Probiotics and Antimicrobial Effect of Lactiplantibacillus plantarum, Saccharomyces cerevisiae, and Bifidobacterium longum against Common Foodborne Pathogens in Poultry

Joy Igbafe, Agnes Kilonzo-Nthenge, Samuel N. Nahashon, Abdullah Ibn Mafiz and Maureen Nzomo
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Joy Igbafe: Department of Agriculture and Environmental Sciences, Tennessee State University, 3500 John A. Merritt Boulevard, Nashville, TN 37209, USA
Agnes Kilonzo-Nthenge: Department of Human Sciences, Tennessee State University, 3500 John A. Merritt Boulevard, Nashville, TN 37209, USA
Samuel N. Nahashon: Department of Agriculture and Environmental Sciences, Tennessee State University, 3500 John A. Merritt Boulevard, Nashville, TN 37209, USA
Abdullah Ibn Mafiz: Department of Agriculture and Environmental Sciences, Tennessee State University, 3500 John A. Merritt Boulevard, Nashville, TN 37209, USA
Maureen Nzomo: Department of Agriculture and Environmental Sciences, Tennessee State University, 3500 John A. Merritt Boulevard, Nashville, TN 37209, USA

Agriculture, 2020, vol. 10, issue 9, 1-13

Abstract: The probiotic potential and antimicrobial activity of Lactiplantibacillus plantarum , Saccharomyces cerevisiae , and Bifidobacterium longum were investigated against Escherichia coli O157:H7, Salmonella typhimurium and Listeria monocytogenes . Selected strains were subjected to different acid levels (pH 2.5–6.0) and bile concentrations (1.0–3.0%). Strains were also evaluated for their antimicrobial activity by agar spot test. The potential probiotic strains tolerated pH 3.5 and above without statistically significant growth reduction. However, at pH 2.5, a significant ( p < 0.05) growth reduction occurred after 1 h for L. plantarum (4.32 log CFU/mL) and B. longum (5.71 log CFU/mL). S. cerevisiae maintained steady cell counts for the entire treatment period without a statistically significant ( p > 0.05) reduction (0.39 log CFU/mL). The results indicate at 3% bile concertation, 1.86 log CFU/mL reduction was observed for L. plantarum , while S. cerevisiae , and B. longum growth increased by 0.06 and 0.37 log CFU/mL, respectively. L. plantarum and B. longum demonstrated antimicrobial activity against E. coli O157:H7, S. typhimurium and L. monocytogenes . However, S. cerevisiae did not display any inhibition to any of the pathogens. The results indicate that L. plantarum and B. longum present probiotic potential for controlling E. coli O157:H7, S. and L. monocytogenes in poultry.

Keywords: probiotics; poultry; L. plantarum; S. cerevisiae; B. longum; acid tolerance; bile tolerance; antimicrobial inhibition (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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