In order to study the productive performance in broilers and hens fed DDGS, two experiments were conducted: In Exp 1, 704 Ross chicks were used from 1 to 49 d of age, divided in four treatments with eight replicates of 22 birds each one, in a completely randomized design. The treatments were: T1) sorghum-soybean meal basal diet, T2) as 1 +7% DDGS, T3) as 1 +14% DDGS, 4) as 1 +21% DDGS. In Exp 2, 288 hens Bovans White 35 wk of age were used, kept in cages for 56 d of experimentation. A completely randomized design with four treatments and three replicates of 12 hens each one was used. The treatments were: 1) sorghum-soybean meal basal diet, 2) as 1 +3% DDGS, 3) as 1 +6% DDGS, 4) as 1 +9% DDGS. The results in Exp 1, indicated (P>0.05) than the addition of 7 % of GSDS, did not affect performance and carcass yield. The results in Exp 2 showed that the use of 3, 6 and 9 % of DDGS (P>0.05) did not affect performance. There was a beneficial effect (P>0.05) in the pigmentation of egg yolk, being higher in DDGS treatments. With the results obtained in this study, we conclude that the addition of DDGS in sorghum-soybean meal diets until 7 % in broilers and 9 % in laying hens is an alternative source of protein and energy.

Para estudiar el comportamiento productivo en pollos y gallinas con dietas adicionadas con granos secos de destilería con solubles (DDGS), se realizaron dos experimentos. En el primero se emplearon 704 pollos Ross de 1 a 49 días de edad, distribuidos en cuatro tratamientos con ocho repeticiones de 22 pollos cada uno. Se empleó un diseño completamente al azar. Los tratamientos fueron: 1) dieta basal sorgo-soya, T2) como 1+7% DDGS, T3) como 1+14% de DDGS, T4) como 1+21% de DDGS. En el segundo experimento, se utilizaron 288 gallinas Bovans White de 35 semanas de edad, alojadas en jaulas durante 56 días de experimentación. Se usó un diseño completamente al azar de cuatro tratamientos con tres repeticiones de 12 gallinas cada una. Los tratamientos fueron: 1) dieta basal sorgo-soya, 2) como 1+3% DDGS, 3) como 1+6 % de DDGS, 4) como 1+9% de DDGS. Los resultados del Exp 1, indicaron que la adición del 7% de DDGS, no afectó el comportamiento productivo y de la canal (P>0.05). Los resultados en el Exp 2, mostraron que el empleo de 3, 6 y 9 % de DDGS no afectó el comportamiento productivo (P>0.05). Hubo un efecto benéfico (P<0.05) en la pigmentación de la yema del huevo, siendo mayor en los tratamientos con DDGS. Con los resultados obtenidos en este estudio, se puede concluir que la adición de DDGS en dietas sorgo-soya de hasta el 7 % en pollos de engorda y hasta 9 % en gallinas de postura, es una fuente alternativa de proteína y energía.

This study aimed at identifying the ecological characteristics of Triatoma patagonica Del Ponte 1929 (Hemiptera: Reduviidae) and evaluating the epidemiological importance of this species at its southernmost distribution limit. We carried out two surveys in the Province of Chubut, in summer and in spring, 1998. In each survey, we interviewed local health care agents for triatomine recognition and reports of the bugs, followed by entomological searches in houses and peridomestic and silvatic biotopes. The presence of T. patagonica was confirmed in two of the five localities indicated by interview. In agreement with previous studies, all these positive localities were east of the 11°C isotherm, within the Monte phytogeographic province. Triatomine abundance and infestation levels (in peridomiciles and peridomestic biotopes) were higher in summer than in spring, possibly reflecting adverse environmental conditions such as flood and cold winter weather. In the silvatic environment, we found three adult bugs under rocks in summer. In peridomestic sites bugs were only found associated with chickens, which were also the only blood meal source identified. Infection by Trypanosoma cruzi was not detected. We conclude that T. patagonica at its southernmost distribution limit does not represent a risk to public health due to its low abundance, lack of association with humans, and absence of T. cruzi infection.

In Argentina hydatidosis is a serious problem of Public Health with socioeconomic effects Strong urbanistic populational streams brought from the country local habits to urban areas. Hydatidosis became them an urban zoonosis. In spite of data on canine infection found (1.12%) are lower than those found in rural areas from the same region, the potential capacity to infect humans is higher in dogs from areas of high demographic density. The high incidences of human infections found are in accordance with this idea.

En la República Argentina, la hidatidosis constituye un serio problema que afecta a la salud publica y tiene graves repercusiones socioeconómicas. Las fuertes corrientes urbanisticas han traido consigo el traslado de algunas costumbres rurales hacia los centros poblados. A partir ae ello la hidatidosis en las areas endêmicas ha adquirido importância como zoonosis urbana. Si bien las cifras de infección canina halladas (1.12%) son significativamente inferiores que en las áreas rurales de la misma región, la capacidad potencial de infectar al hombre es muy superior en canes domiciliados en áreas de gran densidad demográfica. Las altas tasas de infección humana halladas son demostrativas de los aspectos señalados.