AOAC 966.04

Evaluation of Sporicidal Activity of Disinfectants

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Quick understanding of the test

AOAC 966.04 - Evaluation of Sporicidal Activity of Disinfectants

AOAC 966.04 evaluates the sporicidal activity of disinfectant products.

Application

Applicable to water-soluble powders and non-volatile liquid products intended for disinfection of hard surfaces.

Mandatory test strains

  • Test carriers are inoculated with spore suspensions and exposed to the test product for specific contact times.
  • Treated carriers are transferred to a recovery medium, followed by  incubation to  qualitatively assess growth.

Turnaround Time

The test typically requires 4-5 weeks for completion.
Results are qualitative, indicating the presence or absence of microbial growth post-disinfection.

Passing criteria

The absence of microbial growth after 21 days of incubation demonstrates the productโ€™s efficacy.

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Abstract

AOAC 966.04 provides a test method to evaluate the efficacy of water-soluble powders and non-volatile liquid products for their sporicidal action.

AOAC 966.04 serves as the standard testing guideline for the registration of disinfectants that claim to have sporicidal efficacy as per regulatory requirements set by the US Environmental Protection Agency (EPA) and the US Food and Drug Administration (FDA).

AOAC 966.04 Test Method

  • Peni cylinders and silk sutures are used as test surfaces (carriers) to perform the test.
  • Each carrier is individually inoculated with spore suspension of Bacillus subtilis and Clostridium sporogenes. For AOAC sporicidal tests, inoculum size should be adjusted between 1.0ร—105 to 1.0ร—106. spores/ carrier.
  • In the next step, carriers contaminated with test microorganisms are exposed to test products for specific contact times.
  • At the end of contact time, treated carriers are immediately transferred to a recovery medium enriched with neutralizing compounds.
  • Recovery medium is incubated for a period of 21 days. This incubation period allows for a comprehensive qualitative assessment of any potential growth that may still be present after disinfectant treatment. 

Importance of AOAC 966.04 Test

Clostridium difficile and Bacillus subtilis are considered one of the major contributors for spreading infections and disease outbreaks within hospital settings. Both bacteria can form endospores, allowing them to endure harsh conditions and persist for extended periods. As a part of robust hygiene practices, disinfectants possessing sporicidal action should be employed to effectively eliminate these endospore-forming microbes.

Disinfectants labeled with sporicidal claims are registered and approved by regulatory bodies like the U.S. Environmental Protection Agency (EPA) and the U.S. Food and Drug Administration (FDA). AOAC 966.04 method is designed for compliance reporting of sporicidal disinfectants under EPA and FDA regulatory authorities.

Conclusion

At MIS, we offer an extensive portfolio to test sporicidal efficacy of a diverse range of disinfectant products.

Our team comprises highly skilled microbiologists who possess in-depth knowledge and experience in AOAC testing analysis.

Under our AOAC testing portfolio, we also perform AOAC 965.12 test for tuberculocidal activity of disinfectants.

To get a quote on AOAC 966.04 testing, talk to our experts today.

Frequently Asked Questions

DR. Martinoz Scholtz

MIS Labs
1. What is AOAC 966.04 test?

AOAC 966.04 is a sporicidal activity test designed for evaluating efficacy of water-soluble powders and non-volatile liquid products. AOAC 966.04 is recommended by regulatory authorities FDA and EPA as part of the registration process of sporicidal disinfectants products.

2. What are the Products that can be tested with AOAC 966.04 test?

AOAC 966.04 test is applicable to water-soluble powders and non-volatile liquid products intended for disinfection of hard surfaces.



3. What is the Turnaround Time for AOAC 966.04 test?

 AOAC 966.04 test takes 4-5 weeks to complete.

4. On how many microbial strains can your AOAC 966.04 testing lab perform tests on?

We test for AOAC 966.04 using the following bacterial strains: Bacillus subtilis and Clostridium sporogenes.

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