Classification is based on the discussion of Abedon [78]. Generally, “therapy” involves treatment of disease in infected or potentially infected individuals; that is, therapy thus is both of infectious, bacteria-caused disease and of an individual disease-carrying host. “Biocontrol” by contrast involves treatment of environments, variously defined. Therapy also can be viewed as phage use as a drug or especially antibiotic equivalent whereas biocontrol, narrowly defined, is phage use as a disinfectant or antiseptic equivalent. “Both” refers to treatments that could be classified as either biocontrol or therapy because individuals are being treated within the context of the treatment of environments such as the use of phages in agriculture against plant pathogens. In either case, treatment versus prevention is not distinguished in the table.
