Overview
EN ISO 21872-1:2017 (ISO 21872-1:2017) - Microbiology of the food chain - is a horizontal, harmonized method for the detection of potentially enteropathogenic Vibrio spp., specifically Vibrio parahaemolyticus, Vibrio cholerae and Vibrio vulnificus. Published under CEN/ISO, this standard applies to products intended for human consumption and animal feeding, and to environmental samples from areas of food production and handling. It provides a validated workflow for enrichment, isolation, identification and confirmation of Vibrio species relevant to food safety.
Key Topics
- Scope and applicability: Detection in foodstuffs, animal feed and environmental samples in the food chain.
- Principle of the method: Sequential primary and secondary selective enrichments, followed by isolation on selective agar and presumptive tests, then confirmation by biochemical tests and molecular methods.
- Culture media and reagents: Includes guidance for enrichment media (e.g., alkaline saline peptone water/ASPW) and selective isolation media (e.g., TCBS and additional selective plates), saline nutrient agar and reagents for oxidase and biochemical assays.
- Identification and confirmation: Presumptive colony selection, biochemical confirmation tests and PCR (conventional and real-time) options for definitive detection of V. parahaemolyticus, V. cholerae and V. vulnificus.
- Performance characteristics: Interlaboratory study results, sensitivity, specificity and limits of detection (LOD) are addressed to support method validation.
- Documentation: Test reporting, sample preparation and quality controls (positive/negative controls) are included.
Applications
- Routine food safety testing of seafood, ready-to-eat products and other high-risk foods for Vibrio contamination.
- Environmental monitoring in aquaculture, processing plants and food handling environments.
- Outbreak investigation and confirmation of enteropathogenic Vibrio spp. in clinical/public health laboratories working with foodborne illness cases.
- Regulatory compliance testing by food producers and official control laboratories.
Who should use this standard
- Food microbiology laboratories and analysts
- Public health and reference laboratories
- Seafood and food processors implementing HACCP and supplier testing
- Regulatory agencies and accreditation bodies
Related standards
- Other ISO/CEN horizontal methods for food microbiology (sample preparation and method validation) and molecular detection protocols. Refer to national adoption texts (EN ISO 21872-1:2017) for regional implementation details.
EN ISO 21872-1:2017 offers a practical, internationally recognized approach for reliable detection of pathogenic Vibrio spp., supporting food safety, regulatory compliance and public health surveillance.
