Figure 1.

The relative abundance of major phyla in 2-d (A) and 7-d (B) postinoculation samples among different treatment groups in 2-week-long poult study. From the day of hatch, the poults were allocated into N, P, and S groups. Abbreviations: N, Negative control (poults without SH challenge or PF supplementation); P, test group (poults supplemented with PF for 14 d and challenged with SH on day 7); PF, Propionibacterium freudenreichii; S, SH control (poults challenged with SH on day 7 and without PF supplementation); SH, Salmonella Heidelberg.