This text contains the Proceedings of the Federation of European Microbiological Societies Symposium held in Troia, Portugal, during 18-23 September 1988.

Virus Variability and Impact on Epidemiology and Control of Diseases E. Kurstak and A. Hossain I. INTRODUCTION An important number of virus infections and their epidemic developments demonstrate that ineffec tiveness of prevention measures is often due to the mutation rate and variability of viruses (Kurstak et al., 1984, 1987). The new human immunodeficiency retroviruses and old influenza viruses are only one among several examples of virus variation that prevent, or make very difficult. the production of reliable vaccines. It could be stated that the most important factor limiting the effectiveness of vaccines against virus infections is apparently virus variation. Not much is, how ever, known about the factors influencing and responsible for the dramatically diverse patterns of virus variability. II. MUTATION RATE AND VARIABILITY OF HUMAN AND ANIMAL VIRUSES Mutation is undoubtedly the primary source of variation, and several reports in the literature suggest that extreme variability of some viruses may be a consequence of an unusually high mutation rate (Holland et al., 1982; Domingo et al., 1985; Smith and Inglis, 1987). The mutation rate of a virus is defined as the probability that during a single replication of the virus genome a particular nucleotide position is altered through substitution, deletion, insertion. or recombination. Different techniques have been utilized to measure virus mutation rates, and these have been noted in the extent of application to different viruses."

Busy clinicians and health practitioners recognize the importance of speedy detection of pathogens to impede the further spread of infection, and to ensure their patients' rapid and complete recovery. This reader-friendly reference is a unique collection of the newest and most effective diagnostic techniques currently in use in clinical and research laboratories. Instructive commentary regarding the application of these often complex methods is provided. This essential text aids readers in selecting the most efficient method, finding the necessary resources, and avoiding the most common pitfalls in implementation.

In recent years, there has been a dramatic increase in grain-based fuel ethanol production in North America and around the world. Whether such production will result in a net energy gain or whether this is sustainable in the long term is under debate, but undoubtedly millions of tons of non-fermented residues are now produced annually for global trade in the form of distillers dried grains with solubles (DDGS). Consequently, in a short period of time a tremendous amount of research has been conducted to determine the suitability of ethanol coproducts for various end uses. Distillers Grains: Production, Properties and Utilization is the first book of its kind to provide in-depth, and up-to-date coverage of Historical and current status of the fuel ethanol industry in the U.S. Processing methods, scientific principles, and innovations for making fuel ethanol using grains as feedstock Physical and chemical properties of DDGS, assay methodologies for compositional analyses, and mycotoxin occurrence in DDGS Changes during processing (from grains to DDGS) and analysis of factors causing variations in compositional, nutritional, and physical values Various traditional, new, and emerging uses for DDGS (including feed for cattle, swine, poultry, fish, and other animals, feedstocks for cellulosic ethanol, biodiesel, and other bioenergy production, and substrates for food and industrial uses) Appealing to all who have an interest in fuel ethanol production, distillers grains, and their uses, this comprehensive reference sharpens the readers' understanding of distillers grains and will promote better utilization of ethanol coproducts. Animal and food scientists, feed and food technologists, ethanol plant managers and technicians, nutritionists, academic and governmental professionals, and college students will find the book most useful.

advanced metastatic disease of solid tumors, dictates that each tumor mass, indeed each individual metastasis, will have a unique antigen and cytokine environment and hence unique response to immune modu lation. A differential response to immunotherapy is thus inevitable. 4. Many of the human trials described are not randomized and report survival or response against historical controls. Most tumors described are immunogenic human tumors: renal cell cancer and melanoma are most common. In order to avoid the well-described inter-patient vari ation and rare incidence of spontaneous response among patient samples as well as selection bias and changes in practice over time, randomized trials are required. 5. Immunological treatment is unlike conventional chemotherapy in its endpoint. Most chemotherapeutic regimes require a complete response or a good partial response for cure or good palliation. There are now many cases where immunotherapy has provided long-term palliation without massive tumor reduction. Immunity may be stimulated to a degree which holds tumorigenicity in check and most importantly, pro vides good palliation for the patient in a manner that differs essentially from chemotherapy."

Success in meeting the challenge to produce the commercial products anticipated by the exploitation of biological processes depends upon provid ing effective separation protocols. Effectiveness can be measured in terms of selectivity, purity, resolution and validatory success. The major processing problems are associated with either the selective recovery of molecules which are present in low concentrations from complex mixtures or the selective removal of contaminants from the desired molecule. Central to the evolution of processes satisfying this demand are the regulatory requirements being imposed by governments on the purity of a product, especially in the health care market. Synthetic organic chemists are increasingly finding it advantageous to conduct one or more steps using either enzymic biotransformations where molecules with a single and consistent stereochemistry or chirality are required. The underlying princi ples behind the methods, techniques and processes currently being used and developed commercially rely upon the biospecific nature and properties of the desired molecule. When these factors are married to the more traditional techniques of precipitation, chromatography, liquid-liquid extraction and membrane processes, powerful tools emerge, allowing highly selective separations to be designed. The logical extension of these combinations is to apply genetic engineering techniques to influence the separations at a more fundamental and structural level by modifying the target protein at source, during its synthesis, to facilitate its separation in a given, selective manner, leading to the distinct possibility of producing 'designer' separation programmes."

People have relied on medicinal products derived from natural sources for millennia, and animals have long been an important part of that repertoire; nearly all cultures, from ancient times to the present, have used animals as a source of medicine. Ingredients derived from wild animals are not only widely used in traditional remedies, but are also increasingly valued as raw materials in the preparation of modern medicines. Regrettably, the unsustainable use of plants and animals in traditional medicine is recognized as a threat to wildlife conservation, as a result of which discussions concerning the links between traditional medicine and biodiversity are becoming increasingly imperative, particularly in view of the fact that folk medicine is the primary source of health care for 80% of the world's population. This book discusses the role of animals in traditional folk medicine and its meaning for wildlife conservation. We hope to further stimulate further discussions about the use of biodiversity and its implications for wildlife conservation strategies.

