ABSTRACT Background: The Pulmonary Embolism Severity Index (PESI) is used to categorize the risk of death in acute pulmonary em bolism (PE). By definition, cancer patients will always have a high simplified PESI score and will be considered at high risk. There is limited information regarding whether patients with an intermediate or high PESI score (≥86 points) and cancer are at greater risk of an unfavorable progression versus those without cancer. Objectives: To determine whether the presence of active cancer in patients with a PESI score ≥86 points is associated with an unfavorable progression versus those without cancer. Methods: A retrospective analysis in patients with PE and a PESI score ≥86, between 2008 and 2022. The occurrence of in-hospital mortality (IHM) the use of vasopressor drugs (VDs), and the need for mechanical ventilatory support (MVS) were evaluated in patients with vs. without cancer. Results: 209 patients were analyzed. The population with cancer was younger than patients without cancer (65 vs 70 years; p=0.006), showed high simplified PESI values more frequently (100% vs 84%; p<0.001), had lower MVS requirement (9% vs 34%; p=0.005), and used fewer VDs (11% vs 23%; p=0.019). However, no difference was observed in IHM rates (12.7% vs 8%; p=NS). Conclusions: Patients with PE and a PESI score ≥86 who have cancer did not show higher IHM and also had lower MVS and VDs requirement. Therefore, in the studied population, patients with PE and cancer had no greater risk of having an unfavorable progression.

RESUMEN Introducción: El Índice de Severidad del Embolismo Pulmonar (PESI) se utiliza para categorizar el riesgo de mortalidad en el tromboembolismo pulmonar agudo (TEP). Por definición, los pacientes con cáncer siempre presentarán un puntaje PESI simplificado alto y serán considerados de mayor riesgo. Existe información limitada respecto de si los pacientes con PESI intermedio o alto (≥86 puntos) y cáncer activo, tienen mayor riesgo de presentar una evolución desfavorable respecto de aquellos sin cáncer. Objetivos: Determinar si, en pacientes con TEP y un puntaje PESI ≥86 puntos, la presencia de cáncer activo se asocia a una evolución desfavorable respecto de aquellos sin cáncer. Material y métodos: Análisis retrospectivo en pacientes con TEP y un puntaje PESI ≥86, entre los años 2008 y 2022. Se evaluó la ocurrencia de muerte intrahospitalaria (MIH), uso de drogas vasopresoras (DV) y necesidad de asistencia respiratoria mecánica (ARM) en los pacientes con vs. sin cáncer. Resultados: Se analizaron 209 pacientes. La población con cáncer, respecto de aquella sin cáncer, resultó ser más joven (65 vs. 70 años; p=0,006), presentó valores de PESI simplificado altos con mayor frecuencia (100 % vs. 84 %; p<0,001), tuvo menor requerimiento de ARM (9 % vs. 34 %; p=0,005) y menor uso de DV (11 % vs. 23 %; p=0,019), aunque no se observaron dife rencias en las tasas de MIH (12,7 % vs. 8 %; p=NS). Conclusiones: Los pacientes con TEP y un puntaje PESI ≥86 con cáncer no presentaron mayor MIH e incluso tuvieron menor requerimiento de ARM y DV. En la población estudiada, los pacientes con TEP y cáncer no tuvieron mayor riesgo de presentar una evolución desfavorable.

ABSTRACT The aging process is marked by a sedentary lifestyle and little physical activity, which is associated with the rapid and continuous decline in functional capacities, dependency and fragility. The objective of the work is aimed at assessing, through the test of maximum repetitions with non-extreme weights, the effect of the application of exercises with weights for the care of sarcopenia. Methods from the theoretical and empirical levels such as synthetic analytical, inductive-deductive, documentary review, documentary analysis, observation, survey and interview were applied. As a working instrument, a set of strength endurance and aerobic physical exercises was applied that allowed the measurement method to be used in seven older adults with sarcopenia, treated at the Center for Physical Activity and Health of the University of Sciences. of Physical Culture and Sports ¨Manuel Fajardo¨. The muscular strength work was evaluated using the aforementioned test, which made it possible to identify the real weight of the physical load with which they must train and, on that basis, the set of exercises with weights was developed. In the preliminary results recorded, through the application of the test, it was confirmed that the integration of weight work and aerobic work favorably influences strength gain in the older adults.

RESUMO O processo de envelhecimento é marcado por um estilo de vida sedentário e pouca atividade física, o que está associado ao declínio rápido e contínuo das capacidades funcionais, à dependência e à fragilidade. O objetivo do trabalho visa avaliar, por meio do teste de repetições máximas com pesos não extremos, o efeito da aplicação de exercícios com carga no tratamento da sarcopenia. Foram aplicados métodos dos níveis teórico e empírico como analítico, sintético, indutivo, dedutivo, revisão documental, análise documental, observação, levantamento e entrevista. Como instrumento de trabalho foi aplicada uma bateria de exercícios físicos resistidos de força e aeróbios que permitiu a utilização do método de mensuração em sete idosos com sarcopenia atendidos no Centro de Atividade Física e Saúde da Universidade de Ciências da Cultura Física e. Desporto ¨ Manuel Fajardo. O trabalho de força muscular foi avaliado por meio do referido teste, que possibilitou identificar o real peso da carga física com a qual devem treinar e, com base nisso, foi desenvolvida a bateria de exercícios com pesos. Nos resultados preliminares registrados, por meio da aplicação do teste, foi confirmado que a integração do trabalho com pesos e do trabalho aeróbio influencia favoravelmente o ganho de força em idosos.

