Dual predation by bacteriophage and Bdellovibrio bacteriovorus can eradicate escherichia coli prey in situations where single predation cannot by Hobley, L, Summers, JK, Till, R, Milner, DS, Atterbury, RJ, Stroud, A, Capeness, MJ, Gray, S, Leidenroth, A, Lambert, C, Connerton, I, Twycross, J, Baker, M, Tyson, J, Kreft, JU, Sockett, RE