[First isolation of Acanthamoeba spp. in seawater from the southeast of Buenos Aires (SE, Argentina)]. / Primer aislamiento de Acanthamoeba spp. en agua de mar del sudeste bonaerense, Argentina.

Free-living amoebae (FLA) of the genus Acanthamoeba are ubiquitous and amphizoic protozoa that colonize aquatic and terrestrial habitats and can serve as reservoirs for other microorganisms. They are considered econoses that can cause severe and rare pathologies. Due to limited epidemiological data available, the objective of this study was to investigate the presence of Acanthamoeba in coastal wetlands of the southeast of Buenos Aires province and evaluate their association with bacteriological and environmental variables. From February 2021 to July 2022, 22 seawater samples were collected at different points along the coast of the city of Mar del Plata (Buenos Aires, Argentina). Environmental parameters were determined and physicochemical and bacteriological studies, morphological identification, cultures and molecular typification were conducted. Regardless of the environmental and bacteriological variables, the presence of Acanthamoeba spp. was molecularly confirmed in 54.54% of the samples, being the first report of these protozoa in seawater in Argentina.

Sellado antibiótico de reservorios subcutáneos: estabilidad de soluciones con vancomicina / Antimicrobial lock solutions for implantable central venous devices: stability of vancomycin solutions

Los reservorios subcutáneos son un tipo de catéter venoso central (CVC). Cuando se usan catéteres venosos centrales (CVC), el personal sanitario necesita evitar dos grandes riesgos: formación de coágulos e infecciones bacterianas. Para prevenir y evitar la contaminación de los catéteres en los pacientes hospitalizados y ambulatorios, se han implementado diversas alternativas, como el llamado “sellado antibiótico de catéteres” (SAC). De este modo, se ha sugerido la utilización de soluciones con agentes antimicrobianos, a las que se suelen adicionar sustancias con efecto anticoagulante y/o con efecto antibiofilm. Empero, se requiere que la estabilidad de dichas soluciones sea comprobada mediante técnicas como la cromatografía líquida de alta resolución (HPLC), además de las pruebas de eficacia antimicrobiana, para así poder establecer la seguridad de los pacientes. En este entorno, se plantea el presente trabajo de revisión bibliográfica, con el objetivo de incluir las investigaciones de mayor representación clínica a este respecto, para evidenciar el comportamiento de las soluciones de sellado antibiótico de catéteres en distintas condiciones de almacenamiento y uso. En particular, esta revisión se centra en soluciones con vancomicina. De acuerdo con los estudios consultados, las soluciones de vancomicina con citrato de sodio (agente quelante) son las que presentan las mejores características en cuanto a estabilidad físico-química y eficacia como soluciones de sellado.(AU)

Subcutaneous reservoirs are a type of central venous catheter. When using central venous catheters, healthcare workers need to avoid two major risks: clot formation and bacterial infections. To prevent and avoid catheter contamination in both hospitalized patients and outpatients, several strategies have been carried out, such as the so-called ” antibiotic-based catheter lock solution”. Therefore, it has been suggested to implement the use of solutions with antimicrobial agents, to which anticoagulant and/or antibiofilm substances are often added.However, the stability of such solutions needs to be tested by techniques such as high performance liquid chromatography (HPLC), in addition to antimicrobial efficacy testing, in order to establish patient safety. In consequence, this literature review aims to include the most clinically representative research towards these aspects, to demonstrate the behaviour of antibiotic-based catheter lock solutions under different conditions of storage and use. In particular, this review focuses on solutions containing vancomycin. According to the studies consulted, vancomycin solutions with sodium citrate (chelating agent) present the best stability characteristics in terms of physicochemical properties and efficacy.(AU)

Care burden and outcome of the surgical management of ulcerative colitis: A retrospective analysis of the last 20 years in a tertiary hospital in Spain.

AIM: To analyze the surgical burden of UC care in the last two decades, analyzing the characteristics of the patients, surgical indications along with the short and long-term results. METHOD: Single-center retrospective cohort analysis of UC patients undergoing abdominal and anorectal surgery between January 2000 and December 2020. The care burden, clinical data and results were analyzed according to distribution by decades. RESULTS: 128 patients, 37% female, underwent 376 surgical interventions (296 intestinal procedures and 80 anorectal). Mean follow-up for the cohort was 106±64 months. Timing from diagnosis to first surgery was under 5 years in 53.3%. In the second decade of the study there were fewer operated patients (73 vs. 48) as well as the total number of interventions per patient (2.7 vs. 2.0). The proportion between elective and urgent surgery was reversed in the second decade, observing an increase in laparoscopic surgery (70% vs. 8%) together with a decrease in major postoperative morbidity (Clavien-Dindo≥IIIa) (20% vs 8.4%). 80 patients underwent a restorative proctocolectomy, with a failure of 5% at 1 year but 23.7% in the long term. 37 patients required anorectal surgery, of which 26 (71%) were serial interventions, most due to septic complications of the pouches. CONCLUSIONS: The number of colectomies and interventions per patient decreased in the last decade, while there were improvements in morbidity and surgical approach. The need for sequential surgeries and long-term active instrumental surveillance for possible functional deterioration constitutes a significant clinical burden.

