
Asma Entezari
National University , IranTitle: The composite film of gelatin-pullulan containing SALMONELEXTM bacteriophages for bio-control Salmonella strains
Abstract
According to emergence of resistance bacteria to antibiotics in the food industry, the
application of bacteriophages may be a solution due to their specific function on goal
bacteria. In this study, composite film of gelatin-pullulan loaded with bacteriophages was
prepared, and mechanical, water vapor permeability, and transparency properties of film was
investigated. As well as, its anti-bacterial activity against Salmonella typhimurium and
Salmonella enteritidis on agar media and meat was studied. The results showed that
incorporation of phages into film increased elongation at break and transparency, also water
vapor permeability did not have significant changing. Anti-bacterial activity of film on the
media agar and beef meat at 11 temperature against Salmonella typhimurium were higher
than Salmonella enteritidis. Population of S. typhimurium and S. enteritidis on the beef meat
decreased 1.5 log unit (CFU/ml) and 0.8 log unit (CFU/ml) after 24 h compare to control
groups, respectively. This edible film containing phages as a bio-control approach can
improve quality and food safety on the matrix food against Salmonella pathogen bacteria,
especially since it has a specific action