Impacto de la extracción del guano sobre las poblaciones de aves guaneras en algunas islas y puntas guaneras de la costa peruana

Universidad Nacional Agraria La Molina. Facultad de Ciencias. Departamento Académico de BiologíaEn el presente estudio, tratándose de un ejercicio académico, se analizó el impacto de la extracción del guano sobre las poblaciones de aves guaneras en las Islas Macabí, Guañape Sur, Mazorca y Chincha Norte, y las puntas guaneras San Juan de Marcona y Coles; determinándose que el impacto generado es moderado. Para este análisis, se utilizaron datos brindados por las instituciones de IMARPE y AGRORURAL y se construyeron matrices de evaluación ambiental para cada área de estudio, que permitieron jerarquizar y valorizar los impactos. Las actividades que se realizan en las campañas de extracción de guano y que generaron impacto alto sobre las poblaciones de aves guaneras en las seis zonas evaluadas fueron: Picado, Costura de sacos de guano, Desmantelamiento de la Infraestructura, Zarandeo y Barrido del guano. Éstas actividades obtuvieron mayor porcentaje de impacto que otras actividades que también se realizan en las campañas: Picado con un promedio de 61,1 por ciento, seguido por la actividad de Costura de sacos con un promedio de 57,4 por ciento, Desmantelamiento de la Infraestructura que pertenece a la Fase de Cierre con un promedio aproximado de 53,7 por ciento y Zarandeo con Barrido con un promedio de 38.8 por ciento cada una. Estos porcentajes fueron obtenidos al promediar los valores obtenidos de la Matriz de Leopold Modificada realizada en cada una de las seis zonas pertenecientes al área de estudio. Entre las alternativas de mejora para el manejo que se podrían incluir en las futuras Campañas de extracción de éste recursos, están: 1) establecer vedas de extracción de guano durante los meses de reproducción de las aves guaneras, 2) tomar en cuenta la variable distribución y disponibilidad de alimento de las aves, entre otras. La información que se obtuvo, será relevante para la mejora en la gestión, toma de decisiones y estrategias de conservación de las poblaciones de aves guaneras de la RNSIIPG.In the present study, the impact of guano extraction on the guano seabird population on the Macabí, Guañape Sur, Mazorca and Chincha Norte Islands was analyzed, as well as on the San Juan de Marcona and Coles Headlands; reaching the conclusion that the generated impact is moderate. For this analysis, data provided by the government institutions IMARPE and AGRORURAL was used, and environmental evaluation matrices were constructed for each study area, which allowed to order and to value the impacts. The activities carried out in the guano extraction campaigns that generated a high impact on the guano bird populations in the six evaluated zones were: Digging, Sewing guano sacks, Infrastructure Dismantling, Shuffling and Sweeping. These activities obtained a greater impact rate than other activities that also are carried out in the campaigns: Digging with an average of 61.1 percent followed by the activity of Sewing sacks with an average of 57.4 percent, Infrastructure Dismantling that belongs to the Closing Phase with an average of approximately 53.7 percent, and Shuffling and Sweeping with an average of 38.8 percent each. These percentages were obtained by averaging the values obtained from the Modified Leopold Matrix performed in each of the six areas belonging to the study area. Among the alternatives for improved management that could be included in future extraction campaigns of this resource are: 1) establishing temporary bans for guano extraction during the guano birds’ breeding season, and 2) considering variations in the distribution and availability of bird food, among others. The information obtained will be relevant to improve the RNSIIPG’s management, decision making and conservation strategies of the guano bird populations.Tesi

Cambios en los niveles de fitohormonas asociados al desarrollo de daño por sol en manzanas (Malus domestica) cv.Fuji

