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Microbiology - Articles and news items
Issue 2 2014, Microbiology / RMMs / 15 April 2014 / Joshua Boateng and Harshavardhan Pawar, Department of Pharmaceutical Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich
Antimicrobial drugs form a significant aspect of disease therapy and are a major means of treating bacterial, fungal and viral infections. The issue of antimicrobial therapy is of current interest and clinical concern. This is mainly due to two key reasons; (i) persistent emergence of microbial resistant strains and (ii) the significant reduction in the rate of successful discovery new generations of more potent antibiotics to combat this resistance epidemic (especially in bacteria).
Any pharmaceutical product, whether manufactured in the hospital or industrial environment, has the potential to be contaminated with microorganisms. With sterile products, any microbial contamination presents an unacceptable risk; with non-sterile products, the implication of the contamination is dependent upon whether the microorganism can be considered ‘objectionable’, and then to the extent that it can cause patient harm (and here a risk assessment is ordinarily required).
Invasive fungal infections associated with high mortality rates are common in hospital settings, especially in intensive care units where patients may be immune-compromised, subject to invasive procedures and treated aggressively with antibiotics. The most common nosocomial fungal infections in descending order are due to the genera Candida, Aspergillus, Rhizopus, Fusarium and other less frequently isolated moulds. Usually the fungi are passed on from the hands of medical personnel, the indigenous microflora of the patient or the general hospital environment but occasionally pharmaceutical drug products and medical devices are implicated…
Issue 5 2013, Microbiology / RMMs / 22 October 2013 / Michael J. Miller, President, Microbiology Consultants, LLC and Suzan Mohammed Ragheb, Department of Biotechnology, The Nile Company for Pharmaceuticals and Chemical Industries
Rapid microbiological methods (RMM) have gained popularity and acceptance within a number of industry sectors, including food and beverages, diagnostics, environmental, personal care and pharmaceuticals. In recent years, many firms have successfully validated and implemented RMMs for a wide variety of applications. However, many geographic areas around the world still have not benefited from the advantages that RMMs afford, most notably the time to result for critical microbiological analyses. This is particularly true for clinical diagnostics and the detection of foodborne pathogens in developing countries.
The Encyclopedia of Rapid Microbiological Methods: The new fourth volume discusses technologies, regulatory acceptance and validation case studies
This is the second paper in our continuing series on Rapid Microbiological Methods (RMM) that will appear in European Pharmaceutical Review during 2013. As the editor for the Encyclopedia of Rapid Microbiological Methods, I provide a summary of the latest volume, which was published earlier this year. New case studies, regulatory guidance and novel technologies are highlighted, and encourage our industry to adopt new ways of performing microbiology assays across a wide range of applications.
For sterile as well as nonsterile pharmaceutical products, manufacturers must eliminate or minimise potential risks to patients as well as product quality. While many contributing factors may affect the quality of a medicine or its ingredients, microbial contamination control and proper sterilisation methods are critical considerations for the manufacturer throughout the product’s life cycle.
Hot topics in rapid methods: revisions to validation guidance and real-time environmental monitoring
This is the sixth and final paper in our continuing series on Rapid Microbiological Methods (RMM) that have appeared in European Pharmaceutical Review during 2012. As many of you already know, I am keen on staying on top of recent developments in the world of rapid methods, and have used my own blog (http://blog.rapidmicromethods.com) to communicate technology advances and changes to regulatory and validation practices and expectations. In my final article of the year, I am providing an overview of two very interesting topics that have sparked additional discussions within the professional community: the proposed changes to USP’s informational chapter on the validation of alternative microbiological methods and real-time environmental monitoring.
Revision to USP Chapter <1223>: Method validation is the process used to confirm that an analytical procedure employed for a specific test is reliable, reproducible and suitable for its intended purpose. All analytical methods need to be validated prior to their introduction into routine use, and this is especially true for novel technology platforms such as RMMs.
Because many RMM technologies consist of a combination of instrumentation, software, consumables and reagents, in addition to specific detection, quantitative or identification methodologies, it is important to develop a comprehensive and holistic approach to the validation process to ensure that the entire RMM system is suitable for its intended use.
