Microbiological sampling within a pharmaceutical manufacturing facility is performed via surface sampling, as well as passive and active aerosol (air) environmental sampling. Each of these methods produces a result based on the growth of microbial colonies on the surface of a collection media (typically agar), but the specific instruments and techniques vary between the methods.
In this application note from Particle Measuring Systems, learn more about how to make sure that sampling accurately reflects environmental microbiological conditions.