Microbial Identification is the determination of the broad group (e.g., bacteria, yeast, or mold) or narrow group (e.g., genus and/or species) to which a microorganism belongs to.
Microbial characterization is the use of colony growth, cellular morphology, differential staining, and key diagnostic features to characterize a laboratory isolate for trending and investigative purposes without identification, example, nonpathogenic Staphylococci.
Microorganisms, if detected in drug substances, excipients, water for pharmaceutical use, the manufacturing environment, intermediates, and finished drug products, typically undergo characterization. This may include identification and strain typing, as appropriate.