49 p.Hoy en día Chile se ubica en el quinto lugar a nivel mundial en exportaciones de manzanas, con el 10% del mercado mundial, siendo una de las actividades frutícolas más importantes del país y concentrando su producción en la Región del Maule. Uno de los principales descartes de exportación en chile es el daño por sol en la fruta, en la actualidad el daño por sol se ve favorecido por el complejo cambio climático con aumentos en las temperaturas y la radiación solar, pudiendo, ambos factores causar modificaciones en los aspectos bioquímicos, fisiológicos y morfológicos de los frutos que se encuentran bajo estas condiciones. El objetivo de este estudio fue evaluar el comportamiento de fitohormonas como el ácido indol-acético (AIA), ácido abscísico (ABA), ácido jasmónico (AJ) y ácido salicílico (AS), durante el desarrollo de daño por sol (estrés por alta radiación y alta temperatura) en manzanas cv. Fuji. En el estudio se llevaron a cabo dos ensayos durante la temporada 2015-2016, en el Huerto San Carlos de la comuna de San Clemente, Región del Maule. En el primer ensayo, se evaluaron los niveles de fitohormonas durante el desarrollo de daño por sol en la fruta (108 hasta 157 días después de plena flor DDPF) en tejido con diferentes exposición al sol en el árbol (ensayo de seguimiento); en el segundo, se evaluaron los niveles de fitohormonas en diferentes tejidos del fruto (piel, pulpa externa, pulpa interna y carpelo) de frutos expuestos repentinamente al sol (0 a 60 minutos de exposición) (ensayo de tiempo). En el ensayo de seguimiento, se recolectaron frutos para sacar muestras de tejido y ser congeladas con nitrógeno líquido, esta práctica se realizó cada 3 días hasta completar el periodo antes mencionado (108- 157 DDPF), posterior a esto se puso en un freezer a -80°C para luego ser analizadas. En el ensayo de tiempo, la recolección de las muestras se realizó a los 112 DDPF. Para realizar este ensayo, las muestras fueron congeladas en terreno con nitrógeno líquido, para luego ser guardadas en un freezer a -80°C para su posterior análisis. Las concentraciones de las fitohormonas (AIA, ABA, AJ y AS) fueron determinadas mediante la técnica de cromatografía liquida de alta resolución y ultra bajo volumen (UHPLC-masa), utilizando estándares comerciales para cada una de ellas. Los resultados fueron analizados mediante análisis de varianza. De acuerdo a los resultados obtenidos en el primer ensayo se observó que las fitohormonas ABA, AJ y AS presentaron mayor concentración en tejidos que fueron expuestos al sol en comparación con tejidos no expuestos al sol, mientras que las concentraciones de AIA fueron menores en frutos expuestos al sol y su concentración tendió a reducirse al pasar los DDPF. En el segundo ensayo se observó que los frutos al percibir un estrés repentino por alta radiación y temperatura sufrieron modificación en sus niveles de fitohormonas específicamente en los lados que fueron expuesto a estres; en el caso de AJ, AS Y ABA las concentraciones aumentaron durante el transcurso del tiempo que se sometieron a estrés; para el caso de AIA las concentraciones tendieron a bajar mientras aumentaba el tiempo de exposicion. Los resultados sugieren que la exposición al sol generó cambios en los niveles de concentración de las fitohormonas debido al estrés abiótico de altas temperaturas y alta radiación solar. Palabras claves: Exposición al sol, manzanas cv.Fuji, fitohormonas, ácido indolacético (AIA), ácido abscísico (ABA), ácido jasmónico, ácido salicílico./ABSTRAC:Today, Chile ranks fifth in the world in apple exports, with 10% of the world market, being one of the most important fruit activities in the country and concentrating its production in the Maule Region. One of the main export discards in Chile is the damage caused by the sun in the fruit, currently the damage caused by the sun is favored by the complex climate change with increases in temperatures and solar radiation, both of which may cause modifications in the biometric, physiological and morphological aspects of the fruits that are under these conditions. The objective of this study was to evaluate the behavior of phytohormones such as indole-acetic acid (AIA), abscisic acid (ABA), jasmonic acid (AJ) and salicylic acid (AS) during the development of radiation and high temperature sun damage ) in cv. Fuji The study carried out two trials during the 2015-2016 season, in the San Carlos orchard of the San Clemente commune, Maule Region. In the first trial, phytohormone levels were evaluated during the development of sun damage in fruit (108 to 157 days after full bloom DDPF) in tissue with different sun exposure in the tree (follow-up trial); in the second, the levels of phytohormones in different fruit tissues (skin, external pulp, internal pulp and carpel) of fruits exposed to the sun (0 to 60 minutes of exposure) (time trial) were evaluated. In the follow-up trial, the collected fruits were taken to the laboratory to extract tissue samples and to be frozen with liquid nitrogen, this practice was performed every 3 days until the aforementioned period (108-157 DDPF) was completed. In the time trial, sample collection was performed at 112 DPDF. To perform this test, the samples were frozen on the ground with liquid nitrogen, then stored in a freezer at -80 ° C for further analysis. The concentrations of phytohormones (AIA, ABA, AJ and AS) were determined using the high resolution and ultra low volume liquid chromatography (UHPLC-mass) technique, using commercial standards for each of them. The results were analyzed by analysis of variance. According to the results obtained in the first test, it was observed that the ABA, AJ and AS phytohormones presented higher concentration in tissues that were exposed to the sun compared to tissues not exposed to the sun, whereas the concentrations of AIA were lower in exposed fruits The sun and its concentration tended to decrease when passing the DDPF. In the second trial it was observed that the fruits when perceiving a sudden stress by high radiation and temperature underwent modifications in their levels of phytohormones specifically in the sides that were exposed to the stresses; in the case of AJ, AS and ABA concentrations increased during the course of the time they underwent stress; In the case of AIA, concentrations tended to decrease while exposure time increased. The results suggest that sun exposure generated changes in phytohormone concentration levels due to the abiotic stress of high temperatures and high radiation. Key words: Sun exposure, cv.Fuji apples, phytohormones, indoacetic acid (AIA), abscisic acid (ABA), jasmonic acid, salicylic acid

