Surface Microbial Contamination and Air Quality before and after Regular Cleaning Procedures

Studies on indoor air quality (IAQ) have linked exposure to microorganisms in a variety of illnesses. The association between quality, surface contamination, and IAQ under heterogeneous cleaning procedures are all crucial factors that were investigated this study. ATP bioluminescence test demonstrated significant correlation (r = 0.89; p 0.05) with bacterial count obtained from swab specimens moderate 0.57; 0.001) viable settling count. For the entire sample (pre- post-cleaning), values heterogeneous, averaging 230 RLU/100 cm2, 140 120 135 99 80 offices, classrooms, toilet doorknobs, reception desks, main lobbies, exit respectively. An insignificant outdoor PM2.5 0.21; 0.05), an I/O ratio average value 1.2, CO2 exceeding 1 suggest minor impact air. After cleaning, fungal counts surfaces showed reduction, suggesting effective. concentrations VOC but not HCHO significantly affected by temperature or relative humidity (RH). We propose as surrogate for detecting contamination rather than which requires additional validation. results active microbial sampling (in CFU/m3) plates CFU/m2/h) be interpreted independently avoid confusion.