Care burden and outcome of the surgical management of ulcerative colitis: A retrospective analysis of the last 20 years in a tertiary hospital in Spain / Carga asistencial y resultados del tratamiento quirúrgico de la colitis ulcerativa: un análisis retrospectivo de los últimos 20 años en un hospital terciario de España

Aim: To analyze the surgical burden of UC care in the last two decades, analyzing the characteristics of the patients, surgical indications along with the short and long-term results. Method: Single-center retrospective cohort analysis of UC patients undergoing abdominal and anorectal surgery between January 2000 and December 2020. The care burden, clinical data and results were analyzed according to distribution by decades. Results: 128 patients, 37% female, underwent 376 surgical interventions (296 intestinal procedures and 80 anorectal). Mean follow-up for the cohort was 106±64 months. Timing from diagnosis to first surgery was under 5 years in 53.3%. In the second decade of the study there were fewer operated patients (73 vs. 48) as well as the total number of interventions per patient (2.7 vs. 2.0). The proportion between elective and urgent surgery was reversed in the second decade, observing an increase in laparoscopic surgery (70% vs. 8%) together with a decrease in major postoperative morbidity (Clavien-Dindo≥IIIa) (20% vs 8.4%). 80 patients underwent a restorative proctocolectomy, with a failure of 5% at 1 year but 23.7% in the long term. 37 patients required anorectal surgery, of which 26 (71%) were serial interventions, most due to septic complications of the pouches. Conclusions: The number of colectomies and interventions per patient decreased in the last decade, while there were improvements in morbidity and surgical approach. The need for sequential surgeries and long-term active instrumental surveillance for possible functional deterioration constitutes a significant clinical burden. (AU)

Objetivo: Analizar la carga quirúrgica asistencial por CU en 20 años, analizando las características de los pacientes, indicaciones quirúrgicas y resultados a corto y largo plazo. Método: Análisis retrospectivo unicéntrico de pacientes intervenidos de enero del 2000 a diciembre del 2020. La carga asistencial, los datos clínicos y los resultados se analizaron según distribución por décadas. Resultados: Ciento veintiocho pacientes, 37% mujeres, con 376 intervenciones quirúrgicas (296 procedimientos intestinales y 80 anorrectales). El seguimiento medio de la cohorte fue de 106±64 meses. El lapso entre el diagnóstico y la primera cirugía fue <5 años en el 53,3%. En la segunda década del estudio hubo menos pacientes operados (73 frente a 48) y un menor número de intervenciones por paciente (2,7 frente a 2,0). La proporción entre cirugía electiva y urgente se revirtió en la segunda década, observándose un aumento de la cirugía laparoscópica (70% vs. 8%) junto con una disminución de la morbilidad postoperatoria mayor (Clavien-Dindo≥IIIa) (20% vs 8.4%). Se realizó una proctocolectomía restauradora a 80 pacientes, con un fracaso al año del 5% pero del 23,7% a largo plazo. Treinta y siete pacientes requirieron cirugía anorrectal, de los cuales 26 (71%) fueron intervenciones seriadas, la mayoría por complicaciones sépticas de los reservorios. Conclusiones: El número de colectomías y de intervenciones por paciente disminuyó en la última década, a la vez que hubo mejorías en la morbilidad y el abordaje quirúrgico. La necesidad de cirugías secuenciales y de una vigilancia instrumental activa a largo plazo por el posible deterioro funcional constituye una importante carga clínica. (AU)

Care burden and outcome of the surgical management of ulcerative colitis: A retrospective analysis of the last 20 years in a tertiary hospital in Spain / Carga asistencial y resultados del tratamiento quirúrgico de la colitis ulcerativa: un análisis retrospectivo de los últimos 20 años en un hospital terciario de España

Aim: To analyze the surgical burden of UC care in the last two decades, analyzing the characteristics of the patients, surgical indications along with the short and long-term results. Method: Single-center retrospective cohort analysis of UC patients undergoing abdominal and anorectal surgery between January 2000 and December 2020. The care burden, clinical data and results were analyzed according to distribution by decades. Results: 128 patients, 37% female, underwent 376 surgical interventions (296 intestinal procedures and 80 anorectal). Mean follow-up for the cohort was 106±64 months. Timing from diagnosis to first surgery was under 5 years in 53.3%. In the second decade of the study there were fewer operated patients (73 vs. 48) as well as the total number of interventions per patient (2.7 vs. 2.0). The proportion between elective and urgent surgery was reversed in the second decade, observing an increase in laparoscopic surgery (70% vs. 8%) together with a decrease in major postoperative morbidity (Clavien-Dindo≥IIIa) (20% vs 8.4%). 80 patients underwent a restorative proctocolectomy, with a failure of 5% at 1 year but 23.7% in the long term. 37 patients required anorectal surgery, of which 26 (71%) were serial interventions, most due to septic complications of the pouches. Conclusions: The number of colectomies and interventions per patient decreased in the last decade, while there were improvements in morbidity and surgical approach. The need for sequential surgeries and long-term active instrumental surveillance for possible functional deterioration constitutes a significant clinical burden. (AU)

