This invention discloses a strain of *Bacillus belyceae* with broad-spectrum
antibacterial activity and its application in the prevention and treatment of
necrotic enteritis in poultry. The *Bacillus belyceae* strain provided by this invention (… Bacillus from Velez The
genome of strain GDG25CB056 is approximately 3.91 Mb in size, contains no
virulence factors, and is rich in
gene clusters encoding non-ribosomal peptides and
polyketide synthases. Studies have confirmed that this strain exhibits significant growth advantages, strong tolerance to high temperatures,
gastric acid, and bile salts, which facilitates
intestinal colonization. It can produce siderophores and various enzymes, and has overcome the technical
bottleneck of a narrow antibacterial spectrum, possessing broad-spectrum
antibacterial activity, especially strong specific antagonistic activity against
Clostridium perfringens.
In vivo experiments have shown that this strain can significantly reduce the
Clostridium perfringens load in the
cecum of chicks with
necrotizing enterocolitis, alleviate intestinal congestion and swelling, repair damaged intestinal villi, and enhance mucosal
barrier function, providing a safe and efficient strain resource for the prevention and treatment of bacterial enteric diseases.