Factors affecting salmonellae recovery from broiler carcasses treated with trisodium phosphate
Bourassa, Dianna Viola
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The effectiveness of trisodium phosphate application on the recovery of native salmonellae from broiler carcasses was investigated. Experiment 1 examined the residual effects of TSP following immersion chilling on salmonellae recovery when sampled on the day of processing and after refrigerated storage for 7 days. When carcasses were treated with TSP, salmonellae recovery was significantly lower than that of the control carcasses on both sampling days demonstrating a residual effect. Salmonellae recovery was also shown to decrease after 7 days of refrigeration for control groups. Experiment 2 examined the role of enrichment pH in TSP’s effectiveness against salmonellae. However, in this experiment the alkaline TSP and the alkalized peptone enrichment carcasses (pH shock) did not have a lower incidence of salmonellae recovery than the neutralized-TSP and control carcasses. The inability of TSP to decrease salmonellae recovery in Experiment 2 was speculated to be due to lack of washing action, which would typically occur during immersion chilling.