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Synergistic, bacteriostatic effect of propolis and glycerol against Listeria monocytogenes in chocolate milk under refrigerated storage.
Michailidis, Georgios F; Thamnopoulos, Ioannis-Angelos I; Fletouris, Dimitrios J; Angelidis, Apostolos S.
Afiliação
  • Michailidis GF; Laboratory of Safety and Quality of Dairy Foods, Department of Hygiene and Technology of Food of Animal Origin, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
  • Thamnopoulos II; Laboratory of Safety and Quality of Dairy Foods, Department of Hygiene and Technology of Food of Animal Origin, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
  • Fletouris DJ; Laboratory of Safety and Quality of Dairy Foods, Department of Hygiene and Technology of Food of Animal Origin, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
  • Angelidis AS; Laboratory of Safety and Quality of Dairy Foods, Department of Hygiene and Technology of Food of Animal Origin, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Food Sci Technol Int ; 27(1): 46-55, 2021 Jan.
Article em En | MEDLINE | ID: mdl-32515602
Propolis ethanolic extracts, with or without glycerol, were added into pasteurized, non-fat chocolate milk, which was artificially contaminated with Listeria monocytogenes. The addition of propolis ethanolic extracts dissolved into glycerol led to a definite anti-listerial effect in milk stored at 4 ℃, with both propolis concentrations tested (2 or 4 mg of dry propolis ethanolic extract per milliliter of chocolate milk) leading to inhibition of L. monocytogenes growth throughout 20 days of storage. The combined addition of propolis ethanolic extracts with glycerol was also effective in significantly reducing the rate of growth of L. monocytogenes in chocolate milk stored under improper (10 ℃) refrigeration storage conditions (more than five-fold increase in the generation time of L. monocytogenes compared to control trials). Finally, the combined addition of a deodorized propolis ethanolic extract with glycerol resulted in a significant anti-listerial effect upon storage of contaminated milk at 4 ℃ (more than three-fold increase in the generation time of L. monocytogenes compared to controls) and in a smaller anti-listerial effect upon milk storage at 10 ℃ (two-fold increase in the generation time of the pathogen compared to controls). Of note, chocolate milk containing deodorized propolis ethanolic extract and glycerol received a positive consumer acceptability score on the nine-point hedonic scale (median acceptability score of "7"). Hence, propolis may possess a promising role as a natural anti-listerial preservative in dairy drinks.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Própole / Leite / Microbiologia de Alimentos / Glicerol / Listeria monocytogenes Limite: Animals Idioma: En Revista: Food Sci Technol Int Assunto da revista: CIENCIAS DA NUTRICAO Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Grécia País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Própole / Leite / Microbiologia de Alimentos / Glicerol / Listeria monocytogenes Limite: Animals Idioma: En Revista: Food Sci Technol Int Assunto da revista: CIENCIAS DA NUTRICAO Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Grécia País de publicação: Estados Unidos