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4.  Antimicrobial 

A 

# Antimicrobial

microbiology 

A substance that kills or inhibits the growth of microorganisms.

## Definition

Antimicrobial is a broad term describing any agent — chemical or physical — that acts against microorganisms such as bacteria, viruses, fungi or protozoa. It includes disinfectants, antiseptics, sanitisers and preservatives, each defined by where and how they are applied and the level of microbial reduction they achieve.

## Why it matters

Not all antimicrobial products are equivalent. Regulatory categories and efficacy claims determine whether a product is suitable for surface disinfection, skin antisepsis, food-contact sanitisation or water treatment.

## Practical applications

Used across healthcare, food safety, agriculture and consumer hygiene, with performance defined by standardised laboratory tests and use-specific claims.

## Related terms

[Adenosine Triphosphate (ATP)](/knowledge-center/glossary/adenosine-triphosphate)[Biofilm](/knowledge-center/glossary/biofilm)[Microbiological Testing](/knowledge-center/glossary/microbiological-testing)[Microorganism](/knowledge-center/glossary/microorganism)[Pathogen](/knowledge-center/glossary/pathogen)[Active Ingredient](/knowledge-center/glossary/active-ingredient)

## Referenced in

-   [When Is an Operating Theatre Safe to Reopen? A Guide to Terminal Cleaning and Environmental Verification](/knowledge-center/articles/guide-to-terminal-cleaning)
-   [What is Disinfection?](/knowledge-center/articles/what-is-disinfection)
-   [NaDCC vs Sodium Hypochlorite](/knowledge-center/articles/nadcc-vs-sodium-hypochlorite)
-   [What is NaDCC?](/knowledge-center/articles/what-is-nadcc)

## Need help applying this?

Our team can help design the right disinfection protocol for your operation.

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