Prevalencia de legionella en instalaciones de suministro de agua en España: revisión sistemática y meta-análisis / Prevalence of legionella species in water supply facilities of Spain: a systematic review and meta-analysis

Antecedentes: Las especies de Legionella tienen su hábitat natural o reservorio primario en las aguas dulces superficiales de lagos, ríos, estanques y aguas termales, desde donde a través de los sistemas de suministro colonizan el agua de consumo. El presente estudio pretende investigar la prevalencia de Legionella en instalaciones de agua de consumo de España. Métodos: Se realizó una revisión sistemática mediante la búsqueda en bases de datos electrónicas de información científica de estudios observacionales sobre contaminación de agua de consumo por Legionella, con resultados de análisis de muestras de agua obtenidos entre enero de 2001 y abril de 2021. Se efectuó meta-análisis mediante el software MetaXL© en la hoja de cálculo Microsoft Excel. Resultados: Se seleccionaron un total de 21 estudios. La prevalencia de Legionella en España fue de 21,8 % (IC 95 %: 15,0-29,6). La especie más comúnmente aislada fue L. pneumophila serogrupos 2-15 (44,4 %, IC 95 %: 29,5-59,8). Los valores más altos se hallaron en puntos terminales de las redes de agua caliente sanitaria (31,7 %, IC 95 %: 21,6-42,9), y en las comunidades autónomas de Aragón (24,7 %, IC 95 %: 8,8-44,9) y Cataluña (21,3 %, IC 95%: 4,4-44,8).Conclusiones: La prevalencia global de Legionella obtenida puede compararse con los estudios de otros autores, siendo en líneas generales cercana a la obtenida a nivel mundial, con variaciones en relación a otros países. Las instalaciones con mayor prevalencia han resultado ser las de mayor riesgo de proliferación y dispersión de la bacteria según la normativa vigente, y aquellas situadas en la mitad oriental de España.(AU)

Background: Legionella species have their natural habitat or primary reservoir in the fresh surface waters of lakes, rivers, ponds and hot springs, from where they colonize drinking water through supply systems. The present study aims to investigate the prevalence of Legionella in drinking water facilities in Spain.Methods: A systematic review was performed by searching in electronic databases of scientific information for observational studies on contamination of drinking water by Legionella, with results of analysis of water samples obtained between January 2001 and April 2021. Meta-analysis was carried out using the MetaXL© software in the Microsoft Excel spreadsheet. Results: A total of 21 studies were selected. The prevalence of Legionella in Spain was 21.8 % (95 % CI: 15.0-29.6). The most commonly isolated species were L. pneumophila serogroups 2-15 (44.4 %, 95 % CI: 29.5-59.8). The highest values were found at terminal points of the sanitary hot water networks (31.7 %, 95 % CI: 21.6-42.9), and in the autonomous regions of Aragon (24.7 %, 95 % CI: 8.8-44.9) and Catalonia (21.3 %, 95 % CI: 4.4-44.8). Conclusions: The overall prevalence of Legionella obtained can be compared to studies performed by other authors, being in general terms close to that obtained worldwide, with variations in relation to other countries. The facilities with the highest prevalence have turned out to be those with the highest risk of proliferation and dispersal of the bacteria according to current regulations, and those located in the eastern half of Spain.(AU)

Cigarette smoke induces pulmonary arterial dysfunction through an imbalance in the redox status of the soluble guanylyl cyclase.

