ISO 11138-1:2017

Overview

ISO 11138-1:2017 - Sterilization of health care products: Biological indicators - Part 1: General requirements defines the basic, common requirements for biological indicators (BIs) used in the validation and routine monitoring of sterilization processes. The standard covers production, labelling, test methods and performance characteristics for inoculated carriers, suspensions and their components. It applies when no later part of ISO 11138 specifically addresses a particular sterilization process. Note: national or regional regulations can also apply. The document does not cover microbiological test systems for purely physical removal processes (e.g., filtration), though some elements may be relevant.

Key topics and requirements

• Manufacturing controls and quality systems: requirements for quality management, traceability, personnel and finished-product controls to ensure consistent BI production.
• Test organism and population: specifications for organism strain, originating inoculum, and nominal population (CFU) used in BIs.
• Performance characteristics: methods and criteria for determining BI resistance (e.g., D value and related survivor-kill response characteristics). Annexes describe D value determination methods (survivor curve and fraction-negative) and viable count procedures.
• BI formats and packaging: requirements for inoculated carriers, primary/secondary packaging, self-contained biological indicators and process challenge devices (PCDs).
• Labelling and information: mandatory data manufacturers must provide on BI labels for safe and traceable use.
• Storage, transport and stability: conditions to maintain BI viability and reliability during distribution and storage.
• Culture and incubation: validated culture conditions, growth media, incubation equipment, incubation times and software validation for automated detection systems.
• Test methods and annexes: normative annexes cover viable count, growth inhibition by carriers/packaging, D value methods and survival-kill response characteristics.

Practical applications and users

ISO 11138-1:2017 is used for:

• Sterilization validation and routine monitoring in hospitals, medical device manufacturing and contract sterilization facilities.
• Quality assurance (QA) and regulatory compliance by manufacturers of biological indicators and sterilization service providers.
• Microbiology laboratories performing BI population, resistance and incubation testing.
• Design and selection of process challenge devices (PCDs) and self-contained BIs for steam, EO, radiation and other sterilization processes (where covered by other ISO 11138 parts).

Keywords: ISO 11138-1:2017, biological indicators, sterilization validation, sterilization monitoring, D value, inoculated carriers, medical device sterilization, process challenge device.

Related standards

• ISO 11138 series (other parts for specific sterilization processes)
• ISO 11135, ISO 17665-1, ISO 14937 (sterilization process validation and control)
• ISO 11737-1 (microbiological methods for population determination)