This is a rather lengthy but simple analysis to determine the microbiological shelf life of bottled beer. Analysis is for the presence of contaminants that can grow in beer and their ability to spoil the bottled product.
Filtered beer
Testing for microbiological shelf life involves direct incubation of the untreated sealed sample as well as a visual inspection of the biological condition of a beverage (medium) and a final microscopic analysis in the event of positive visual findings.