Chronic obstructive pulmonary disease (COPD), whose main risk factor is cigarette smoking (CS), is one of the most common diseases globally. Some COPD patients also develop pulmonary hypertension (PH), a severe complication that leads to premature death. Evidence suggests reactive oxygen species (ROS) involvement in COPD and PH, especially regarding pulmonary artery smooth muscle cells (PASMC) dysfunction. However, the effects of CS-driven oxidative stress on the pulmonary vasculature are not completely understood. Herein we provide evidence on the effects of CS extract (CSE) exposure on PASMC regarding ROS production, antioxidant response and its consequences on vascular tone dysregulation. Our results indicate that CSE exposure promotes mitochondrial fission, mitochondrial membrane depolarization and increased mitochondrial superoxide levels. However, this superoxide increase did not parallel a counterbalancing antioxidant response in human pulmonary artery (PA) cells. Interestingly, the mitochondrial superoxide scavenger mitoTEMPO reduced mitochondrial fission and membrane potential depolarization caused by CSE. As we have previously shown, CSE reduces PA vasoconstriction and vasodilation. In this respect, mitoTEMPO prevented the impaired nitric oxide-mediated vasodilation, while vasoconstriction remained reduced. Finally, we observed a CSE-driven downregulation of the Cyb5R3 enzyme, which prevents soluble guanylyl cyclase oxidation in PASMC. This might explain the CSE-mediated decrease in PA vasodilation. These results provide evidence that there might be a connection between mitochondrial ROS and altered vasodilation responses in PH secondary to COPD, and strongly support the potential of antioxidant strategies specifically targeting mitochondria as a new therapy for these diseases.

Vertebral fractures are increased in rheumatoid arthritis despite recent therapeutic advances: a case-control study.

Prevalence and risk factors of vertebral fractures in postmenopausal RA women were assessed in 323 patients and compared with 660 age-matched women. Of patients, 24.15% had at least one vertebral fracture vs.16.06% of controls. Age, glucocorticoids and falls were the main fracture risks. Vertebral fractures were associated with disease severity. INTRODUCTION: There is little quality data on the updated prevalence of fractures in rheumatoid arthritis (RA) that may have changed due to advances in the therapeutic strategy in recent years. This study was aimed at analysing the prevalence and risk factors of vertebral fractures in postmenopausal women with RA and comparing it with that of the general population. METHODS: We included 323 postmenopausal women diagnosed with RA from 19 Spanish Rheumatology Departments, randomly selected and recruited in 2018. Lateral radiographs of the thoracic and lumbar spine were obtained to evaluate morphometric vertebral fractures and the spinal deformity index. We analysed subject characteristics, factors related to RA, and fracture risk factors. The control group consisted of 660 age-matched Spanish postmenopausal women from the population-based Camargo cohort. RESULTS: Seventy-eight (24.15%) RA patients had at least one vertebral fracture. RA patients had increased fracture risk compared with controls (106 of 660, 16.06%) (p = 0.02). Logistic regression analysis showed that age (OR 2.17; 95% CI 1.27-4.00), glucocorticoids (OR 3.83; 95% CI 1.32-14.09) and falls (OR 3.57; 95% CI 1.91-6.86) were the independent predictors of vertebral fractures in RA patients. The subgroup with vertebral fractures had higher disease activity (DAS28: 3.15 vs. 2.78, p = 0.038) and disability (HAQ: 0.96 vs. 0.63, p = 0.049), as compared with those without vertebral fractures. CONCLUSION: The risk of vertebral fracture in RA is still high in recent years, when compared with the general population. The key determinants of fracture risk are age, glucocorticoids and falls. Patients with vertebral fractures have a more severe RA.

Family history of ochronotic arthropathy.

Alkaptonuria is a rare autosomal-recessive disorder that produces accumulation of homogentisic acid in body fluids. The accumulation in collagen tissues, mainly in the joint cartilage, produces ochronotic arthropathy. We report two clinical cases of one brother and sister with alkaptonuria and ochronotic arthropathy diagnosed in old age. In the first case, the patient is diagnosed by musculoskeletal involvement with long-term low back pain with other associated manifestations that made this pathology suspected. In the second case, the patient comes due to osteoporosis and other associated fractures and with the family history and the rest of the clinic, the appropriate complementary tests were performed and the diagnosis is established. It is unknown if there is consanguinity in these patients between parents or ancestors. It is an infrequent pathology that is often diagnosed intraoperatively. Despite the poor efficacy of medical treatment, it would be advisable to make an early diagnosis to avoid accumulation of the pigment and accelerated joint destruction and deposition in other locations. Owing to its prevalence, it is difficult to find a significant number of patients to search for new treatments that are intended to correct the enzyme deficit and not only to modify the elimination.