Objetivo: Analizar la carga quirúrgica asistencial por CU en 20 años, analizando las características de los pacientes, indicaciones quirúrgicas y resultados a corto y largo plazo. Método: Análisis retrospectivo unicéntrico de pacientes intervenidos de enero del 2000 a diciembre del 2020. La carga asistencial, los datos clínicos y los resultados se analizaron según distribución por décadas. Resultados: Ciento veintiocho pacientes, 37% mujeres, con 376 intervenciones quirúrgicas (296 procedimientos intestinales y 80 anorrectales). El seguimiento medio de la cohorte fue de 106±64 meses. El lapso entre el diagnóstico y la primera cirugía fue <5 años en el 53,3%. En la segunda década del estudio hubo menos pacientes operados (73 frente a 48) y un menor número de intervenciones por paciente (2,7 frente a 2,0). La proporción entre cirugía electiva y urgente se revirtió en la segunda década, observándose un aumento de la cirugía laparoscópica (70% vs. 8%) junto con una disminución de la morbilidad postoperatoria mayor (Clavien-Dindo≥IIIa) (20% vs 8.4%). Se realizó una proctocolectomía restauradora a 80 pacientes, con un fracaso al año del 5% pero del 23,7% a largo plazo. Treinta y siete pacientes requirieron cirugía anorrectal, de los cuales 26 (71%) fueron intervenciones seriadas, la mayoría por complicaciones sépticas de los reservorios. Conclusiones: El número de colectomías y de intervenciones por paciente disminuyó en la última década, a la vez que hubo mejorías en la morbilidad y el abordaje quirúrgico. La necesidad de cirugías secuenciales y de una vigilancia instrumental activa a largo plazo por el posible deterioro funcional constituye una importante carga clínica. (AU)

Reservoritis secundaria a infección por citomegalovirus: reporte de caso y revisión de la literatura / Pouchitis secondary to cytomegalovirus infection: Case report and literature review

Resumen La proctocolectomía total con reservorio ileal es el procedimiento quirúrgico de elección para la colitis ulcerativa refractaria (CUR) al tratamiento médico y la reservoritis es la complicación más frecuente y puede afectar hasta al 50% de los pacientes en los primeros 5 años del procedimiento. Aunque la etiología no está bien establecida, su presentación podría estar relacionada con disbiosis como resultado de la estasis fecal en individuos genéticamente susceptibles y con una respuesta inmunitaria alterada. Los síntomas típicos de reservoritis como diarrea, dolor abdominal, tenesmo, urgencia, incontinencia fecal y, menos frecuentemente, sangrado rectal no son específicos y el diagnóstico debe confirmarse mediante una evaluación endoscópica e histológica. La infección por citomegalovirus es infrecuente como causa de reservoritis; sin embargo, debe considerarse en pacientes con reservoritis refractaria al manejo antibiótico inicial. Las pruebas diagnósticas incluyen pruebas serológicas como la medición de anticuerpos, antigenemia y proteína C-reactiva (PCR) en sangre. El tratamiento de elección es el ganciclovir, medicamento de administración endovenosa que puede inducir complicaciones graves como mielosupresión, neutropenia y trombocitopenia. Se recomienda el seguimiento endoscópico posterior al tratamiento para asegurar la cicatrización mucosa, especialmente cuando hay sospecha de enfermedad de Crohn o compromiso del asa aferente en la endoscopia inicial.

Abstract Total proctocolectomy with ileal pouch is the surgical procedure of choice for ulcerative colitis refractory to medical treatment, and pouchitis is the most frequent complication. It can affect up to 50% of patients in the first five years of the procedure. Although the etiology is not well established, its manifestation could be related to dysbiosis resulting from fecal stasis in genetically susceptible individuals with altered immune responses. Typical symptoms of pouchitis, such as diarrhea, abdominal pain, tenesmus, urgency, fecal incontinence, and, less commonly, rectal bleeding, are nonspecific, and the diagnosis must be confirmed by endoscopic and histologic examination. Cytomegalovirus infection is an infrequent cause of pouchitis; however, it should be considered in patients with pouchitis refractory to initial antibiotic management. Diagnostic tests include serological tests such as the measurement of antibodies, antigenemia, and C-reactive protein (CRP) in blood. The treatment of choice is ganciclovir, an intravenous drug that can induce severe complications such as myelosuppression, neutropenia, and thrombocytopenia. Post-treatment endoscopic follow-up is recommended to ensure mucosal healing, especially when there is suspicion of Crohn's disease or involvement of the afferent loop on initial endoscopy.

Aislamiento de Acanthamoeba spp. en salas cerradas de un hospital de la provincia de Buenos Aires, Argentina / Isolation of Acanthamoeba spp. in closed rooms of a hospital in Buenos Aires province, Argentina

Resumen Las amebas de vida libre (AVL) son protozoos ubicuos con cuatro géneros patógenos para el ser humano: Acanthamoeba, Naegleria, Balamuthia, y Sappinia. Acanthamoeba puede actuar como reservorio de microorganismos (endosimbiontes), por lo cual, en medio hospitalario, implicaría un riesgo para la transmisión de bacterias, virus y hongos intranosocomiales. Se investigó la presencia de AVL, con énfasis en Acanthamoeba spp., en un hospital pediátrico de la provincia de Buenos Aires, Argentina. Se colectaron 22 muestras de lavamanos e incubadoras en salas de Neonatología y Terapia Intensiva, las que fueron cultivadas a 37 y 42 °C. Los aislados fueron identificados molecularmente. El 63,64% de las muestras presentaron Acanthamoeba spp. Esta investigación representa el primer estudio realizado en la Argentina sobre la detección de Acanthamoeba spp. en salas cerradas de un hospital. Su presencia es una señal de alarma y resulta un blanco útil para investigar posibles reservorios de microorganismos patógenos en ambientes hospitalarios.