RESUMEN El proceso de envejecimiento está marcado por el sedentarismo y la escasa actividad física, lo que se asocia a la disminución rápida y continua de las capacidades funcionales, la dependencia y la fragilidad. El objetivo del trabajo se orienta a valorar, mediante el test de repeticiones máximas con pesos no extremos, el efecto de la aplicación de ejercicios con pesas para la atención de la sarcopenia. Se aplicaron métodos de los niveles teóricos y empíricos como el analítico, sintético, inductivo, deductivo, revisión documental, análisis documental, observación, encuesta y entrevista. Se aplicó, como instrumento de trabajo, una batería de ejercicios físicos de resistencia a la fuerza, y aeróbicos que permitieron utilizar el método de medición en siete adultos mayores con sarcopenia, atendidos en el Centro de Actividad Física y Salud de la Universidad de las Ciencias de la Cultura Física y Deportes ¨ Manuel Fajardo. Se evaluó el trabajo de fuerza muscular mediante el test mencionado, lo que permitió identificar el peso real de la carga física con la que deben entrenar y, sobre esa base, se elaboró la batería de ejercicios con pesas. En los resultados preliminares registrados, mediante la aplicación del test, se constató que la integración del trabajo con pesas y el aeróbico influyen de manera favorable en la ganancia de fuerza en el adulto mayor.

Abstract Introduction The lama-bordo systems (LBS) are built in natural watercourses and favor retention of sediment and runoff moisture for the development of agricultural activity. Objective To obtain a model for predicting the volume of soil permanently captured by LBS, based on the morphometric and hydrological characteristics of the micro-watersheds where they have prevailed in the Mixteca Alta of Oaxaca, Mexico Materials and methods The study was carried out in 27 sites where morphometric parameters and hydrological indexes were determined to obtain the volume prediction model by multiple linear regression (backward elimination technique). Results and discussion The systems studied were found in micro-watersheds under conditions that favor sediment transport: elongated shape, areas smaller than 2 km2 with 1st and 2nd order streams, at altitudes above 2 000 m and slopes greater than 10 %. Twelve morphometric parameters and three hydrological indexes characterize these micro-watersheds and explain the physical conditions that allow their establishment, but only four (micro-watershed area, average slope of the mainstream, topographic wetness index and sediment transport index) explain the cumulative sediment volume (R2 = 0.85, P < 0.001). Conclusions The model evaluated for volume estimation is reliable for application at sites under similar conditions.

Resumen Introducción Los sistemas lama-bordo (SLB) se construyen en cauces naturales y favorecen la retención de sedimentos y humedad del escurrimiento para el desarrollo de la actividad agrícola. Objetivo Obtener un modelo de predicción de volumen de suelo captado por los SLB en forma permanente, a partir de las características morfométricas e hidrológicas de las microcuencas donde estos han prevalecido en la Mixteca Alta de Oaxaca, México. Materiales y métodos El estudio se hizo en 27 sitios donde se determinaron parámetros morfométricos e índices hidrológicos que permitieron obtener el modelo de predicción de volumen mediante regresión lineal múltiple tipo backward stepwise. Resultados y discusión Los sistemas estudiados se encontraron en microcuencas bajo condiciones que favorecen el transporte de sedimentos: forma alargada, áreas menores de 2 km2 con corrientes de 1° y 2° orden, en altitudes superiores a los 2 000 m y pendientes mayores de 10 %. Doce parámetros morfométricos y tres índices hidrológicos caracterizan dichas microcuencas y explican las condiciones físicas que permiten su establecimiento, pero solo cuatro (área de la microcuenca, pendiente media de la corriente principal, índice topográfico de humedad e índice de transporte de sedimentos) explican el volumen de sedimento acumulado (R2 = 0.85, P < 0.001). Conclusiones El modelo evaluado para la estimación de volumen es confiable para su aplicación en sitios bajo condiciones similares.

