Resumo Diversidade molecular, morfológica, perfil químico qualitativo e atividade antioxidante de fungos filamentosos do trato digestivo de Phylloicus sp. (Trichoptera: Calamoceratidae). Este estudo visou identificar por análises molecular, morfológica, química e por extrato antioxidante, fungos filamentosos isolados do trato digestivo de Phylloicus sp, um inseto aquático que vive entre folhagens em riachos tropicais, e participam junto com os fungos da decomposição de substratos vegetais em habitats aquáticos. Larvas de insetos de Phylloicus sp. foram coletadas em riachos no Estado do Tocantins, Brasil. Os fungos foram isolados a partir do trato digestivo das larvas após desinfecção e dissecção, depois descritos e purificados para fins de identificação e testes para atividade antioxidante. A identidade molecular foi realizada do sequenciamento ITS1 e ITS4, TUB e TEF. Os extratos fúngicos foram produzidos em solução etanólica 70% e posterior liofilização. Para análise de grupos químicos dos extratos, foi realizada cromatografia em camada delgada (CCD) em duas fases móveis e diferentes reveladores. A morfologia foi realizada por microscopia óptica corada com Azul de Toluidina e a mensuração realizada no programa ImageJ. A atividade antioxidante realizada em CCD e por método quantitativo para os radicais DPPH e peróxido de hidrogênio (H2O2). Foram identificados quatro fungos: Endomelanconiopsis endophytica, Myxospora musae, Neopestalotiopsis cubana e Fusarium pseudocircinatum. Na CCD foi evidenciado várias manchas com fase móvel acetona/clorofórmio e reveladores UV 254 nm e vapor de I2. Os extratos fúngicos demonstram ação antioxidante para redução do radical livre DPPH e em especial para H2O2 acima de 50%, E. endophytica 91.6%, M. musae 87.8%, N. cubana 89.5% e 92.3% para F. pseudocircinatum. Este estudo demonstrou que a técnica molecular por PCR foi satisfatória para identificação dos fungos, e os extratos com inúmeros grupos químicos e potentes agentes redutores. Com isso, trabalhos futuros deverão ser realizados avaliando essas quatro espécies para uso industrial.

Abstract This study aimed to identify by molecular analysis, morphology, chemistry and antioxidant extracts of filamentous fungi isolated from the digestive tract of Phylloicus sp, an aquatic insect that lives on leaf packages in tropical streams and participates together with fungi of the decomposition of plant substrates in aquatic habitats. Insect larvae of Phylloicus sp. were collected in streams in the state of Tocantins, Brazil. Fungi were isolated from the digestive tract of larvae after disinfection and dissection, then described and purified for identification purposes and testing for antioxidant activity. Molecular identity was performed of ITS1 and ITS4, TUB e TEF sequencing. Fungal extracts were produced in 70% ethanol solution and later lyophilized. For analysis of chemical groups of extracts, thin layer chromatography (TLC) was performed in two mobile phases and different developers. Morphology was performed by optical microscopy stained with Toluidine Blue and measurement performed using the ImageJ program. Antioxidant activity performed in TLC and by quantitative method for DPPH and hydrogen peroxide (H2O2) radicals. Four fungi were identified: Endomelanconiopsis endophytica, Myxospora musae, Neopestalotiopsis cubana and Fusarium pseudocircinatum. The TLC showed several spots with acetone/chloroform mobile phase and UV 254 nm developers and I2 vapor. Fungal extracts demonstrate antioxidant action to reduce the DPPH free radical and especially for H2O2 above 50%, E. endophytica 91.6%, M. musae 87.8%, N. cubana 89.5% and 92.3% for F. pseudocircinatum. This study demonstrated that the molecular technique by PCR was satisfactory for identifying fungi, and extracts with numerous chemical groups and potent reducing agents. Thus future work, should be carried out evaluating these four species for industrial use.

