ISO 16140-6:2019

Overview

ISO 16140-6:2019 is part of the internationally recognized ISO 16140 series, providing a detailed protocol for the validation of alternative (often proprietary) methods for microbiological confirmation and typing within the food chain. Published by ISO, this standard ensures that laboratories can robustly assess whether alternative confirmation and typing procedures for microorganisms are truly equivalent to established reference methods. The scope covers products for human consumption, animal feed, environmental samples in food/feed production, and materials from primary production.

The objective of ISO 16140-6 is to promote consistency, safety, and confidence in alternative testing methods, ensuring reliable identification and characterization of bacteria, fungi, and - in some cases - other microorganisms. This enhances food safety, supports regulatory compliance, and facilitates international trade.

Key Topics

ISO 16140-6:2019 addresses several important areas related to method validation in food microbiology:

• Validation Protocols: Details a two-stage process involving an initial method comparison study (in a single laboratory) and a multi-laboratory (interlaboratory) study.
• Reference vs. Alternative Methods: Outlines how alternative confirmation/typing methods must match or exceed the performance of ISO reference methods or other recognized standards (such as whole genome sequencing).
• Inclusivity and Exclusivity Studies: Requires in-depth evaluation of the method against both target microorganisms (inclusivity) and non-target microorganisms (exclusivity) for comprehensive reliability.
• Strain Selection: Provides guidance for the selection and characterization of microorganism strains (such as bacteria and fungi) ensuring diverse and representative panels for testing.
• Interpretation of Results: Specifies statistical and practical analysis of results, including thresholds for agreement and necessary follow-up investigations in case of discrepancies.
• Acceptance Criteria: Establishes minimum numbers of strains for testing at different taxonomic levels (family, genus, species, subtype, or serovar) to ensure statistical robustness.
• Scope of Application: Applies to products for human consumption, animal feed, environmental and primary production samples.

Applications

ISO 16140-6:2019 supports organizations and laboratories involved in:

• Food Safety Testing: Validation of rapid or alternative methods for confirming and typing pathogens or spoilage organisms in food and feed.
• Regulatory Compliance: Provides documented evidence of method performance to satisfy local and international food safety regulations and facilitate trade.
• Research and Development: Enables developers and manufacturers to validate innovative proprietary methods for microbiological analysis prior to commercialization or accreditation.
• Quality Assurance: Used by laboratories to conduct reliable in-house validation (especially when interlaboratory studies are not feasible), ensuring internal method consistency.
• Environmental Monitoring: Supports validation of methods used on samples from processing environments to track and manage microbial risks.

Validated alternative methods can be used to replace, either partly or fully, the confirmation procedures of established reference or previously validated alternative methods-provided validation aligns with the specific isolation media and protocols studied.

Related Standards

For comprehensive method validation and verification in food microbiology, ISO 16140-6:2019 is used alongside:

• ISO 16140-1:2016 - Vocabulary for method validation
• ISO 16140-2 - Protocol for the validation of alternative (proprietary) methods against a reference method
• ISO 16140-3 - Protocol for verification of validated reference/alternative methods in a single laboratory
• ISO 16140-4 - Method validation in a single laboratory
• ISO 16140-5 - Factorial interlaboratory validation for non-proprietary methods
• ISO 17468 - Rules for development and validation of standardized methods
• ISO 6579 - Reference methods for Salmonella detection and confirmation
• ISO 11133 - Cultivation and maintenance of microorganisms used in testing

Practical Value

Implementing ISO 16140-6:2019 improves confidence in microbiological confirmation and typing results, streamlines method introduction, and supports quality assurance in food safety laboratories. It benefits test kit manufacturers, reference laboratories, and routine testing facilities, ultimately enhancing public health and supporting regulatory and certification requirements globally.

Keywords: ISO 16140-6:2019, method validation, microbiology, food safety, alternative methods, confirmation procedures, typing procedures, laboratory accreditation, food chain, inclusivity, exclusivity, standardization, ISO standards.