Table 2.

Relative abundances of Bacteroides increase and of Bifidobacterium, Faecalibacterium and Roseburium decrease in SARS-CoV-2 positive subjects versus SARS-CoV-2 negative exposed controls

Genus (±species)	Relative abundance (mean±SEM)		P value
	Exposed controls	SARS-CoV-2 positive
Alistipes	0.0639±0.0095	0.0721±0.0100	0.8709
Bacteroides	0.1235±0.0178	0.2183±0.0191	0.0025
Bifidobacterium	0.0755±0.0219	0.0147±0.0051	<0.0001
Blautia	0.0261±0.0040	0.0524±0.0088	0.1349
Clostridium	0.0431±0.0075	0.0309±0.0039	0.9948
Collinsella	0.0146±0.0045	0.0158±0.0029	0.9948
Dorea	0.0137±0.0024	0.0185±0.0022	0.2777
Eubacterium	0.0441±0.0063	0.0402±0.0043	0.4786
Faecalibacterium	0.0550±0.0086	0.0310±0.0039	0.0137
F. prausnitzii	0.0542±0.0085	0.0313±0.0039	0.0153
Prevotella	0.0110±0.0086	0.0091±0.0066	0.6538
Roseburium	0.0329±0.0056	0.0195±0.0032	0.0097
Ruminococcus	0.0376±0.0079	0.0391±0.0056	0.9844

Mean±SEM relative abundances, as well as p value via Mann-Whitney U test are indicated, with bold marking p<0.05.