Figure 7

Tumor blood flow. (A) Blood flow image of tumor; (B) Classification of blood flow signals. a: saline control group; b: recombinant Bifidobacterium infantis containing pTRKH2-PsT plasmid group; c: recombinant Bifidobacterium infantis containing pTRKH2-PsT/sKDR plasmid group. Grade: 0, no blood flow signals were detected within the tumor; I, minimal blood flow (one or two dot-like or thin- and short-like blood flow signals detected within the tumor); II, moderate blood flow (up to three dot-like blood flow signals or one longer blood flow signals detected within the tumor); III, abundant blood flow (more than five dot-like blood flow signals or two longer blood flow signals detected within the tumor).