Calidad en el servicio del programa de tamizaje neonatal universal y su relación con la percepción de las madres sobre el bienestar del recién nacido

El presente estudio tuvo como objetivo determinar la relación entre la calidad en el servicio del programa de tamizaje neonatal universal y la percepción materna del bienestar del niño en tratamiento. La investigación siguió un diseño observacional, de tipo cuantitativo, trasversal y de nivel relacional. La muestra estuvo conformada por 194 madres cuyos hijos fueron diagnosticados con alguna enfermedad en el tamizaje neonatal universal o posterior. Para la recolección de datos, se elaboró y validó un cuestionario para evaluar el bienestar de los menores de edad a partir de la percepción de las madres; asimismo, para evaluar la calidad en el servicio recibido se utilizó el cuestionario SERVPERF, ambos bajo escala de Likert. Los resultados del análisis de correlación de Spearman mostraron que la calidad en el servicio dirigida a la población infantil se relaciona con una mayor percepción de bienestar de los niños diagnosticados. Asimismo, se verificó el efecto positivo del diagnóstico neonatal oportuno y de una adecuada calidad de atención sobre la percepción materna del bienestar durante el proceso asistencial. En conclusión, elevar integralmente los estándares de calidad resulta indispensable para mejorar la adherencia y la calidad de vida de los pacientes pediátricos y sus familias.The aim of the present study was to determine the relationship between the quality of the universal neonatal screening program and maternal perceptions of the well-being of the child under treatment. The research followed an observational, quantitative, cross-sectional, and relational design. The sample consisted of 194 mothers whose children were diagnosed with a disease during the universal newborn screening or later. For data collection, a questionnaire was developed and validated to evaluate the well-being of the children based on the mothers' perception; likewise, the SERVPERF questionnaire was used to evaluate the quality of the service received, both on a Likert scale. The results of the Spearman correlation analysis showed that the quality of the service provided to the child population was related to a greater perception of the well-being of the children diagnosed. Likewise, the positive effect of timely neonatal diagnosis and adequate quality of care on maternal perceptions of well-being during the care process was verified. In conclusion, it is essential to raise quality standards in order to improve the adherence and quality of life of pediatric patients and their families

Estudio de la variación del sistema de labranza en el sudoeste bonaerense en ambientes con riesgo a erosión, período 2008-2022

