Performance Metrics for Slaughter and Dressing Hygiene at Australian Beef Export Establishments

Area of Science:

• Food safety
• Microbiology
• Animal processing

Background:

• Hygienic control is critical in beef cattle slaughter and dressing.
• Export processing establishments face scrutiny for microbial contamination.

Purpose of the Study:

• To examine hygienic control during beef cattle slaughter and dressing.
• To evaluate the effectiveness of microbial interventions in reducing contamination.

Main Methods:

• Sampling at two stages: post-hide removal and pre-chilling.
• Analysis of hindquarter and forequarter samples from 24 establishments.
• Comparison between establishments using trimming alone versus trimming with microbial intervention.

Main Results:

• Overall carcass contamination was low and decreased from hide removal to chilling.
• Hindquarters had higher indicator bacteria prevalence than forequarters.
• Microbial interventions significantly reduced indicator bacteria compared to trimming alone, but Salmonella reduction was not significant.

Conclusions:

• Beef carcass contamination levels are generally low post-slaughter.
• Microbial interventions enhance bacterial reduction beyond trimming alone.
• End-product contamination is a more reliable performance metric than process reduction.