Resumen Introducción : El carcinoma hepatocelular (HCC) es el cáncer primario más común del hígado y la tercera causa principal de muerte por cáncer en todo el mun do. La resección hepática es el tratamiento de elección para pacientes no cirróticos, mientras que, en cirróticos, la elección depende del estadio tumoral y la función hepática. Métodos : En este estudio retrospectivo realizado en el Hospital El Cruce entre 2015 y 2022, se evaluaron pa cientes con HCC sometidos a resección hepática, tanto cirróticos como no cirróticos. Se analizó la morbimorta lidad, la tasa de recurrencia y la sobrevida. Resultados : Se realizaron 262 hepatectomías, 44 fue ron para tratamiento del HCC, de las cuales 35 fueron hepatectomías menores, y 9 hepatectomías mayores (no cirróticos). La mayoría eran hombres (77%) con una edad promedio de 58.5 años. Hubo 29 pacientes con cirrosis, siendo la hepatitis C (HCV) la causa principal en un 48%, HCV con alcohol como cofactor (21%) y alcohol (17%). La morbilidad fue del 47.7%, con complicaciones menores predominantes. La recurrencia de enfermedad ocurrió en el 59% de los pacientes, y los factores asociados incluyeron tamaño tumoral y niveles elevados de Alfa-fetoproteína. La supervivencia fue mejor en pacientes cirróticos en comparación con no cirróticos. Conclusión : La resección hepática es una opción efectiva para el tratamiento del HCC en pacientes bien seleccionados cirróticos y no cirróticos, con resultados alentadores en términos de supervivencia y control de la enfermedad. Además, se sugiere una vigilancia cercana para detectar recurrencias tempranas y proporcionar tratamientos oportunos.

Abstract Introduction : Hepatocellular carcinoma (HCC) is the most common primary liver cancer and the third lead ing cause of cancer-related deaths worldwide. Hepatic resection is the treatment of choice for non-cirrhotic patients, while in cirrhotic individuals, the choice de pends on tumor stage and liver function. Methods : In this retrospective study conducted at Hospital El Cruce between 2015 and 2022, patients with HCC undergoing hepatic resection, both cirrhotic and non-cirrhotic, were evaluated. Morbidity, mortality, re currence rate, and survival were analyzed. Results : A total of 262 hepatectomies were performed, with 44 for HCC treatment. Among them, 35 were minor hepatectomies, and 9 were major hepatectomies (non-cirrhotic patients). The majority were males (77%) with an average age of 58.5 years. Twenty-nine patients had cirrhosis, with hepatitis C (HCV) being the main cause in 48%, HCV with alcohol as a cofactor (21%), and alcohol alone (17%). Morbidity was 47.7%, with predominance of minor complications. Disease recurrence occurred in 59% of patients, and associated factors included tumor size and elevated AFP levels. Survival was better in cir rhotic patients compared to non-cirrhotic ones. Discussion : Results tion 5837Hepatic resection is an effective option for treating HCC in well-selected cirrho tic and non-cirrhotic patients, with encouraging results in terms of survival and disease control. Additionally, close surveillance for early recurrence detection and timely interventions is suggested.

ABSTRACT The objective of this work is to design and implement an adaptive control in conjunction with vector control, with changes in the desired dynamics for the positioning of two degrees of freedom robotic arms. The dynamic model is obtained by applying the Euler-Lagrange method in conjunction with that of a permanent magnet synchronous motor in the synchronous DQ reference frame. An adaptive controller is designed by reference model that generates the reference torque for the vector control of the electric motor. The stability of the closed-loop system is guaranteed by applying the Lyapunov method in the adaptive laws. The control strategy is implemented on the TMS320F28335 processor using the MATLAB and Code Composer tools. The results of the experimental tests are compared with the original control scheme, obtaining a system with lower dynamic errors.

RESUMEN El presente trabajo tiene como objetivo diseñar e implementar un control adaptativo en unión al control vectorial, con cambios en las dinámicas deseadas para el posicionamiento de los brazos robóticos de dos grados de libertad. El modelo dinámico se obtiene de aplicar el método de Euler-Lagrange en conjunto con el de un motor síncrono de imanes permanentes en el marco de referencia DQ sincrónico. Es diseñado un controlador adaptativo por modelo de referencia que genera el torque referencial para el control vectorial del motor eléctrico. La estabilidad del sistema en lazo cerrado es garantizada al aplicar el método de Lyapunov en las leyes adaptativas. La estrategia de control se implementa en el procesador TMS320F28335 empleando las herramientas MATLAB y Code Composer. Los resultados de las pruebas experimentales son comparados con el esquema de control original obteniéndose un sistema con menores errores dinámicos.

Abstract In Mexico, citrus farming represents one of the most important economic activities for national fruit growing, with a production of 8.8 million tonnes and an economic spillover of more than 47 billion pesos per year. Nonetheless, production is affected by pests and diseases, with Huanglongbing (HLB), ‘yellow dragon’ or citrus greening, standing out as the most devastating disease worldwide, caused by a proteobacterium of the genus Candidatus Liberibacter (Ca. L.). Because there is no effective method to control this disease, correct and timely detection can significantly reduce its spread. The purpose of this review is to compile methods used for detecting the presence of Ca. L. in citrus plants, covering general aspects of the symptomatology of the disease, molecular methods for accurate and rapid detection when sampling both in plants and in the vector. In addition, different protocols are mentioned that analyze some compounds produced during infection with Ca. L. and images in citrus with HLB.