En el Sudoeste de la Provincia de Buenos Aires (Argentina) existe alto riesgo de erosión eólica por las escasas precipitaciones, texturas finas y fuertes vientos. Sumado a la roturación mecánica anual, provoca la pérdida de la capa fértil del suelo y suficiente polvo en suspensión para afectar a los centros urbanos, que pone de manifiesto la importancia de generar más información. La Agencia de Extensión INTA Bahía Blanca evaluó que la siembra convencional (SC) ocupaba el 80% de la superficie y la siembra directa (SD), el 20% restante en el período 2008-2010. En 2017, la tendencia se invirtió. Como seguimiento de ese relevamiento, el objetivo del trabajo es evaluar la variación del empleo de sistemas de labranza dentro del Partido de Cnel. Rosales para el período 2018-2022. La metodología consistió en la georreferenciaron de parcelas con diferentes usos del suelo. Se emplearon series multitemporales de imágenes satelitales Sentinel-2, sobre las que se calculó el Índice Normalizado de Diferencia de Vegetación – NDVI. Los resultados mostraron que la SD ocupó el 33% y la SC, el 67% de la superficie, reflejando una tendencia contraria a la identificada en 2008-2017. La relación kilos de trigo para comprar gas oil se redujo o mantuvo estable, mientras que para adquirir herbicida tuvo una tendencia creciente. Por lo cual, el costo de la SD fue un 100% superior a la SC. Esta problemática requiere un abordaje multidisciplinario enmarcado dentro de un plan, que contribuya a equilibrar las variables implicadas para la sustentabilidad del territorio.In the Southwest of Buenos Aires Province (Argentina) there is a high risk of wind erosion due to low rainfall, fine textures and strong winds. Added to the annual mechanical ploughing, this causes the loss of the fertile soil layer and enough dust in suspension to affect urban centres, which highlights the importance of generating more information. The INTA Bahía Blanca Extension Agency assessed that conventional sowing (CS) occupied 80% of the area and no-tillage (NT) the remaining 20% in the period 2008-2010. In 2017, the trend was reversed. As a follow-up of this survey, the objective of this work is to evaluate the variation in the use of tillage systems within the Cnel. Rosales district for the period 2018-2022. The methodology consisted in the georeferencing of plots with different land uses. Multitemporal series of Sentinel-2 satellite images were used, on which the Normalized Difference Vegetation Index - NDVI was calculated. The results showed that SD occupied 33% and SC 67% of the area, reflecting a trend opposite to that identified in 2008-2017. The ratio of kg of wheat to purchase gas oil decreased or remained stable, while the ratio of kg of wheat to purchase herbicide had an increasing trend. As a result, the cost of SD was 100% higher than SC. This problem requires a multidisciplinary approach within the framework of a plan that contributes to balancing the variables involved for the sustainability of the territory.AER Bahía Blanca. Estación Experimental Agropecuaria Bordenave.Fil: Lauric, Miriam Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Scoponi, Liliana. Universidad Nacional del Sur. Departamento de Ciencias de la Administración; Argentina.Fil: Torres Carbonell, Carlos Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Torres Carbonell, Carlos Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina.Fil: De Leo, Gerónimo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Carrasco, María Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina

Estudio de la variación del sistema de labranza como aporte al observatorio de prácticas sostenibles para la gestión territorial (partido de Cnel. Rosales)

Evaluar la variación del sistema de labranza en lotes de cultivos dentro del Partido de Cnel. Rosales en el período 2018-2022 generando información local que contribuya Observatorio Territorial de Prácticas Sostenibles Locales (OTPSL) como instrumento de Ordenamiento Territorial.Estación Experimental Agropecuaria BordenaveFil: Lauric, Miriam Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: De Leo, Gerónimo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Marini, Mario Fabián. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Torres Carbonell, Carlos Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Torres Carbonell, Carlos Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina.Fil: Carrasco, María Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave. Agencia de Extensión Rural Bahía Blanca; Argentina.Fil: Scoponi, Liliana. Universidad Nacional del Sur. Departamento de Administración; Argentina

Instalación y configuración de servicios de infraestructura IT en Zentyal server 6.2

En este documento se muestra la instalación y configuración en VirtualBox de varios servicios de infraestructura IT en Zentyal Server 6.2 Development, destinado a formular soluciones bajo GNU/Linux. Se evidencia paso a paso la instalación del servidor y las temáticas abarcadas por el estudiante, aplicando las pruebas respectivas para validar su correcto funcionamiento. Estos servicios son DHCP Server, DNS Server y Controlador de dominio; Proxy no transparente para el control de acceso de una estación GNU/Linux a Internet filtrando la salida por el puerto 1230; Cortafuegos para restringir la navegación de sitios web de entretenimiento y redes sociales y validando las restricciones solicitadas desde una estación cliente; File server y Print server para detallar el acceso de un equipo por medio del controlador de dominio LDAP a los servicios de carpetas compartidas e impresoras y finalmente, VPN para establecer un túnel privado de comunicación con un equipo cliente.In the following document, it is shown the installation and setup in VirtualBox of many IT infrastructure services in Zentyal Server 6.2 Development addressed to develop solutions in GNU/Linux. It highlights the step-by-step of the Server's installation and the covered topics by the student applying the pertinent tests in order to check its right operation. These services are DHCP Server, DNS Server and Domain Controller; Non-transparent Proxy for a GNU/Linux station's control access to Internet filtering the outgoing data through the port 1230; Firewall in order to restrict browsing on entertainment sites and social media and confirming the requested restrictions from a client station; Filer Server and Print Server to detail a station's access through the Domain Controller LDAP to the shared folders service and printers. Finally, a VPN to establish a private communication tunnel to a client station

