Prevalence of Listeria monocytogenes in ready-to-eat foods, and growth boundary modeling of the selected strains in broth as a function of temperature, salt and nisin

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Şentürk E., Buzrul S., ŞANLIBABA P.

International Journal of Food Properties, cilt.25, sa.1, ss.2237-2253, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 1
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1080/10942912.2022.2130942
  • Dergi Adı: International Journal of Food Properties
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Compendex, Food Science & Technology Abstracts, Hospitality & Tourism Complete, Hospitality & Tourism Index, Veterinary Science Database, Directory of Open Access Journals
  • Sayfa Sayıları: ss.2237-2253
  • Anahtar Kelimeler: Growth, no growth boundaries, Predictive microbiology, Foodborne pathogens, Logistic regression, BACTERIAL-GROWTH, MEAT-PRODUCTS, ANTIBIOTIC SUSCEPTIBILITY, PH, RESISTANCE, NACL, PROBABILITY, DIVERSITY, SURVIVAL, SCOTT
  • Ankara Üniversitesi Adresli: Evet

Özet

© 2022, Published with license by Taylor & Francis Group, LLC. © 2022 Esra Şentürk, Sencer Buzrul and Pınar Şanlıbaba.The objectives of this study were to determine the prevalence of Listeria monocytogenes in ready-to-eat (RTE) foods, and the growth boundaries of two strains of L. monocytogenes isolated from RTE foods and one ATCC7644 strain under different temperature (4, 20, and 37°C), salt (0, 1, 2, 3, and 4% w/v), and nisin (0, 50, 100, 200, and 400 µg/mL) levels with different inoculum sizes (3, 4, 5, and 6 log10 CFU/mL). One hundred thirty-three retail RTE foods were examined and a total of 39 isolates were identified. The positive Listeria spp. and L. monocytogenes samples were 29.3% and 12.8%, respectively. Dairy and fruit-based RTE foods were L. monocytogenes negative whereas seafood-based (26.7%), meat-based (19.4%), poultry-based (16%), and vegetable-based (10%) RTE foods contained L. monocytogenes. It was shown that nisin was more effective than NaCl to avoid growth. Moreover, protective effect of NaCl on nisin activity was observed. As inoculum size increased probability of growth also increased. Suppressing the growth by using temperature, NaCl and nisin was more difficult in RTE-isolates strains (strains 120 and 137) than that of ATCC7644 strain. A mathematical model based on logistic regression could be used to determine growth limits of L. monocytogenes strains with a concordance of > 91%.