Resumen En México, la citricultura representa una de las actividades económicas más importantes para la fruticultura nacional, con una producción de 8.8 millones de toneladas y una derrama económica de más de 47 mil millones de pesos al año. Sin embargo, la producción se ve afectada por plagas y enfermedades, destacando el Huanglongbing (HLB), ‘dragón amarillo’ o enverdecimiento de los cítricos, como la enfermedad más devastadora a nivel mundial, ocasionada por una proteobacteria del género Candidatus Liberibacter (Ca. L.). Debido a que no existe un método efectivo para controlar esta enfermedad la correcta y oportuna detección puede reducir significativamente su diseminación. El propósito de la presente revisión es recopilar métodos que se emplean para la detección de la presencia de Ca. L. en plantas de cítricos, cubriendo aspectos generales sobre la sintomatología de la enfermedad, métodos moleculares para una precisa y rápida detección al realizar el muestreo tanto en plantas como en el vector. Asimismo, se mencionan diferentes protocolos que analizan algunos compuestos producidos durante la infección con Ca. L. e imágenes en cítricos con HLB.

Resumen: Las bacterias ácido lácticas (BAL) son microorganismos generalmente considerados como seguros y poseen una gran capacidad para la bioconservación. Como agentes bioconservantes, las BAL pueden aplicarse como cultivos viables para la producción de compuestos antimicrobianos o explotando agentes químicos. Las BAL son conocidas por la producción de una variedad de compuestos antagónicos, entre ellos la bacteriocinas, y su potencial antimicrobiano está definido por la acción combinada de los metabolitos sobre bacterias no de- seadas. En este trabajo se evalúa la actividad antimicrobiana de 7 cepas de BAL aisladas de leche cruda y queso Paraguay: Enterococcus faecium (M6A y M6B), Lactobacillus fermentum (M16A y M17A), Lactobacillus rhamnosus (M17B) y Lactobacillus plantarum (M18 y M21) frente a E. coli , S. aureus y L. monocytogenes.

Abstract: Lactic acid bacteria (LAB) are generally regarded as safe microorganisms with great potential for biopreservation. As biopreservative agents, LAB can be applied as viable cultures for the production of antimicrobial compounds or exploiting chemical agents. LAB are known for the production of a variety of antagonistic compounds, among them bacteriocins, and their antimicrobial potential is defined by the combined action of metabolites on non-desired bacteria. This work evaluates the antimicrobial activity of 7 strains of LAB isolated from raw milk and Paraguay cheese: Enterococcus faecium (M6A y M6B), Lactobacillus fermentum (M16A y M17A), Lactobacillus rhamnosus (M17B) and Lactobacillus plantarum (M18 y M21) against E. coli , S. aureus and L. monocytogenes .

Abstract Introduction: Short-term gametes storage is an inexpensive and simple technique that allows the use of the same batch of eggs or sperm at different times, maximizing the application of research protocols and the use of gametes in production. Arbacia dufresnii is a sea urchin species with proven aquaculture potential and already used in the nutraceutical industry. Aging of its gametes is unknown and is a needed information to scale up the production. Objective: Determine the effect of male and female gamete aging on the fertilization success of Arbacia dufresnii. This will allow optimizing the use of gametes after collection decoupling spawning from fertilization. Methods: A. dufresnii individuals were induced to spawn and gametes were kept at 12 ± 1 °C throughout each bioassay. Sperm was separated into two treatments: activated sperm in seawater (AS), and dry sperm (DS). Two bioassays were made: Bioassay 1 evaluated the effect of time on fertility by performing fertilization tests at 0 h, 24 h, 48 h, 72 h, and 96 h after spawning. Bioassay 2 evaluated the contribution of each type of aged gamete on fertility, combining aged gametes (96 h) with fresh gametes (0 h). Results: Bioassay 1: the fertilization success obtained by combining eggs (E) with AS or DS presented important differences. While the fertilization success remained acceptable (greater than 50 %) for up to 72 h using ExDS, it only remained acceptable for up to 48 h using ExAS. Bioassay 2: acceptable fertilization success was found by combining aged E (96 h) with fresh sperm, or aged DS (96 h) with fresh E, but not using aged AS with fresh E. Conclusions: The findings of this work show that fertilization success in A. dufresnii gametes remains relatively unchanged for up to 48 h after spawning when combining ExAS, and for up to 72 h when combining ExDS. However, when combining aged E or aged DS with a fresh gamete, post-collection fertilization can be extended up to 96 h. In this work, the first steps have been taken to understand the conservation time of A. dufresnii gametes with minimum intervention.