Crystalglobulinemia manifested as acute renal failure and thrombotic vasculopathy.

Crystalglobulinemia is an extremely rare pathology that is associated in most cases with plasma cell dyscrasia, mainly multiple myeloma. In most cases, it may be the manifestation of incipient gammopathy or it manifests shortly after diagnosis. We report a patient with ischemic lesions of thrombotic origin in lower limbs. Subsequently, renal involvement occurs, in view of this involvement, it is suspected that the patient may have an associated vasculitis. After performing the biopsy and with the subsequent diagnosis of monoclonal gammopathy of uncertain significance, the diagnosis is made. We review the most recent bibliography of patients who have been diagnosed with crystalglobulinemia associated with plasma dyscrasia focusing in those with thrombotic vasculopathy or acute renal failure. In our case, in addition to being associated with monoclonal gammopathy of undetermined significance that is less frequent, the debut of the symptoms is years before the detection of the monoclonal peak. This could speak of patients with a low peak of monoclonal component (not detected by immunoelectrophoresis) who could have kidney and vascular damage.

Control de una endemia de Acinetobacter baumannii multirresistente en la UCI. Recordando lo obvio / Control of an Acinetobacter baumannii multidrug resistance endemic in the ICU. Recalling the obvious

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Impacto de la instauración de un protocolo de actuación clínica ante el dolor abdominal en urgencias pediátricas / Impact of establishment of a clinical protocol for abdominal pain in pediatric emergencies

Objetivos: En enero de 2013 se implantó un protocolo de actuación para el manejo del dolor abdominal en el servicio de urgencias de pediatría, que pretendía reducir la realización de radiografías de abdomen no indicadas, disminuir la administración de enemas no indicados y aplicar una pauta de analgesia mayor. Se ha revisado el impacto del protocolo sobre la modificación de la práctica clínica y si estas variaciones se mantienen. Material y métodos: Estudio observacional, descriptivo, analítico y retrospectivo, realizado en 684 pacientes que acudieron al servicio de urgencias por presentar dolor abdominal de causa aparentemente no orgánica, distribuidos en cuatro periodos: diciembre de 2012 (P1), febrero de 2013 (P2), noviembre de 2013 (P3) y mayo de 2015 (P4). Se han recogido los datos sobre las pruebas diagnósticas realizadas y los tratamientos empleados en estos pacientes. Resultados: Radiografía abdominal: P1= 14,7%, P2= 6,9%, P3= 1,8%, P4= 0% (p <0,01); pacientes con estreñimiento: P1= 23,4%, P2= 13,5%, P3= 0%, P4= 0% (p= 0,001). Ecografía abdominal: P1= 11%, P2= 12,5%, P3= 9,4%, P4= 10,1% (p >0,05). Administración de enema en el servicio de urgencias: P1= 21,5%, P2= 8,3%, P3= 17,1%, P4= 11,7% (p= 0,005); pacientes con estreñimiento: P1= 51,1%, P2= 21,6%, P3= 31,3%, P4= 32,5% (p= 0,036). Tratamiento con polietilenglicol: P1= 4,3%, P2= 6,3%, P3= 9,8%, P4= 4,7% (p >0,05); pacientes con estreñimiento: P1= 12,8%, P2= 21,6%, P3= 40,6%, P4= 20,5% (p= 0,034). Pauta de analgesia: P1= 42,9%, P2= 53,5%, P3= 53,7%, P4= 62,7% (p= 0,02). Reconsultas al servicio de urgencias: P1= 10,4%, P2= 2,1%, P3= 1,8%, P4= 13% (p <0,01). Conclusiones: El protocolo ha logrado reducir de forma significativa la realización de radiografías abdominales y el empleo de enemas rectales. Ha aumentado la prescripción de analgesia en pacientes con dolor abdominal. El protocolo ha logrado homogeneizar la actuación de los profesionales, disminuyendo el riesgo de yatrogenia y aumentando el confort de los pacientes y sus familias (AU)

