Skip to main content
. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Sci Total Environ. 2014 Mar 15;0:92–99. doi: 10.1016/j.scitotenv.2014.02.110

Table 3b.

Comparison of the geometric mean concentrations of endotoxin and muramic acid in dust and air samples from low (<5) Environmental Relative Moldiness Index (ERMI) homes (n = 31) and high (>5) ERMI homes (n = 11) considering ERMI values of 2011. Significantly different averages are bolded.

Cell wall material Low ERMI homes High ERMI homes p-value for t-test
Endotoxin concentration (EU/mg dust) 211.72 203.59 0.897
Endotoxin loading (EU/m2 floor) 1.07 × 105 0.84 × 105 0.667
Endotoxin air concentration (EU/m3 air) 4.44 8.64 0.026
Muramic acid concentration (ng/mg dust) 5.48 21.24 0.019
Muramic acid loading (ng/m2 floor) 2.72 × 103 6.25 × 103 0.187
Muramic acid air concentration (ng/m3 air) 0.40 0.57 0.336