SUMMARYNine isolates of infectious bronchitis (IB)-like viruses were made from 23 flocks (broilers or layers) in Chile experiencing the types of disease problems commonly associated with IBV. Their identity as IB viruses was confirmed. The histological changes they caused in tracheal organ cultures (OC) are described.Serum neutralisation tests performed in embryonated eggs (α-method) suggested that four of the isolates were serologically related to the Massachusetts (Mass) serotype of IBV and one to Connecticut. The four other strains were examined further by a serum neutralisation test in OC (ß-method). One was found to be of the Mass serotype but the others were found to be unrelated antigenically to a wide range of IBV serotypes isolated in many countries over a number of years. One of these three strains and the Mass strain, when given intranasally to 8-day-old specified pathogen free chickens together with pathogenic serotypes of E.coli, caused some mortality and considerable morbidity. The H120 vaccine strain was found not to protect completely against challenge with these four strains 21 days later.

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The recent development of the Colombian legislation, have been identified the need to develop protective clothing to work according to specifications from the work done and in compliance with international standards. These involve the development and design of new strategies and measures for work clothing design. In this study we analyzes the activities of the workers in the electrical sector, the method analyzes the risks activity data in various activities, that activities include power generation plants, local facilities, industrial facilities and maintenance of urban and rural networks. The analyses method is focused on ergonomic approach, risk analysis is done, we evaluate the role of security expert and we use a design algorithm developed for this purpose. The result of this study is the identification of constraints and variables that contribute to the development of a model of analysis that leads to the development the work protective clothes.

La torcaza (Columba araucana, Lesson), antiguamente una de las aves mis abundantes en 10s bosques meridionales del pais (5), presa comdn para 10s cazadores deportivos, hoy es amenazada por una serie de vias nosolbgicas previamente inexistentes.

Rev. salud pública. 14 sup (1) RESUMENEl fenómeno de la violencia organizacional es de gran amplitud y complejidad. Esto se debe a la multiplicidad de factores y de elementos de orden individual, económico, social y político que allí tienen lugar. Este trabajo aborda inicialmente el problema de la violencia en general para luego tratar de precisar el problema de la violencia en el trabajo. Hoy día este es un campo amplio de investigación. Sin embargo en Colombia aun resta hacer esfuerzos para comprender este fenómeno en un entorno de marcado por la violencia política y social, en el marco de las cuales se están sucediendo rápidas transformaciones en las formas de organización del trabajo. Nuestro método de trabajo está basado en la realización de entrevistas semi-directivas con trabajadores que han experimentado alguna forma de violencia en el trabajo. El análisis desarrollado permite identifi car algunos de los agentes precursores de violencia en las organizaciones y las formas de manifestación de estas tienen en el seno de las organizaciones.Palabras clave: Violencia, ergonomía, control del riesgo, análisis y desempeño de tareas (fuente: DeCS, BIREME) ABSTRACTThe phenomenon of the organizational violence is extent and complex; this is due to the multiplicity of factors and of elements of individual, economic, social and political order that there take place. This work approaches initially the problem of the violence in general then to try to specify the problem of the work violence. Today this one is a wide fi eld of investigation nevertheless in Colombia even it remains to do efforts to understand this phenomenon in an environment of political and social violence, in the frame of which rapid transformations are happening in the forms of organization of the work. Our method of work this one based on the accomplishment of semi-