Table 1.

Summary of most important phage therapy trials.

Year	Target	Results	Factors Responsible for Failure	Reference
2016	E. coli/Proteus (children diarrhea)	Lack of clinical efficacy of oral phages	Insufficient phage coverage; too low E. coli titers; overgrowth of Streptococcus	[3]
2017	P. aeruginosa/E.coli (burn infections)	Trial was stopped because of insufficient efficacy	Decreased titer of phage preparations	[4]
2020	Staphylococcus Streptococcus E. coli P. aeruginosa Proteus (urinary tract infections)	Success rates similar to placebo (bladder irrigation)	Reduction of the bacterial load caused by bladder irrigation with placebo comparable with the effect of phage preparations	[1]