A cocktail of in vitro efficient phages is not a guarantee for in vivo therapeutic results against avian colibacillosis.
Tsonos J, Oosterik LH, Tuntufye HN, Klumpp J, Butaye P, De Greve H, Hernalsteens JP, Lavigne R, Goddeeris BM. Vet Microbiol. 2014 Jul 16; 171(3-4):470-9. Epub 2013 Nov 4.