This disclosure provides materials and methods for reducing production of virulence factors in C. perfringens and or other pathogenic clostridia with related Agr-like QS systems using compounds that interfere with the Agr-like quorum sensing (QS) system. For example, Agr-like QS system inhibitors based on peptidomimetic compounds of the Agr-like QS system signaling peptide (SP) or the SP receptor of C. perfringens, and methods of using the Agr-like QS system inhibitors to prevent, treat, or ameliorate a disease associated with C. perfringens infection are provided.

Disclosed herein are embodiments of a combination and/or composition comprising a growth factor and one or more of silica, mineral clay, glucan, mannans, endoglucanohydrolase, yucca, quillaja, metal chelate, chromium compound, probiotic, polyphenol, direct fed microbial, copper species, vitamin, allicin, alliin, alliinase, yeast, growth promotant, preservative, antimicrobial, or vaccine. The growth factor may be an active growth factor such as an active insulin-like growth factor. Also disclosed are methods of administering the combination and/or composition to an animal. The combination and/or composition may provide a beneficial effect to the animal upon administration, such as, but not limited to, improved immune function, metabolism, milk production, growth, feed conversion, fertilization, reproduction, oocyte quality in a ruminant undergoing superovulation, embryo viability, muscle growth, muscle percentage, heart muscle development, egg product and/or quality, sperm production and/or quality, meat quality, or a combination thereof.

Disclosed are anti-avian pathogenic E. coli (APEC) agents as well as methods of using thereof.

Disclosed are anti-avian pathogenic E. coli (APEC) agents as well as methods of using thereof.

The present invention relates to Siphoviridae bacteriophage Lac-GAP-3 (Accession Number KCTC 12816BP) having the ability to specifically kill Lactococcusgarvieae bacteria and a genome represented by SEQ ID NO: 1 and isolated from nature, and a method for prevention and treatment of Lactococcusgarvieae bacterial infection by using a composition containing the same bacteriophage as an effective ingredient.

The present invention relates to Siphoviridae bacteriophage Lac-GAP-3 (Accession Number KCTC 12816BP) having the ability to specifically kill Lactococcusgarvieae bacteria and a genome represented by SEQ ID NO: 1 and isolated from nature, and a method for prevention and treatment of Lactococcusgarvieae bacterial infection by using a composition containing the same bacteriophage as an effective ingredient.

The present disclosure discloses an antimicrobial peptide Scyreprocin of Scylla paramamosain and a method thereof, wherein an amino acid sequence of the antimicrobial peptide Scyreprocin comprises a sequence shown in SEQ ID NO 01, and the antimicrobial peptide is expressed and purified by using genetic engineering technology. The recombinant antimicrobial peptide Scyreprocin has advantages of wide antimicrobial spectrum, good antimicrobial effect, and rapid germicidal rate, shows great application significance, and has good application in preparation of antimicrobial agents. The recombinant antimicrobial peptide Scyreprocin has no cytotoxicity to mouse hepatocytes AML12, human liver cells L02, and can be safely used for medical treatment or can be used as a feed composition.

The present disclosure provides methods and formulations for reducing ammonia and carbon dioxide emissions from a bovine using lubabegron, or a physiologically acceptable salt thereof. The present disclosure also provides bovine feed additives and bovine feed compositions.

The present disclosure provides methods and formulations for reducing ammonia and carbon dioxide emissions from a bovine using lubabegron, or a physiologically acceptable salt thereof. The present disclosure also provides bovine feed additives and bovine feed compositions.

A use of a substituted benzoguanidine derivative as a polymyxin antibiotic synergist, particularly as a synergist and a drug resistance reversal agent of the polymyxin antibiotic for inhibiting a sensitive strain, or a composition comprising the same in combination with a polymyxin antibiotic for preparing a compound pharmaceutical preparation for human or animal use in the treatment of a disease caused by a gram-negative bacterial infection or the preparation a growth-promoting feed additive and for the raising of livestock animals.