Objectives: In January 2013 a protocol for the management of abdominal pain at pediatric emergency was implanted, with the following objectives: reducing abdominal radiographs not indicated, reduce treatment with enemas not indicated and more prescription of analgesia. It has been reviewed the impact of the protocol on changing clinical practice and whether these variations are maintained. Material and methods: Retrospective, descriptive and analytical observational study with 684 patients attending emergency department for abdominal pain apparently no organic cause, divided into four periods: December 2012 (P1), February 2013 (P2), November 2013 (P3) and May 2015 (P4). We collected data about diagnostic tests performed and treatments used in these patients. Results: Abdominal radiography: P1= 14.7%, P2= 6.9%, P3= 1.8%, P4= 0% (p <0.01); constipated patients: P1= 23.4%, P2= 13.5%, P3= 0%, P4= 0% (p= 0.001). Abdominal ultrasound: P1= 11%, P2= 12.5%, P3= 9.4%, P4= 10.1% (p >0.05). Patients treated with rectal enema: P1= 21.5%, P2= 8.3%, P3= 17.1%, P4= 11.7% (p= 0.005); constipated patients: P1= 51.1%, P2= 21.6%, P3= 31.3%, P4= 32.5% (p= 0.036). Patients treated with polyethylenglycol: P1= 4.3%, P2= 6.3%, P3= 9.8%, P4= 4.7% (p >0.05); constipated patients: P1= 12.8%, P2= 21.6%, P3= 40.6%, P4= 20.5% (p= 0.034). Patients treated with analgesia: P1= 42.9%, P2= 53.5%, P3= 53.7%, P4= 62.7% (p= 0.02). Reconsultations the emergency department: P1= 10.4%, P2= 2.1%, P3= 1.8%, P4= 13% (p <0.01). Conclusions: The protocol has reduced significantly the performance of abdominal radiographs and use of rectal enemas. It has increased the prescription of analgesia in patients with abdominal pain. Protocol has managed to standardize the medical intervention, reducing the risk of iatrogenic and increasing comfort for patients and their families (AU)

Infectious complications related to external ventricular shunt. Incidence and risk factors. / Complicaciones infecciosas relacionadas con el drenaje ventricular externo. Incidencia y factores de riesgo.

OBJECTIVE: Infectious complications related to external ventricular shunt (ICREVS) are a main problem in neurocritical intensive care units (ICU). The aim of the review is to assess the incidence of ICREVS and to analyse factors involved. METHODS: Retrospective analysis, adult polyvalent ICU in a third level reference hospital. Patients carrying external ventricular shunt (DVE) were included. Those patients with central nervous system infection diagnosed prior DVE placement were excluded. RESULTS: 87 patients were included with 106 DVE. Most common admittance diagnosis was subarachnoid haemorrhage (49.4%). 31 patients with 32 DVE developed an ICREVS. Infection rate is 19.5 per 1000 days of shunt for ICREVS and 14 per 1000 days for ventriculitis. 31.6% of the patients developed ICREVS and 25.3% ventriculitis. Patients who developed ICREVS presented higher shunt manipulations (2.0 ± 0.6 vs. 3.26 ± 1.02, p=0.02), shunt repositioning (0.1 ± 0.1 vs. 0.2 ± 0.1) and ICU and hospital stay (29.8 ± 4.9 vs 49.8 ± 5.2, p<0.01 y 67.4 ± 18.8 vs. 108.9 ± 30.2, p=0.02. Those DVE with ICREVS were placed for longer not only at infection diagnosis but also at removal (12.6 ± 2.1 vs. 18.3 ± 3.6 and 12.6 ± 2.1 vs. 30.4 ± 7.3 days, p<0.01). No difference in mortality was found. CONCLUSIONS: One out of three patients with a DVE develops an infection. The risk factors are the number of manipulations, repositioning and the permanency days. Patients with ICREVS had a longer ICU and hospital average stay without an increase in mortality.

