» Articles » PMID: 39303323

Influences of Bacillus Pumilus SA388 As an Environmentally Friendly Antibiotic Alternative on Growth Performance, Blood Biochemistry, Immunology, Cecal Microbiota, and Meat Quality in Broiler Chickens

Abstract

The widespread use of antibiotics causes the development of antibiotic-resistant bacterial strains, which have a severe impact on poultry productivity and human health. As a result, research is continuing to develop safe natural antibiotic alternatives. In the current study, Bacillus pumilus SA388 was isolated from the chicken feces and confirmed to be a probiotic. The selected strain was tested for its antimutagenic and antioxidant capabilities before being employed as a probiotic food supplement and antibiotic alternative. The effect of B. pumilus SA388 impact on broiler chickens' growth performance, gut microbiome, blood biochemical markers, immunological response, and meat quality was also studied. B. pumilus SA388 showed significant bactericidal activity against Streptococcus pyogenes, Listeria monocytogenes, Staphylococcus aureus, Escherichia coli, Salmonella typhi, and Klebsiella pneumonia. A total of 200 chickens were used in the present study, divided equally among four experimental groups (ten birds per group with 5 replicates): group 1 (control, G1) received a basal diet without B. pumilus SA388, group 2 (G2) received a basal diet supplemented with 0.4 mg/kg of B. pumilus SA388, group 3 (G3) received a basal diet supplemented with 0.8 mg/kg of B. pumilus SA388, and group 4 (G4) received a basal diet supplemented with 1.6 mg/kg of B. pumilus SA388. Over 35 d, the B. pumilus SA388-supplemented groups outperformed the G1 in terms of body weight gain, performance index, and feed conversion ratio, with a preference for the G4 treatment. The levels of alanine aminotransferase (ALT), aspartate transaminase (AST), low-density lipoprotein (LDL), and total cholesterol decreased significantly (P < 0.05) with increasing B. pumilus SA388 dosages compared to the control G1 group. Dietary supplementation of B. pumilus SA388 at 1.6 mg/kg (G4) significantly (P < 0.05) resulted in improved lipid profile, immunological response, thyroid function, and gut microbiota compared to the control group (G1). Compared to the broilers in the control treatment (G1), the addition of B. pumilus SA388 to broilers in G4 significantly (P < 0.05) enhanced juiciness, tenderness, aroma, and taste. Adding B. pumilus SA388 to chicken feed at different doses significantly (P < 0.05) decreased average feed intake while increasing economic and relative efficiency measures. In conclusion, B. pumilus SA388 has been proven to be an effective antibiotic and nutritional supplement.

References
1.
Salem H, Alqhtani A, Swelum A, Babalghith A, Melebary S, Soliman S . Heat stress in poultry with particular reference to the role of probiotics in its amelioration: An updated review. J Therm Biol. 2022; 108:103302. DOI: 10.1016/j.jtherbio.2022.103302. View

2.
Prazdnova E, Chistyakov V, Churilov M, Mazanko M, Bren A, Volski A . DNA-protection and antioxidant properties of fermentates from Bacillus amyloliquefaciens B-1895 and Bacillus subtilis KATMIRA1933. Lett Appl Microbiol. 2015; 61(6):549-54. DOI: 10.1111/lam.12491. View

3.
Swelum A, Elbestawy A, El-Saadony M, Hussein E, Alhotan R, Suliman G . Ways to minimize bacterial infections, with special reference to Escherichia coli, to cope with the first-week mortality in chicks: an updated overview. Poult Sci. 2021; 100(5):101039. PMC: 8010699. DOI: 10.1016/j.psj.2021.101039. View

4.
Salem H, Saad A, Soliman S, Selim S, Mosa W, Ahmed A . Ameliorative avian gut environment and bird productivity through the application of safe antibiotics alternatives: a comprehensive review. Poult Sci. 2023; 102(9):102840. PMC: 10393590. DOI: 10.1016/j.psj.2023.102840. View

5.
Saad A, Sitohy M, Sultan-Alolama M, El-Tarabily K, El-Saadony M . Green nanotechnology for controlling bacterial load and heavy metal accumulation in Nile tilapia fish using biological selenium nanoparticles biosynthesized by AS12. Front Microbiol. 2023; 13:1015613. PMC: 9816870. DOI: 10.3389/fmicb.2022.1015613. View