hugo ramirez

Simón Bolívar y la imaginación literaria americana: Gabriel García Márquez, Jorge Luis Borges y Pablo Neruda

Bulletin of Hispanic Studies, 1997

Page 1. BHS, LXXIV (1997) 197 Simón Bolívar y la imaginación literaria americana: Gabriel García ... more

Política cultural y eurocentrismo en <i>El miedo a los animales<i/> de Enrique Serna

Revista Iberoamericana, 2010

POLÍTICA CULTURAL Y EUROCENTRISMO EN EL MIEDO A LOS ANIMALES DE ENRIQUE SERNA POR HUGO MÉNDEZ-RAM... more

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La afinidad poética de Lugones y Tablada

Revista Iberoamericana, 1989

... Rcnaldi, 255). 1065 Page 8. HUGO MENDEZ-RAMIREZ dSo1nis desnudas que en el banio os cae aureo... more

Crónica de una muerte anunciada

Chasqui, 1981

SIDALC - Sistema de Informacion y Documentacion Agropecuaria de las Americas.

Pregnancy and Outcome of Uterine Allotransplantation and Assisted Reproduction in Sheep

Journal of Minimally Invasive Gynecology, 2011

to demonstrate that pregnancy can be achieved in a uterine allograft in the sheep model with the ... more to demonstrate that pregnancy can be achieved in a uterine allograft in the sheep model with the guidance of assisted reproductive technology. Uterine allotransplantation was performed in 12 sexually mature African sheep (Sudanese and Ethiopian). All animals underwent uterine transplantation via a minilaparotomy incision using a Mobius retractor device. A control group of pregnant Romney Marsh sheep with nontransplanted uteri were used to compare fetal development, uterine and placental histologic findings, and blood samples of progeny of the uterine transplant recipient sheep. Fetal size was obtained from ultrasound measurements during the early (crown-rump length) and late (biparietal diameter and abdominal circumference) gestational periods. The primary end point variables included preoperative and postoperative management, embryo transfer protocol, intraoperative assessments, and physiologic cardiopulmonary changes in the lamb during the first 5 hours of life. Four months after the initial uterine transplantation, 5 of 12 uterine allografts were considered candidates for the embryo transfer procedure. Fresh and frozen blastocyst donors were transferred accordingly to the remaining 5 uterine allografts via a minilaparotomy incision. Three of these resulted in pregnancies. One was an ectopic gestation, 1 sheep carried the pregnancy to 105 days, and 1 delivered a fully developed lamb from the transplanted uterus that was delivered via cesarean section. Neonatal lamb blood gas values and chemistry, gross organ examination, and ventilation and respiratory compliance studies yielded results normal for gestational age. This first reported case demonstrates that pregnancy can be carried in an allotransplanted uterus, with the end result a successful

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Association between major histocompatibility complex microsatellites, fecal egg count, blood packed cell volume and blood eosinophilia in Pelibuey sheep infected with Haemonchus contortus

Veterinary Parasitology, 2011

The objective of this study was to assess the correlation among traits associated with resistance... more The objective of this study was to assess the correlation among traits associated with resistance or susceptibility to Haemonchus contortus infestation and to evaluate the participation of the ovine major histocompatibility complex (MHC) in Pelibuey sheep, a prevalent breed in tropical and sub-tropical regions in Mexico and elsewhere. Association among the fecal egg count (FEC), blood packed cell volume (PCV), antibody (AB) levels, serum proteins (SP) and blood eosinophil count (EOS) was assessed in 52 lambs experimentally infected with H. contortus, and the participation of the MHC was evaluated using polymorphisms in three microsatellites, located at the class I (OMHC1) and class II (OLADRB1, OLADRB2) regions of the MHC. Spearman correlation analysis among the traits showed a negative association (P < 0.01) between FEC and PCV (−0.35), EOS (−0.50), SP (−0.30) and AB (−0.57), and a positive correlation of antibodies with EOS (0.50). The homozygotes for the OMHC1-188 and OLADRB2-282 alleles were associated with a reduction in FEC (−813 and −551, respectively). Conversely, the OMHC1-200 and OMHC1-206 alleles were associated with an increase in FEC (1704 and 1008, respectively). Furthermore, the OLADRB1-482 allele was associated with an increase of 163 EOS by allele copy, while the OMHC1-200 allele showed a reduction of 95 EOS in homozygotes. The associations among microsatellite MHC loci and the remaining variables were not significant. These results reinforce the evidence that MHC polymorphisms have an important role in parasite resistance or susceptibility in Pelibuey sheep and could be used as genetic markers to assist selection and improve parasite resistance to H. contortus.

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Study of compartmentalization in the visna clinical form of small ruminant lentivirus infection in sheep

BMC Veterinary Research, 2012

Background: A central nervous system (CNS) disease outbreak caused by small ruminant lentiviruses... more Background: A central nervous system (CNS) disease outbreak caused by small ruminant lentiviruses (SRLV) has triggered interest in Spain due to the rapid onset of clinical signs and relevant production losses. In a previous study on this outbreak, the role of LTR in tropism was unclear and env encoded sequences, likely involved in tropism, were not investigated. This study aimed to analyze heterogeneity of SRLV Env regions -TM amino terminal and SU V4, C4 and V5 segments -in order to assess virus compartmentalization in CNS. Results: Eight Visna (neurologically) affected sheep of the outbreak were used. Of the 350 clones obtained after PCR amplification, 142 corresponded to CNS samples (spinal cord and choroid plexus) and the remaining to mammary gland, blood cells, bronchoalveolar lavage cells and/or lung. The diversity of the env sequences from CNS was 11.1-16.1% between animals and 0.35-11.6% within each animal, except in one animal presenting two sequence types (30% diversity) in the CNS (one grouping with those of the outbreak), indicative of CNS virus sequence heterogeneity. Outbreak sequences were of genotype A, clustering per animal and compartmentalizing in the animal tissues. No CNS specific signature patterns were found. Conclusions: Bayesian approach inferences suggested that proviruses from broncoalveolar lavage cells and peripheral blood mononuclear cells represented the common ancestors (infecting viruses) in the animal and that neuroinvasion in the outbreak involved microevolution after initial infection with an A-type strain. This study demonstrates virus compartmentalization in the CNS and other body tissues in sheep presenting the neurological form of SRLV infection.

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