The present disclosure provides compositions including recombinant B11 bacteriophages, methods for making the same, and uses thereof. The recombinant B11 bacteriophages disclosed herein are useful for the identification and/or antibiotic susceptibility profiling of specific bacterial strains/species present in a sample.

The present invention relates to the field of proteases. More specifically, the present invention provides compositions and methods useful for profiling protease activity using phage display. In one embodiment, a display vector useful for profiling protease activity comprises a nucleic acid sequence encoding (a) a peptide to be displayed on the surface of the vector; (b) a first affinity tag C-terminal to the peptide; and (c) a second affinity tag N-terminal to the peptide. The display vector can comprise a virus, bacteriophage, yeast, bacteria, retrovirus, ribosome or mRNA. In particular embodiments, the peptide comprises a human peptidome library peptide.

A visual continuous spatial directed evolution method is disclosed. The host grows and moves in a solid culture space, the host carrying a foreign target gene to be evolved and containing a gene element that assists the evolution of the target gene, the target gene being correlated with the growth and movement of the host. Depending on different spatial distribution patterns formed in the solid culture space during the growth and movement of the host, screening is performed to obtain an evolved product. This method is carried out directly in the solid culture space. Depending on images of different spatial distribution morphologies visible to the naked eye that are locally formed, selection of evolved products is performed without the need for liquid fed-batch culture equipment. In addition, the evolution effect is visually observed through the infection spots formed during evolution, so that no real-time monitoring equipment is required.

The present invention relates to a new cocktail of bacteriophages with specific lytic activity against Salmonella enteritidis, Salmonella typhimurium and Salmonella paratyphi B., for reducing, eliminating and/or preventing them in farm animals and animals from the poultry sector, such as poultry, hens and breeding hens, in addition to eggs. It may be administered as an additive in the feed, in water or by spray. Moreover, the cocktail may be used as a disinfectant in work areas of farms and abattoirs, and in processed foods, without affecting the organoleptic properties of the product.

The present disclosure provides compositions including recombinant K1E bacteriophages, methods for making the same, and uses thereof. The recombinant K1E bacteriophages disclosed herein are useful for the identification and/or antibiotic susceptibility profiling of specific bacterial strains/species present in a sample.

The present disclosure provides compositions including recombinant B 11 bacteriophages, methods for making the same, and uses thereof. The recombinant B 11 bacteriophages disclosed herein are useful for the identification and/or antibiotic susceptibility profiling of specific bacterial strains/species present in a sample.

The present disclosure provides compositions including recombinant B11 bacteriophages, methods for making the same, and uses thereof. The recombinant B11 bacteriophages disclosed herein are useful for the identification and/or antibiotic susceptibility profiling of specific bacterial strains/species present in a sample.

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 invention relates to a bactericide composition based on bacteriophages for the control of black plague in plants or parts thereof, preferably walnuts, a preparation method and application. The invention provides methods for the isolation, propagation and application of bacteriophages against phytopathogens affecting trees/plants that are of commercial interest for their fruit, flowers etc., for the prevention, treatment or reduction of signs, in particular, for Xanthomonas a. pv juglandis in walnuts.

Methods for determining bacterial identity and susceptibility or resistance to antibiotic or antimicrobial agents are provided. In one embodiment, the bacteria is cultured in the presence or absence or the antibiotic agent to generate a plurality of primary cultures, which are then cultured in the presence or absence of transforming phages to generate a first secondary culture that comprise transformed bacteria that have been treated with the antibiotic agent and a second secondary culture that comprises transformed bacteria that have not been treated with the antibiotic agent. The recombinant phages are specific to the bacteria and comprise a heterologous marker. The susceptibility or resistance of the bacteria to the antibiotic or antimicrobial agent is determined by comparing a level or activity of the marker in the first and second secondary cultures.