The present invention relates to a novel bacteriophage that lyses Acinetobacter genus bacteria, in particular, Acinetobacter genus bacteria having resistance to antibiotics. The bacteriophage of the present invention can be used in various fields, such as antibiotic composition, feed additive composition, feed, disinfectant, cleaning agent, and a composition for prevention or treatment of an infectious disease caused by Acinetobacter genus bacteria.

A method of recovering viable phage from, for example, a crude phage preparation such as a lysate resulting from amplification of phage in bacterial cell culture is disclosed. The method may be “universal”; that is, applicable to the purification of a broad range of phage species and strains. The phage product resulting from the method may have an acceptably low endotoxin titer (e.g. less than 500 EU/ml) and sufficiently high phage titer (e.g. >1×10.sup.9 PFU/ml) for use in therapeutic applications.

The present application provides bacteriophage compositions, and methods of treating or preventing bacterial infections using the bacteriophage compositions. The bacteriophage compositions can inhibit bacterial adhesion, invasion, and/or colonization in epithelial cells. The compositions and methods described herein are useful for treating or preventing mastitis in dairy cows.

Disclosed are compositions, devices, kits, and methods for treatment of Enterobacteriaceae infection. Aspects of the present disclosure are directed to bacteriophage compositions comprising one or more of ES17, ES19, HP3, HP3.1, and HP3.2. Certain aspects of the disclosure are directed to compositions comprising (a) bacteriophage ES17 or bacteriophage ES19, (b) bacteriophage HP3, and (c) bacteriophage HP3.1. Also disclosed are compositions comprising bacteriophage HP 3.2. Further disclosed are devices and kits comprising such compositions and methods for use of such compositions in treatment and prevention of pathogenic E. coli infection.

Disclosed are recombinant phages that infect and kill bacterial hosts in response to user-defined inputs. The components that encode the user-defined inputs can be combined, such that multiple inputs are maintained on a single recombinant phage, enabling precise control over the targeting strategy. The phages can be engineered to kill a specific bacterial species or multiple species simultaneously. Recombinant phages can also be engineered to harbor fluorescent and bioluminescent reporter genes that enable them to be used for tracking, detection, and in biosensing applications. Recombinant phages can also be used to lyse bacterial cells that produce recombinant proteins, as a rapid method to enable extraction and high-level purification of potentially valuable and/or industrially important proteins. Also disclosed is a system that can also be used to control the activity of a protein of interest, by taking advantage of an interaction between Qtip and a phage repressor protein; a phage repressor protein can be fused to a protein-of-interest, and by controlling the expression of qtip, the phage repressor protein fused to a protein-of-interest will be inactivated when Qtip is expressed and interacts with the phage repressor protein.

A composition for preventing or treating an infection or disease caused by a pathogenic Escherichia coli includes a Myoviridae bacteriophage (Esc-COP-18) having an ability to lyse the pathogenic Escherichia coli and a pharmaceutically acceptable carrier. A method for preventing or treating an infection or disease caused by a pathogenic Escherichia coli includes administering to a subject a Myoviridae bacteriophage and lysing the pathogenic Escherichia coli by the Myoviridae bacteriophage.

Provided herein are methods and compositions for killing a target bacterium. Also disclosed are engineered bacteriophages.

Bacteriophage covalently attached to a carrier particle with an average diameter of from 0.1 microns to 15 microns, are used in topical treatment of bacterial infection. Bacteriophage covalently attached to a carrier particle of average diameter 7 microns or less are used in systemic treatment of bacterial infection. A plurality of bacteriophages lytic against different bacterial strains gives wide antibacterial activity. A combination therapy comprises administration of antibiotic and bacteriophage covalently attached to a carrier particle.

The present invention relates to bacteriophage therapy. More particularly, the present invention relates to novel bacteriophages having a high specificity against Pseudomonas aeruginosa strains, their manufacture, components thereof, compositions comprising the same and the uses thereof in phage therapy.

The present disclosure relates to bacteriophage ΦCJ28 (KCCM11466P) and a composition containing the same as an active ingredient. Further, the present disclosure relates to a method for preventing and/or treating infective diseases caused by enterotoxic Escherichia coli (ETEC) of animals excluding humans by using the composition. A bacteriophage ΦCJ28 (KCCM11466P) has a specific ability to kill enterotoxigenic Escherichia coli.