Multiple myeloma patients in long-term complete response after autologous stem cell transplantation express a particular immune signature with potential prognostic implication.

The proportion of multiple myeloma patients in long-term complete response (LTCR-MM) for more than 6 years after autologous stem cell transplantation (ASCT) is small. To evaluate whether this LTCR is associated with a particular immune signature, peripheral blood samples from 13 LTCR-MM after ASCT and healthy blood donors (HBD) were analysed. Subpopulations of T-cells (naïve, effector, central memory and regulatory), B-cells (naïve, marginal zone-like, class-switched memory, transitional and plasmablasts) and NK-cells expressing inhibitory and activating receptors were quantified by multiparametric flow cytometry (MFC). Heavy/light chains (HLC) were quantified by nephelometry. The percentage of CD4+ T-cells was lower in patients, whereas an increment in the percentage of CD4+ and CD8+ effector memory T-cells was associated with the LTCR. Regulatory T-cells and NK-cells were similar in both groups but a particular redistribution of inhibitory and activating receptors in NK-cells were found in patients. Regarding B-cells, an increase in naïve cells and a corresponding reduction in marginal zone-like and class-switched memory B-cells was observed. The HLC values were normal. Our results suggest that LTCR-MM patients express a particular immune signature, which probably reflects a 'high quality' immune reconstitution that could exert a competent anti-tumor immunological surveillance along with a recovery of the humoral immunity.

A high migratory capacity of donor T-cells in response to the lymph node homing receptor CCR7 increases the incidence and severity of GvHD.

The pathogenesis of GvHD involves migration of donor T-cells into the secondary lymphoid organs in the recipient, which is steered by two homing molecules, CD62L and CCR7. Therefore, we investigated whether the migratory capacity of donor T-cells is associated with GvHD. This single center prospective study included 85 donor-recipient pairs. In vitro chemotaxis assays of the lymphocytes of the apheresis product were performed in parallel to the analysis of CD62L and CCR7 by flow cytometry. The migratory index to the CCR7 ligands, CCL19 and CCL21, was higher in T-cells from donors whose recipients will develop GvHD. Similarly, the acute GvHD (aGvHD) group received higher percentage of CD4+CCR7+ T-cells, whereas chronic GvHD (cGvHD) patients were transplanted with higher percentages of CD8+CCR7+ T-cells compared with the non-GvHD group. These results were confirmed when patients were subdivided according to degrees of severity. Further, multivariate analysis confirmed that the proportions of CCR7+ CD4+ and CCR7+ CD8+ T-cells are risk factors for the development and severity of aGvHD and cGvHD, respectively. Functional experiments demonstrated that CCR7+ T-cells exhibited higher potential for activation than CCR7- T-cells did. We therefore propose that the selective depletion of CCR7-expressing T-cells may be an effective preventive therapy for GvHD.

Unidad de Urgencias de Pediatría del Hospital Infantil Universitario Miguel Servet / Emergency unit of pediatrics of the Hospital Infantil Universitario Miguel Servet

La Unidad de Urgencias de Pediatría del Hospital Universitario Miguel Servet de Zaragoza, centro de referencia de la Comunidad Autónoma de Aragón, tiene un compromiso con las líneas estratégicas del centro, destacando la actividad asistencial, docencia e investigacion clínica en las que están involucrados todos los profesionales de la Unidad. Su finalidad está centrada en el paciente y sus familias, en la resolución urgente de todas las situaciones clínicas que requieran atención inmediata por problemas médicos, quirúrgicos o traumatológicos, en el menor tiempo posible, con la mayor efectividad y con una óptima calidad científico- técnica, durante las 24 horas del día, todos los días del año. Exponemos los principales datos asistenciales, docentes y de investigación (AU)