Resumen Introducción: El almacenamiento de gametos a corto plazo es una técnica económica y sencilla que permite utilizar el mismo lote de óvulos o espermatozoides en diferentes momentos, maximizando la aplicación de protocolos de investigación y el uso de gametos en la producción. Arbacia dufresnii es una especie con probado potencial acuícola como fuente de gametos para la industria nutracéutica. Sin embargo, se desconoce el envejecimiento de sus gametos y es una información necesaria para escalar la producción. Objetivo: Determinar el efecto del envejecimiento de los gametos masculinos y femeninos en el éxito de la fecundación de Arbacia dufresnii con el fin de optimizar el aprovechamiento de los gametos después de la recolecta desincronizando el desove de la fecundación. Métodos: Se indujo el desove de individuos de A. dufresnii y los gametos se mantuvieron a 12 ± 1 °C durante cada bioensayo. El esperma se separó en dos tratamientos: esperma activado en agua de mar (AS) y esperma seco (DS). Se realizaron dos bioensayos: El Bioensayo 1 evaluó el efecto del tiempo sobre la fertilidad realizando pruebas de fecundación a las 0 h, 24 h, 48 h, 72 h y 96 h después del desove. El bioensayo 2 evaluó la contribución de cada tipo de gameta envejecida (96 h) sobre la fertilidad, combinando gametos envejecidas (96 h) con gametos frescas (0 h). Resultados: Bioensayo 1: el éxito de fecundación obtenido combinando huevos (E) con AS o DS presentó diferencias importantes. Si bien el éxito de la fecundación se mantuvo aceptable (más del 50 %) durante un máximo de 72 h con ExDS, solo permaneció aceptable hasta 48 h con ExAS. Bioensayo 2: se encontró un éxito de fecundación aceptable combinando E envejecidos (96 h) con esperma fresco, o DS envejecido (96 h) con E fresco (0 h), pero no usando AS envejecido con E fresco (0 h). Conclusiones: Los hallazgos de este trabajo muestran que el éxito de la fecundación en los gametos de A. dufresnii permanece relativamente sin cambios hasta 48 h después del desove cuando se combina ExAS, y hasta 72 h cuando se combina ExDS. Sin embargo, cuando se combina E envejecido o DS envejecido con un gameto fresco, el tiempo entre la recolección y la fecundación puede extenderse hasta 96 h. En este trabajo se han dado los primeros pasos para entender el tiempo de conservación de los gametos de A. dufresnii con mínima intervención.

ABSTRACT During the SARS-CoV-2 pandemic, we observed an increase in morbidity and mortality secondary to surgical procedures. The mortality rate for elective surgery is estimated at 19.1% and is 26% for emergency procedures. Additionally, approximately half of patients who undergo surgery while infected with SARS-CoV-2 experience postoperative pulmonary complications. Due to limitations caused by the health emergency, cancer treatments in our country have been affected in terms of hospitalization capabilities and implementation of chemotherapy treatments. We report the first ALPPS (associating liver partition with portal vein ligation for staged hepatectomy) procedure performed in northeastern Argentina on a patient with multiple colorectal metastases during the SARS-CoV-2 pandemic, with successful outcomes.

RESUMEN Durante la pandemia por SARS-CoV-2 evidenciamos un aumento de la morbimortalidad secundario a procedimientos quirúrgicos. Se estima una mortalidad a los 30 días del 19,1% en cirugías programadas y del 26% en procedimientos quirúrgicos de emergencia, y alrededor de la mitad de los pacientes que se someten a cirugía estando infectados con SARS-CoV-2 experimentan complicaciones pulmonares posoperatorias. Los tratamientos oncológicos sufrieron deficiencias en nuestro país debido a las limitantes secundarias a la emergencia sanitaria, en cuanto a capacidad de internación e implementación de los tratamientos quimioterápicos. Informamos la primera cirugía de ALPPS (associating liver partition with portal vein ligation for staged hepatectomy) realizada en el nordeste argentino en una paciente con metástasis colorrectales múltiples en contexto de la pandemia por SARS-CoV-2, con buenos resultados.

Abstract Objective: Radical prostatectomy is a therapeutic option in organ-confined prostate cancer. As the development of robotic systems progresses, the approach with this technology has begun to impact the functional and oncological outcomes of urological patients. The objective is to report the rate of pentafecta in patients undergoing robot-assisted radical prostatectomy (RARP) stratified by risk groups. Method: Retrospective, observational, descriptive study from 2013 to 2020 that included 112 patients undergoing RARP. Results: A rate of pentafecta at 12 months of follow-up of 35.7% (n = 40) was obtained. In the subanalysis by risk groups, at 1-year follow-up, was obtained an index of 43% (n = 26), 26% (n = 9) and 22% (n = 4) in low-, intermediate-, and high-risk patients, respectively. Conclusions: Prostatectomy showed functional and oncological results similar to those reported in the literature with robotic approach, regardless of the risk group for prostate cancer.

Resumen Objetivo: La prostatectomía radical es la alternativa terapéutica de elección en el cáncer de próstata confinado al órgano. Conforme avanza el desarrollo de los sistemas robóticos, el abordaje con esta tecnología ha comenzado a impactar en los desenlaces funcionales y oncológicos de los pacientes urológicos. El objetivo es reportar el índice de pentafecta en pacientes sometidos a prostatectomía radical asistida por robot (PRRA) estratificados por grupos de riesgo. Método: Estudio retrospectivo, observacional, descriptivo, de 2013 a 2020, que incluyó 112 pacientes sometidos a PRAR. Resultados: Se obtuvo un índice de pentafecta a 12 meses de seguimiento del 35.7% (n = 40). En el subanálisis por grupos de riesgo, al año de seguimiento, se obtuvieron unos índices del 43% (n = 26), el 26% (n = 9) y el 22% (n = 4) en los pacientes de bajo, intermedio y alto riesgo, respectivamente. Conclusiones: La prostatectomía demostró resultados funcionales y oncológicos similares a lo reportado en la literatura con abordaje robótico independientemente del grupo de riesgo del cáncer de próstata.

