Mould Testing Precision: Is Your Environment as Clean as an Operating Theatre?

Mould Testing Precision: Is Your Environment as Clean as an Operating Theatre?


Is your living space as pure as an operating theatre? It may seem like an odd question, but when it comes to mould detection, the standards used in operating theatres offer unmatched sensitivity and accuracy. With's DIY Petri Plate Testing Kits, you can now bring this high level of environmental scrutiny into your home, office, or vehicle. Harness the same passive settling method trusted by medical facilities to ensure the air you breathe is free from harmful mould spores.

The Science Behind the Sensitivity:

Operating theatres require the utmost cleanliness to prevent post-surgical infections. Mould spores, invisible to the naked eye, pose a significant threat, not just in hospitals but also in our everyday environments. The passive air sampling method, highlighted for its utility in medical settings, relies on the natural settling of spores onto culture media. This approach is renowned for its sensitivity and specificity – qualities we've harnessed in our easy-to-use testing kits.

The Science Behind Passive Air Sampling: How It Works

Passive air sampling, also known as the sedimentation method, has long been employed in environments where sterility and air quality are non-negotiable, like pharmaceutical production areas and medical facilities. But what makes this method particularly interesting for your home or office? The simplicity and cost-effectiveness of passive sampling make it accessible for anyone concerned about mould exposure.

In practice, this method involves placing open Petri dishes filled with agar medium in the environment to be tested. These dishes are left exposed to the air, allowing mould spores to settle onto the agar naturally over a period. This method, while straightforward, draws from the stringent protocols used in settings where air purity is critical, such as operating theatres.

The process is rooted in the principle that mould spores, like those from the problematic Aspergillus genus, are present in the air around us. When they land on the nutrient-rich agar, they grow, providing visible evidence of the mould in the environment. After exposure, the plates are covered and incubated, typically at temperatures conducive to growing thermotolerant fungi, which are particularly concerning in health-compromised individuals. The most widespread variant, known as the 1/1/1 method, suggests placing the plates one meter above the ground and one meter away from walls or other obstacles for one hour​​.

The beauty of this approach lies in its adaptability and the Index of Microbial Air Contamination (IMA), which allows for a standardized interpretation of results. Depending on the level of contamination—classified into five IMA classes ranging from "very good" to "very poor"—different settings can evaluate their air quality and take necessary actions. The sedimentation method's applicability extends beyond healthcare, offering insights into the microbial landscape of any indoor environment, from homes to offices to vehicles.

Implementing Science at Home: Your DIY Mould Testing Kit

Leveraging this science, offers DIY Petri Plate Testing Kits, allowing you to employ this passive sampling method in your personal environments. Whether assessing your living room's air quality, checking for mould in the aftermath of water damage, or ensuring your workspace remains conducive to health, these kits equip you with the means to conduct professional-level assessments.

By following simple instructions, you can unveil the invisible threat of mould in your surroundings with the precision once reserved for the most sterile environments. Each kit comes with everything needed to conduct the test effectively and safely, mirroring the meticulous standards of pharmaceutical and medical settings.

When to Test: Unlocking the Mystery of Mould Presence:

According to recent research, certain situations necessitate more frequent mould assessments to maintain a healthy living environment:

Routine Checks: Ideally, conduct tests every six to twelve months to stay ahead of potential mould growth.
Post-Renovation: Newly completed construction or renovation work can disturb dormant spores.
After Construction: Building activities can introduce new sources of mould into your space.
Changes in Cleaning Protocols: Whenever you alter cleaning or HVAC system routines, reassess for mould.
Periods of Disuse: If a space hasn't been occupied for a while, check for mould before resuming regular use.
Exceeding Limit Values: If previous tests have shown high levels of spores, continuous monitoring is crucial.
Post-Surgery Infection: In healthcare settings, after a fungal infection post-surgery, assessing the surrounding environment is essential​​.

The Power in Your Hands: Using DIY Petri Plate Testing Kits:'s DIY kits empower you to conduct these crucial tests whenever needed. Simple to use, they allow the passive collection of air samples onto agar plates – the same method used in the most stringent medical environments. Whether you're checking your home's air quality, assessing a new office space, or ensuring your car is free from spores, our kits provide peace of mind with scientific precision.

Conclusion: Empowering Yourself Against Mould

Understanding the intricacies of passive air sampling illuminates why this method is not just for high-tech labs but is also invaluable for residential use.'s DIY Petri Plate Testing Kits provide you with the tools and techniques derived from operating theatre standards, enabling you to detect and address mould issues proactively.

Armed with knowledge and the right tools, you're not just reacting to mould; you're taking preventative steps to ensure your environment remains clean, safe, and healthy. So why wait? Take control of your indoor air quality today, and breathe easier tomorrow.

Join the Fight Against Mould: Share Your Story:

We're on a mission to improve indoor air quality, one space at a time. Have you used our Petri Plate Testing Kits in your environment? Your experiences could guide and inspire others on their journey to a healthier, mould-free space. Share your stories, results, and insights in the comments section below or on our social media channels. Together, we can build a community dedicated to clean, safe air.


Tomazin R, Matos T. Mycological Methods for Routine Air Sampling and Interpretation of Results in Operating Theaters. Diagnostics (Basel). 2024 Jan 29;14(3):288. doi: 10.3390/diagnostics14030288. PMID: 38337804; PMCID: PMC10855394.

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