The Children’s Emergency Department at the Miguel Servet University Hospital in Zaragoza, as a reference centre in Aragon, has a commitment to the hospital strategies emphasising health care, teaching and research activities, in which all professionals Working in the department are involved. Its purpose is, focused on the patient and their family, the urgent solution to all clinical situations requiring immediate attention due to medical, surgical or trauma problems with the greatest effectiveness and optimum scientific and technical quality 24 hours a day, every day of the year (AU)

Recogida de orina en el lactante febril para el diagnóstico de la infección urinaria en Urgencias / Collection of urine in febrile infants for diagnosis of urinary tract infection in the Emergencies’ room

Introducción: la infección del tracto urinario (ITU) es una enfermedad frecuente en niños. Resulta fundamental una adecuada recogida de orina para evitar falsos positivos, minimizando procedimientos invasivos. La recogida de orina al acecho es una técnica incruenta, con baja tasa de contaminación, por lo que se estableció como método de elección al actualizar nuestro protocolo clínico. Material y métodos: estudio prospectivo longitudinal descriptivo y analítico, realizado en el Servicio de Urgencias de un hospital terciario, en dos periodos, antes y después de la actualización del protocolo. Se analizaron: edad, sexo, tiempo en Urgencias, método de recogida, sedimento y cultivo de orina y diagnóstico, en pacientes febriles menores de tres años. Resultados: hubo 140 pacientes en 2012 y 180 en 2011, sin diferencias en distribución por sexo y edad. Las medias etarias fueron 12 y 14 meses respectivamente. El 35,7% se recogieron por acecho en 2012, frente al 7,8% de 2011 (p<0,001). En 2011 fueron necesarias más confirmaciones: 20,5% frente a 10,7% en 2012. No hubo diferencias significativas en el número de sospechas de ITU ni en el de muestras contaminadas en ambos años. Tampoco entre las muestras recogidas por acecho o sondaje en 2012. El tiempo medio de estancia en Urgencias en 2011 fue 221 minutos, siendo 190 en 2012 (p<0,05). Conclusiones: la recogida de orina mediante el acecho constituye un método sencillo y no invasivo, que generalmente no precisa confirmación, por lo que reduce el tiempo de espera en el Servicio de Urgencias. No se ha objetivado un aumento de falsos diagnósticos de ITU en pacientes con muestra recogida por acecho (AU)

Introduction: urinary tract infection (UTI) in children is a common process. It is essential to find an adequate method to collect urine, to avoid false positives, minimizing invasive procedures. Clean catch urine (CCU) is a noninvasive technique, with low contamination rate, so it has been established as the recommended method for urine collection to update our clinical protocol. Material and methods: a prospective longitudinal descriptive and analytical study was conducted in a tertiary hospital in the Emergencies’ room (ER) in two periods, before and after the update protocol. Age, sex, time in the ER, collection method, sediment and urine culture and diagnosis in febrile patients <3 years were analyzed. Results: there were 140 patients in 2012 and 180 in 2011, with no differences in age and sex distribution. The mean ages were 12 and 14 months respectively. 35.7% of the samples were collected by CCU in 2012, compared to 7.8% in 2011 (p<0.001). In 2011 more confirmations of urine analysis were necessary: 20.5% vs. 10.7% in 2012. There were no significant differences between the number of suspected UTI or the contaminated samples in both years. Neither did between samples collected by catheterization or CCU in 2012. The average length of stay in the ER in 2011 was 221 minutes, while 190 in 2012 (p<0.05). Conclusions: urine collection by CCU is a simple and noninvasive method, which usually does not require confirmation, thereby reducing the wait time in the ER. There has not been an objectified increased of false diagnosis of UTI in patients with sample collected by CCU (AU)

Autoantibodies against TIF-1-γ and CADM-140 in Spanish patients with clinically amyopathic dermatomyositis (CADM): clinical significance and diagnostic utility.