Resumo: A diarréia neonatal em bezerros (DNB) é uma doença infecciosa grave em todo o mundo. No Uruguai, a taxa de mortalidade de bezerros associada a doenças infecciosas é alta. O colostro representa a principal fonte de anticorpos e está correlacionado com bons indicadores de saúde e sobrevivência durante a lactação. A vacinação contra a DNB melhora a composição de imunoglobulinas do colostro em vacas prenhes e o seu correto consumo garante a transmissão de anticorpos ao neonato. As vacinas contra DNB geralmente contêm bacterina ou fímbrias purificadas de E. coli, como a bacterina de E. coli CS31A+, bem como antígenos virais. A prevalência de clpG é uma das mais altas entre os genes de virulência de E. coli em fezes de bezerros no Uruguai. ClpG é a proteína estrutural da adesina CS31A. O objetivo do trabalho foi determinar o nível de anticorpos anti-ClpG no colostro de vacas Holandesas não vacinadas e vacinadas contra DNB no Uruguai. O estado funcional da glândula mamária foi analisado. Não foram encontradas diferenças significativas na composição de proteína ou lactose. As diferenças em termos de gordura foram consideradas dentro da média do colostro. Para as análises de anticorpos, uma proteína ClpG recombinante foi purificada usando um sistema de expressão de E. coli. As análises de ELISA mostraram anticorpos anti-ClpG em ambos os grupos, refletindo a exposição natural das vacas às cepas de E. coli CS31A+. Com o modelo misto utilizado, não foi detectada homogeneidade de variância, mas foram encontradas diferenças significativas nas medianas dos valores de IgG entre vacas vacinadas e não vacinadas. Em vacas vacinadas, foi observada uma tendência de aumento de IgG anti-ClpG no colostro, o que poderia resultar em um melhor resultado para os bezerros se a transferência passiva ocorresse de forma efetiva.

Resumen: La diarrea neonatal de terneros (DNT) es una enfermedad infecciosa grave a nivel mundial. En Uruguay, la tasa de mortalidad de terneros asociada a enfermedades infecciosas es alta. El calostro constituye la principal fuente de anticuerpos y se correlaciona con buenas trazas de salud y supervivencia durante la lactancia. La vacunación contra la DNT mejora la composición de inmunoglobulinas del calostro en vacas preñadas y su correcto consumo asegura la transmisión de anticuerpos al neonato. Las vacunas contra la DNT frecuentemente contienen bacterina o fimbrias purificadas de E. coli, como bacterina de E. coli CS31A+, así como antígenos virales. La prevalencia de clpG es una de las más altas entre los genes de virulencia de E. coli en heces de terneros en Uruguay. ClpG es la proteína estructural de la adhesina CS31A. El objetivo del trabajo fue determinar el nivel de anticuerpos anti-ClpG en calostro de vacas holstein-friesian sin vacunar y vacunadas contra la DNT en Uruguay. Se analizó el estado funcional de la glándula mamaria. No se encontraron diferencias significativas en la composición de proteína o lactosa. Las diferencias en términos de la grasa se asumieron dentro del promedio para el calostro. Para los análisis de anticuerpos se purificó una proteína ClpG recombinante usando un sistema de expresión en E. coli. Los análisis de ELISA mostraron anticuerpos anti-ClpG en ambos grupos, lo que refleja la exposición natural de las vacas a cepas E. coli CS31A+. Con el modelo mixto utilizado no se detectó homogeneidad de varianza, pero sí diferencias significativas en las medianas de los valores de IgG entre vacas vacunadas y no vacunadas. En vacas vacunadas se observó una tendencia de aumento de IgG anti-ClpG en el calostro, lo que podría resultar en un mejor resultado para los terneros si la transferencia pasiva ocurre efectivamente.

Abstract: Neonatal calf diarrhea (NCD) is a severe infectious disease, distributed worldwide. In Uruguay, the calf mortality rate in dairy farms associated with infectious diseases is high. Colostrum intake constitutes the primary source of antibodies of neonates and correlates with good tracers of health and survival during the suckling stage. Vaccination against NCD improves the colostrum’s immunoglobulin composition in pregnant cows. Its correct consumption ensures the transmission of antibodies to the calf and should prevent or reduce the occurrence and outcome of diseases. Several vaccines against NCD are on the market, containing E. coli bacterin, purified E. coli fimbriae together with toxoids, and viral antigens. E. coli CS31A+ bacterin have been included in some vaccines against NCD. The prevalence of clpG is one of the highest among E. coli virulence genes in calves feces in Uruguay. ClpG is the structural protein of CS31A adhesin. This work aimed to determine the level of anti-ClpG antibodies in the colostrum of Holstein-Friesian cows without vaccination and vaccinated against NCD in Uruguay. The colostrum composition was analyzed to determine the functional state of the mammary gland. Non-significant differences were determined in the colostrum-protein or -lactose composition. The differences in terms of fat were assumed on the average for colostrum. A recombinant ClpG protein was purified using a prokaryotic expression system from E. coli. ELISA analyses showed anti-ClpG antibodies in both groups of bovines, reflecting the natural exposure of cows to E. coli CS31A+ strains. Mixed model analysis showed no variance homogeneity between groups but significant differences in medians of the IgG values between groups of cows. A tendency to increase the amount of IgG against ClpG in the colostrum of vaccinated cows was observed, which can result in a better outcome for the calves if the passive transfer of IgG effectively occurs.

