Theory and Application of Microbiological Assay first presents an overview of microbiological assay, including general principles, basic techniques, capabilities, and limitations. This book also explains when to use a certain microbiological assay for specific analysis, citing examples to further clarify the matter. Some chapters discuss the test organisms and solutions, wherein test solutions are the final dilutions at a series of two or more concentrations that have been prepared from reference standard and unknown for application to the test system. Other chapters explore the various aspects of agar diffusion assays, tube assays, and diffusion assays. The book further looks into the quality control procedures, assay design and evaluation, and assay replication. This book will serve as an introduction to newcomers to the field and as a reference source for established workers in microbiological assay.