Abstract: Provided are compositions and methods for use in selectively killing one or more of C. perfringens, C. sordelli and C. histolyticum. The compositions include lysin PlyCP025, as well as catalytically active fragments thereof, and variants thereof that retain killing activity. Methods for reducing one or more of C. perfringens, C. sordelli or C. histolyticum bacteria are provide and involve contacting such bacteria with a composition that contains PlyCP025 or an enzymatically active fragment or variant thereof, which can be provided as recombinant polypeptides. The composition and methods are useful for human and veterinary purposes. Diagnostic approaches are also included by contacting a sample obtained or derived from an animal, with a recombinant polypeptide, and detecting binding of the polypeptide to bacteria in the sample if said bacteria that are bound to the polypeptide are present in the sample. The polypeptide may thus be detectably labeled to produce a detectable signal.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: Provided are polypeptides and compositions comprising the polypeptides for use in killing and/or inhibiting growth of Gram-negative bacteria, particularly P. aeruginosa. The polypeptides are contiguous polypeptides (lysocins) that contain an engineered bacteriocin segment that can be translocated through an outer membrane channel of the Gram-negative bacteria, such as Domain I of the S-type poycin from P. aeruginosa bacterocin pyocin S2 (PyS2) linked to a lysin catalytic segment that has peptidoglycan (PG) hydrolase activity. The lysin catalytic segment can be a catalytic segment of GN4 lysin or any other lysin catalytic segment or a hydrolytic enzyme thereof that has PG hydrolase activity.

Abstract: Acinetobacter lysin polypeptides and variants peptides with killing activity against gram negative bacteria. Methods for treating bacterial infections or bacterial colonization using Acintobacter lysin polypeptides.

Abstract: The present description relates to chimeric bacteriophage lysins useful for the identification and/or reduction of staphylococcal populations. For example, a chimeric bacteriophage lysin was engineered and shown to effectively kill all strains of staphylococci tested including antibiotic resistant methicillin-resistant S. Aureus and VISA.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: Provided are methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-negative bacteria, including Klebsiella, Enterobacter, and Pseudomonas, and related conditions. The compositions and methods utilize Klebsiellapneumonia, Enterobacter, and Pseudomonas derived bacteriophage lysins, and variants thereof, including truncations thereof.

Abstract: Provided are compositions and methods for use in selectively killing one or more of C. perfringens, C. sordelli and C. histolyticum. The compositions include lysin PlyCP025, as well as catalytically active fragments thereof, and variants thereof that retain killing activity. Methods for reducing one or more of C. perfringens, C. sordelli or C. histolyticum bacteria are provide and involve contacting such bacteria with a composition that contains PlyCP025 or an enzymatically active fragment or variant thereof, which can be provided as recombinant polypeptides. The composition and methods are useful for human and veterinary purposes. Diagnostic approaches are also included by contacting a sample obtained or derived from an animal, with a recombinant polypeptide, and detecting binding of the polypeptide to bacteria in the sample if said bacteria that are bound to the polypeptide are present in the sample. The polypeptide may thus be detectably labeled to produce a detectable signal.

Abstract: The present disclosure relates to chimeric bacteriophage lysins useful for the identification and/or reduction of staphylococcal populations. For example, a chimeric bacteriophage lysin was engineered and shown to effectively kill all strains of staphylococci tested including antibiotic resistant methicillin-resistant S. aureus (MRSA) and vancomycin intermediate S. aureus (VISA).

Abstract: Provided are methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of Gram-negative bacteria, including Pseudomonas, and related conditions. Provided are compositions and methods incorporating and utilizing Pseudomonas aeruginosa derived bacteriophage lysins, and variants thereof, including truncations thereof. Methods for treatment of humans and non-human animals are provided.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: Acinetobacter lysin polypeptides and variants peptides with killing activity against gram negative bacteria. Methods for treating bacterial infections or bacterial colonization using Acinetobacter lysin polypeptides.

Abstract: The present invention relates to methods and compositions for use in modulating, including inhibiting the growth and/or reducing the virulence of, gram-positive bacteria. The present invention provides methods and compositions for disrupting the cell wall and/or cell membrane in gram-positive bacteria such that cell wall or cell membrane target(s) are rendered exposed or accessible and sensitive to a modulation thereof. Methods for modulation of one or more gram-positive bacterial cell wall or cell membrane targets in a gram-positive bacteria are provided comprising disrupting the cell wall such that the cell wall or cell membrane target, which is particularly a sortase, is rendered exposed or accessible and sensitive to a modifying, modulating or binding agent, which is particularly an antibody or fragment thereof, wherein the cell wall or cell membrane target is inaccessible or relatively insensitive to the modifying, modulating or binding agent in the absence of cell wall disruption.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: The present invention provides methods, compositions and articles of manufacture useful for the prophylactic and therapeutic amelioration and treatment of gram-positive bacteria, including Streptococcus and Staphylococcus, and related conditions. The invention provides compositions and methods incorporating and utilizing Streptococcus suis derived bacteriophage lysins, particularly PlySs2 and/or PlySs1 lytic enzymes and variants thereof, including truncations thereof. Methods for treatment of humans are provided.

Abstract: Provided are compositions, methods and kits that are useful for detecting, inhibiting the growth of, and killing bacteria. The compositions include recombinant, chimeric polypeptides that contain at least one immunoglobulin fragment crystallizable region (Fc) segment and at least one additional segment that contains a binding domain that is specific for a bacterial cell wall substrate. The binding domain is one from one or more of a bacterial autolysin, a bacteriophage lysin, a bacteriophage tail or tail fiber, or a bacteriocin. Method of using the polypeptides for detecting, inhibiting the growth of, and killing bacteria are provided and involve contacting bacteria with the polypeptides. Methods of making the polypeptides include expressing the polypeptides in cells, and separating the polypeptides from the cells. Polynucleotides, such as expression vectors, that encode the chimeric polypeptides are also provided.

Abstract: Acinetobacter lysin polypeptides and variants peptides with killing activity against gram negative bacteria. Methods for treating bacterial infections or bacterial colonization using Acintobacter lysin polypeptides.

Abstract: The present invention provides isolated dimeric Streptococcus-specific phage lysins having two Streptococcus-specific phage lysin monomers covalently linked to each other, and having killing activity against one or more Streptococcus bacteria. Also provided for are pharmaceutical compositions of dimeric lysins and their use in therapeutic treatment or alleviation of infections or bacterial colonizations. The dimeric lysins may also be used to decontaminate porous and non-porous surfaces or devices.