EFFECT OF GROWTH TEMPERATURE AND BIOFILM AGE ON THE RESISTANCE OF SALMONELLA TYPHIMURIUM BIOFILMS TO BACTERIOPHAGE

Mohammadi, R and Moradi, M and Tajik, H and Ghasem, H and Modaresi, R and Khalili Sadaghiani, S (2017) EFFECT OF GROWTH TEMPERATURE AND BIOFILM AGE ON THE RESISTANCE OF SALMONELLA TYPHIMURIUM BIOFILMS TO BACTERIOPHAGE. URMIA MED J, 28 (3). pp. 173-182. ISSN 1027-3727

Preview

Text 3 Mohammadi A-10-2520-2.pdf Download (674kB) | Preview

Abstract

Salmonella Typhimurium is among the most important food-borne disease. This study was conducted to investigate the anti-biofilm effect of the S. Typhimurium phage against Salmonella formed in chicken meat model. Materials & Methods: The effects of different phage concentrations (104, 106 and 108 PFU/mL) with two contact times (10 and 20 min) on one and 7 days old biofilm adhered to stainless steel coupon in chicken broth at 15, 8 and 4 °C were evaluated. Results: The results showed that the bacteria had an ability to adhere to the coupons and form biofilm in chicken broth, the biofilm levels were significantly (0.05 ≥ P) higher at 15 °C for 7 days. Increasing the phage concentrations, resulted in no significant biofilm removal properties and the activity was not influenced by the phage contact times. The anti-biofilm activity was influenced by the age of biofilm, in this case, one day-old biofilm was more sensitive than 7 days old. Conclusion: From the study it can be concluded, that in chicken model, the phage exhibited biofilm removal activity on Salmonella only at high concentrations, then the use of a combination of methods to control biofilm is recommended

Actions (login required)

View Item