This study presents age-associated pathologic findings in aging rats that had been maintained under similar well-controlled laboratory conditions. The aim of the study was to evaluate two rat strains and their F1, hybrid.

In Dutch Inserted Between P.212 and P.(213).

Describes the activities of one day, from dawn to dusk, in the life of a roadrunner living in the desert.

Recognition that aging is not the accumulation of disease, but rather comprises fundamental biological processes that are amenable to experimental study, is the basis for the recent growth of experimental biogerontology. As increasingly sophisticated studies provide greater understanding of what occurs in the aging brain and how these changes occur

Boorman's Pathology of the Rat: Reference and Atlas, Second Edition, continues its history as the most comprehensive pathology reference on rat strains for researchers across science and medicine using rat models in the laboratory. It offers readers an added emphasis on the Sprague-Dawley and Wistar rat strains that is consistent with current research across academia, government, and industry. In addition, the book provides standard diagnostic criteria, basic content on histology, histological changes that result from drug toxicity and neoplasm, pathology terminology, and four-color photographs from the NTP archive and database. With updated references and photographs, as well as coverage of all rat strains, this book is not only the standard in the field, but also an invaluable resource for toxicologists, biologists, and other scientists engaged in regulatory toxicology who must make the transition from pathology results to the promulgation of meaningful regulations. - Contains full, four color photographs from the NTP archive and database and coverage of all rat strains - Provides an organ-by-organ and system-by-system approach that presents standard diagnostic criteria and basic content on histology and histological changes - Includes comprehensive and detailed background incidence data - Presents detailed descriptive content regarding changes in rat models during research

Pathology of Laboratory Rodents and Rabbits has become a standard text for both veterinary pathologists and veterinarians in laboratory animal medicine. Newly recognized infectious diseases continue to emerge and molecular methods for studying infectious agents are becoming widely used for the classification of these and previously known pathogens. With the ongoing development and perfection of genetic engineering techniques, the use of genetically engineered mice in the research laboratory continues to grow exponentially. This new edition features updates throughout with increased emphasis on timely topics such as infectious diseases in genetically engineered mice. Diseases covered include viral infections, bacterial infections, parasitic diseases, nutritional and metabolic disorders, behavioral disorders, aging and degenerative disorders, environment-related disease, and neoplasms. Organized by species, coverage includes mice, rats, hamsters, gerbils, guinea pigs, and rabbits. Veterinary pathologists, laboratory animal veterinarians, and students will appreciate the concise organization and easily accessible information on key diagnostic features, differential diagnoses, and significance of diseases.