Download or read book Persistence and Function of the Bursa of Fabricius microform a Primary Lymphoid Organ of the Chicken written by McConnachie, Peter Ross and published by National Library of Canada. This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Persistence and Function of the Bursa of Fabricius written by P. R. Mcconnachie and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Function of Bursa of Fabricius written by Sirpa Jalkanen and published by . This book was released on 1983 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Development and Function of the Bursa of Fabricius and Thymus in Chickens written by Richard Lee Aspinall and published by . This book was released on 1963 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Chicken Bursa of Fabricius as a Peripheral Lymphoid Organ written by Anita Naukkarinen and published by . This book was released on 1982 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Maturation and Site of the Peripheral Immune Function Associated with the Bursa of Fabricius in the Chicken written by Mikko Hippeläinen and published by . This book was released on 1988 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Primordia of the Lymphoid Organs of the Chicken written by Li-Tsun Chen and published by . This book was released on 1968 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thymus and the bursa of Fabricius are the first lymphoid organs of the chicken. They appear on the fifth day of incubation as proliferatios of endodermal epithelia. The bursa appears in the caudal half of the urodeal membrane. The bursa appears as a median chain of intercellular vesicles subjacent to the ectoderm and just within the endoderm. These vesicles enlarge and fuse to become the lumen of the bursa. The surrounding endodermal cells proliferate to form the lining of the bursa. The electron micrographs suggest that the urodeal ectoderm ingests extracorporeal fluid by pinocytosis and transfers it to the endoderm which releases it into the intercellular space to form the vesicles. The thymus appears as four separate proliferations. These arise from the dorsal, lateral extremes of Pharyngeal Pouches III and IV. Each of these proliferations lies just dorsad and mediad to the medial end of a small, transverse membrane connecting the pharyngeal pouch to the corresponding branchial groove. The dorsal part of Membrane III is a tube of ectoderm which intrudes mediad from Groove III and the ventral part is a tube of endoderm which protrudes laterad from the ventral part of Pouch III. The contact of ectoderm with endoderm is continuous from just beneath the body surface to a point just ventral and lateral to Thymus III. Membrane IV does not have a ventral, endodermal part. The contact of ectoderm with endoderm is restricted to the area just ventral and lateral to Thymus IV. There is no chain of vesicles and no indication of extracorporeal pinocytosis and internal secretion in Membranes III and IV. The urodeal membrane, and Membranes III and IV, contain the debris of many dead cells. The acid phosphatase activity of these membranes is high, which supports the morphological evidence for cell deterioration and cell death. The activity is high in (a) the urodeal ectoderm, the urodeal endoderm, and the lymphoid follicles of the bursa, and in (b) the ectoderm of Membranes III and IV, the endoderm of Membranes III and IV, and the endodermal epithelium of the developing thymus. The significance of this activity is unknown excepting its frequent association with cell deterioration and cell death, whether in the epithelia or at sites of active lymphopoiesis. The morphological indications of cell deterioration and cell death are particularly noticeable in the urodeal ectoderm and the branchial extoderm, and are remarkable in the ectoderm of the branchial groooves. Here, as in the thymus, the debris of epithelial cells is discharged into the surrounding mesenchyme where it is phagocytized. There is no indication that mesenchymal cells invade the epithelia. The extreme deterioration of the ectoderm is followed by rapid proliferation of the bursa and the thymus. Despite the intimate contact of ectoderm with endoderm it has not been possible to trace ectodermal cells into either organs.

Download or read book Canadiana written by and published by . This book was released on 1971 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Immunity Based Systems written by Yoshiteru Ishida and published by Springer Science & Business Media. This book was released on 2004-04-05 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: After I came to know Jerne's network theory on the immune system, I became fascinated with the immune system as an information system. The main pro totypes for biological information systems have been the neural systems and the brain. However, the immune system is not only an interesting informa tion system but it may provide a design paradigm for artificial information systems. With such a consideration, I initiated a project titled "autonomous decentralized recognition mechanism of the immune network and its applica tion to distributed information processing" in 1990 under a Grant-in-Aid for Scientific Research on a Priority Area ("Autonomous Distributed Systems") supported by the Ministry of Education, Science, and Culture. During the project, I promoted the idea that the immune system could be a prototype of autonomous distributed systems. After the project, we organized an international workshop on immunity based systems in 1996 in conjunction with the International Conference on Multi-Agent Systems held in Kyoto, Japan. Recently, there have been several international conferences related to topics inspired by the immune system and an increasing number of research papers related to the topic. In writing this book, a decade after the project, I still believe that the immune system can be a prototype, a compact but sophisticated system that nature has shown us for building artificial information systems in this network age of the twenty-first century.

