Fig. 7

Therapeutic effect of phage A221 or FFC treatments on E. coli infection in piglets. Cecum sections of Fig. 7 (A-D 20 × , I-L 20 × , E–H 40 × and M-P 40 ×) were from piglets sacrificed after 7d treatment (HE stain). Infected piglets were infected with the host bacterial E. coli GXXW-1103 and received saline treatment (B + F + J + N), and non-infected piglets received only saline treatment (A + E + L + M). The histopathological changes of piglets on the phage A221 treatment (C + G + K + O) and the FFC treatment (D + H + L + P). Scale bar 150 μm in A-D, I-L and Scale bar 75 μm in E–H, M-P