Figure 1: Aerobic heterotrophic bacteria of 71 samples from the output water of dental chair units. The boxplot diagram shows the median, interquatrile range and outlier.
Abbreviations: R2A3572 = R2A agar at 35°C for 72 h; R2A35120 = R2A agar at 35°C for 120 h; R2A22120 = R2A agar at 22°C for 120 h; R2A22168 = R2A agar at 22°C for 168 h