Abstract Free-living amoebae (FLA) are ubiquitous protozoa with four pathogenic genera for humans: Acanthamoeba, Naegleria, Balamuthia, and Sappinia. Acanthamoeba can act as a reservoir of microorganisms (endosymbionts), for which reason, in a hospital environment, it would imply a risk for transmission of nosocomial bacteria, viruses and fungi. The presence of AVL, with emphasis on Acanthamoeba spp., was investigated in a pediatric hospital. Twenty-two samples were collected from sinks and incubators in Neonatology and Intensive Care rooms, which were cultured at 37 and 42 °C. The isolates found were molecularly identified. A total of 63.64% of the samples presented Acanthamoeba spp. This research represents the first study in Argentina on the detection of Acanthamoeba spp. in closed rooms of a hospital. Its presence is an alarm signal, and it is a useful target to investigate possible reservoirs of pathogenic microorganisms in hospital environments.

Resumo As amebas de vida livre (AVL) são protozoários ubíquos com quatro gêneros patogênicos para o ser humano: Acanthamoeba, Naegleria, Balamuthia, e Sappinia. Acanthamoeba pode atuar como um reservatório de microrganismos (endossimbiontes), e portanto, em um ambiente hospitalar, representaria um risco de transmissão de bactérias, vírus e fungos intra-nosocomiais. A presença de AVL, com em Acanthamoeba spp. em um hospital pediátrico da província de Buenos Aires, Argentina, foi investigada. Vinte e duas amostras foram coletadas em lavatórios e incubadoras em Salas de Neonatologia e Cuidados Intensivos, cultivadas a 37 e 42 °C. Os isolados foram identificadas molecularmente. Foram encontradas Acanthamoeba spp. em 63,64% das amostras. Esta investigação representa o primeiro estudo realizado na Argentina sobre a detecção de Acanthamoeba spp. em salas fechadas de um hospital. A sua presença é um sinal de alarme e um alvo para investigar possíveis reservatórios de microrganismos patogênicos em ambientes hospitalares.

Inflatable penile prosthesis reservoir placement—Are we ready for a paradigm change? / Colocación de reservorio para prótesis de pene inflables: ¿estamos preparados para un cambio de paradigma?

In 2002, Steve Wilson pioneered new procedures for alternative placement of reservoirs for inflatable prostheses in patients who have suffered damage to the space of Retzius following pelvic surgery or obliteration of the transversalis fascia by mesh hernia repair. Since then, surgical techniques and tools for ectopic reservoir placement have gradually gained acceptance to minimize palpability, and the risk of visceral and vascular lesions for high risk patients has been all but eliminated. Lockout valves and high submuscular placement techniques are now recommended, and reports of vascular, bowel or bladder injuries are uncommonly rare. While surgeons continue their search for safer and more effective placement methods, new skills and instruments are constantly being introduced to make recommendations to minimize complications and provide safety and functionality. Additional studies and comparisons of techniques are needed to achieve a consensus of best practice for reservoir placement solutions. (AU)

En 2002, Steve Wilson fue el precursor de nuevos procedimientos para la colocación alternativa de reservorios para prótesis inflables en los pacientes que habían sufrido daños en el espacio de Retzius tras cirugía pélvica u obliteración de la fascia transversalis por reparación de hernia con malla. Desde entonces, han ido ganando aceptación las técnicas y herramientas quirúrgicas para colocación de reservorio ectópico, a fin de minimizar la palpabilidad, habiéndose eliminado prácticamente el riesgo de lesiones viscerales y vasculares para pacientes de alto riesgo. Hoy en día se recomiendan las válvulas de bloqueo y las técnicas de colocación submuscular alta, siendo excepcionalmente raros los informes sobre lesiones a nivel vascular, intestinal o en la vejiga. A pesar de que los cirujanos siguen investigando en busca de métodos de colocación más seguros y efectivos, se están introduciendo constantemente nuevas competencias e instrumentos en aras de realizar recomendaciones para minimizar las complicaciones y aportar seguridad y funcionalidad. Son necesarios más estudios y comparaciones sobre técnicas para lograr un consenso acerca de la mejor práctica sobre soluciones de colocación de reservorios. (AU)

Inflatable penile prosthesis reservoir placement-Are we ready for a paradigm change?

In 2002, Steve Wilson pioneered new procedures for alternative placement of reservoirs for inflatable prostheses in patients who have suffered damage to the space of Retzius following pelvic surgery or obliteration of the transversalis fascia by mesh hernia repair. Since then, surgical techniques and tools for ectopic reservoir placement have gradually gained acceptance to minimize palpability, and the risk of visceral and vascular lesions for high risk patients has been all but eliminated. Lockout valves and high submuscular placement techniques are now recommended, and reports of vascular, bowel or bladder injuries are uncommonly rare. While surgeons continue their search for safer and more effective placement methods, new skills and instruments are constantly being introduced to make recommendations to minimize complications and provide safety and functionality. Additional studies and comparisons of techniques are needed to achieve a consensus of best practice for reservoir placement solutions.