BACKGROUND: Patients with clinically amyopathic dermatomyositis (CADM) appear to be at risk for developing cancer and interstitial lung diseases, but population data to confirm this hypothesis are limited. Moreover, CADM presents cutaneous and histological findings that may overlap with subacute cutaneous lupus erythematosus (SCLE). OBJECTIVES: To determine the association between myositis-specific autoantibodies, myositis-associated autoantibodies and CADM in Spanish patients. In addition, to study the usefulness of these autoantibodies in the differential diagnosis between CADM and SCLE. METHODS: Serum samples were tested for myositis-specific autoantibodies and myositis-associated autoantibodies through immunoprecipitation and other standardized methods. RESULTS: Anti-CADM-p140 and anti-p155 antibodies were the only myositis-specific autoantibodies found and were associated with interstitial lung diseases and cancer respectively. No myositis-associated autoantibodies were found in CADM. Moreover, clinical subsets and proportions seemed to differ from Asian cohorts, where anti-CADM-p140 is considered a CADM hallmark antibody and a risk factor for the development of interstitial lung disease. Interestingly, anti-SSA was highly associated with SCLE, whereas no myositis-specific autoantibodies were found in this entity. LIMITATIONS OF THE STUDY: Association between CADM and myositis-specific autoantibodies and differences between CADM and SCLE were tested on a relatively small cohort of patients. CONCLUSION: There is an association between cancer-associated myositis and interstitial lung diseases and their hallmark autoantibodies in our cohort. In addition, the combined determination of myositis-specific autoantibodies and SSA autoantibodies may help to accurately discriminate SCLE from CADM.

Development of an autoimmune syndrome affecting the skin and internal organs in P-selectin glycoprotein ligand 1 leukocyte receptor-deficient mice.

OBJECTIVE: To define and characterize the progression of the spontaneous autoimmune disease that develops in mice in the absence of the leukocyte adhesion receptor P-selectin glycoprotein ligand 1 (PSGL-1). METHODS: Skin-resident immune cells from PSGL-1-deficient mice and C57BL/6 control mice of different ages were isolated and analyzed by flow cytometry. Biochemical parameters were analyzed in mouse serum and urine, and the presence of serum autoantibodies was investigated. Skin and internal organs were extracted, and their structure was analyzed histologically. RESULTS: Skin-resident innate and adaptive immune cells from PSGL-1(-/-) mice had a proinflammatory phenotype with an imbalanced T effector cell:Treg cell ratio. Sera from PSGL-1(-/-) mice had circulating autoantibodies commonly detected in connective tissue-related human autoimmune diseases. Biochemical and histologic analysis of skin and internal organs revealed skin fibrosis and structural and functional abnormalities in the lungs and kidneys. Furthermore, PSGL-1(-/-) mice exhibited vascular alterations, showing loss of dermal vessels, small vessel medial layer remodeling in the lungs and kidneys, and ischemic processes in the kidney that promote renal infarcts. CONCLUSION: Our study demonstrates that immune system overactivation due to PSGL-1 deficiency triggers an autoimmune syndrome with characteristics similar to systemic sclerosis, including skin fibrosis, vascular alterations, and systemic organ involvement. These results suggest that PSGL-1 expression contributes to the maintenance of the homeostasis of the immune system and could act as a barrier for autoimmunity in mice.

[Bicycle accidents treated in emergency departments. A multicentre study]. / Accidentes de bicicleta atendidos en los Servicios de Urgencias. Estudio multicéntrico.

OBJECTIVES: To describe epidemiological characteristics, types of injury, prognosis and medical management of bicycle-related Paediatric Emergency Department (ED) visits and to identify potential preventive measures. PATIENTS AND METHODS: This multicentred, observational prospective study included all children between 3 and 16 years of age treated for bicycle-related injuries in the Emergency Departments of 15 Spanish Hospitals belonging to the «Unintentional Paediatric Injury Workshop¼ of the Spanish Paediatric Emergency Society between the 1(st) of June 2011 and the 31(st) of May 2012. Characteristics of all ED visits, as well as epidemiological data and accident-related information, were collected. RESULTS: A total of 846 patients were included in the study, with a male predominance (72.9%) and a median age of 9.6 ± 3.6 years. Head injury was the third most common injury (22.3%) and the main cause of admission to the Pediatric Intensive Care Unit (PICU) (68.4%). More than three-quarters (77.9%) of the patients did not wear a helmet, which was significantly associated to a higher incidence of head injury and admission to PICU. Older children (OR 1.063) and bicycle injuries involving motor vehicles (OR 2.431) were identified as independent risk factors for worse outcomes. CONCLUSIONS: Since helmet use reduces up to 88% of central nervous system lesions secondary to head injury, promotion of its use should be the main preventive measure, followed by restriction of bike-riding to cycling areas.

