Causal Pathways from Enteropathogens to Environmental Enteropathy: Findings from the MAL-ED Birth Cohort Study

Background Environmental enteropathy (EE), the adverse impact of frequent and numerous enteric infections on the gut resulting in a state of persistent immune activation and altered permeability, has been proposed as a key determinant of growth failure in children in low- and middle-income populations. A theory-driven systems model to critically evaluate pathways through which enteropathogens, gut permeability, and intestinal and systemic inflammation affect child growth was conducted within the framework of the Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) birth cohort study that included children from eight countries. Methods Non-diarrheal stool samples (N = 22,846) from 1253 children from multiple sites were evaluated for a panel of 40 enteropathogens and fecal concentrations of myeloperoxidase, alpha-1-antitrypsin, and neopterin. Among these same children, urinary lactulose:mannitol (L:M) (N = 6363) and plasma alpha-1-acid glycoprotein (AGP) (N = 2797) were also measured. The temporal sampling design was used to create a directed acyclic graph of proposed mechanistic pathways between enteropathogen detection in non-diarrheal stools, biomarkers of intestinal permeability and inflammation, systemic inflammation and change in length- and weight- for age in children 0–2 years of age. Findings Children in these populations had frequent enteric infections and high levels of both intestinal and systemic inflammation. Higher burdens of enteropathogens, especially those categorized as being enteroinvasive or causing mucosal disruption, were associated with elevated biomarker concentrations of gut and systemic inflammation and, via these associations, indirectly associated with both reduced linear and ponderal growth. Evidence for the association with reduced linear growth was stronger for systemic inflammation than for gut inflammation; the opposite was true of reduced ponderal growth. Although Giardia was associated with reduced growth, the association was not mediated by any of the biomarkers evaluated. Interpretation The large quantity of empirical evidence contributing to this analysis supports the conceptual model of EE. The effects of EE on growth faltering in young children were small, but multiple mechanistic pathways underlying the attribution of growth failure to asymptomatic enteric infections had statistical support in the analysis. The strongest evidence for EE was the association between enteropathogens and linear growth mediated through systemic inflammation

Occupational Burnout Syndrome in the nursing context: an integrative literature review

OBJECTIVE To characterize the scientific production on Burnout Syndrome in the Nursingcontext, systematizing the location where the studies were carried out, the related constructs, the employed methods and their main results. METHOD An integrative review of the literature with a bibliometric approach of articles published in Portuguese, Spanish and English between 2005 and 2016. RESULTS 106 articles wereincluded. Mostinvolvedprevalence, and were descriptive, quantitative studies performed in hospitals.The Southeastern and Southern regions of Brazil had the largest number of publications, and stress was the construct most related to burnout.Most of the studies used the Maslach Burnout Inventory to investigate the presence of the syndrome. CONCLUSION New case-control and cohort studies should be carried out.Qualitative-exploratory studies are necessary to better understand Burnout Syndrome among nursing professionals usingfocus groups or interviews, as well as comparative causal studies, with the purpose of exploring the syndrome’smanifestations.OBJETIVO Caracterizar a produção científica sobre a Síndrome do Esgotamento Profissionalno contexto da enfermagem, sistematizando os locais onde as pesquisas foram realizadas, os construtos relacionados, os métodos empregados e seus principais resultados. MÉTODO Revisão integrativa da literatura, com abordagem bibliométrica, em artigos na língua portuguesa, espanhola e inglesa publicados entre 2005 e 2016. RESULTADOS Foram selecionados 106 artigos.A maioria estudos de prevalência, descritivos, quantitativos e realizados em hospitais. Nas regiões Sudeste e Sul do Brasil encontram-se o maior número de publicações, sendo o estresse o construto mais relacionado com o esgotamento profissional. A maior parte dos estudos utilizou o Maslach Burnout Inventory como meio de averiguação da presença da síndrome. CONCLUSÃO Novos estudos de caso controle e coorte devem ser realizados. Pesquisas de cunho qualitativo-exploratório são necessárias para poder compreender melhor a Síndrome do Esgotamento Profissionalentre os profissionais de enfermagem com grupos focais ou entrevistas, como também pesquisas causais comparativas, com o intuito de explorar as manifestações da síndrome.OBJETIVO Caracterizar la producción científica acerca del Síndrome del Agotamiento Profesionalen el marco de la enfermería, sistematizando los sitios en donde las investigaciones fueron realizadas, los constructos relacionados, los métodos empleados y sus principales resultados. MÉTODO Revisión integrativa de la literatura, con abordaje bibliométrico, en artículos en lengua portuguesa, española e inglesa publicados entre 2005 y 2016. RESULTADOS Fueron seleccionados 106 artículos. La mayoría se compuso de estudios de prevalencia, descriptivos, cuantitativos y realizados en hospitales. En las regiones Sureste y Sur de Brasil se halla el mayor número de publicaciones, siendo el estrés el constructo más relacionado con el agotamiento profesional. La mayor parte de los estudios utilizó el Maslach Burnout Inventorycomo medio de la averiguación de la presencia del síndrome. CONCLUSIÓN Nuevos estudios de caso control y cohorte deben llevarse a cabo. Investigaciones de cuño cualitativo-exploratorio son necesarias para poder comprender mejor el Síndrome del Agotamiento Profesionalentre los profesionales de enfermería con grupos focales o entrevistas, como también investigaciones causales comparativas, a fin de explorar las manifestaciones del síndrome