Resumo O amarelecimento letal (LY) é uma doença que afecta o coqueiro e outras espécies de palmeiras. Está associada a fitoplasmas do grupo 16SrIV e o único vector de insectos notificado até agora para este patogéneo é o Haplaxius crudus. O H. crudus está presente no México e foi associado aos fitoplasmas do grupo 16SrIV, no entanto, não foi detectável durante um surto de LY na costa de Yucatan, México, sugerindo a existência de outras espécies de vectores. Para testar esta hipótese foi realizado um levantamento de insectos e um total de 3074 insectos foram capturados durante um ano de amostragem mensal. Dez ordens taxonómicas foram identificadas nesta amostra, sendo Hemiptera a mais abundante (N=2094), e estas foram classificadas em nove famílias. A colpoptera sp. da família Nogodinidae era a mais abundante, representando 56% do número total de insectos amostrados e 23% destas amostras resultaram positivos para o fitoplasma LY por detecção por PCR. A comparação BLAST, RFLP virtual e análises filogenéticas dos amplicons sequenciados relacionam o fitoplasma detectado com o subgrupo 16SrIV-A. Os resultados aqui apresentados sugerem que Colpoptera sp. poderia ser considerado como um novo vector putativo dos fitoplasmas causadores de LY no México e um candidato a investigação adicional.

Abstract Lethal yellowing (LY) is a disease that affects coconut and other palm species. It is associated to phytoplasmas of the group 16SrIV and the only reported insect vector for this pathogen so far is Haplaxius crudus. H. crudus is present in Mexico and has been associated to 16SrIV phytoplasmas, however, it was not detectable during a LY outbreak in the coast of Yucatan, Mexico, suggesting the existence of other vector species. To test this hypothesis a survey of insects was carried out and a total of 3074 insects were captured during a year of monthly sampling. Ten taxonomic orders were identified in this sample, Hemiptera being the most abundant (N=2094), and these were classified into nine families. The leafhopper Colpoptera sp. from to the Nogodinidae family was de most abundant representing 56% of the total number of insects sampled and 23% of these samples resulted positive for LY phytoplasma by PCR detection. The BLAST comparison, virtual RFLP and phylogenetic analyses of the sequenced amplicons relate the detected phytoplasma to the subgroup 16SrIV-A. The findings presented herein suggest that Colpoptera sp. could be considered as a new putative vector of the LY-causing phytoplasmas in Mexico and a candidate for further research.

Resumo O passivo ambiental da mineração gera poluição ambiental. O objetivo do presente estudo foi determinar a produtividade de trevo-branco (Trifolium repens) e capim-dos-pomares (Dactylis glomerata) cultivados em passivos ambientais de mineração adicionando terra preta e composto como substrato na Empresa Buenaventura Julcani Huancavelica. Os tratamentos foram as combinações: 4: 3,1: 3,1: 3:1,1 kg de RP: RP, TN: RP, C: RP, TN, C respectivamente. Foram distribuídos em quatro tratamentos com doze unidades experimentais para cada espécie de leguminosa e gramínea, trabalhou-se segundo o delineamento inteiramente casualizado (DCA) com arranjo fatorial 2 x 4, sendo a unidade experimental um tratamento com doze repetições. As variáveis avaliadas foram: porcentagem de germinação (TG) e porcentagem de sobrevivência do colmo (TST). Para a análise estatística foi utilizado o software SPSS. trevobranco trevo branco Trifolium repens capimdospomares capim dos pomares Dactylis glomerata Huancavelica combinações 4 3,1 31 3 1 31,1 311 1,1 3:1, RP TN respectivamente gramínea trabalhouse trabalhou se DCA (DCA repetições TG (TG TST. TST . (TST) SPSS 3, 31, 11 1, 3:1 (TST 3:

Abstract Mining environmental liabilities generate environmental pollution. The objective of the present study was to determine the yield of white clover (Trifolium repens) and orchard grass (Dactylis glomerata) cultivated in mining environmental passives adding black earth and compost as a substrate in the Buenaventura Julcani Huancavelica Company. The treatments were the combinations: 4: 3.1: 3.1: 3:1.1 kg of RP: RP, TN: RP, C: RP, TN, C respectively. They were distributed in four treatments with twelve experimental units for each species of leguminous and gramineous grass, we worked according to the completely randomized design (DCA) with a 2 x 4 factorial arrangement, the experimental unit being a treatment with twelve repetitions. The variables evaluated were: germination percentage (TG) and stem survival percentage (TST). For the statistical analysis, the SPSS software was used. pollution Trifolium repens Dactylis glomerata Company combinations 3.1 31 3 1 31.1 311 1.1 3:1. RP TN respectively DCA (DCA arrangement repetitions TG (TG TST. TST . (TST) analysis used 3. 31. 11 1. 3:1 (TST 3:

