title: Effects of combined treatments of electron-beam irradiation and addition of leek (Allium tuberosum) extract on reduction of pathogens in pork jerky.
abstract: This study investigated the combined effect of electron-beam irradiation and addition of leek (Allium tuberosum R.) extract on pork jerky inoculated with selected foodborne pathogens. Prepared pork jerky samples (control and samples with 1.0% leek extract) were inoculated with pathogens and subsequently irradiated at 0, 0.5, 1, 2, 3, and 4 kGy doses. In comparison with the control, samples with 1.0% leek extract showed significant reduction in the numbers of Escherichia coli, Listeria monocytogenes, and Salmonella Typhimurium. No viable counts were detected for Salmonella Typhimurium in both control and leek-extract samples, and for E. coli and L. monocytogenes in the leek-extract sample exposed to 3 kGy irradiation dose. The D(10) values for E. coli, L. monocytogenes, and Salmonella Typhimurium observed in the irradiated samples with leek extract were 0.39, 0.34, and 0.32 kGy, while the D(10) values in those without leek extract were 0.65, 0.65, and 0.39 kGy, respectively. Therefore, our results clearly showed that irradiation combined with leek extract was effective in reducing pathogens, suggesting that a low dose of irradiation combined with the addition of a natural antimicrobial agent can enhance the microbial safety and shelf-life of pork jerky.
authors.affiliation: Department of Animal Science and Biotechnology, Chungnam National University, Daejeon, Korea.
authors.forename: Mingu
authors.initials: M
authors.lastname: Kang
authors.forename: Hyun-Joo
authors.initials: HJ
authors.lastname: Kim
authors.forename: Dinesh D
authors.initials: DD
authors.lastname: Jayasena
authors.forename: Young Sik
authors.initials: YS
authors.lastname: Bae
authors.forename: Hae In
authors.initials: HI
authors.lastname: Yong
authors.forename: Mooha
authors.initials: M
authors.lastname: Lee
authors.forename: Cheorun
authors.initials: C
authors.lastname: Jo
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000494:pharmacology*; D027782:Chive / Q000737:chemistry*; D015169:Colony Count, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D005514:Food Irradiation / Q000379:methods*; D005516:Food Microbiology; D008089:Listeria monocytogenes / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D008460:Meat / Q000382:microbiology*; D010936:Plant Extracts / Q000494:pharmacology*; D012486:Salmonella typhimurium / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D013552:Swine
chemical_list: D000890:Anti-Infective Agents; D010936:Plant Extracts