This is the fifth paper in our continuing series on Rapid Microbiological Methods (RMM) that will appear in European Pharmaceutical Review during 2012. As many of you know, I am always on the lookout for the next generation of rapid microbiological method (RMM) technologies and solutions. In this article, I have invited Noe Miyashita, a researcher from Hitachi Plant Technologies, to describe a novel ATP bioluminescence technology platform that she and her colleagues are currently working on. But in order to frame this discussion, it is appropriate to provide some background material on the fundamental basics of ATP bioluminescent methods.
ATP bioluminescence is the generation of light by a biological process, and is most recognised in the tails of the American firefly Photinus pyralis. First discovered in 1947 by William McElroy, he described the ATP bioluminescence reaction in which ATP (Adenosine Triphosphate) is enzymatically consumed to produce light. Specifically, in the presence of the substrate luciferin, the enzyme luciferase will use the energy from ATP to oxidise luciferin and release photons (light at a wavelength of 562 nanometres). The photons can then be detected and measured by a luminometer equipped with a photomultiplier tube. Figure 1 provides an illustration of this chemical reaction.
Supplements / 24 September 2012 / Dr. Michael J. Miller
How the acceptance of rapid microbiological methods (RMMs) continues to be hampered by misconceptions, misunderstandings and myths.
Rapid micro methods and EMA’s post approval change management protocol.
Rapid sterility testing and the impact of recent changes to the US Code of Federal Regulations.
This is the fourth paper in our continuing series on Rapid Microbiological Methods (RMM) that will appear in European Pharmaceutical Review during 2012. Over the past few years, a number of professional meetings have focused on strategies and case studies for the validation and application of rapid microbiological methods (RMM). If you were able to attend one of these meetings, you probably found it encouraging and worthwhile listening to and speaking with end-users, regulators and vendors of the technologies. This year and next are no exception; scheduled conferences and training sessions within Europe and the US will provide the industry with a comprehensive overview and guidance on how to successfully implement RMMs. To give you a feel for what’s in store, this edition of our RMM series will highlight upcoming PDA and ECA RMM sessions. In addition, the last section will provide more information about the overall October 2012 PDA Global Conference on Pharmaceutical Microbiology, of which a number of RMM presentations will be delivered.
European Compliance Academy (ECA) Annual RMM Conference (December 2012):
This two-day conference offers you a unique opportunity to evaluate the new developments in RMM systems, to extend the current experi – ences in validation, as well as implementation of these systems within the pharmaceutical industry. Attendees will also learn about the expectations of the regulatory authorities and new developments with regard to regulatory requirements.
Videos / 18 April 2012 / Freddy White, European Pharmaceutical Review
Yvonne Boss, European In-Vitro Specialist Sales Manager at Charles River Laboratories speaks to Freddy White, Director of the European Pharmaceutical Review at analytica 2012.
This is the first of many articles in our continuing series on Rapid Microbiological Methods that will appear in European Pharmaceutical Review during 2012. For the past two years, I have enjoyed sharing with you a broad range of topics associated with the validation and implementation of rapid microbiological methods (RMMs), including:
- A review of the history of conventional micro – biology and the benefits of using RMMs
- Validation strategies
- Perspectives from the regulatory authori – ties, including FDA and EMA
- Overviews of currently available tech – nologies, including those based on the growth of microorganisms, detection of cellular targets, optical spectroscopy, nucleic acid amplification and gene sequencing, viability staining and laser excitation, as well as micro-electro-mechanical systems, or MEMS.
In addition to my articles, numerous companies have published their success stories of RMM selection, validation and implementation, for a variety of applications including, but not limited to, sterility testing, bioburden analyses, water testing, environmental monitoring and the detection of Mycoplasma and other micro – organisms.
ABB Analytical Measurement Analytik Jena AG Azbil BioVigilant, Inc. B&W Tek, Inc. bioMérieux BMG LABTECH GmbH Bruker Daltonik GmbH CAMO Software AS CI Precision Dow Chemical Company Ltd EUROGENTEC FOSS NIRSystems, Inc. GE Analytical Instruments IDBS IONICON Analytik GmbH LI-COR Biosciences Natoli Engineering Company, Inc. Pall Life Sciences PhyNexus, Inc. ReAgent Sirius Analytical Instruments Ltd Vala Sciences Veltek Associates Inc. Waters Corporation