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ResumenEn Santa Rosa (La Pampa), se evaluó entre 2008 y 2010 el rendimiento de forraje de 22 genotipos de triticales y tricepiros y de 17 genotipos en la producción de grano. Se utilizó un diseño en bloques completos al azar con tres repeticiones y siembra en parcela estándar. Las diferencias entre ambientes y genotipos fueron evaluadas mediante Análisis de la Variancia Conjunto y se utilizó la prueba de Diferencias Mínimas Significativas (α=0,05). El promedio del rendimiento de materia seca del trienio fue para los triticales de 2508 kg ha-1 y para los tricepiros de 2007 kg ha-1. Los triticales superaron en un 25% a los tricepiros. En la producción de grano se detectó un comportamiento diferencial de las líneas en cada año de evaluación. El promedio del rendimiento de grano del trienio fue para los triticales de 1945 kg ha-1 y para los tricepiros de 1442 kg ha-1. Lostriticales superaron en rendimiento de grano en un 35% a los tricepiros. Para los materiales evaluados se evidenció una mayor estabilidad en los rendimientos de forraje que en la producción de granos. La mejora genéticahabría sido más efectiva en triticales. No obstante, se han detectado líneas de tricepiro con rendimientos similares a triticales.AbstractATwenty-two genotypes of triticales and tricepiros were assessed from 2008 to 2010 in Santa Rosa (La Pampa) for their forage yield and seventeen for grain production. A randomized complete block with three replicates and standard plot planting was used. The differences between environments and genotypes were evaluated by an overall analysis of variance and least significant difference test (α = 0.05). The average dry matter yield along the three years for triticales was 2508 kg ha-1 and for tricepiros 2007 kg ha-1. Triticales thus exceeded 25% the value obtained with tricepiros. The grain yield showed a differential behavior of the lines in each year of assessment. The average grain yield of triticales was, along the three years, 1945 kg ha-1 and in the case of tricepiros, 1442 kg ha-1. The triticales grain yield exceeded 35% that of the tricepiros. For the materials evaluated, greater stability in forage yields than in grain production was found. Genetic improvement would have been more effective in triticales; however, lines of tricepiros with yields similar to those of the triticales have been detected.

Heavy quarks (i.e. charm and beauty) in heavy-ion collisions are initially produced out of kinetic equilibrium via hard partonic scattering processes. However, recent measurements of anisotropic flow of charmed hadrons pose the question regarding the thermalization of heavy quarks in the quarkgluon plasma (QGP). Exploiting a mapping between transport theory and fluid dynamics, we develop a fluid-dynamic description for charm quarks and show results for charm-hadron momentum distributions. Inspired by recent Lattice-QCD (LQCD) calculations, we show that a late hydrodynamization within the lifetime of the QGP is possible also for beauty quarks.

The article discusses an investigation into an outbreak of progressive ataxia on a hog farm in La Pampa, Argentina as a result of consumption of piquillín plants, Condalia microphylla. Information on piquillín toxicosis is provided as well as on mal de piquillín which is considered a bovine disease. The case history is presented together with the results of the necropsy examination. Findings involving the histologic lesions are discussed along with the pathogenesis of piquillín poisoning.

We report two cases of lethal avian malaria in Magellanic Penguins (Spheniscus magellanicus) captive at San Clemente del Tuyú, Argentina, approximately 560 km north of Argentinean breeding colonies of Magellanic Penguins. Blood smears revealed both penguins were concurrently infected by Plasmodium (Haemamoeba) tejerai, Plasmodium (Huffia) sp., and Plasmodium (Novyella) sp.

This study reports 3 cases of spontaneous papillomavirus infection in 1-week-old calves. Thickening of the omasum and abomasum wall, with acute inflammation, necrosis, ulceration, and neoplastic changes were seen in 1 calf. In the other 2, small papillomas were observed in the omasal mucosa, exhibiting proliferation of the parakeratinized epithelium. Papillomavirus antigens were detected by immunohistochemistry and virus-like particles were seen through electron microscopy.

The immunohistochemistry technique was evaluated in tissue samples fixed in formaldehyde saline solution 10 % and included in paraffin to be used as a lab method allowing to identify leptospires in tissues. Samples obtained from the experimental inoculation of 8 guinea pigs carriers of L. interrogans Pomona isolated from a clinical case were used. The disease was reproduced in a lab model. The histologic sections of the kidneys of the animals inoculated were subjected to histopathological studies, immunofluorescence, Warthin-Starry stain, and immunohistochemistry technique using formaldehyde-fixed samples. This technique proved to be an efficient tool for the diagnosis of leptospirosis.

Group B Streptococcus (GBS) is the most frequent cause of early onset of neonatal sepsis. Case-fatality rate is 6-20% for newborns. Neurological sequel occurs in 30% of survivors. In 1996, the Centers for Disease Control and Prevention (CDC), the American College of Obstetricians and Gynecologists, and the American Academy of Pediatrics recommended that obstetrics providers should adopt either a culture-based or a risk-based approach for the prevention of this disease. The aim of this prospective study was to determine the colonization rate of GBS in our population of pregnant women between July 1st 2001 and December 31st 2002, and to introduce a culture-based strategy to prevent early onset neonatal GBS disease. From a population of 1756 pregnant women, 1228 were screened with rectal and vaginal swabs (69.9%). Maternal colonization rate was 1.4% (17 patients). There was one case of early-onset neonatal sepsis consistent with GBS disease (0.6%) in a patient with negative cultures. From the colonized patients, only one presented risk factors. Because most of the colonized women did not present intrapartum risk factors, the results of this study suggest that the culture-based approach should be used for the prevention of early-onset GBS disease in our population. Cost-benefit studies are needed in our country to determine if this prevention strategy is able to be implemented in all the settings of Argentina.