Has Saltikva been shown to colonize tumors in patients?

No. Salspera, Inc. proposes that Saltikva colonizes tumors, based on animal studies, but in the Saltikva Phase 2 direct confirmation of intratumoral bacterial colonization and localized IL-2 release was not performed, mandatory tumor biopsies were not included, and immune profiling was done in only the first treated patient. The planned Phase 3 is described as including mandatory biopsies.