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Immunohistochemical staining for T cell infiltration in mouse tumor. Subcutaneous C1498-WT1 tumors were resected and sections were stained with anti-CD4 and anti-CD8a antibodies after oral vaccination. Representative pictures of anti-CD4 staining are shown in a B. longum 420, b B. longum 2012, c PBS, respectively (400×). Representative pictures of anti-CD8a staining are shown in d B. longum 420, e B. longum 2012, and f PBS, respectively (400×)
