Emphasized throughout this book is the idea that in vitro work has often thrown light upon an in vivo process or has indicated a new direction for in vivo study. It must be noted, however, that an in vitro situation is an artificial environment and care must be used in relating all such findings to the actual host-parasite relationship. In our age of molecular and submolecular microbiology, thi...

P. H. M. SAVELKOUL,* H. J. M. AARTS, J. DE HAAS, L. DIJKSHOORN, B. DUIM, M. OTSEN, J. L. W. RADEMAKER, L. SCHOULS, AND J. A. LENSTRA Department of Medical Microbiology and Infection Control, University Hospital Vrije Universiteit, Amsterdam, DLO-State Institute of Quality Control of Agricultural Products Centre De Born, Wageningen, Novartis Seeds bv, Section Biotechnology, Enkhuizen, Department...

1 Laboratory of food microbiology, Institut Pasteur du Maroc, Casablanca, Morocco 2 Division of Pharmacy and Veterinary Inputs, Control and Expertise Department, ONSSA, Rabat, Morocco 3 Laboratory of Chemistry and Biology Applied to the Environment, Department of Biology, Faculty of Sciences, The University of Moulay Ismail, Meknès, Morocco 4 Laboratory of Cellular and Molecular Biology, Depart...

1 Departamento de Biologia Celular, Universidade de Brası́lia (UnB), Brası́lia, Brazil, 2 Departamento de Biologia Celular e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Natal, Brazil, 3 Centro de Microbiologı́a y Biologı́a Celular, Instituto Venezolano de Investigaciones Cientı́ficas (IVIC), Caracas, Venezuela, 4 Departamento de Microbiologia e Imunologia, Universidade Estadual Pau...

IMPORTANT POINTS The following key points are discussed: • Quality control microbiology tests require controlled levels of inocula and require fresh preparations of cells for those inocula • The concentration of cells in a suspension can be estimated by optical density, but this must be confirmed by plate count • The optical density readings against cell mass are specific to the microorganism s...

There are significant challenges associated with qualitative and quantitative nucleic acid tests performed in diagnostic laboratories. The development of internationally available certified reference materials which can be traced to reference measurements will contribute to a better understanding of the performance characteristics of nucleic acid tests and enhance reliability and comparability ...

there are significant challenges associated with qualitative and quantitative nucleic acid tests performed in diagnostic laboratories. the development of internationally available certified reference materials which can be traced to reference measurements will contribute to a better understanding of the performance characteristics of nucleic acid tests and enhance reliability and comparability ...

pathology laboratory. The chapter is well written and most of the pitfalls encountered by beginners in this procedure are discussed in detail. Part 3 describes 18 examples of preparing various tissues, bacteria, etc., for microscopic examination, using the staining methods outlined in Chapter 7. Numerous photomicrographs illustrate the desired results. Part 4, a new addition, lists specific sou...