Table 1 Means, minimum, and maximum of particulate matter (PM100 [μg/m3]) and microbial levels (cell equivalents/m3) in infant breathing zone (IBZ) versus adult breathing zone (ABZ) during both five individual crawling and walking experiments on different carpets and corresponding ratios of IBZ versus ABZ
From: Crawling-induced floor dust resuspension affects the microbiota of the infant breathing zone
PM or microbial group | Infant breathing zone (IBZ) | Adult breathing zone (ABZ) | Ratio of IBZ to ABZ | ||||
|---|---|---|---|---|---|---|---|
Mean | Min-max | Mean | Min-max | Mean | Min-max | ||
Infant crawling experiments | PM100 conc. [μg/m3] | 210 | 87–310 | 73 | 18–150 | 4.6 | 1.3–12 |
Cherb [CE/m3] | 13 | 4.9–29 | 1.7 | 0–8.5 | – | – | |
PenAsp [CE/m3] | 250 | 100–560 | 34 | 0–140 | 7.9 | 4.1–13 | |
Total fungi [CE/m3] | 450 | 91–1100 | 92 | 0–370 | 9.4 | 3.0–20 | |
Gram pos [CE/m3] | 14,000 | 1900–23,000 | 700 | 400–970 | 21 | 4.8–47 | |
Gram neg [CE/m3] | 8500 | 760–17,000 | 1300 | 400–3000 | 13 | 1.1–43 | |
Adult walking experiments | PM100 conc. [μg/m3] | 50 | 22–79 | 43 | 17–70 | 1.3 | 0.4–1.9 |
Cherb [CE/m3] | 3.7 | 0–9.3 | 4.5 | 0–15 | – | – | |
PenAsp [CE/m3] | 170 | 0–510 | 120 | 30–334 | 2.1 | 1.5–3.9 | |
Total fungi [CE/m3] | 310 | 37–1100 | 200 | 30–640 | 1.2 | 0.6–1.7 | |
Gram pos [CE/m3] | 5200 | 1400–9400 | 3600 | 830–6800 | 1.4 | 0.7–2.0 | |
Gram neg [CE/m3] | 3400 | 2200–7100 | 2300 | 1100–6100 | 1.8 | 1.2–2.2 | |