importance of microbiological assay

4. Microbiological Assay of Antibiotics •The microbiological assay of an antibiotic is based upon a comparison of the inhibition of growth of micro-organisms by measured concentrations of the antibiotics under examination with that produced by known concentration of a standard preparation of the antibiotic having a known activity. Three major types used for this purpose include chemical assays, radio isotopic methods and the use of micro electrodes. Injectable drugs, which are administered directly into the circulatory system, bypass a number of innate human immune defenses associated with the gastrointestinal system. This identification of the specific organism is possible by microbiological assays. 2. A pure (or axenic) culture is a population of cells or multicellular organisms … Within the field of microbiology, there are specific tests or assays utilized to quantitatively and qualitatively measure microorganism components. Hence they are called natural pesticides. Microbiological assay 1. The test preparation behaves as though it were simply a dilution of the standard preparation in a diluent that is completely inert in respect of the response used. covertly interfere with the assay of antibiotics Importance and Usefulness The actual inhibition of the observed microbial growth under stringent standardized experimental parameters may be judiciously utilized and adequately exploited for demonstrating as well … Microbial cultures are foundational and basic diagnostic methods used extensively as a research tool in molecular biology. The microbiological assay for antibiotics dates back to the demonstration of the lysozyme activity in an agar diffusion assay by Fleming, shortly followed by the agar diffusion assay for penicillin devised by Heatley . Four case studies that demonstrate the importance of identifying the causative agents and the source of infection are discussed to illustrate the central importance of microbiological findings in the diagnosis of bacteremia and bloodstream infections associated with infections at other sites. The principle is that the organism is inoculated into a medium containing all the growth factors needed except the one under examination; the rate of growth is then proportional to the amount of this nutrient added in the test substance. Microbial contamination of parenteral products is one of the most serious issues currently facing the pharmaceutical industry. • Many therapeutic agents, which either inhibit the growth of microorganisms (Antibiotics) or essential for their growth (vitamins and aminoacids) can be standardised by microbiological assays. These assays are often utilized to aid in bacterial identification. microbiological assay Method of measuring compounds such as vitamins and amino acids, using micro‐organisms. Importance of microbiology in agriculture: Natural Pesticides: Few microbes like bacteria and viruses are exploited against pests attacking farm crops. It is often essential to isolate a pure culture of microorganisms. Ever since, the main uses of agar diffusion assay were determination of potency of growth-inhibiting (i.e. Microbiological assays are called dilution assays. Microbial Assay Prepared by , Mr. Snehal Patel, Assistant Professor, Sumandeep Vidyapeeth, Vadodara, Gujarat, India. 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