Pectin-Agar Growth Medium for Mould Detection Amid Yeast
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Solution Overview
Problem
Existing methods for detecting filamentous fungi are challenged by the outcompeting growth of yeast, leading to underestimation of mould presence, particularly in environments with high yeast-to-mould ratios, as conventional media are not selective for mould.
Innovation Solution
A growth medium composition comprising pectin and agar as the sole carbohydrates, which selectively promotes mould growth over yeast, allowing for accurate detection of filamentous fungi even in the presence of yeast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional growth media (e.g., Malt Extract Agar) are used for detecting filamentous fungi, then general fungal growth is supported, but yeast outcompetes mould leading to underestimation of mould presence
Solution Approach 1:
The patent modifies the chemical composition parameters of the growth medium by using pectin and agar as sole carbohydrates instead of conventional media components. This parameter change creates selective pressure that allows mould to grow while inhibiting yeast, thereby resolving the contradiction between supporting fungal growth and preventing yeast outcompetition.
Solution Approach 2:
The patent applies local quality by creating a growth medium with specific localized properties (pectin and agar as sole carbon sources) that selectively favor mould growth. This local modification of medium composition at the detection site enables differential growth outcomes without affecting the overall detection methodology.
2Productivity
If non-selective media are used, then both yeast and mould can grow, but yeast overgrowth masks mould colonies making accurate counting impossible
Solution Approach 1:
By changing the carbohydrate source parameters to exclusively pectin and agar, the medium creates selective conditions where mould can be accurately counted even in the presence of yeast. This parameter modification enables both high productivity and measurement precision simultaneously.
3Ease of manufacture
If traditional agar-based media are used, then easy preparation and broad fungal support are achieved, but selectivity for mould over yeast is lacking
Solution Approach 1:
The patent maintains the ease of manufacture by using agar as a base but changes the carbohydrate source parameters to pectin and agar only. This selective parameter change provides both mould selectivity and maintains preparation simplicity, resolving the contradiction between ease of manufacture and adaptability.
Data Source
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AI summary
The invention pertains to a growth medium composition selective for filamentous fungi, its use in quality control and/or for detecting filamentous fungi in a sample, a method for detecting filamentous fungi in a sample and a kit-of-parts to prepare the growth medium composition.