“…Now, BCG after transurethral resection of the bladder tumor has been considered as standard therapy for highârisk nonâmuscleâinvasive bladder tumor (DeGeorge, Holt, & Hodges, 2017). Besides, intratumoral administration of BCG has been tried to treat several types of cancer, such as oral tumor (Zbar, Canti, Rapp, Bier, & Borsos, 1979), lung cancer (Matthay et al, 1986), and melanoma (Krown et al, 1978; Silverstein, DeKernion, & Morton, 1974). At present, it is widely acknowledged that bacteria and its products could reverse tumor tolerance and boost the antitumor immune response by targeting intratumoral pattern recognition receptors (PRRs; Goutagny, Estornes, Hasan, Lebecque, & Caux, 2012; Paulos et al, 2007), and a rising number of bacteria were studied to cancer treatments.…”