This paper shows the importance of performing probabilistic analyses in open pits, especially for mine planning, which can lead to more efficient ore extraction and meeting the acceptability criteria for safety in mine slopes. Three-dimensional stability analyses were performed to evaluate the future geometry of a large open pit for iron ore extraction in Brazil. The strength parameters of the lithologies were calibrated using ruptures in the pit walls. After determining the factors of safety (FoSs) from the calibrated parameters, probabilistic analyses were performed using the total range of values of each parameter under different field conditions to verify the reliability of the initial analysis. In this sense, it was possible to plot the probability of failure (PoF) and the FoS on the graph of slope height versus slope interramp angle (IRA) for the future pit in each lithology. IRA recommendations are made for two scenarios: (1) the best scenario: dry without ubiquitous joints and (2) the worst scenario: the water table at 10 m depth with ubiquitous joints in the most unfavourable direction. The results show that probabilistic evaluation is an important tool for establishing alert mechanisms in slopes that can be termed stable.

Resumen: Introducción: El tumor de células gigantes (TCG) es un tumor óseo intramedular benigno que surge con frecuencia en los extremos de los huesos largos. Después del fémur distal y la tibia proximal, el radio distal es el tercer sitio más afectado con tumores, particularmente agresivos. Nuestro objetivo es la presentación del caso clínico de una paciente con diagnóstico de TCG de radio distal clasificada en grado III de Campanacci que recibió un tratamiento ajustado a sus posibilidades económicas. Reporte de caso: Paciente femenino de 47 años, sin solvencia económica y sin ningún servicio médico. El tratamiento incluyó resección en bloque, reconstrucción con autoinjerto de peroné distal y artrodesis radiocarpiana con placa de compresión bloqueada. Dieciocho meses después, la paciente presentaba una buena fuerza de prensión (80% respecto al lado sano) y tenía una función motora fina en la mano. La muñeca presentó estabilidad con pronación de 85o, supinación de 80o, flexión-extensión de 0o y una puntuación de 6.7 en el cuestionario de evaluación de resultados funcionales DASH. Su evolución radiológica a cinco años después de su cirugía continuó sin datos de recidiva local y afectación pulmonar. Conclusión: El resultado en esta paciente, junto con los datos publicados, indican que la técnica de resección tumoral en bloque, más el autoinjerto de peroné distal y la artrodesis con placa de compresión bloqueada proporcionan un resultado óptimo de funcionalidad para el tumor radial distal grado III a bajo costo.

Abstract: Introduction: Giant cell tumor (GCT) is a benign intramedullary bone tumor that frequently arises at the ends of long bones. After the distal femur and proximal tibia, the distal radius is the third most affected site with particularly aggressive tumors. Our objective is the presentation of the clinical case of a patient diagnosed with distal radius GCT classified in grade III of Campanacci who received a treatment adjusted to her economic possibilities. Case report: A 47-year-old female, without economic solvency and with some medical service. Treatment included block resection, reconstruction with distal fibula autograft, and radiocarpal fusion with blocked compression plate. Eighteen months later, the patient had good grip strength (80% on the healthy side) and had fine motor function in the hand. The wrist presented stability with pronation of 85o, supination of 80o, flexion-extension of 0o and a score of 6.7 in the DASH functional outcomes assessment questionnaire. His radiological evaluation five years after his surgery continued with no evidence of local recurrence and pulmonary involvement. Conclusion: The result in this patient, together with the published data, indicate that the block tumor resection technique, plus distal fibula autograft and arthrodesis with blocked compression plate provide an optimal result of functionality for the grade III distal radial tumor at low cost.

Abstract: Since 2000 sustainability has become one of the main criteria for assessing and constructing road infrastructure projects. Several methodologies proposed measurements on the pavement's environmental impacts. One of the most relevant is the life cycle assessment (LCA), which estimates emissions generated by each life-cycle stage. A rating system is a tool for decision-making through an environmental rating of a project obtained by applying the best practices in sustainability that could generate impact reductions. This study makes a literature review of methodologies reported in the last years and evaluates the strengths and weaknesses.

