This 406-page book explores the diseaseinducing potential of Epstein-Barr virus (EBV), its clinical features, and the pathogenesis of its associated diseases. The 19 chapters are well organized, of uniform quality throughout, and clearly written with consistent-albeit different-styles, because of its multiple authors. The opening chapter consists of an interesting description of the history of EBV, including major milestones and fascinating photographs of pioneering researchers. The 4 detailed chapters that follow are dedicated to (1) recent discoveries in terms of virology and molecular biology, with the description of EBVs structure, genome, replication, and latent and lytic infection; (2) its epidemiology, with data relating to both the prevalence and incidence of primary EBV infection and its related diseases; (3) its pathology, with descriptions of the histological characteristics of tissues involved in primary EBV infections and its related cancers and lymphoproliferative disorders; and (4) humoral and T cell immune responses during infectious mononucleosis and with EBV-associated tumors.Following these are chapters describing the typical and atypical clinical features of infectious mononucleosis, and acute complications in relation to involved organs, and its serologic and virologic diagnoses that depend on the different clinical manifestations of EBV infection. There is a broad survey of EBV-related neurological diseases, including encephalitis, aseptic meningitis, cranial nerve palsy, demyelinating polyneuropathy, psychosis, autonomic neuropathy, and primary CNS lymphoma. Clinical findings and serologic and molecular diagnostics of various disease manifestations in immunosuppressed populations (e.g., HIV-infected individuals and patients with post-transplant lymphoproliferative disease) are also thoroughly detailed. There is an up-to-date and critical examination of all EBV-related neoplasias, such as Burkitt lymphoma and Hodgkin and T cell lymphomas.The epidemiology, clinical findings, and diagnostic procedures of other diseases possibly related to EBV are discussed (e.g., nasopharyngeal carcinoma, leiomyosarcoma, and X-linked lymphoproliferative disorders), as is its potential role as a cause of rare manifestations of gastrointestinal tract, nervous system, lung, skin, genitourinary tract, kidney, eye, and autoimmune diseases. The last 2 chapters present current knowledge in terms of treatment strategies, including monoclonal antibodies and immune-based therapeutics, and the most recent vaccine strategies for the prevention of the entire spectrum of EBVrelated diseases.The reader will be fascinated by detailed scientific information derived from 14 decades of intensive research into the epidemiology, virology, molecular biology, immunopathogenesis, and pathology of EBV-related diseases. It will stimulate the reader to continue to ponder the many critical, unresolved, and unanswered questions regarding the behavior of EBV in the cell of its natural host, as well as how this interaction eventually causes...

In this work a mathematical model is obtained from a sample of 301 Casuarina equisetifolia Forst trees, which permits the determination of the average diameter crown from the normal diameter (d 1. 30). The measurements of 215 trees were used to perform the regression analysis and to validate the selected equation the corresponding measurements of 86 trees were taken. This study was done in the serpentinous savanna of Camagüey province plantations, located in Las Cuabas, Camagüey Silvicultural Unit belonging to Camagüey Forestry Integrated Enterprise. Three mathematical models were compared, being the linear model the most appropriate to perform the average crown diameter estimation. This model results in easy practical management.

RESUMENLos resultados obtenidos en este trabajo se presentan en forma de tablas elaboradas tomando como base los modelos matemáticos definidos a partir de las talas principales de bosques naturales de Pinus tropicalis Morelet mediante el empleo del análisis de regresión, para la cuantificación de la biomasa de copa (follaje y rama) de árboles en pie de la Empresa Forestal Integral Macurije, utilizando un muestreo completamente aleatorio por clases diamétricas. Se tomaron un total de 191 árboles que fueron talados, desramados y desfoliados, procediéndose al pesaje por separado, tanto de la biomasa foliar como de las ramas, de cada árbol, además de medir su diámetro a 1,3 metros del suelo y su longitud total. Palabras clave: biomasa de copa, estimación, modelo matemático ESTIMATION OF CROWN BIOMASS FOR STANDING TREES OF Pinus tropicalis MORELET IN THE FOREST INTEGRATED ENTERPRISE MACURIJE IN THE PINARDEL RÍO PROVINCE, CUBA. ABSTRACTResults offered in this paper are crowns weight tables (foliage and branches) contracted through equations derived from Pinus tropicalis Morelet natural forest using linear regression techniques. Data used were collected using a completely randomised design by diameter classes from 191 felled trees, cut the branches, strip off the leaves and weight them, one at a time. Besides, diameters at 1,3 meter above the ground level and total height were measured.

El trabajo se realizó en rodales naturales de Pinus caribaea var. caribaea, ubicados en la unidad silvícola San Andrés, La Palma, provincia Pinar del Río. El objetivo de la investigación fue evaluar la eficiencia y los daños causados a la cubierta vegetal del suelo durante la operación de arrastre de madera. Se evaluaron tres métodos: 1 - el arrastre de fustes enteros con yuntas de bueyes hasta los patios de carga; 2 - el arrastre de fustes enteros con tractor hasta los patios de carga; 3 - el arrastre de fustes enteros con yuntas de bueyes hasta las pistas de arrastre y con tractor hasta los patios de carga. El método de arrastre de madera que consistió en la combinación del empleo de animales y de tractor resultó más eficiente y provocó menos alteraciones a la cubierta vegetal del suelo.