Inhibition of selected pathogens inoculated on the surface of catfish fillets by high molecular weight chitosan coating


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Karsli B. , Caglak E. , LI D., RUBIO N. K. , JANES M., PRINYAWIWATKUL W.

INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, cilt.54, ss.25-33, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 54 Konu: 1
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1111/ijfs.13897
  • Dergi Adı: INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
  • Sayfa Sayıları: ss.25-33

Özet

Antibacterial activity of high molecular weight water-soluble (HMWWS) chitosan (800 kDa) was investigated against four Gram-negative (Escherichia coli, Salmonella typhimurium, Vibrio cholerae and Vibrio parahaemolyticus) and two Gram-positive (Staphylococcus aureus and Listeria monocytogenes) bacteria. Catfish fillets were surface-inoculated with these food-borne pathogens and coated with chitosan dissolved in aspartic acid (AS) or acetic acid (AC) solution at different concentrations (1% or 3%). Samples were stored at 4 degrees C for 8 days, except for those inoculated with Vibrio species (10 degrees C for 6 days). Overall, the most effective coating treatment was the 3% HMWWS chitosan in AS solution (800AS3%). Compared with the control, significant (P < 0.05) reductions caused by 800AS3% were observed for all tested pathogens at the end of storage. The growth of V. parahaemolyticus was completely suppressed by 800AS3%. This study demonstrated that HMWWS chitosan in AS solution could be used as an alternative antimicrobial coating for catfish fillets.