Table 4.

The most abundant taxa at the genus level identified from the three different sample types using Illumina short-read sequences and Nanopore long-read sequences and three different databases.

Sample type	Illumina (short-read sequencing)				Nanopore (long-read sequencing)
	GG	%	SILVA	%	GG	%	SILVA	%	NCBI	%
Floor dust	NAa	18,45	NA	12,64	NA	17,71	NA	12,83	NA	16,43
	Streptococcus	1,35	Streptococcus	1,35	Streptococcus	1,47	Massilia	1,68	Streptococcus	1,98
	Pseudomonas	0,96	Pseudomonas	0,96	Janthinobacterium	1,15	Streptococcus	1,49	Massilia	1,14
	Sphingomonas	0,87	Sphingomonas	0,91	Sphingomonas	0,85	Sphingomonas	0,92	Sphingomonas	1,07
	Staphylococcus	0,61	Massilia	0,84	Haemophilus	0,82	Haemophilus	0,84	Moraxella	0,82
	Lactococcus	0,56	Staphylococcus	0,64	Carica	0,74	uncultured	0,62	Microbacterium	0,78
	Pedobacter	0,50	Lactococcus	0,56	Staphylococcus	0,54	Staphylococcus	0,58	Staphylococcus	0,72
	Micrococcus	0,43	Pedobacter	0,50	Microbacterium	0,49	Microbacterium	0,55	Haemophilus	0,61
	Chryseobacterium	0,43	Micrococcus	0,44	Raphanus	0,45	Pantoea	0,41	Lactococcus	0,45
	Haemophilus	0,43	Chryseobacterium	0,43	Moraxella	0,38	Eutrema salsugineum	0,40	Acinetobacter	0,44
HVAC exhaust filter	NA	10,79	NA	5,40	NA	14,30	NA	8,01	NA	13,15
	Micrococcus	2,25	Micrococcus	2,36	Streptococcus	2,24	Streptococcus	2,25	Streptococcus	2,75
	Streptococcus	1,93	Streptococcus	1,93	Micrococcus	1,54	Micrococcus	1,80	Micrococcus	1,52
	Staphylococcus	1,32	Staphylococcus	1,39	Paracoccus	1,17	Paracoccus	1,20	Paracoccus	1,28
	Corynebacterium	1,20	Corynebacterium	1,10	Staphylococcus	0,97	Staphylococcus	1,00	Staphylococcus	1,21
	Acinetobacter	0,93	Acinetobacter	0,93	Sphingomonas	0,73	Massilia	0,82	Sphingomonas	0,83
	Prevotella	0,85	Sphingomonas	0,85	Acinetobacter	0,63	Sphingomonas	0,78	Moraxella	0,72
	Bacteroides	0,85	Bacteroides	0,85	Enhydrobacter	0,60	Pinus canariensis	0,69	Acinetobacter	0,60
	Enhydrobacter	0,80	Enhydrobacter	0,80	Exiguobacterium	0,45	uncultured	0,64	Massilia	0,57
	Sphingomonas	0,78	Lactobacillus	0,76	Haemophilus	0,36	Acinetobacter	0,64	Exiguobacterium	0,45
HVAC intake filter	NA	27,79	NA	23,94	NA	29,79	NA	25,55	NA	28,43
	Pseudomonas	1,78	Pseudomonas	1,78	Janthinobacterium	0,54	Pinus canariensis	2,32	Janthinobacterium	0,58
	Hymenobacter	0,61	1174 901.12	0,81	Anomodon	0,35	Picea glauca (white spruce)	0,44	Sphingomonas	0,53
	Sphingomonas	0,55	Hymenobacter	0,61	Phytophthora	0,31	Janthinobacterium	0,39	Methylobacterium	0,28
	Janthinobacterium	0,47	Sphingomonas	0,58	Abies	0,27	1174–901–12	0,39	Massilia	0,25
	Methylobacterium	0,22	Janthinobacterium	0,45	Sphingomonas	0,26	Massilia	0,36	Cylindrospermum	0,20
	Pedobacter	0,17	Massilia	0,32	Zea	0,17	Sphingomonas	0,27	Stanieria	0,15
	Erwinia	0,13	Acidiphilium	0,30	Hymenobacter	0,16	uncultured	0,23	Oscillatoria	0,14
	Buchnera	0,12	Methylobacterium	0,28	Buchnera	0,09	Dicranaceae sp. Goffinet 11067	0,22	Gluconacetobacter	0,11
	Flavobacterium	0,12	uncultured	0,24	Methylobacterium	0,09	Hymenobacter	0,16	Granulicella	0,10

^aNot assigned taxonomies.