Resumen: Desde comienzos del año 2000, la sustentabilidad se ha convertido en un criterio importante en la evaluación y constructibilidad de los proyectos de construcción vial. Diversas metodologías proponen realizar mediciones de los impactos medioambiente provocados en el pavimento. Uno de los métodos más relevantes es el Análisis del Ciclo de Vida (ACV), que estima las emisiones generadas por cada etapa del ciclo de vida. Un sistema de evaluación constituye una herramienta para la toma de decisiones a través de la evaluación medioambiental de un proyecto en el que se aplican las mejores prácticas de sostenibilidad que permitan reducir esos impactos negativos. En este estudio se analiza la literatura existente sobre las metodologías informadas durante los últimos años y evalúa sus fortalezas y debilidades.

Resumo O bioma Cerrado brasileiro apresenta em uma grande variedade de espécies endêmicas com diversos compostos bioativos, e Anadenanthera peregrina (L.) Speg é uma espécie promissora. Neste estudo, objetivamos realizar a caracterização fitoquímica e avaliar as atividades antioxidantes e antibacterianas contra Staphylococcus aureus e Escherichia coli do extrato hidroetanólico de cascas do caule de A. peregrina. As cascas foram coletadas no Jardim Botânico de Goiânia, Brasil. O extrato hidroetanólico foi obtido por percolação e submetido a triagem físico-química, estimativa de conteúdo fenólico total, impressão digital por cromatografia líquida de alta eficiência (HPLC) e determinação da atividade antioxidante (valores de IC50 foram calculados para o ensaio 2,2-difenil-1-picril-hidrazil) e antibacteriana. O pH do extrato foi de 5,21 e a densidade foi de 0,956 g/cm3. A triagem fitoquímica indicou a presença de glicosídeos cardíacos, ácidos orgânicos, açúcares redutores, saponinas hemolíticas, fenóis, cumarinas, taninos condensados, flavonóides, catequinas, depsídios e depsidonas derivados de benzoquinonas. O extrato mostrou intensa atividade hemolítica. O conteúdo fenólico total foi de 6,40 g de GAE 100 g-1. A análise por impressão digital por HPLC revelou a presença de ácido gálico, catequina e epicatequina. Confirmamos a atividade antioxidante do extrato. Além disso, o extrato não inibiu o crescimento de colônias de E. coli em nenhum volume testado, mas houve halos em torno das colônias de S. aureus nos três volumes testados. Estes resultados contribuem para uma melhor compreensão da composição química da casca de A. peregrina e apoia ainda mais as aplicações medicinais desta espécie.

Abstract The Brazilian Cerrado biome consists of a great variety of endemic species with several bioactive compounds, and Anadenanthera peregrina (L.) Speg is a promising species. In this study, we aimed to perform phytochemical characterization and evaluate the antioxidant and antibacterial activities against Staphylococcus aureus and Escherichia coli of the hydroethanolic extract of A. peregrina stem bark. The barks were collected in the Botanical Garden of Goiânia, Brazil. The hydroethanolic extract was obtained by percolation and subjected to physicochemical screening, total phenolic content estimation, high-performance liquid chromatography (HPLC) fingerprinting, and antioxidant (IC50 values were calculated for the 2,2-diphenyl-1-picrylhydrazyl assay - DPPH) and antibacterial activity determination. The pH of the extract was 5.21 and density was 0.956 g/cm3. The phytochemical screening indicated the presence of cardiac glycosides, organic acids, reducing sugars, hemolytic saponins, phenols, coumarins, condensed tannins, flavonoids, catechins, depsides, and depsidones derived from benzoquinones. The extract showed intense hemolytic activity. The total phenolic content was 6.40 g GAE 100 g-1. The HPLC fingerprinting analysis revealed the presence of gallic acid, catechin, and epicatechin. We confirmed the antioxidant activity of the extract. Furthermore, the extract did not inhibit the growth of E. coli colonies at any volume tested, but there were halos around S. aureus colonies at all three volumes tested. These results contribute to a better understanding of the chemical composition of A. peregrina stem bark and further support the medicinal applications of this species.