Enterobacterales productores de carbapenemasas en sifones de lavamanos de una Unidad de Paciente Crítico

Resumen Introducción: Enterobacterales productores de carbapenemasas (EPC) son una importante causa de infecciones asociadas a la atención en salud (IAAS). El principal reservorio de EPC lo constituyen pacientes infectados y colonizados, sin embargo, también se han identificado reservorios ambientales. Objetivo: Detectar la presencia de EPC en los sifones de lavamanos de la unidad de cuidados críticos de pacientes quemados adultos (UPC QMD) y unidad de cuidados críticos de pacientes pediátricos crónicos (UCEP). Método: Se recolectaron cuatro muestras de sifones de los lavamanos ubicados en el interior de las unidades de pacientes en UCEP y 10 de UPC QMD. A las muestras se les realizó estudio fenotípico y molecular para detección de carbapenemasas en el Instituto de Salud Pública de Chile. Resultados: En los sifones estudiados de UCEP no se aislaron cepas de EPC. En UPC QMD, 50% de los sifones estudiados se aislaron cepas de EPC. Conclusiones: En UPC QMD se objetivó la presencia de EPC en una alta proporción de los sifones de lavamanos testeados, lo que demuestra un reservorio ambiental de bacterias multi-resistentes.

Abstract Introduction: Carbapenemase-producing Enterobacterales (CPE) are an important cause of health care associated infections (HAI). The main reservoir is constituted by infected and colonized patients; however, environmental reservoirs have also been identified. Objective: To detect the presence of CPE in the sink traps of the critical care unit for adult burn patients (UPC QMD) and the critical care unit for chronic pediatric patients (UCEP). Material and Method: Four samples of trap were collected from the sinks located inside the patient units at PICU and 10 at UPC QMD. The samples underwent a phenotypic and molecular study for the detection of carbapenemases at the Institute of Public Health of Chile. Results: In the UCEP no EPC strains were isolated. In UPC QMD, CPE was detected in 50% of the traps. Conclusions: In UPC QMD, the presence of CPE was observed in a high proportion of the tested sinks traps, which shows an environmental reservoir of multi-resistant bacteria.

Fiebre hemorrágica Chapare: una enfermedad zoonótica emergente producto de la expansión agrícola / Chapare hemorrhagic fever: an emerging zoonotic disease as a result of agricultural expansion

Chapare hemorrhagic fever is an emerging zoonotic disease caused by a Mammarenavirus, of the Arenaviridae family, called Chapare virus. Its name refers to the region in which it first appeared. This virus is transmitted through direct contact with the excreta of wild rodents that interact with humans by invading homes close to a rural area and when humans enter the jungle for various reasons such as agriculture and tourism, among others. This virus has been classified by the World Health Organization as biosafety level IV, where pathogens with the highest risk for humans are included and for which there are no vaccines available. It produces a febrile and hemorrhagic picture that leads to death two weeks after the onset of symptoms. There is no vaccine or standardized treatment to treat this disease. The bio ecological aspects of the reservoir are not known, nor are the factors that could be related to the emergency in the area. An investigation should be carried out focused mainly on knowing the circulation of the Chapare virus in the Bolivian tropics, knowing the bioecological characteristics of the reservoir to produce and contribute with reliable information for the design of future surveillance and control strategies with community participation, as well as to strengthen laboratory diagnostic capacities in health establishments in the municipality of Villa Tunari.

La fiebre hemorrágica Chapare es una enfermedad zoonótica emergente causada por un Mammarenavirus de la familia Arenaviridae, llamado virus Chapare; su nombre se debe a la región en la cual apareció por primera vez. Este virus es transmitido por medio del contacto directo con las excretas de los roedores silvestres que interactúan con el ser humano, al invadir las viviendas que se encuentran cercanas al área silvestre y cuando el hombre incursiona a la selva por diversas razones, como las actividades de agricultura o turismo, entre otras. Este virus ha sido catalogado por la Organización Mundial de la Salud como nivel de bioseguridad IV, en el cual se ubican los patógenos de mayor riesgo para el ser humano y para los cuales no existen vacunas disponibles. Produce un cuadro febril y hemorrágico que lleva al fallecimiento a las dos semanas de haber iniciado los síntomas. No existe vacuna ni tratamiento estandarizado para tratar esta enfermedad, no se conocen los aspectos bioecológicos del reservorio y tampoco los factores que podrían estar relacionados con la emergencia en la zona. Se deberá realizar una investigación enfocada principalmente en conocer la circulación del virus Chapare en la región del trópico boliviano, conocer las características bioecológicas del reservorio con el propósito de producir y aportar con información fehaciente para el diseño de futuras estrategias de vigilancia y control con participación comunitaria, así como fortalecer las capacidades de diagnóstico de laboratorio en los establecimientos de salud del municipio de Villa Tunari.

Care burden and outcome of the surgical management of ulcerative colitis: A retrospective analysis of the last 20 years in a tertiary hospital in Spain.

AIM: To analyze the surgical burden of UC care in the last two decades, analyzing the characteristics of the patients, surgical indications along with the short and long-term results. METHOD: Single-center retrospective cohort analysis of UC patients undergoing abdominal and anorectal surgery between January 2000 and December 2020. The care burden, clinical data and results were analyzed according to distribution by decades. RESULTS: 128 patients, 37% female, underwent 376 surgical interventions (296 intestinal procedures and 80 anorectal). Mean follow-up for the cohort was 106±64 months. Timing from diagnosis to first surgery was under 5 years in 53.3%. In the second decade of the study there were fewer operated patients (73 vs. 48) as well as the total number of interventions per patient (2.7 vs. 2.0). The proportion between elective and urgent surgery was reversed in the second decade, observing an increase in laparoscopic surgery (70% vs. 8%) together with a decrease in major postoperative morbidity (Clavien-Dindo≥IIIa) (20% vs 8.4%). 80 patients underwent a restorative proctocolectomy, with a failure of 5% at 1 year but 23.7% in the long term. 37 patients required anorectal surgery, of which 26 (71%) were serial interventions, most due to septic complications of the pouches. CONCLUSIONS: The number of colectomies and interventions per patient decreased in the last decade, while there were improvements in morbidity and surgical approach. The need for sequential surgeries and long-term active instrumental surveillance for possible functional deterioration constitutes a significant clinical burden.

