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12 - Number of location and measurement for a reliable microbiological air testing
The people involved in a daily microbiology air sampling activity know quite well the frequent difficulties to obtain reliable results even in the same closed environment where the conditions are constant. The reasons are several: uneven distribution of micro-organisms in the air, inconstant biological activity of micro-organisms, influence of operator, air sampler, media, etc. The goal is to obtain results that are comparable with the previous data.
Learn more6 - Sampling Plan
The air sampling plan in check-list format aids both the operator’s supervisor and the operator in remembering all the points required for correct microbiological air sampling.
Learn more1 - Principle of microbial air sampler by impact method on agar plate
Air containing microbe-carrying particles is aspirated and accelerate through a hole and direct towards a nutrient agar surface of a plate. As the air turns away from the agar surface, the microbe-carrying particles that cannot follow the flow are impacted. The plate containing nutrient agar is then incubate at a suitable time and temperature, and the resulting Colony Forming Units (CFU) are counted to evaluate the number of microbe-containing particles collected from a specific volume of air.
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