La carcinomatosis meníngea es una entidad poco frecuente, que puede formar parte de la historia natural de muchos procesos neoplásicos. Se presenta habitualmente con síntomas poco específicos, como cefalea, cambios en la conducta o alteraciones motoras y sensitivas. A continuación, presentamos el caso de una paciente con carcinomatosis meníngea por melanoma metastásico y su evolución clínica.

Resumen La carcinomatosis meníngea es una entidad poco frecuente, que puede formar parte de la historia natural de muchos procesos neoplásicos. Se presenta habitualmente con síntomas poco específicos, como cefalea, cambios en la conducta o alteraciones motoras y sensitivas. A continuación, presentamos el caso de una paciente con carcinomatosis meníngea por melanoma metastásico y su evolución clínica.

ABSTRACT Both spilus nevus and blue nevus (either solitary o agminated variant) are considered benign lesions. There are few cases in which both lesions appear combined, which require strict dermatological control due to the existence in literature of melanoma originated from spilus nevus and to the clinical similarities between blue nevus, metastatic melanoma and malign blue nevus. We report a case of a 28 year old woman with multiples hyperpigmented lesions on the pretibial region of the right leg , which were biopsied with histopathologic diagnosis of spilus nevus associated to blue agminated nevus.

RESUMEN Tanto el nevo de spilus como el nevo azul (ya sea su variante solitaria o agminada) son considerados lesiones benignas. Existen casos muy poco frecuentes donde se combinan ambas lesiones, los cuales requieren un estricto control dermatológico dada la existencia en la literatura de casos de melanomas desarrollados a partir de un nevo de spilus y la similitud clínica entre el nevo azul, las metástasis de melanoma y el nevo azul maligno. Presentamos el caso de una paciente de 28 años de edad que presentaba múltiples lesiones hiperpigmentadas en la región pre tibial derecha de 20 años de evolución, las cuales fueron biopsiadas con diagnostico histopatológico de nevo de spilus asociado a nevo azul agminado.

ABSTRACT We determine the nature of the Delta Scuti star AD CMi and its physical parameters from newly determined times of maximum light and other times from the literature, as well as from uvby − β photoelectric photometry.

RESUMEN A partir de los recién determinados tiempos de máximo en fotometría de la estrella Delta Scuti AD CMi y una recopilación de tiempos de máximo de la literatura, así como datos con fotométria uvby−β hemos determinado la naturaleza de esta estrella y sus parámetros físicos.

Resumo Em janeiro de 2018, um macho jovem de Didelphis aurita (Wied-Neuwied, 1826), o gambá-de-orelha-preta, foi recebido para atendimento veterinário na Clínica de Recuperação de Animais Silvestres (CRAS) da Universidade Estácio de Sá, no Rio de Janeiro, por ser portador de membro posterior direito parcialmente duplicado. Após exame radiográfico, constatou-se a ocorrência de polimelia associada a sindactilia. As imagens radiográficas revelaram as seguintes alterações no membro posterior direito: um fêmur com diâmetro aumentado, duas tíbias, duas fíbulas e ausência de hálux. As malformações observadas restringiram-se apenas ao membro posterior direito, o qual mantém sua funcionalidade. Essas alterações nunca antes foram descritas na espécie Didelphis aurita.

Abstract In January 2018, a young male of Didelphis aurita (Wied-Neuwied, 1826), the Brazilian common opossum, was admitted for veterinary evaluation at the Recovery Clinic of Wild Animals of Estácio de Sá University, CRAS, in Rio de Janeiro, Brazil, due to the presence of a partially duplicated right hind limb. After x-ray evaluation, polymelia associated with syndactyly was diagnosed. The images revealed the following alterations on the right limb: single femur with increased diameter, two tibiae, two fibulae and absence of hallux. The observed malformations were restricted to the hind right limb, which remains functional. This is the first report of such anomalies in an individual of Didelphis aurita.