Abstract Objective To identify if there is an association between pelvic entry and pelvic outlet diameters with increased positive circumferential resection margin (CRM) in rectal cancer. Introduction Positive CRMin rectalcancerisa majorpredictor forlocal anddistant recurrence. Pelvic diameters may be related to the difficulty of dissection, as well as intrinsic tumor characteristics such as tumor size, location, distance from the anal margin, and T stage, which may compromise the integrity of the mesorectum and circumferential margin involvement. Methods A retrospective review of the patient’s medical records who underwent surgical resection of rectal adenocarcinoma from January 2012 to June 2022 was performed. The patient’s preoperative staging, operative characteristics, and histopathologic outcomes were gathered from the medical records. Preoperative MRI scanning was done in all patients. MRI pelvimetry was done by two observers. CRM involvement was recorded as stated in the pathology report. Pelvimetry variables were dichotomized according to their mean values for correlation analysis. The odds ratio (OR) was calculated from a binary logistics regression model to assess the relation between the positive CRM and the independent variables. Results A total of 78 patients were included in this study. A positive CRM was reported in 10 patients (12.8%). BMI >27.4 + 6.6 (p = 0.02), positive extramural vascular invasion (p = 0.027), positive CRM by MRI scanning (p = 0.004), and anal sphincter involvement (p = 0.03) were associated with positive CRM. Pelvimetry values were not associated with a positive CRM. Conclusion No association was found between the pelvic diameters measured by MRI pelvimetry with a positive CRM. (CRM cancer recurrence dissection size location stage patient s 201 202 performed staging observers report analysis OR (OR 7 study 1 12.8%. 128 12.8% . 12 8 (12.8%) 274 27 4 >27. 66 6 6. p 0.02, 002 0.02 , 0 02 0.02) 0.027, 0027 0.027 027 0.027) 0.004, 0004 0.004 004 0.004) 0.03 003 03 20 12.8 (12.8% 2 >27 00 0.0 000 0.00 12. (12.8 >2 0. (12. > (12 (1 (

ABSTRACT Objective. This study aimed to evaluate the acquired mcr-1 gene-mediated colistin resistance in Escherichia coli and Salmonella spp. isolates obtained from fecal samples in pigs destined for human consumption at slaughterhouse located in Medellín (Colombia). Materials and methods. A descriptive study was carried out, in which 190 fecal samples were collected from pigs at the slaughterhouse in March 2020. Colistin sulfate-supplemented chromogenic and MacConkey agars were used for the screening of colistin-resistant enterobacteria. The selected isolates were analyzed by PCR to identify the presence of the mcr-1 gene. Bacterial identification and antibiotic susceptibility profile were performed on mcr-1 gene-positive isolates by the automated Microscan® system. The information was collected and analyzed using descriptive statistics. Results. The 70.52% (134/190) of the animals were positive for colistin-resistant isolates by the screening test. The 15.78% (30/190) of the isolates were mcr-1 gene carriers, of which 1.05% (2/190) belong to Salmonella enterica species and 4.21% (8/190) were E. coli. A multiple antibiotics resistance profile (10/10) and an extended-spectrum beta-lactamase (ESBL) -producing E. coli were identified in all the isolates carrying the mcr-1 gene. Most of the pigs with enterobacteria carrying the mcr-1 gene came from farms located in the province of Antioquia, and all belonged to the growing-finishing production stage. Conclusions. This study evidences the circulation of the mcr-1 type gene in pigs at the time of slaughter, representing a potentially serious threat to public health due to possible implications in the food chain.

RESUMEN Objetivo. Evaluar la resistencia adquirida a colistina mediada por el gen mcr-1 en aislados de E. coli y Salmonella spp., de muestras de materia fecal de porcinos con destino a consumo humano en planta de benefício animal de Medellín, Colombia. Materiales y métodos. Se realizó un estudio descriptivo, tomando 190 muestras de materia fecal de porcinos durante marzo del 2020. Para la tamización de enterobacterias resistentes a colistina se utilizó agar cromogénico y MacConkey suplementado con sulfato de colistina (2 mg/l). Los aislados fueron analizados mediante PCR para identificar el gen mcr-1, identificación bacteriana y perfil de susceptibilidad antibiótica a los aislados positivos al gen mcr-1 por el sistema automatizado Microscan®. La información fue registrada y analizada mediante estadística descriptiva. Resultados. La frecuencia de porcinos con aislados resistentes a colistina en la tamización fue del 70.52% (134/190). El 15.78% (30/190) portadores del gen mcr-1 de los cuales el 1.05% (2/190) pertenecieron a la especie Salmonella entérica y el 4.21% (8/190) E. coli. Se identificó en los aislados positivos al gen mcr-1 la capacidad de resistir la acción de múltiples antibióticos (10/10), y una E. coli con la habilidad de producir betalactamasas de espectro extendido (BLEE). La mayoría de los cerdos con enterobacterias portadoras del gen mcr-1 provenían de granjas del departamento de Antioquia, y todos en etapa de levante y ceba. Conclusiones. Este estudio evidencia la circulación del gen mcr-1 en cerdos al sacrificio, representando un riesgo potencial para la salud pública por su posible entrada a la cadena alimentaria.