the best-known bacteriophage community is that of the gut virome. a virome is a community of viruses within a host ecosystem (for example, the human or other animal intestinal tract).the gut community receives continual influx of new bacteria and phages while shedding present members. some prophages of pathogenic bacteria express virulence factors such as the shiga toxin of shigella or of e. coli o157:h7, whereas other prophages may protect the gut bacteria from superinfection by some of the many types of phages present in the gut. identify the evidence provided for the positive effects of phages. choose one or more: a. phage particles may suppress over-reactive t cells and tumor formation. b. phages may contribute beta-1,3-galactosyltransferase enzymes for healthy colon function. c. phage infection may increase bacterial susceptibility to antibiotics. d. phages may limit bacterial numbers, thus maintaining gut homeostasis. e. phages may attack and erode biofilms such as pseudomonas aeruginosa.