Resumo Platydoryctes Barbalho and Penteado-Dias 2000 é um pequeno gênero Neotropical de vespas parasitoides (Hymenoptera: Braconidae: Doryctinae), com quatro espécies descritas até o presente. Duas novas espécies do gênero são descritas para o Brasil e uma chave para espécies é apresentada neste trabalho.

Abstract Platydoryctes Barbalho and Penteado-Dias 2000 is a small genus of Neotropical parasitoid wasps (Hymenoptera: Braconidae: Doryctinae) with four described species to date. Two new species of the genus are described from Brazil, and a key to species is presented in this paper.

Abstract Diaphorina citri detected in Ecuador for the first time in 2013, is an insect pest of global relevance. It is the main vector of the phloem-limited bacterium Candidatus Liberibacter asiaticus, the causal agent of Huanglongbing (HLB), a devastating disease of citrus trees. During the period from April 2016 - July 2017, population fluctuation studies and a search for natural enemies of D. citri were conducted on young shoots of orange jessamine, Murraya paniculata, and Citrus spp. The natural enemies of D. citri were collected in the Provinces of Guayas and Santa Elena, Ecuador. A total of 1660 specimens of predators belonging to five species were collected, consisting of three coccinellids, Cheilomenes sexmaculata, the most abundant species (39.9%, P <0.05), followed by Cycloneda sanguinea (15.8%), and Paraneda pallidula guticollis (4.1%) (Coleoptera: Coccinellidae), an assassin bug, Zelus sp. (Hemiptera: Reduviidae) (17.8%), and the lacewing Ceraeochrysa sp. (Neuroptera: Chrysopidae) (22.4%). The parasitoid wasp Tamarixia radiata also was found, reaching a parasitization rate of 90% of the psyllid nymphs. This study represents the first report of P. pallidula guticollis feeding on D. citri. The diversity of natural enemies and the high level of parasitism detected suggest the importance of natural enemies as biological control agents of this important phytophagous insect pest. The natural control by these beneficial insects would make unnecessary the applications of chemical insecticides that are carried out in Ecuador for the control of this insect, especially at this moment when the HLB causing bacterium has not been reported in Ecuador.

Resumen Diaphorina citri, especie detectada en Ecuador por primera vez en 2013, es una plaga de relevancia mundial debido a que es el principal vector de la bacteria Candidatus Liberibacter asiaticus, agente causal del Huanglongbing (HLB), una devastadora enfermedad de los cítricos. Durante el período abril 2016 – julio 2017, se realizaron estudios de fluctuación poblacional e inventario de enemigos naturales de D. citri en brotes jóvenes de azahar de la India, Murraya paniculata y citricos, Citrus spp. Los enemigos naturales fueron colectados en las provincias de Guayas y Santa Elena, Ecuador. Se colectaron un total de 1660 especímenes pertenecientes a cinco especies, entre estos, tres coccinélidos, Cheilomenes sexmaculata, la especie más abundante (39,9%, P<0,05), seguido por Cycloneda sanguinea (15,8%) y Paraneda pallidula guticollis 4,1% (Coleoptera: Coccinellidae), una chinche depredadora, Zelus sp. (Hemiptera: Reduviidae) (17,8%) y la crisopa Ceraeochrysa sp. (Neuroptera: Chrysopidae) (22,4%). La avispita parasítica Tamarixia radiata también fue encontrada, alcanzando un porcentaje de parasitismo del 90% en las ninfas de psílido. Este estudio representa el primer reporte de P. pallidula guticollis alimentándose de D. citri. La diversidad de enemigos naturales y el alto nivel de parasitismo detectado sugieren la importancia de los enemigos naturales como agentes de control biológico de esta importante plaga. El control natural existente haría innecesarias las aplicaciones de insecticidas químicos que se llevan a cabo en el Ecuador para el control de este insecto, especialmente en este momento que el HLB no se ha encontrado en Ecuador.