Resultados clínicos y quirúrgicos del tratamiento de craneofaringiomas en pediatría / Clinical and surgical results of the treatment of craniopharyngiomas in pediatrics

Introducción: Los craneofaringiomas son tumores benignos frecuentes en pediatría. La cirugía resectiva solía ser el tratamiento de elección. Sin embargo, en los últimos años se encuentra muy cuestionada debido a su elevada morbilidad. El objetivo primario de este trabajo es presentar los resultados clínicos y quirúrgicos de la cirugía resectiva de craneofaringiomas por vía transcraneal en nuestra institución. El objetivo secundario es presentar una serie de casos en los que se realizó un tratamiento quirúrgico conservador utilizando un reservorio de Ommaya para tratamiento del componente quístico. Métodos: Estudio descriptivo de una serie de casos que compara evaluaciones clínicas e imagenológicas pre y postoperatoria en pacientes sometidos a cirugía resectiva de craneofaringioma. Además, se presenta una serie de casos de pacientes con craneofaringiomas predominantemente quísticos tratados con colocación de catéter de Ommaya intraquístico e Interferón. Resultados: Se analizaron 33 pacientes con craneofaringioma sometidos a resección quirúrgica. Al año de la cirugía, encontramos que el 51.52% de los casos (17 pacientes) se mantuvo sin crecimiento de la lesión y que el 48.48% (16 pacientes) presentó aumento o recidiva. En el postoperatorio todas las evaluaciones clínicas empeoraron. Fueron estadísticamente significativas la aparición de diabetes insípida (18.18% vs. 69.70%; p=0.04), obesidad (12.12% vs. 36.36%; p=0.005) y talla baja (33.33% vs. 57.58%; p=0.0006). En los tratados con Ommaya e Interferón, el 28.57% (2 casos) presentó reducción o estabilidad en el quiste y el 71.43% (5 casos) aumentó el tamaño, aunque presentó mejores resultados respecto a la restricción de la talla y obesidad. Conclusión: La exéresis quirúrgica de los craneofaringiomas genera una alta tasa de comorbilidades sumado a un porcentaje elevado de recidiva. El manejo conservador tratando el componente quístico en los casos en los que sea posible podría ser una opción viable. El tratamiento de los craneofaringiomas de la infancia debe abordarse de forma multidisciplinaria intentando preservar el bienestar y la calidad de vida de los pacientes

Introduction: Craniopharyngioma is a common benign tumor in children. Although surgery has traditionally been the treatment of choice, it has been controversial in recent years due to the associated high morbidity. The main aim of this paper is to present the clinical and surgical outcomes seen after craniopharyngioma resection in our institution. The secondary objective is to present a case series of patients treated with an Ommaya reservoir (OR) and interferon. Methods: This was a descriptive study comparing the pre and post-surgical clinical and image assessment in patients undergoing craniopharyngioma resection. Also, a case series including patients with craniopharyngioma managed with an Ommaya reservoir (OR) and Interpheron was included. Results: Thirty-three patients with craniopharyngioma undergoing surgical resection were assessed. We found no tumor growth in 51.52% (17) of the cases, and either tumor growth or recurrence in 48.48% of the cases at one year. Clinical worsening was observed in the post-operative period; the presence of diabetes insipidus (18.18% vs. 69.70%; p=0.04), obesity (12.12% vs. 36.36%; p=0.005) and short stature (33.33% vs. 57.58%; p=0.0006) were statistically significant. Of the patients treated with an OR and interferon, 28.57% (2) presented tumor cyst regression or stability, and 71.43% exhibited tumor cyst growth. Conclusion: The surgical resection of craniopharyngiomas is associated with a high recurrence rate and usually high mortality. A multidisciplinary management of craniopharyngiomas in childhood is advisable in order to preserve the wellbeing and quality of life of patients

Prevalencia de especies zoonóticas de Arcobacter en cerdos a nivel de matadero en Ecuador / Prevalence of zoonotic Arcobacter species in pigs at slaughterhouse level in Ecuador

RESUMEN Objetivo. Se pretende determinar la prevalencia, la diversidad y la resistencia antimicrobiana de las cuatro especies zoonóticas de Arcobacter en cerdos sanos, a nivel de matadero. Materiales y métodos. Fueron recolectadas, mediante muestreo no probabilístico por conveniencia, 50 muestras fecales obtenidas por hisopado rectal de cerdos sanos a nivel de matadero, antes de su faenamiento. El aislamiento de las cepas de Arcobacter fue realizado por métodos microbiológicos, utilizando enriquecimiento selectivo en caldo y filtración pasiva, mientras que para la identificación de especie fueron utilizadas pruebas bioquímicas y moleculares (multiplex PCR). El comportamiento frente a los antimicrobianos fue determinado por el método de disco difusión. Resultados. Fueron aisladas las cuatro especies zoonóticas, las cuales presentaron las siguientes frecuencias de aislamiento: A. thereius (18.0%), A. skirrowii (18.0%), A. cryaerophilus (6.0%) y A. butzleri (2.0%). Se encontró alta frecuencia de resistencia a ciprofloxacina y en las cuatro especies fueron aisladas cepas multirresistentes (resistentes a más de tres antibióticos).

