Figure 3 e Observation of pH changes in culture media using pH meter. pH tolerance of four Lactobacillus acidophilus
strainsd(A) L. acidophilus KCTC 3140 isolated from rat gut, (B) L. acidophilus KCTC 3146 isolated from pig gut, (C) L. acidophilus
KCTC 3154 isolated from chicken gut, and (D) L. acidophilus KCTC 3179 isolated from human gutdwas determined in culture
media during growth in MRS broth in the absence of BSAE (A), and in the presence of 1.0% BSAE (-) and 3.0% BSAE (:) (w/
v). Results are presented from three independent analyses. Values not sharing the same letter are significantly different
(p < 0.05). BSAE ¼ Bulnesia sarmienti aqueous extract; MRS ¼ de Man, Rogosa, and Sharpe.