Disclosed herein is a particle delivery system comprising electrospun nanofiber comprised of coaxial fiber with a microfluidic core. Iron-doped apatite nanoparticles (IDANPs) have demonstrated a unique influence over phage killing of bacteria, whereby, IDANP-exposed bacterial cultures experience 2× the bacterial death as controls. IDANPs consist of hydroxyapatite (HA) doped with iron. HA is a mineral known to be biocompatible and analogous to the inorganic constituent of mammalian bone and teeth and has been approved by the Food and Drug Administration (FDA) for many applications in medicine and dentistry. Previous work has shown that for IDANPs to enhance antibacterial activity of phage to the greatest extent, bacterial cultures should be exposed to IDANPs for 1 hr prior to phage introduction. Biocompatible polymer materials which encase IDANPs and/or phage can be used to disseminate IDANPs and/or phage in a controlled manner into a physiological system for treatment of bacterial infection. When components of said materials contain micro- or nano-scale components, high surface-to-volume ratio for treatment delivery is garnered.

The present invention relates to the treatment of bacterial infections and the reduction of inflammatory response using bacteriophage compositions. In an aspect, provided herein are methods of treating a bacterial infection characterized by inflammation in a subject, the method comprising administering to the subject a bacteriophage composition that is essentially free of impurities, wherein the composition reduces inflammation

The present invention relates to a bacteriophage composition comprising one or more (suitably two or more, or three) bacteriophages selected from Sa87, J-Sa36, or Sa83, or mutants thereof. Also encompassed are the use of said bacteriophage compositions for medical or non-medical applications, as well as kits, bandages, and wound dressings comprising said bacteriophage compositions.

The present invention relates to the treatment of bacterial infections and the reduction of inflammatory response using bacteriophage compositions. In an aspect, provided herein are methods of treating a bacterial infection characterized by inflammation in a subject, the method comprising administering to the subject a bacteriophage composition that is essentially free of impurities, wherein the composition reduces inflammation.

Modified bacteriophage, uses thereof, and compositions containing the modified bacteriophage are described. The compositions are useful for human treatment and may treat various conditions, including bacterial infections.

A modified bacteriophage capable of infecting a plurality of different target bacteria, which bacteriophage includes a toxin gene encoding a toxin protein which is toxic to the target bacteria; wherein the bacteriophage is lytic; and wherein the bacteriophage expresses host range determinant proteins which have a plurality of bacterial host specificities.

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.

The subject matter of the instant invention relates to methods of enhancing harvesting of phages against a targeted host bacteria, as well as methods of identifying phages likely to have an enhanced propensity to infect and kill an infectious pathogenic bacteria in vivo, from samples comprising phages. The invention also relates to phage libraries, pharmaceutical compositions, methods of treatment, and phage-based diagnostic methods and methods of detecting bacteria related thereto.

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.