ANSI AAMI ISO 11138-3:2017 pdf download – Sterilization of health care products – Biological indicators

03-12-2022 comment

ANSI AAMI ISO 11138-3:2017 pdf download – Sterilization of health care products – Biological indicators
1 Scope
This document specifies requirements for test organisms, suspensions, inoculated carriers, biological indicators and test methods intended for use in assessing the performance of sterilization processes employing moist heat as the sterilizing agent.
NOTE 1 Requirements for validation and control of moist heat sterilization processes are provided by the ISO 1 7665 series.
NOTE 2 National or regional regulations can provide requirements for work place safety.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11138-1 :201 7, Sterilization of health care products—Biological indicators—Part 1: General requirements
ISO 18472, Sterilization of health care products—Biological and chemical indicators—Test equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1 1 1 38-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at
— ISO Online browsing platform: available at
4 General requirements
The requirements of ISO 1 11 38-1 apply.
5 Test organism
5.1 The test organisms shall be spores of Geobacillus stearothermophilus or other strains of microorganism of demonstrated equivalent performance as required by this document.
NOTE 1 Bacillus stearothermophilus has been reclassified as Geobacillus stearothermophilus.
NOTE 2 Geobacillus stearothermophilus ATCC 7953 (NCTC 1 0007, DSM 22 and CIP 52.81 ),ATCC 1 2980 (equivalent to NRRL B-441 9) have been found to be suitable 1
[1 ][2] .
5.2 If a test organism other than Geobacillus stearothermophilus or Bacillus subtilis ATCC 35021 (5230) is used,the suitability of the resistance of that test organism shall be determined.
NOTE For processes at less than 1 21 °C, microorganisms such as Bacillus subtilis ATCC 35021 (5230) could be used, particularly in sterilization of heat-sensitive liquids.
6 Suspension
The requirements of ISO 1 11 38-1 apply.
7 Carrier and primary packaging
7.1 The suitability of the carrier and primary packaging materials for biological indicators for use in moist heat sterilization processes shall be demonstrated in accordance with the requirements of ISO 1 1 1 38-1 :201 7, 5.2 and Annex B.
7.2 The exposure conditions to determine compliance shall be
a) minimum exposure temperature: greater than or equal to 5 °C above the manufacturer’s stated maximum exposure temperature,
b) sterilizing agent: dry saturated steam; if the biological indicator is intended for use in a moist heat process not using dry saturated steam, e.g. an air/steam mixture, the appropriate air steam mixture should be used and noted as an exception to this document,
c) maximum exposure temperature: as stated by the manufacturer; if not stated by the manufacturer, a temperature of 1 40 °C shall be used, and
d) exposure time: greater than or equal to 30 min.
NOTE These conditions have been selected to represent a realistic challenge to the carrier while remaining within the practical limits of a moist heat sterilization process.

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