Avaliação da vacinação anti-rábica e da suplementação com probiótico na resposta imune humoral em bovinos

This study evaluated the humoral immune response of a new rabies vaccine developed by the Instituto Butantan (potency of 3.27 UI/ml) in primovaccinated cattle and the effect of probiotic on this response. Thirty-four 15-month old Nelore cattle were randomly divided into 2 groups (17 animals/group). All the animals were vaccinated on day 0 (zero) and then animals in one group received probiotic added to a mineral mixture (GP) while the others were given only the mineral mixture (GC). Blood samples were collected on days 0, 75 and 150 for rabies neutralizing antibodies titers by seroneutralization assay on BHK21 cells (RFFIT). Protective antibody titers (>= 0.5 UI/mL) were found in 82.4% of the animals from GP and in 76.5% of the animals from GC and no statistical difference (p>0.05) between antibody titers in GP and GC was detected on days 75 and 150. It was also observed that in both groups antibody titers was decreased on day 150 (p<0.01). In conclusion, the tested rabies vaccine promotes efficient soroconversion and keeps antibody levels in primovaccinated cattle, but probiotic does not affect the humoral anti-rabies immune response.

Política fiscal y protección social en Chile

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Cobertura previsional en Chile: lecciones y desafíos del sistema de pensiones administrado por el sector privado

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Política fiscal y protección social: sus vínculos en la experiencia chilena

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Protección social efectiva, calidad de la cobertura, equidad y efectos distributivos del sistema de pensiones en Chile

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Análisis de género en la evaluación de los efectos socioeconómicos de los desastres naturales

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Los objetivos de desarrollo del milenio en Bogotá D.C.: propuesta de indicadores con enfoque de género

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El sistema de pensiones en Chile: resultados y desafíos pendientes

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Proyecciones del déficit previsional chileno: gasto público en pensiones asistenciales 1999-2010

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Reforma a los sistemas de pensiones y los desafíos de la dimensión de género

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La industria del cuero y de la carne: tecnologías limpias y su relocalización debido a restricciones ambientales: el caso de Chile

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Dynamics of foraging and recruitment behavior in the Asian subterranean termite Coptotermes gestroi (Rhinotermitidae)

The present study investigated the trail-following behavior of the subterranean termite Coptotermes gestroi (Wasmann Rhinotermitidae) under laboratory conditions. The results showed that workers were the first to initiate the exploration to the food source. When food was discovered they returned to the nest laying a trail for recruiting nestmates to the food source. In this situation, workers always traveled significantly faster when returning from the arenas. Both workers and soldiers were recruited to the food source; however, the soldier/worker proportion was higher during the first phase of the recruitment. When no food was available, the number of recruited nestmates and the speed on their way back to the nest were significantly lower. The results also showed that scout foragers always laid trail pheromones when entering into unknown territories, and that chemical signals found in the food could induce workers of C. gestroi to increase their travel speed. Copyright © 2012 Alberto Arab et al.

La planificacion del desarrollo y la redistribucion espacial de la poblacion

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Política fiscal y protección social en Chile

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Fiscal policy and social protection in Chile

Includes bibliography