Analysis of antimicrobial activity

Antimicrobial activity analysis assesses a product's ability to inhibit the growth or destroy microorganisms such as bacteria, yeasts, or molds. It is essential for validating the efficacy of technical products, active ingredients, plant extracts, or formulations intended for nutraceutical, cosmetic, textile, or industrial applications.

This analysis is a key step in ensuring the performance, safety of use and regulatory compliance of products claiming antimicrobial action.

Microbiological issues and principles

The antimicrobial activity of a product can result from an inhibitory (bacteriostatic) or destructive (bactericidal) mechanism. The objective of the analysis is to quantify this effect, measure its intensity, and define its spectrum of action. Manufacturers use these results to validate a functional claim, compare several formulations, select active ingredients, or evaluate the stability of the effect over time. In nutraceuticals, the analysis also allows for the characterization of natural extracts with traditional or scientifically documented antimicrobial properties.

What methods are used for analyzing antimicrobial activity?

Several methods are used to measure antimicrobial activity, depending on the nature of the product and the type of effect desired. Diffusion on agar involves applying the product or extract to an agar plate inoculated with a target microorganism; the resulting zone of inhibition reflects the antimicrobial efficacy. Suspension tests measure, in a liquid medium, the reduction of the microbial load after contact with the product. These methods can be performed according to recognized international standards, notably ASTM and ISO, guaranteeing the reliability and reproducibility of the results.

Some tests may include determining the minimum inhibitory concentration (MIC) or the minimum bactericidal concentration (MBC), allowing for the establishment of precise efficacy thresholds. Additional analyses, such as antimicrobial kinetic studies, may also be performed to characterize the product's behavior under different conditions.

Matrices and industrial applications

Antimicrobial activity analysis applies to a wide range of matrices: plant extracts, essential oils, active ingredients, functional powders, hydroalcoholic gels, technical solutions, antimicrobial textiles, treated surfaces, and materials designed to reduce contamination. It is used in the development of innovative products, the validation of protective or stabilizing formulations, the evaluation of surface treatment performance, and the qualification of natural ingredients with antimicrobial properties.

In the case of textile products, these analyses allow for the evaluation of the effectiveness of a treatment applied to a fabric. For hydroalcoholic formulations, they confirm compliance with efficacy requirements. For plant extracts, they help to document natural antimicrobial potential in nutraceutical or cosmetic applications.

Additional analyses

For a comprehensive evaluation of the performance and microbiological safety of your products, antimicrobial activity analysis can be combined with other analyses available in our catalog: MIC/MIC assaysto determine precise efficacy thresholds, challenge testing to assess a formulation's resistance to simulated contamination (ISO 11930), and antioxidant assays to characterize the functional properties of plant extracts. These analyses provide a holistic view of the quality, stability, and compliance of your products.

Perform your antimicrobial activity analysis with YesWeLab

YesWeLab collaborates with a specialized network of applied microbiology laboratories, selected for their expertise and compliance with ISO 17025 and COFRAC standards. We support manufacturers in defining the most appropriate protocol based on the matrix, the test objective, and regulatory requirements.

Thanks to our digital platform, you can easily centralize your analysis requests, track your samples, view your results, and communicate with our scientific team. You also benefit from access to a catalog of over 10,000 analyses and personalized scientific support throughout your project.

Since 2020, many manufacturers, formulators and research offices have trusted us to evaluate and validate the antimicrobial efficacy of their products.

To learn more or to submit a specific need, contact our team now.