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Phage therapy is one of the alternatives to treat infections caused by both antibiotic-sensitive and antibiotic-resistant bacteria, with no or low toxicity to patients. It was started a century ago, although rapidly growing bacterial antimicrobial resistance, resulting in high levels of morbidity, mortality, and financial cost, has initiated the revival of phage therapy. It involves the use of live lytic, bioengineered, phage-encoded biological products, in combination with chemical antibiotics to treat bacterial infections. Importantly, phages will be removed from the body within seven days of clearing an infection. They target specific bacterial strains and cause minimal disruption to the microbial balance in humans. Phages for medication must be screened for the absence of resistant genes, virulent genes, cytotoxicity, and their interaction with the host tissue and organs. Since they are immunogenic, applying a high phage titer for …