Indoor microbiota in severely moisture damaged homes and the impact of interventions

Microbiome

Table 2 Impact of home environmental and microbial measurement parameters on the composition of the bacterial and fungal microbiota in severely moisture-damaged homes. ANOSIM analysis used weighted Unifrac distance for bacteria and fungal Bray-Curtis distance (FDLR, floor dust living room; SD, settled dust)

	Bacterial weighted Unifrac						Fungal Bray-Curtis
	FDLR			SD			FDLR			SD
Variable tested	N	R	p value	N	R	p value	N	R	p value	N	R	p value
Environmental determinants
Pets	38	0.020	0.221	35	−0.003	0.466	38	−0.050	0.985	34	0.043	0.115
Season of sampling	39	0.014	0.348	34	−0.012	0.587	39	0.205	0.001	33	0.049	0.142
Urban vs. rural	40	−0.119	0.971	36	0.105	0.108	40	0.128	0.067	35	0.162	0.018
Biomass—qPCRs
Total fungi	39	0.052	0.205	34	0.017	0.330	39	−0.012	0.529	33	−0.014	0.550
Gram-negative bacteria	39	−0.008	0.567	34	−0.009	0.518	39	−0.046	0.828	33	0.038	0.266
Gram-positive bacteria	39	−0.047	0.807	34	0.050	0.189	39	−0.047	0.792	33	−0.020	0.560
FERMI qPCR index	39	0.117	0.035	34	<0.001	0.444	39	0.098	0.054	33	0.026	0.315
Microbial secondary metabolites
Number of microbial “toxins”	39	0.054	0.163	28	−0.056	0.776	39	0.034	0.273	28	−0.050	0.733
Viable microbes in BM
Bacterial growth in BM	36	−0.053	0.702	31	0.352	0.004	36	0.000	0.467	30	0.007	0.483
Fungal growth in BM	36	−0.023	0.665	31	−0.042	0.827	36	0.090	0.035	30	0.150	0.010

ISSN: 2049-2618