Fig. 2

Composition of bacteria and phage in the North End Sewage Treatment Plant. A Relative abundance of bacteria at the class level. B Relative abundance of phage at the family level. C Relative abundance of bacteria at the genus level. Effluent (EFF), returned activated sludge (RAS), raw sewage/influent (RS), negative control (NEG), October (T1), November (T2), December (T3), February (T4)