Microbiological Sampling of Surfaces

Abstract

SUMMARY This report summarizes the 4 basic methods for the microbiological sampling of surfaces. Whereas no single assay procedure can characterize completely the microbial elements on a surface, the rinse technique is probably the most accurate for enumerating viable micro‐organisms, and the direct surface agar plating technique is the best for enumerating particulates containing viable micro‐organisms. However, the convenience of other methods, such as the agar contact method, will often be the dominant factor in the selection of a sampling method.