Methods of expanding bacteriophage host-range and bacteriophage produced by the methods
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United States of America Patent
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Jun 5, 2018
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N/A
app pub date -
Oct 14, 2015
filing date -
Oct 14, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A method of producing novel bacteriophages with expanded host-range and bacteriophages with expanded host ranges are disclosed. The method produces mutant phage strains which are infectious to a second host and can be more infectious to their natural host than in their natural state. The method includes repeatedly passaging a selected phage strain into bacterial cultures that contain varied ratios of its natural host bacterial strain with a bacterial strain that the phage of interest is unable to infect; the target-host. After each passage the resulting phage are purified and screened for activity against the target-host via double-overlay assays. When mutant phages that are shown to infect the target-host are discovered, they are further propagated in culture that contains only the target-host to produce a stock of the resulting mutant phage.
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