Towards a Combined Use of Geophysics and Remote Sensing Techniques for the Characterization of a Singular Building: “El Torreón” (the Tower) at Ulaca Oppidum (Solosancho, Ávila, Spain)

This research focuses on the study of the ruins of a large building known as “El Torreón” (the Tower), belonging to the Ulaca oppidum (Solosancho, Province of Ávila, Spain). Different remote sensing and geophysical approaches have been used to fulfil this objective, providing a better understanding of the building’s functionality in this town, which belongs to the Late Iron Age (ca. 300–50 BCE). In this sense, the outer limits of the ruins have been identified using photogrammetry and convergent drone flights. An additional drone flight was conducted in the surrounding area to find additional data that could be used for more global interpretations. Magnetometry was used to analyze the underground bedrock structure and ground penetrating radar (GPR) was employed to evaluate the internal layout of the ruins. The combination of these digital methodologies (surface and underground) has provided a new perspective for the improved interpretation of “El Torreón” and its characteristics. Research of this type presents additional guidelines for better understanding of the role of this structure with regards to other buildings in the Ulaca oppidum. The results of these studies will additionally allow archaeologists to better plan future interventions while presenting new data that can be used for the interpretation of this archaeological complex on a larger scale

Zoonotic "Enterocytozoon bieneusi" genotypes in free-ranging and farmed wild ungulates in Spain

Microsporidia comprises a diverse group of obligate, intracellular, and spore-forming parasites that infect a wide range of animals. Among them, Enterocytozoon bieneusi is the most frequently reported species in humans and other mammals and birds. Data on the epidemiology of E. bieneusi in wildlife are limited. Hence, E. bieneusi was investigated in eight wild ungulate species present in Spain (genera Ammotragus, Capra, Capreolus, Cervus, Dama, Ovis, Rupicapra, and Sus) by molecular methods. Faecal samples were collected from free-ranging (n = 1058) and farmed (n = 324) wild ungulates from five Spanish bioregions. The parasite was detected only in red deer (10.4%, 68/653) and wild boar (0.8%, 3/359). Enterocytozoon bieneusi infections were more common in farmed (19.4%, 63/324) than in wild (1.5%, 5/329) red deer. A total of 11 genotypes were identified in red deer, eight known (BEB6, BEB17, EbCar2, HLJD-V, MWC_d1, S5, Type IV, and Wildboar3) and three novel (DeerSpEb1, DeerSpEb2, and DeerSpEb3) genotypes. Mixed genotype infections were detected in 15.9% of farmed red deer. Two genotypes were identified in wild boar, a known (Wildboar3) and a novel (WildboarSpEb1) genotypes. All genotypes identified belonged to E. bieneusi zoonotic Groups 1 and 2. This study provides the most comprehensive epidemiological study of E. bieneusi in Spanish ungulates to date, representing the first evidence of the parasite in wild red deer populations worldwide. Spanish wild boars and red deer are reservoir of zoonotic genotypes of E. bieneusi and might play an underestimated role in the transmission of this microsporidian species to humans and other animal

Hospital emergency department utilisation rates among the immigrant population in Barcelona, Spain

