Disclosed herein is a targeted tumour-infiltrating bacteriophage. The bacteriophage is engineered to present an epidermal growth factor receptor (EGFR)-binding moiety on the bacteriophage cell surface. The EGFR-binding moiety is capable of binding the extracellular domain of the EGFR. Also disclosed are compositions, kits, methods and uses thereof. Also disclosed is a method of treating a tumour in a subject in need thereof, the method comprising: administering to the subject a composition comprising a plurality of bacteriophage engineered to present an epidermal growth factor receptor (EGFR)-binding moiety on the bacteriophage cell surface in a dose effective to treat the tumour, wherein the tumour is an EGFR-positive tumour and the EGFR-binding moiety is capable of binding an EGFR extracellular domain.

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 a Salmonella bacteriophage, in particular to a Siphoviridae bacteriophage with a wide host spectrum and a strong lytic activity against Salmonella pullorum. The above-mentioned Salmonella pullorum bacteriophage is named SP4, and is deposited at the China General Microbiological Culture Collection Center, the deposit date is Jul. 27, 2017 and the deposit number is CGMCC No, 14332, The bacteriophage has a strong lysis effect on Salmonella, and the bacteriophage can also reduce the mortality rate of chicks infected with Salmonella pullorum, The preparation can be used alone or as a cocktail, and provides a safe, non-toxic and side-effect-free and residual effect-free bacteriophage product for the treatment of the infections caused by Salmonella of chicken origin, Salmonella of duck origin, Salmonella of mink origin, Salmonella of food origin and Salmonella of pig origin.

The present invention relates to a Siphoviridae bacteriophage STP-2 (Accession number: KCTC 12853BP) isolated from nature and characterized by having the ability to destroy Salmonella Typhimurium and having a genome represented by SEQ ID NO:1; and to a method for preventing and treating diseases caused by Salmonella Typhimurium using Siphoviridae bacteriophage STP-2 containing the same as an active ingredient.

The present invention relates to a vector, preferably included in a delivery vehicle, comprising no more than 100, preferably no more than 10, restriction sites recognized by the restriction enzymes encoded by each bacterium of a group of bacteria of interest. The invention also relates to the use of said vector, preferably included in a delivery vehicle, as a drug, especially in the treatment of a disease in a patient in need thereof.

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 a vector, preferably included in a delivery vehicle, comprising no more than (100), preferably no more than (10), restriction sites recognized by the restriction enzymes encoded by each bacterium of a group of bacteria of interest. The invention also relates to the use of said vector, preferably included in a delivery vehicle, as a drug, especially in the treatment of a disease in a patient in need thereof.

The present invention relates to a Siphoviridae bacteriophage Str-INP-1 (Accession NO: KCTC 12687BP) that is isolated from the nature and can kill specifically Streptococcus iniae cells, which has a genome represented by the nucleotide sequence of SEQ. ID. NO: 1, and a method for preventing and treating the infections of Streptococcus iniae using the composition comprising said bacteriophage as an active ingredient.