ABSTRACT Objective. To establish the prevalence, diversity and antimicrobial resistance of the zoonotic species of Arcobacter in healthy pigs at slaughterhouse level. Material and methods. Fifty fecal samples were taken by rectal swabs from healthy pigs, before the beginning of the slaughter at the slaughterhouse of Loja city, Southern Ecuador. Sampling was done by means of a non-probabilistic method for convenience. Isolation of Arcobacter strains was done by microbiological methods and species identification using biochemical and molecular (multiplex PCR) tests. Antimicrobial behavior was performed using the disk diffusion method. Results. The four zoonotic species of Arcobacter were found. The isolation rates were A. thereius (18.0%), A. skirrowii (18.0%), A. cryaerophilus (6.0%) and A. butzleri (2.0%). High resistance to ciprofloxacin was found and multi-resistant strains were isolated from these four species. Conclusions. The fecal carriage of the zoonotic species of Arcobacter was demonstrated in pigs at slaughterhouse level. These species showed high resistance to ciprofloxacin being isolated muti-resistant strains among these four species.

Penile prosthesis surgery: Indications and penoscrotal approach. / Implante de prótesis peneana: indicaciones y abordaje penoescrotal.

Inflatable penile prosthesis was developed in 1973 as a definitive treatment for erectile dysfunction. Since then these prosthetic devices underwent huge modifications, and scientific and technologic advances were accomplished, improving reliability, longevity and the surgical outcomes. Surgical implantation of a penile prosthesis may be considered in patients with erectile dysfunction who do not respond to pharmacotherapy or who prefer a permanent solution to their problem. According to the 2019 EAU Guidelines, regardless of the indication, prosthesis implantation has one of the highest satisfaction rates (92-100% in patients and 91-95% in partners) among the treatment options for erectile dysfunction based on appropriate consultation. The penoscrotal handling is the most common approach accounting for >80% of inflatable penile prosthesis placed worldwide. Most frequent complaints and dissatisfaction with inflatable penile prosthesis are related to technical issues or poor surgical outcomes such as the final length of the penis. There is an urgent need to improve the patient awareness in inflatable penile prosthesis in the preoperative arena, including the high expectation management, and an effort to select the proper patients for definitive treatment.

Efecto del patrón de flujo sobre las pérdidas de presión para flujo bifásico a través de lechos porosos bajo perspectiva fractal / Flow pattern effect on the pressure drop of biphasic flow through porous media from a fractal dimension perspective

Resumen La descripción del comportamiento de un flujo bifásico, a través de lechos porosos, por medio de modelos, basados en las ecuaciones de fenómenos de transporte, se dificulta debido a la irregularidad geométrica de los canales que se forman entre las partículas sólidas que constituyen el lecho. Los modelos deterministas desarrollados para flujos monofásicos requieren del ajuste de constantes empíricas y no pueden extrapolarse a flujos bifásicos, donde el patrón de flujo generado en el sistema influye significativamente sobre el comportamiento del flujo total y las pérdidas de presión por fricción. Por lo anterior, en este trabajo se presenta un modelo para describir el comportamiento del flujo bifásico en función del patrón de flujo y de la morfología, las dimensiones y las condiciones de operación del lecho poroso, cuya obtención se basó en un formalismo, empleando conjuntamente las ecuaciones de conservación de la cantidad de movimiento, la geometría fractal y el cálculo diferencial fraccional. El modelo predice que, para una misma composición del flujo bifásico, el patrón de flujo influye significativamente sobre las pérdidas de presión por fricción, habiendo un incremento cuando una de las fases se encuentra dispersa en el seno de la otra. Por otro lado, el incremento de la dimensión fractal de los poros causa a su vez un incremento de las pérdidas de presión por fricción. El modelo presenta limitaciones asociadas a las consideraciones establecidas durante su obtención, de tal manera que sólo es válido cuando los efectos de la tensión superficial son más significativos que los gravitatorios, despreciándose los efectos de esos últimos sobre el patrón de flujo, así como para el estado estacionario.

Abstract The description of the behavior of a biphasic flow through porous beds by means of models based on the equations of transport phenomena is made difficult due to the geometric irregularity of the channels that are formed between the solid particles that make up the bed. Deterministic models developed for single-phase flows require the adjustment of empirical constants and cannot be extrapolated to biphasic flows, where the flow pattern generated in the system significantly influences the behavior of the total flow and the frictional pressure losses. Therefore, in this paper, we present a model to describe the behavior of the biphasic flow in relation to the flow pattern and the morphology, dimensions, and operating conditions of the porous bed, whose obtainment was based on a hierarchy that used the equations for conservation of momentum, fractal geometry and fractional differential calculus jointly. The model predicts that, for the same composition of the biphasic flow, the flow pattern significantly influences friction pressure losses, with an increase when one of the phases is dispersed within the other. On the other hand, the increase in the fractal dimension of the pores, in turn, causes an increase in pressure loss due to friction. The model has limitations associated with the considerations established during its collection, since it is only valid when the effects of surface tension are more significant than the gravitational effects, the effects of the latter being disregarded on the flow pattern, as well as for the stationary state.

