TABLE 1.

Amplicon sequence variants transferred from RYGB or SHAM donors to their corresponding recipients^a

Time point	Number of ASVs
	From RYGB donor only	Remained from the RYGBr’s indigenous at baseline (D-1) only	From both RYGB donor and indigenous communities of the recipients	From SHAM donor only	Remained from the SHAMr’s indigenous communities at baseline (D-1) only	From both SHAM donor and indigenous communities of the recipients
D1	26	8	4	10	10	4
D3	41	13	4	18	16	4
D6	77	29	7	23	19	3
D9	86	24	8	32	22	5
D16	132	26	8	41	21	6

^aColonization of a taxon from the donor in ≥50% recipient rats was counted as a transferred taxon.