ABSTRACT Lumbopelvic pain is a very frequent condition that affects between 50 to 70% of pregnant women. In many cases have been a recovery over the month or three months postpartum. However, some studies showed an incomplete improvement, so it could persist or increase through years after childbirth. This condition can cause daily life limitations, it is provoking some disability grade, that many times it didn't understand with the importance that deserve. Aim To identify the lumbopelvic pain prevalence and the relation with disability grade during the third trimester of pregnancy and three months postpartum. Material and Methods Observational and prospective cohort study; the sample was 81 women studied in her third trimester of pregnancy and three months postpartum during 2014-2015 in the “Departamento de Obstetricia & Ginecologia de Clínica Las Condes”. It applied a questionnaire and the Oswestry Disability Index in both stages and self-administered. Data analysis was using STATA 10.0 software. Results 81, 48% of pregnant showed lumbopelvic pain, there were being more prevalent and significantly associated with third trimester (72, 84%, p<0,001). 25, 93% of women maintained this condition postpartum. There is a significant association between lumbopelvic pain and disability grade (p<0,001), specifically with daily life, sexual and domestic activities. Conclusions There is a high prevalence of lumbopelvic pain during pregnancy, and not less percentage maintained this condition postpartum, that associated with a high disability grade.

RESUMEN El dolor lumbopélvico es una condición muy frecuente, afectando un 50 a 70% de las mujeres durante el embarazo. En la mayoría de los casos ha habido una recuperación al mes o 3 meses postparto. Sin embargo, estudios reportan que la mejoría es incompleta, pudiendo persistir o aumentar años posterior al parto. Esta condición puede causar limitaciones en la vida diaria, provocando algún grado de discapacidad que muchas veces no es abordado con la importancia que se merece. Objetivo Determinar la prevalencia de dolor lumbopélvico y su relación con el grado de discapacidad durante el tercer trimestre de embarazo y 3 meses postparto. Material y método Estudio observacional y cohorte prospectivo; la muestra son 81 mujeres estudiadas en su tercer trimestre de embarazo y 3 meses postparto atendidas durante 2014-2015 en el Departamento de Obstetricia & Ginecología, Clínica Las Condes. Se aplicó un cuestionario y el Índice de discapacidad Oswestry en ambas etapas y autoadministrada. El análisis de datos se realizó con STATA10.0. Resultados El 81,48% de las embarazadas presentaron dolor lumbopélvico, siendo más prevalente y con una asociación significativa en el tercer trimestre (72,84%, p<0,001). El 25,93% de las mujeres lo mantiene después del parto. Existe una asociación significativa entre dolor lumbopélvico y grado de discapacidad (p<0,001), específicamente con actividades de la vida diaria, actividad sexual y actividades domésticas. Conclusiones Existe una alta prevalencia de dolor lumbopélvico en el embarazo, y un porcentaje no menor lo mantiene postparto, y en ambos casos está asociado a un grado de discapacidad.

ABSTRACT Introduction: The aim of this study was to evaluate the clinical outcomes of implant treatment of maxilla by advanced surgery techniques. Methods: 81 patients were treated with 137 Galimplant® sandblasted-etched surface implants for rehabilitation of maxilla by sinus floor augmentation, osteotomes technique and bone grafts. Implants were loaded after a healing period of 6 months with a follow-up at least of 36 months. Results: 56 patients (69.1%) were treated by sinus floor augmentation, 16 patients (19.8%) were treated by osteotomes technique and 9 patients (11.1%) with bone grafts. 106 implants (77.4%) of implants were inserted in posterior maxilla and 31 implants (22.6%) in anterior maxilla. Clinical findings showed a survival and success rate of implants of 94.2% after a mean follow-up of 50.6 months, because 8 implants were lost. Five implants were lost during healing period, and 3 implants were lost by peri-implantitis. Conclusions: This study indicate that rehabilitation of maxilla by advanced surgery techniques with implants constitute a dental treatment with a high success rate

