ISO 6887-3-2017 PDF

Full title and description

Microbiology of the food chain — Preparation of test samples, initial suspension and decimal dilutions for microbiological examination — Part 3: Specific rules for the preparation of fish and fishery products. This international standard provides specific rules and procedures to prepare representative test portions, initial suspensions and decimal dilutions for microbiological examination of fish, shellfish and other fishery products when the general rules in ISO 6887‑1 require adaptation.

Abstract

ISO 6887-3:2017 specifies detailed sample preparation methods for raw, processed and frozen fish and fishery products to ensure reproducible and comparable microbiological results. It supplements ISO 6887‑1 by giving product-specific instructions (for whole fish, fillets, crustaceans, cephalopods, bivalve and gastropod molluscs, tunicates and echinoderms, and processed items such as smoked or cooked seafood). The document includes special procedures for sampling certain primary production items (e.g., raw molluscs) and excludes preparation steps already defined in method-specific standards (for example, virus detection methods).

General information

• Status: Published (confirmed on review; remains current).
• Publication date: 15 March 2017 (Edition 2).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 07.100.30 — Food microbiology.
• Edition / version: Edition 2 (2017); amended by Amendment 1 (2020) covering sample preparation for raw marine gastropods.
• Number of pages: 16 pages (main document) + 1 page for Amendment 1:2020.

Scope

Applies to the preparation of laboratory test portions, initial suspensions and decimal dilutions for microbiological examination of fish and fishery products when specific rules are needed beyond ISO 6887‑1. Covered product groups include raw fish (whole or fillets), crustaceans (whole or shelled), cephalopods, bivalve and gastropod molluscs, tunicates, echinoderms, smoked and cooked seafood, and frozen products. The standard is intended for hygiene and quality testing of muscle and other tissues where applicable. It does not replace sample-preparation requirements already specified in other method-specific standards (for example, standards for virus detection).

Key topics and requirements

• Integration with ISO 6887‑1: follow the general rules for test portion selection, dilution ratios and documentation; apply Part 3 only where product-specific variations are required.
• Product classification and sample selection: guidance on representative sampling for different taxa (fish, crustaceans, molluscs, tunicates, echinoderms) and minimum amounts for pooled small-species samples.
• Test portion and pooling considerations: use standard test-portion principles (e.g., commonly used 25 g/25 ml reference portion from ISO 6887‑1) and follow validation/verification procedures when using larger or pooled portions.
• Preparation techniques: recommended homogenization methods (stomacher, blender, grinding) and handling practices for delicate tissues, viscous or frozen matrices.
• Diluents and pH control: use appropriate diluents (buffered peptone water, MRD or other validated media) and address effects of low pH or high osmolarity where relevant.
• Special procedures for shellfish and primary production sampling: instructions for sampling raw bivalves, tunicates, echinoderms and, via Amendment 1:2020, raw marine gastropods.
• Temperature control and transport: minimize changes in microbial populations by controlling time and temperature between sampling and analysis (cold chain, rapid processing).
• Exclusions and cross-references: do not apply when another international standard or technical specification specifies preparation details (for example ISO/TS 15216 series for hepatitis A and norovirus).
• Traceability and documentation: record sample identity, origin, handling, portioning and dilution factors to support result interpretation and comparability between laboratories.

Typical use and users

Used by microbiology laboratories in the food industry, contract testing laboratories, regulatory and inspection bodies, research institutes and quality assurance teams. Typical applications include routine microbiological hygiene testing, batch release testing, outbreak investigation and method validation/verification for seafood products.

Related standards

ISO 6887-3 is part of the ISO 6887 series and is intended to be used with ISO 6887‑1 (general rules). Other related parts include ISO 6887‑2 (meat and meat products), ISO 6887‑4 and ISO 6887‑5/6 (other product categories and primary production sampling). Related microbiology standards and guidance include ISO 7218 (general requirements for microbiological examinations), the ISO 16140 series (method validation/verification), and method-specific documents such as ISO/TS 15216‑1 and ISO/TS 15216‑2 for virus detection in food.

Keywords

fish, fishery products, sample preparation, test portion, initial suspension, decimal dilutions, homogenization, shellfish, molluscs, gastropods, stomacher, buffered peptone water, food microbiology, ISO 6887

FAQ

Q: What is this standard?

A: ISO 6887-3:2017 is an international standard that gives product-specific rules for preparing test portions, initial suspensions and serial dilutions for microbiological examination of fish and fishery products.

Q: What does it cover?

A: It covers sample-selection and preparation procedures for raw, processed and frozen fish and seafood (including crustaceans, cephalopods, bivalve and gastropod molluscs, tunicates and echinoderms), recommended homogenization techniques, diluents and handling practices, plus special sampling guidance for certain primary-production products.

Q: Who typically uses it?

A: Food microbiology laboratories (industry and contract labs), regulatory authorities, auditors and researchers who perform routine hygiene or quality testing of seafood and need standardized, comparable sample-preparation procedures.

Q: Is it current or superseded?

A: The 2017 Edition (Edition 2) is the current published version; it was subsequently amended in 2020 to add specific guidance for raw marine gastropods. The standard is subject to periodic review.

Q: Is it part of a series?

A: Yes — it is Part 3 of the ISO 6887 series. Part 1 provides general rules and other parts (for example Part 2, Part 4, Part 5 and Part 6) provide rules for other product categories or sampling stages.

Q: What are the key keywords?

A: Key keywords include fish, fishery products, sample preparation, initial suspension, decimal dilutions, homogenization, shellfish, molluscs, stomacher, buffered peptone water, food microbiology.