-mesh impact type air microorganism sampler, and then the Petri-dishes were cultured at 37 degrees Celsius for 48 hours.Results The concentration of airborne bacteria in Zhengzhou city from March to August ranged from 148 to 2 045 cfu (colony-forming unit) per cubic meters, and the average concentration was 686 cfu per cubic meters.The monthly average concentration of outdoor airborne bacteria at the Henan Medical University, the cigarette factory, water supply company, banking school and the 47th middle school were 974, 832, 647, 520 and 457 cfu per cubic meters respectively;furthermore, the concentration of airborne bacteria from March to August had a monthly change.The correlation coefficient of concentration of airborne and PM10 was 0.40 (P=0.028<0.05), which indicated a moderate correlation.Conclusion The concentration of airborne bacteria in Zhengzhou city has a regional difference, a variation trend of month, and a significant positive correlation with the concentration of PM10.The susceptible population should pay attention.Furthermore, the public should anticipate the risk of airborne infection in large scale.
Keywords：Zhengzhou cityairborne bacteriavariation trend
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 593-596 )