Overview
ISO 17604:2015 - Microbiology of the food chain - Carcass sampling for microbiological analysis - specifies internationally harmonized methods for collecting microbiological samples from the surfaces of slaughtered animal carcasses. The standard covers sampling for process hygiene control, risk‑based assurance systems (including HACCP‑based verification), and monitoring or surveillance programmes to detect and enumerate indicator organisms and pathogens on carcasses of large mammals, poultry, small animals and game. Annex A identifies typical sampling sites on different species.
Key topics and technical requirements
- Sampling objectives and plans: Sampling must be driven by the purpose (process control, surveillance, risk‑based systems) and consider production volume, slaughterhouse practices, and historical monitoring data.
- Sampling points on the production line: Examples include after dehiding/flaying, after evisceration, after washing or polishing, immediately before or after chilling - choose points by risk and likelihood of contamination.
- Sampling sites on carcasses: Select areas most likely to be contaminated; consistency in site selection is important for trend analysis. Annex A illustrates frequent high‑risk sites.
- Sampling techniques: The standard permits and describes excision methods (cork borer, template excision, skin sampling), swabbing methods (wet/dry stick swabs, sponge/tampon/small cloth), and carcass rinsing (commonly used for poultry and some small animals). Choice depends on sensitivity required, practicality and whether destructive sampling is acceptable.
- Sample handling: Guidance covers storage, transport and initial laboratory preparation (swabs, excised tissue, and rinses) prior to microbiological examination.
- Repeatability and method performance: Notes that excision and rinsing often give better repeatability than swabbing, but excision samples a smaller area and is destructive.
Practical applications and users
ISO 17604:2015 is applicable to:
- Slaughterhouse QA and process hygiene teams implementing routine verification and validation of sanitation and HACCP controls.
- Food safety laboratories performing detection and enumeration of total counts, Enterobacteriaceae and targeted pathogens.
- Regulators and public‑health agencies designing monitoring and surveillance programmes to assess prevalence of pathogens.
- Meat processors and exporters seeking harmonized sampling methods for trade and compliance.
Practical benefits include improved comparability of results, informed risk‑based sampling strategies, and more reliable trend analysis for process control and food safety assurance.
Related standards
ISO 17604 references and complements general microbiological preparation and examination standards such as:
Keywords: ISO 17604:2015, carcass sampling, microbiology of the food chain, excision, swabbing, carcass rinsing, sampling plan, slaughter establishments, poultry, large mammals, HACCP, process hygiene control, surveillance programmes.
