The present invention relates to a bacteriophage-derived recombinant protein having antimicrobial activity against gram-negative bacteria, and the bacteriophage-derived recombinant protein LysSS exhibits killing activity to gram-negative bacteria and thus can prevent or treat infectious diseases caused by bacteria, and can be widely used in antibiotics, disinfectants, food additives, feed additives, and the like, wherein the LysSS uses peptidoglycan, which is a component of the cell wall of bacteria, as a substrate, and exhibits bacterial killing ability due to peptidoglycan degradation and the peptidoglycan exists only in bacteria and not in humans or animals.

The present invention relates to a Siphoviridae bacteriophage Esc-COP-9 (Accession number: KCTC 13131BP) isolated from nature, which has the ability to specifically kill Escherichia coli and which includes a genome expressed by SEQ. ID. NO: 1, and to a method of preventing and treating a pathogenic Escherichia coli infection using a composition including the same as an active ingredient.

Provided herein are, inter alia, compositions, systems, and methods for preventing or treating acne. Included are compositions, combinations, systems, and methods comprising at least one Propionibacterium acnes bacteriophage, at least one anti-acne compound, and a pharmaceutically acceptable carrier. Also included are compositions, combinations, and systems comprising a Propionibacterium acnes bacteriophage and an enzyme. Methods for preventing or treating acne are also provided.

Provided are compositions and methods for selectively reducing the amount of antibiotic resistant and/or virulent bacteria in a mixed bacteria population, or for reducing any other type of unwanted bacteria in a mixed bacteria population. The compositions and methods involve targeting bacteria that are differentiated from other members of the population by at least one unique clustered regularly interspaced short palindromic repeats (CRISPR) targeted DNA sequence. The compositions and methods can be readily adapted to target any bacteria or any bacteria plasmid, or both.

Provided are compositions and methods for selectively reducing the amount of antibiotic resistant and/or virulent bacteria in a mixed bacteria population, or for reducing any other type of unwanted bacteria in a mixed bacteria population. The compositions and methods involve targeting bacteria that are differentiated from other members of the population by at least one unique clustered regularly interspaced short palindromic repeats (CRISPR) targeted DNA sequence. The compositions and methods can be readily adapted to target any bacteria or any bacteria plasmid, or both.

The present invention relates to Siphoviridae bacteriophage Vib-ANP-1(accession number KCTC 13075BP) having the ability to specifically kill Vibrio anguillarum bacteria and a genome represented by SEQ ID NO: 1 and isolated from nature, and a method for prevention or treatment of Vibrio anguillarum bacterial infection by using a composition containing the same bacteriophage as an effective ingredient.

The present invention relates to Siphoviridae bacteriophage Ent-FAP-4 (accession number KCTC 12854BP), separated from nature, which is capable of specifically killing Enterococcus faecium and has a genome expressed by sequence number 1, a pharmaceutical composition, which comprises same as an active ingredient, and a method for preventing or treating diseases, induced by Enterococcus faecium, by administering the pharmaceutical composition.

Provided are compositions and methods for selectively reducing the amount of antibiotic resistant and/or virulent bacteria in a mixed bacteria population, or for reducing any other type of unwanted bacteria in a mixed bacteria population. The compositions and methods involve targeting bacteria that are differentiated from other members of the population by at least one unique clustered regularly interspaced short palindromic repeats (CRISPR) targeted DNA sequence. The compositions and methods can be readily adapted to target any bacteria or any bacteria plasmid, or both.

Provided are compositions and methods for selectively reducing the amount of antibiotic resistant and/or virulent bacteria in a mixed bacteria population, or for reducing any other type of unwanted bacteria in a mixed bacteria population. The compositions and methods involve targeting bacteria that are differentiated from other members of the population by at least one unique clustered regularly interspaced short palindromic repeats (CRISPR) targeted DNA sequence. The compositions and methods can be readily adapted to target any bacteria or any bacteria plasmid, or both.

Provided are compositions and methods for selectively reducing the amount of antibiotic resistant and/or virulent bacteria in a mixed bacteria population, or for reducing any other type of unwanted bacteria in a mixed bacteria population. The compositions and methods involve targeting bacteria that are differentiated from other members of the population by at least one unique clustered regularly interspaced short palindromic repeats (CRISPR) targeted DNA sequence. The compositions and methods can be readily adapted to target any bacteria or any bacteria plasmid, or both.