This is the only English-language publication devoted exclusively to extensive reviews and synthesis of topics on the biology of birds. The current volume includes articles on sibling competition, predation and the limitation of bird numbers, and population trends in birds of eastern North America.

Mapping of animal genomes has generated huge databases and several new concepts and strategies, which are useful to elucidate origin, evolution and phylogeny. Genetic and physical maps of genomes further provide precise details on chromosomal location, function, expression and regulation of academically and economically important genes. The series "Genome Mapping and Genomics in Animals" provides comprehensive and up-to-date reviews on genomic research on a large variety of selected animal systems, contributed by leading scientists from around the world.

Insects and other arthropods, the largest group of animals in number of species, have global impact on agriculture, industry, human health and environment. They are of particular economic importance for food production as pollinators, for natural products like silk and also as pests and parasites. Arthropods covered in this volume include honeybee, bumblebee, the parasitic Jewel Wasp, silkworm, pea aphid, mosquito, Hessian fly and tick.

A description of a microbial colony grown on suitable agar usually involves the observation of its immediate surroundings. This applies to most bacteria and fungi and is of considerable taxonomic importance. This book discusses the more abundant pigments of microbial origin, their unique function in microbial life and their biotechnological significance.

'Living in Corfu was rather like living in one of the more flamboyant and slapstick comic operas’

It is 1935 and the Durrells have escaped the leaden summer skies of Bournemouth to arrive ‘like a troupe of medieval tumblers’ on the sun-drenched island of Corfu for a new life. Gerald Durrell’s beloved portrayal of his chaotic family – beatific Mother, Roger the dog, diet-obsessed Margo, book-loving Lawrence and gun-wielding Leslie – as well as his own adventures with a burgeoning menagerie of beasts, birds and insects (including an owl called Ulysses), is a timeless account of an idyllic childhood and an uproarious portrait of the English abroad.

'Any writer who can evoke the existential sadness of a lonely cockroach, or make krill thrilling, or describe a snorkelling colleague being engulfed in a "gargantuan cetacean bum detonation" is a real gift to science communication ... thought-provoking' Guardian Everything you ever wanted to know about how animals live together, and what that means for us Some animal societies hold a mirror up to the human world: elephants hold funerals for departed family members. Pinyon jays run collective creches. Rats will go out of their way to help a cold, wet stranger. Other lifestyles can seem intensely alien. Take locusts, surging over the land in their millions, unable to slow down for a moment because the hungry ranks behind will literally bite their legs off if they don't stay one step ahead (actually, you might know a few people like that). But no matter how offputting an animal might be, behavioural scientist Ashley Ward can usually find something worth celebrating. Travelling the world from the Serengeti to the frozen Antarctic ocean, with stops in the muddy fields and streams of his native northern Yorkshire, he brings his curious eye and infectious humour right down to their level. The result is a world-expanding, myth-busting tour of some of nature's greatest marvels, in delightfully broad-minded company.

Filarial nematodes constitute and important group of human pathogens in tropical regions of the world. Diseases associated with these worms are generally separated into two categories: filariasis, caused by infections of lymphatic dwelling parasites and onchocerciasis, or river blindness, caused by infections of Onchocerca volvulus. Other filariae specifically infect humans and it is likely that zoonotic filarial infections may alter the outcome of infections with human parasites. The chapters in this book will cover concepts that, in most instances, overlap all of these parasites as well as focus on new and emerging ideas. The Filaria, volume five of World Class Parasites, is written for researchers, students and scholars who enjoy reading research that has a major impact on human health, or agricultural productivity, and against which we have no satisfactory defense. It is intended to supplement more formal texts that cover taxonomy, life cycles, morphology, vector distribution, symptoms and treatment. It integrates vector, pathogen and host biology and celebrates the diversity of approach that comprises modern parasitological research.

This volume of the series Handbook of Zoology deals with the anatomy of the gastrointestinal digestive tract - stomach, small intestine, caecum and colon - in all eutherian orders and suborders. It presents compilations of anatomical studies, as well as an extensive list of references, which makes widely dispersed literature accessible. Introductory sections to orders and suborders give notice to biology, taxonomy, biogeography and food of the respective taxon. It is a characteristic of this book that different sections of the post-oesophageal tract are discussed separately from each other. Informations on form and function of organs of digestion in eutherians are discussed under comparative-anatomical aspects. The variability and diversity of anatomical structures represents the basis of functional differentiations.

Cell surface membranes contain a range of types of molecule of which proteins form a significant part, and which play important roles in regulating cellular activities, such as growth and differentiation. In recent years considerable advances have been made in the understanding of the structure and function of cell surface molecules, partly stimulated by the development of recombinant DNA technologies. This book provides a review of current knowledge of the molecular biology of the cell surface with particular emphasis on cell differentiation, relating the molecular properties of the cell surface to developmental biology. In addition to the central theme of cell differentiation, cell surface markers, which are useful in monitoring differentiation and cell adhesion molecules, which influence differentiation, are covered. The book opens with two introductory chapters which provide the background information necessary to familiarize the reader with the current status of developmental biology and molecular studies of the cell surface, and includes coverage of the early embryogenesis of the mouse, teracellular matrix, the major histocompatibility complex, the immunoglobulin superfamily, growth factors, integerins, cadherins, cell-surface carbohydrates and nuclear-cell-surface interactions.

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