La reacción anafiláctica en Urgencias de Pediatría: Revisión y comentarios / Anaphylactic reaction in Pediatric Emergency Service: A review and comments

Introducción. La anafilaxia en un síndrome multisistémico potencialmente fatal que con frecuencia se presenta de forma inesperada. Precisa un reconocimiento y tratamiento precoces, siendo el fármaco de elección la adrenalina intramuscular. Es muy importante un periodo de observación debido a que hasta en el 20% de los casos puede aparecer una reacción bifásica de igual o mayor intensidad. Objetivos. Evaluación del cambio en el manejo de las reacciones anafilácticas de nuestro Servicio de Urgencias Pediátricas tras la modificación del protocolo introduciendo las últimas recomendaciones de la EAACI (Academia Europea de alergología e Inmunología Clínica) en el 2007. Métodos. Estudio descriptivo retrospectivo de dos cohortes históricas revisando los informes de atención de Urgencias. La primera cohorte, de junio de 2005 a octubre de 2007 y la segunda cohorte, de enero a diciembre de 2008, tras la actualización de nuestro protocolo. Resultados. En la primera cohorte se recogieron un total de 9 casos, con una edad media de 4,3 años. Todos ellos fueron de gravedad leve-moderada. Un alimento fue el causante en la mayoría de los casos. Sólo en 5 casos se administró adrenalina. 8 de los pacientes permanecieron en observación y 4 se derivaron a consultas de Alergología. En la segunda cohorte, se recogieron un total de 17 casos, con una edad media de 5,9 años. Todos los casos fueron leve-moderados. Sólo en 10 casos se relacionó su etiología, siendo un alimento lo más frecuente y utilizándose en 13 casos la adrelina vía intramuscular. Todos los pacientes permanecieron en observación y 16 de ellos se derivaron a consultas de Alergología. Conclusiones. Es importante la existencia y actualización de protocolos en las Urgencias de Pediatría. En nuestra Unidad hemos mejorado en el reconocimiento y manejo de las reacciones anafilácticas en urgencias tras la actualización de nuestro protocolo basada en las últimas recomendaciones dadas por la EAACI (AU)

Background. Anaphylaxis is a potentially fatal multisystem syndrome that often occurs unexpectedly. Accurate recognition and early treatment remain the drug of choice for intramuscular adrenaline. It is very important observation period because up to 20% of cases may appear biphasic reaction of equal or greater intensity. Objective. Evaluation of the change in the managing of the anaphylactic reactions of our service of pediatric emergency after the modification of the protocol introducing the last recommendations of the EAACI of the year 2007. Methods. Retrospective study of two cohorts historical We review the reports in emergency care. The first cohort, from June 2005 to October 2007 and the second cohort, form January to December 2008, after the upgrade of our protocol. Results. In the first cohort were collected a total of 9 cases, with an average age of 4.3 years. All were of mild to moderate severity. A food was the cause in most cases. Only in 5 cases was administered adrenaline. 8 patients remained under observation and 4 patients were derived to allergy clinics. In the second cohort were collected a total of 17 cases, with an average age of 5.9 years. All cases were mild to moderate. Only in 10 cases was related etiology, being a food more often and used in 13 cases intramuscular adrenaline. All patients remained under observation and 16 of them were derived to allergy clinics. Conclusions. It is important to the existence and maintenance of protocols in emergency pediatrics. In our unit we have improved the recognition and management of anaphylactic reactions in the emergency after the upgrade of our protocol based on the latest recommendations issued by the EAACI (AU)