Download or read book A History of Experimental Virology written by Alfred Grafe and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: By their powers of reason scientists will be able to extract from nature the answers to their questions. From: Critique of Pure Reason, 1781 Immanuel Kant (1724-1804), German Philosopher History is a composite of stories. The history of the biological disciplines has been written by all those who opened the gates of new knowledge by generating ideas and the experiments to support them. Previous authors have attempted various approaches to the history of virology, as is reflected in the numerous books and book-series issuing from the publishing houses. This volume is an attempt at a compre hensive yet compact survey of virology, which has meant penetrating the rigid limits of the separate disciplines of biology in which virologists have worked. Writing this history of experimental virology was really a search for the origins and for vital signposts to portray the wide scope of the knowledge attained thus far. This was done in com plete awareness of the fact that every presentation depends heavily upon the perspective of the observer, and of necessity communi cates only a part of the whole. The present scientific story hopes to recount the most important knowledge achieved during this past century - the first century of the exciting developments in virology.

Download or read book Veterinary Virology written by Frank J. Fenner and published by Academic Press. This book was released on 2014-06-28 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: Veterinary Virology deals with basic biomedical virology and the clinical discipline of infectious diseases. The book discusses the principles of virology as effecting future developments in the search for preventive and management of infectious diseases in animals, whether singly or as a whole herd or flock. Part I explains the principles of animal virology including the structure, composition, classification, nomenclature, cultivation, and assay of viruses. This part also discusses viral genetics, replication, and evolution (including mutation and genetic engineering). The book also reviews the pathogenesis of viruses, host resistance and susceptibility, as well as the mechanisms of persistent infections and tumor induction. Part II deals with viruses found in domestic animals; this part also explains in detail the properties, replication methods, pathogenesis, immunity, diagnosis, and control of some common viruses. The book discusses some other families of viruses of which no members are yet known as to have caused serious or important diseases in animals. Veterinarians, immunologists, virologists, molecular researchers, students, and academicians in the discipline of virology and cellular biology, as well as livestock owners will find this book helpful.

Download or read book Pediatric X ray Diagnosis written by John Caffey and published by . This book was released on 1972 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Poultry Diseases Influenced by Gastrointestinal Health written by Gino Lorenzoni and published by Nottingham University Press. This book was released on 2010-11-01 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a wealth of background knowledge on poultry anatomy, physiology, and immunology, this comprehensive reference explores poultry diseases that are directly related to or influenced by the gastrointestinal tract. Filled with useful images, this informative record discusses the impact of human pathogens harbored by poultry and offers alternatives to antibiotics in the treatment of intestinal disorders in poultry.

Download or read book Haemaphysalis Ticks of India written by G Geevarghese and published by Elsevier. This book was released on 2011-07-06 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This publication forms a part of the centenary year celebration of the Indian Council of Medical Research (ICMR), New Delhi."

Download or read book Identification of Pathogenic Fungi written by Colin K. Campbell and published by John Wiley & Sons. This book was released on 2013-01-25 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first edition of Identification of Pathogenic Fungi, there has been incredible progress in the diagnosis, treatment and prevention of fungal diseases: new methods of diagnosis have been introduced, and new antifungal agents have been licensed for use. However, these developments have been offset by the emergence of resistance to several classes of drugs, and an increase in infections caused by fungi with innate resistance to one or more classes. Identification of Pathogenic Fungi, Second Edition, assists in the identification of over 100 of the most significant organisms of medical importance. Each chapter is arranged so that the descriptions for similar organisms may be found on adjacent pages. Differential diagnosis details are given for each organism on the basis of both colonial appearance and microscopic characteristics for the organisms described. In this fully updated second edition, a new chapter on the identification of fungi in histopathological sections and smears has been added, while colour illustrations of cultures and microscopic structures have been included, and high quality, four colour digital images are incorporated throughout.

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1998 with total page 1960 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Dictionary of Virology written by Bozzano G Luisa and published by Elsevier. This book was released on 2001-08-22 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition of A Dictionary of Virology offers an authoritative, concise, and up-to-date list of all viruses affecting vertebrate species, from humans to fish. It has been completely revised since the 1997 edition to include 25% more entries, including many completely new viruses. The entries have been restructured so that all viruses are listed and classified in accordance with the standards set by the 7th Report of the ICTV. The extensive cross-referencing and illustrative tables further enhance the utility of this reference.