Three-piece inflatable penile prosthesis: Ectopic reservoir placement. / Prótesis de pene inflable de 3 componentes: emplazamiento ectópico del reservorio.

INTRODUCTION: The complications associated to the placement of the reservoir are infrequent but potentially serious. Therefore, technical alternatives have been developed for the performance of the procedure in different locations (ectopic). The aim of this review is to revise the evidence available on the different options for the ectopic placement of the reservoir. MATERIAL AND METHOD: Narrative review based on a bibliographical search limited to PubMed- indexed relevant manuscripts, in Spanish or English, for the period 2000-2019, using «penile prosthesis¼, «ectopic reservoir¼, radical prostatectomy¼, «radical cystectomy¼, «pelvic radiotherapy¼, and «renal transplantation¼ as key words. Non original articles and reviews were not considered eligible. A total of 11 manuscripts were included. RESULTS: Pelvic alterations after surgery and/or radiotherapy increase the difficulty in the placement of the prosthesis reservoir. In order to minimize the risk of complications, different modifications have been performed on the devices, and technical innovations have been developed for the submuscular placement of the reservoir. The available evidence regarding the functionality and complications of these techniques is limited to single institution, low volume, and retrospective series with short follow-up periods. The functionality seems to be adequate using the adapted devices. The complications are infrequent and mild in severity. CONCLUSIONS: Although the available evidence is still limited, the ectopic placement of the reservoir may be considered a safe, effective, and reproducible technique. In addition, it may result particularly useful in cases of altered pelvic anatomy.

La vesícula biliar como reservorio y protectora del tracto digestivo / The gallbladder as reservoir and protector of the digestive tract

Introducción: Estudios anatomofisiológicos y biomoleculares de la vesícula biliar han permitido redefinir su función no solo como reservorio de la secreción biliar, sino como protectora intestinal, concepto que se fundamenta en su capacidad de control de la bioactividad y la toxicología de los ácidos biliares, el metabolismo del colesterol, los fosfolípidos y otros componentes de la secreción hepatobiliar. Objetivo: Describir las actualidades de la funcionabilidad de la vesícula biliar como reservorio y protectora del tracto digestivo dirigido a que cirujanos generales, gastroenterólogos, clínicos y fisiólogos amplíen sus conocimientos sobre la función de la vesícula biliar. Métodos: Se realiza una revisión crítica de las funciones de la vesícula biliar que favorecen mantener la integridad de la pared intestinal. Conclusión: La descripción actualizada de la funcionabilidad de la vesícula biliar ofrece un resultado relevante dentro del marco conceptual en relación a su función protectora que se traduce en el mantenimiento de la integridad del epitelio y la microbiota intestinal(AU)

Introduction: Anatomic-physiological and biomolecular studies of the gallbladder have made it possible to redefine its function not only as a reservoir for bile secretion, but also as intestinal protector. This concept is supported by its capacity to control the bioactivity and toxicology of bile acids, cholesterol metabolism, phospholipids and other components of hepatobiliary secretion. Objective: Present an update on the role of the gallbladder as reservoir and protector of the digestive tract intended for general surgeons, gastroenterologists, clinicians and physiologists to broaden their knowledge about the functions of the gallbladder. Methods: A critical review was conducted of the functions of the gallbladder which facilitate maintenance of the integrity of the intestinal wall. Conclusion: The updated description of the functions of the gallbladder is a relevant contribution to the conceptual framework of its protective function, which ensures the maintenance of the integrity of the epithelium and the intestinal microbiota(AU)

Experience, complications and prognostic factors of the ileoanal pouch in ulcerative colitis: An observational study. / Experiencia, complicaciones y factores pronósticos con el reservorio anal en la colitis ulcerosa. Estudio observacional.

INTRODUCTION: Ileoanal pouch following restorative proctocolectomy is the treatment for ulcerative colitis after failed medical treatment. Our main aim was to evaluate early and late morbidity associated with restorative proctocolectomy. The secondary aim was to assess risk factors for pouch failure. METHODS: A retrospective, observational, single-center study was performed. Patients who had undergone restorative proctocolectomy for a preoperative diagnosis of ulcerative colitis from 1983-2015 were included. Early (<30 days) and late (>30 days) adverse events were analyzed. Pouch failure was defined as the need for pouch excision or when ileostomy closure could not be performed. Univariate and multivariate analyses were performed to assess pouch failure risk factors. RESULTS: The study included 139 patients. One patient subsequently died in the early postoperative period. Mean follow-up was 23 years. Manual anastomoses were performed in 54 patients (39%). Early adverse events were found in 44 patients (32%), 15 of which (11%) had anastomotic fistula. Late adverse events were found in 90 patients (65%), and pouch-related fistulae (29%) were the most commonly found in this group. Pouch failure was identified in 42 patients (32%). In the multivariate analysis, age >50 years (p<0.01; HR: 5.55), handsewn anastomosis (p<0.01; HR: 3.78), pouch-vaginal (p=0.02; HR: 2.86), pelvic (p<0.01; HR: 5.17) and cutaneous p=0.01; HR: 3.01) fistulae were the main pouch failure risk factors. CONCLUSION: Restorative proctocolectomy for a preoperative diagnosis of ulcerative colitis has high morbidity rates. Long-term outcomes could be improved if risk factors for failure are avoided.