Journal of Environmental and Public Health / 2020 / Article / Tab 5

Research Article

Environmental Factors and Ventilation Affect Concentrations of Microorganisms in Hospital Wards of Southern Thailand

Table 5

Summary of the average bacterial and fungal concentrations and other key environmental characteristics by hospital time.

MethodBeforeDuringAfterRecommended level

BiosamplerBacteria (CFU/m3)479.59675.14749.05<1,000 FU/m3
Fungi (CFU/m3)214.19309.86413.92<500 FU/m3
Temperature (°C)27.66226.55326.9922–26.1°C
Air velocity (m/s)0.8140.8080.888<0.25 m/s
Humidity (%)72.0072.0072.2730–60% RH

Open plateBacteria (CFU/m3)326.06376.89418.79<1,000 FU/m3
Fungi (CFU/m3)38.7950.6162.50<500 FU/m3
Temperature (°C)28.03926.58027.02222–26.1°C
Air velocity (m/s)0.7010.6220.678<0.25 m/s
Humidity (%)72.0472.1872.2630–60% RH

Remark: NIOSH, 2004; WHO, 2000, ASHRAE 55, 2004; not in compliance with standard.

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