<p>Abstract</p> <p>Background</p> <p>The recent increase in the number of immigrants of Barcelona represents a challenge for the public healthcare system, the emergency department being the most used healthcare service by this group. However, utilisation rates in our environment have not yet been studied. We aimed to compare emergency department utilisation rates between Spanish-born and foreign-born residents in a public hospital of Barcelona.</p> <p>Methods</p> <p>The <it>s</it>tudy population included all adults residing in the area of study and visiting the emergency department of Hospital del Mar in 2004. The emergency care episodes were selected from the Emergency Department register, and the population figures from the Statistics Department of Barcelona. Emergency care episodes were classified into five large clinical categories. Adjusted rate ratios (RR) of utilisation among foreign-born vs. Spanish-born residents were assessed through negative binomial regression.</p> <p>Results</p> <p>The overall utilisation rate was 382 emergency contacts per 1,000 persons-years. The RR for foreign-born versus Spanish-born residents was 0.62 (95% CI: 0.52; 0.74%). The RR was also significantly below one in surgery (0.51, 95% CI: 0.42; 0.63), traumatology (0.47, 95% CI: 0.38; 0.59), medicine (0.48, 95% CI: 0.38; 0.59) and psychiatry (0.42, 95% CI: 0.18; 0.97). No differences were found in utilisation of gynaecology and minor emergency services.</p> <p>Conclusion</p> <p>The overall lower utilisation rates obtained for foreign-born residents is consistent with previous studies and is probably due to the "healthy immigrant effect". Thus, the population increase due to immigration does not translate directly into a corresponding increase in the number of emergency contacts. The lack of differences in minor and gynaecological emergency care supports the hypothesis that immigrants overcome certain barriers by using the emergency department to access to health services. The issue of healthcare barriers should therefore be addressed, especially among immigrants.</p

Antimicrobial resistance among migrants in Europe: a systematic review and meta-analysis

BACKGROUND: Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings. METHODS: For this systematic review and meta-analysis, we searched MEDLINE, Embase, PubMed, and Scopus with no language restrictions from Jan 1, 2000, to Jan 18, 2017, for primary data from observational studies reporting antibacterial resistance in common bacterial pathogens among migrants to 21 European Union-15 and European Economic Area countries. To be eligible for inclusion, studies had to report data on carriage or infection with laboratory-confirmed antibiotic-resistant organisms in migrant populations. We extracted data from eligible studies and assessed quality using piloted, standardised forms. We did not examine drug resistance in tuberculosis and excluded articles solely reporting on this parameter. We also excluded articles in which migrant status was determined by ethnicity, country of birth of participants' parents, or was not defined, and articles in which data were not disaggregated by migrant status. Outcomes were carriage of or infection with antibiotic-resistant organisms. We used random-effects models to calculate the pooled prevalence of each outcome. The study protocol is registered with PROSPERO, number CRD42016043681. FINDINGS: We identified 2274 articles, of which 23 observational studies reporting on antibiotic resistance in 2319 migrants were included. The pooled prevalence of any AMR carriage or AMR infection in migrants was 25·4% (95% CI 19·1-31·8; I2 =98%), including meticillin-resistant Staphylococcus aureus (7·8%, 4·8-10·7; I2 =92%) and antibiotic-resistant Gram-negative bacteria (27·2%, 17·6-36·8; I2 =94%). The pooled prevalence of any AMR carriage or infection was higher in refugees and asylum seekers (33·0%, 18·3-47·6; I2 =98%) than in other migrant groups (6·6%, 1·8-11·3; I2 =92%). The pooled prevalence of antibiotic-resistant organisms was slightly higher in high-migrant community settings (33·1%, 11·1-55·1; I2 =96%) than in migrants in hospitals (24·3%, 16·1-32·6; I2 =98%). We did not find evidence of high rates of transmission of AMR from migrant to host populations. INTERPRETATION: Migrants are exposed to conditions favouring the emergence of drug resistance during transit and in host countries in Europe. Increased antibiotic resistance among refugees and asylum seekers and in high-migrant community settings (such as refugee camps and detention facilities) highlights the need for improved living conditions, access to health care, and initiatives to facilitate detection of and appropriate high-quality treatment for antibiotic-resistant infections during transit and in host countries. Protocols for the prevention and control of infection and for antibiotic surveillance need to be integrated in all aspects of health care, which should be accessible for all migrant groups, and should target determinants of AMR before, during, and after migration. FUNDING: UK National Institute for Health Research Imperial Biomedical Research Centre, Imperial College Healthcare Charity, the Wellcome Trust, and UK National Institute for Health Research Health Protection Research Unit in Healthcare-associated Infections and Antimictobial Resistance at Imperial College London