Brucella ovis REO 198 natural and experimental infection in Santa Inês rams from Brazil

B. ovis pathogenicity was evaluated in experimentally inoculated and naturally infected rams. Ten animals were submitted to simultaneous conjunctival and intrapreputial inoculation with 2x109 CFU/ mL of B. ovis REO 198. After that, animals underwent physical examination and blood samples were collected for serology every week. Positive serology results started to be observed in the 3rd week, with fluctuations in titers. Clinical changes began in the 5th week after inoculation and were associated with positive serology in the acute phase of the disease. Presence of B. ovis in semen and urine culture was intermittent. Three non-inoculated animals showed natural infection. B. ovis was shed twice in semen of one serology-negative animal. The study underscored the pathogenic characteristics of B. ovis REO 198 in Santa Inês rams, as well as the importance of animals as potential sources of infection.

Inserción laboral e ingresos de los migrantes de países limítrofes y peruanos en el gran Buenos Aires

Incluye Bibliografía

Reinterpretación del fenómeno migratorio hacia la ciudad de Buenos Aires a mediados del siglo XIX

Incluye Bibliografía

Brucella ovis: InvasãO, tráfego, fatores de virulência e resposta imune

Brucellosis remains an economic problem in animals and public health. Worldwide ovine brucellosis caused by Brucella ovis is considered a major cause of infertility in sheep. The factors responsible for persistence of the agent are not known, as well as the mechanisms involved in immune defense and possibly the persistence of the agent. Brucella spp. induces moderate inflammatory response. The nature of the intracellular agent stimulates immune response of the type 1 helper T lymphocytes. Studies of the pathogenesis of ovine brucellosis are scarce. Recent developments have shown that the inflammatory response induced by moderate brucelas represent probably the result of an attempt to escape the immune response and suppression of host immune response. Were reviewed by the mechanisms described by brucelas and Brucella ovis for penetration into the host, escape of the immune response and the immune response generated by the infection.

Contexto institucional del sistema de colectivos de Buenos Aires

Incluye Bibliografía

Informe del Decimosegundo Período de Sesiones del Comité de Expertos Gubernamentales de Alto Nivel (CEGAN), Buenos Aires, 1 al 3 de diciembre de 1986 = Report of the Twelfth Session of the Committee of High-Level Government Experts (CEGAN), Buenos Aires, 1-3 December 1986

Presenta la organizacion de los trabajos, resumen de los debates y conclusiones de la reunion del CEGAN que se convoco a fin de servir de foco preparatorio para la Conferencia Extraordinaria de la CEPAL, celebrada en Mexico entre el 19 y el 23 de enero de 1987, y cuyo tema principal se refiere a estrategias y politicas nacionales e internacionales conducentes a la recuperacion y al desarrollo de los paises de la region.

Guía de investigaciones en curso de la Universidad de Buenos Aires y su tesauro

Incluye Bibliografía

Investigación sobre los efectos sociales de la urbanización en un área obrera del Gran Buenos Aires = Inquiry into the social effects of urbanization in a working-class sector of Greater Buenos Aires

Los documentos del Seminario fueron publicados por UNESCO en 1961 con el título: La urbanización en América Latina/Urbanization in Latin America

Provisión de vivienda en el área metropolitana de Buenos Aires

Incluye Bibliografía

Administración, control y gestión de la tierra urbana en el área metropolitana de Buenos Aires

Incluye Bibliografía

Antecedentes y propuestas para un plan de manejo de residuos peligrosos, con énfasis en los tóxicos, para el área metropolitana de Buenos Aires

Incluye Bibliografía

Factors related to the evolution of poverty in the Greater Buenos Aires, 1991-1997

Includes bibliography