A systematic review-meta-analysis of chilling interventions and a meta-regression of various processing interventions for Salmonella contamination of chicken

Modeling cross-contamination during poultry processing: Dynamics in the chiller tank

“…However, the underlying mechanisms of cross contamination are still poorly understood and, furthermore, many studies evaluating the efficacy of intervention strategies during processing have presented inconsistent and even contradictory results. One reason for such issues is that studies were conducted at the lab or pilot scale under specific conditions that leave their results difficult to synthesize (Bucher et al, 2012).…”

Do any spray or dip treatments, applied on broiler chicken carcasses or carcass parts, reduce Salmonella spp. prevalence and/or concentration during primary processing? A systematic review–meta-analysis

“…In our case, we chose meta-regression to attempt to explain the variation observed in our data as a function of study-and trial-level covariates. This analysis was expanded to all other primary processing interventions captured by the larger scoping study to increase the power of our meta-regression and is reported elsewhere (Bucher et al, 2011). Briefly, Salmonella serotype, disinfectant type, as well as treatment time and pH were significantly associated with studies reporting reductions in Salmonella concentration.…”

“…The efficacy of various on-farm and processing interventions, identified and prioritized at the scoping stage (Farrar, 2009), was investigated through multiple, separate SReMAs, reported elsewhere (Bucher et al, 2011). The review protocol was developed a priori and pre-tested at the scoping stage, prescribing replicable procedures for each step of the SR process and following the PRISMA statement guidelines (Moher, Liberati, Tetzlaff, Altman, & PRISMA Group, 2009).…”

“…The review protocol was developed a priori and pre-tested at the scoping stage, prescribing replicable procedures for each step of the SR process and following the PRISMA statement guidelines (Moher, Liberati, Tetzlaff, Altman, & PRISMA Group, 2009). The protocol was consistently applied across various SReMAs and is described in detail elsewhere (Bucher et al, 2011;Farrar, 2009 The focused question of the SReMA reported herein was: Do any spray or dip treatments, applied on broiler chicken carcasses or carcass parts, reduce Salmonella spp. prevalence and/or concentration during primary processing?…”

“…Attempts to explain observed heterogeneity as a function of intervention-and studylevel covariates were done using meta-regression after merging the datasets from this study with those of the other processing interventions captured as part of the larger scoping study to increase the power of the analysis. Detailed methods, results and discussion of this meta-regression are reported elsewhere (Bucher et al, 2011). To capture the degree of variation in effect sizes, 95% prediction intervals were presented alongside MA summary effect measures (Borenstein et al, 2009).…”