1000 resultados para Accidentes en minas


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Incluye Bibliografía

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Incluye Bibliografía

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Includes bibliography

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Incluye Bibliografía

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Esta edición del Boletín FAL aborda el tema de la seguridad vial y la necesidad de establecer medidas urgentes y coordinadas entre el sector público, el privado y la sociedad civil para impedir el rápido aumento de los muertos y heridos en accidentes viales en América Latina y el Caribe, cuestión que atenta contra la sostenibilidad del desarrollo regional.

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Existen dos sistemas de remuneración a los choferes de buses en Santiago de Chile. En uno, la mayoría de los choferes es remunerada según el número de pasajeros que transporta, lo que se traduce en su interés en maximizar el número de pasajeros transportados. Algunos de estos efectos son positivos, como el de ordenar los intervalos entre buses, minimizando de este modo, el problema del desplazamiento conjunto de varios buses a la vez. Otros son negativos, como el estilo agresivo de conducción, que puede ser muy peligroso. Se dice que los choferes "corren" y la expresión "la guerra por el boleto" es frecuentemente usada. Los choferes también pagan a trabajadores informales, conocidos en Santiago como "sapos", quienes les proporcionan información sobre los intervalos entre buses. Situaciones comparables se encuentran en varias otras ciudades latinoamericanas.El otro sistema, de salario fijo, se usa en dos empresas, que operan en las concesiones recientemente otorgadas para las rutas de acercamiento hacia las estaciones del Metro. El trabajo, tema de la actual edición del Boletín, identifica mediante un análisis tanto cuantitativo como cualitativo, los efectos de los dos sistemas, sobre los accidentes, la calidad del servicio, las actitudes de los choferes y pasajeros, y el tiempo promedio de espera para los usuarios del transporte público.

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Sólo disponible en formato electrónico.

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This study aimed to identify the Hemerobiidae (Neuroptera) associated to Brazilian savannah and gallery forest, in Minas Gerais State, Brazil. The sampling was carried every two weeks at Brazilian savannah (Cerrado) in Divinopolis and at gallery forest in Pedra do Indaia, both in Minas Gerais State, Brazil. Collecting was carried out between November 2003 and October 2004, with Malaise traps. A total of 181 specimens of five species of Hemerobiidae were collected. The species Nusalala tessellata, Megalomus impudicus, Hemerobius bolivari and Notiobiella sp. were collected in the two sites; the fifth species Sympherobius sp. was found only in Pedra do Indaia. The species of diversity (index of Shannon-Wiener) and the equitability (J) of Hemerobiidae were similar in the areas of Brazilian savannah and gallery forest (H'=0.47-0.49, respectively, and J=0.78-0.69, respectively), and the differences observed between the two locations were not significant.

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Avian salmonellosis and mycoplasmosis are infectious diseases that, in addition of causing lack of flock uniformity, represent a hazard to human health. The objective of the present study was to evaluate the seroprevalence of mycoplasmosis and salmonellosis in commercial broilers, backyard chickens, and spent hens slaughtered at a processing plant with local health inspection in Uberlandia, MG, Brazil. A total of 210 samples were randomly collected at the time of bleeding. Samples were submitted to rapid plate serum agglutination test (RSA) for the classification of Salmonella pullorum, Salmonella gallinarum, Mycoplasma gallisepticum and Mycoplasma synoviae. In order to increase result specificity, mycoplasmosis-positive samples were submitted to hemagglutination inhibition test (HI). No samples presented detectable antibodies against Salmonella pullorum or Salmonella gallinarum in the RSA test. Only Mycoplasma synoviae was detected in 14% of the backyard chickens and 0.74% in commercial broilers, whereas no antibodies were detected in spent hens. The seroprevalence rates found in the present study emphasize the need of keeping chicken flocks free from disease using effective biosafety systems.

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With the aim of studying the endoparasite fauna of horses from the Formiga city, located in center-west region of the state of Minas Gerais, 25 animals that were naturally infected with helminths were evaluated. By means of parasitological necropsies, different endoparasites were found. The subfamily Cyathostominae presented the highest incidence, followed by Trichostrongylus axei, Oxyuris equi, Triodontophorus serratus, Strongyloides westeri, Strongylus edentatus, Habronema muscae, Parascaris equorum, Probstmayria vivipara, Strongylus vulgaris, Gasterophilus nasalis, Anoplocephala magna and Anoplocephala perfoliata. In the present study, if the species Probstmayria vivipara was not considered in the prevalence, the frequency of Cyathostominae was equivalent to 94.85%. The results obtained in this study allowed us to detect and identify different species of helminths in horses, and confirmed the high incidence of nematodes belonging to the subfamily Cyathostominae in the center-west region of Minas Gerais.