USDA
The small-scale, pasture-raised poultry production model is a growing niche in
the locally grown food movement. There is limited research that focuses on the
food safety of small-scale broiler processing methods. The objective of this
study was to compare Salmonella and Campylobacter prevalence and concentrations on pasture-raised broilers processed on-farm, in a small United States Department of Agriculture (USDA)-Inspected custom slaughter facility (U-IF), and in a Mobile Processing Unit (MPU) pilot plant. A total of 120, 100, and 50 post-chill, pasture-raised broiler carcasses were sampled from each processing method, respectively. Salmonella and Campylobacter concentrations in whole carcass rinses were determined using a 3-tube Most Probable Number (MPN) method for Salmonella and direct plating method for Campylobacter according to the USDA-Food Safety and Inspection Service (FSIS) protocols. Salmonella prevalence and concentrations on-farm (89% and 1.78 MPN/carcass [95% CI: 1.60-1.96]), USDA-IF (43% and 0.78 MPN/carcass [95%CI: 0.58-0.98]) were significantly (P <0.05) different. Campylobacter prevalence was not significantly (P >0.05) different on carcasses processed by the three methods (70% on-farm, 82% USDA-IF, and 100% MPU). The mean log10 Campylobacter concentrations in MPU processed carcasses (5.44 CFU/carcass [95% CI: 5.24-5.63]) was significantly higher (P < 0.05) compared to on-farm (2.32 CFU/carcass [95% CI: 2.06-2.80]) and USDA-IF (2.44 CFU/carcass (95% CI: 2.03-2.85]). Based on the results of this baseline study, most pasture-raised broilers processed by the three methods were contaminated with Salmonella and/or Campylobacter with the exception of MPU carcasses on which Salmonella was not detected. Further research is needed to assess other potential risk factors such as farm and regional differences.
Posted in Bacteria, Campylobacter, Food Hygiene, Food Illness, Food Inspections, Food Micro Blog, Food Microbiology, Food Safety, Food Safety Alert, Food Technology, Food Testing, Microbiology, Pathogen, Research, Salmonella
Tagged climate, environment, food, salmonella prevalence, science, technology