RESUMEN Introducción: El objetivo del presente estudio era evaluar los resultados clínicos del tratamiento con implantes dentales en el maxilar superior con técnicas quirúrgicas complejas. Pacientes y métodos: 81 pacientes fueron tratados con 137 implantes Galimplant® con superficie arenada y grabada para la rehabilitación del maxilar superior mediante la técnica de elevación de seno, osteótomos e injertos óseos. Los implantes fueron cargados después de un periodo de cicatrización de 6 meses y fueron evaluados más de 3 años. Resultados: 56 pacientes (69,1%) fueron tratados mediante elevación del seno maxilar, 16 pacientes (19,8%) fueron tratados mediante la técnica de osteótomos y 9 pacientes (11,1%) con injertos óseos. 107 implantes fueron insertados (77,4%) en el sector posterior maxilar mientras que 31 implantes (22,6%) en el sector anterior. Los hallazgos clínicos indican una supervivencia y éxito de los implantes del 94,2%; después de un periodo medio de seguimiento de 50,6 meses, ya que 8 implantes se perdieron durante el periodo de cicatrización y 3, por periimplantitis. Conclusiones: Este estudio indica que la rehabilitación del maxilar superior mediante técnicas quirúrgicas complejas con implantes constituye un tratamiento odontológico con una elevada tasa de éxito.

Abstract: To determine the effect of oxytocin addition to semen on the performance of sows served, during summer-autumn, 223 multi parturient hybrid sows were utilized, assigned to one of two treatments in a completely randomized design. Treatments were: 1) Control (n = 111), sows inseminated with a reduced semen dosage (1.5 x 109 viable sperms cells in 40 mL of diluent), and 2) Test group (n = 112) Control plus the addition of 4 IU oxytocin to semen before service. Sows were inseminated from June to October 2012, using the technique of post cervical artificial insemination. The total number born piglet (TBP) and total number alive born (TAB) were registered at calving, those who were compared by ANOVA (P < 0.05). The farrowing rate was compared by X2 analyses, using 2 x 2 contingency tables. The addition of oxytocin to semen doses did not change (P > 0.05) litter size (11.03 vs. 10.78 TBP; 9.83 vs. 9.62 TAB). The 4 UI oxytocin addition to semen before service improved (P = 0.03) by 9.07 % the farrowing rate (84.68 vs. 93.75%). It is concluded that the addition of 4 IU of oxytocin to the reduced seminal doses, improves farrowing rate in sows inseminated during the warm season.

Resumen: Para determinar el efecto de la adición de oxitocina al semen en el desempeño reproductivo de las cerdas servidas durante la época de verano-otoño, se utilizaron 223 cerdas multíparas híbridas, asignadas a uno de dos tratamientos en un diseño experimental completamente al azar. Los tratamientos fueron:1) Testigo (n = 111), cerdas inseminadas con dosis seminales reducidas (1.5 x 109 espermatozoides en 40 mL de diluyente), y 2) Grupo de prueba (n = 112), testigo más la adición de 4 UI de oxitocina antes del servicio. Las cerdas fueron inseminadas entre junio y octubre de 2012, usando la técnica de inseminación post-cervical. El número de lechones nacidos totales (LNT) y nacidos vivos (LNV) fueron registrados al parto, a los que se le aplicó un ANDEVA (P < 0.05). La tasa de parto fue comparada por análisis de X2 , utilizando tablas de contingencia 2 x 2. La adición de oxitocina al semen no modificó (P > 0.05) el tamaño de camada (11.03 vs. 10.78 LNT; 9.83 vs. 9.62 LNV). La adición de 4 UI de oxitocina al semen antes de la inseminación mejoró (P = 0.03) en 9.07 % la tasa de parto (84.68 vs. 93.75%). Se concluye que la adición de 4 UI de oxitocina a dosis seminales reducidas mejora la tasa de parto en hembras inseminadas durante la época cálida.